These are representative sample records from Science.gov related to your search topic.
For comprehensive and current results, perform a real-time search at Science.gov.
1

The IAU Early French Radio Astronomy Project  

NASA Astrophysics Data System (ADS)

In 2006 an ambitious project was launched under the auspices of the IAU Working Group on Historic Radio Astronomy to document important developments in French radio astronomy from 1901 through to the 1960s, in a series of papers published, in English, in the Journal of Astronomical History and Heritage. This successful project has now come to an end with the sixth and final paper in the series about to be published (and a new WG project, on the history of early Japanese radio astronomy, has just been launched). In this paper we discuss Nordmann's abortive attempt to detect solar radio emission in 1901, and the important roles played by staff from the École Normale Supérieure and the Institut d'Astrophysique in Paris during the 1940s through 60s in developing new radio astronomy instrumentation and pursuing a range of solar and non-solar research projects in Paris itself and at field stations established at Marcoussis, Nançay and the Haute Provence Observatory.

Orchiston, Wayne; Boischot, A.; Delannoy, J.; Kundu, M.; Lequeux, J.; Pick, M.; Steinberg, J.

2011-01-01

2

Senior Design Projects National Radio Astronomy Observatory  

E-print Network

signal processing hardware #12;8 ATelescope Designed to be Enhanced Software Engineering AdvancingSenior Design Projects National Radio Astronomy Observatory Richard Prestage, John Ford, Mark Near sidelobes reduced by a factor >10 from conventional antennas Gain & Sensitivity The 100 meter

Groppi, Christopher

3

Radio Astronomy Radio astronomy  

E-print Network

Effelsberg 100m telescope (Germany) Green Bank 100m telescope (National Radio Astronomy ObservatoryExperiment -10m (Chile, Europe) #12;Submillimeter radio astronomy #12;Size of telescope Snow sweep at Nobeyama 45;#12;Arecibo 300m telescope #12;Radio interferometer #12;Radio interferometer Very Large Array (VLA) (New

Metchev, Stanimir

4

Project CLEA: Radio Astronomy of Pulsars  

NSDL National Science Digital Library

This software for Windows, from Project CLEA -- Contemporary Laboratory Experiences In Astronomy, presents students with a radio telescope. The default operating characteristics (beam width, receiver noise, steerability) can be set by the instructor. Students can point the telescope at a source in the sky, viewing the output of the radio receiver on a graphic display that resembles a digital oscilloscope. The student manual describes exercises in which students acquaint themselves with the operation of the radio telescope, measure the signals from several pulsars at various frequencies, learn about pulsar signals, and then estimate the distance to the pulsar. The site includes student and instructor manuals as well as a pre- and posttest. The software is available for Windows only.

5

Radio astronomy  

Microsoft Academic Search

The following subject areas are covered: (1) scientific opportunities (millimeter and sub-millimeter wavelength astronomy; meter to hectometer astronomy; the Sun, stars, pulsars, interstellar masers, and extrasolar planets; the planets, asteroids, and comets; radio galaxies, quasars, and cosmology; and challenges for radio astronomy in the 1990's); (2) recommendations for new facilities (the millimeter arrays, medium scale instruments, and small-scale projects); (3)

Kenneth I. Kellermann; David Heeschen; Donald C. Backer; Marshall H. Cohen; Michael Davis; Imke de Pater; David De Young; George A. Dulk; J. R. Fisher; W. Miller Goss

1991-01-01

6

Radio Astronomy Software Defined Receiver Project  

SciTech Connect

The paper describes a Radio Astronomy Software Defined Receiver (RASDR) that is currently under development. RASDR is targeted for use by amateurs and small institutions where cost is a primary consideration. The receiver will operate from HF thru 2.8 GHz. Front-end components such as preamps, block down-converters and pre-select bandpass filters are outside the scope of this development and will be provided by the user. The receiver includes RF amplifiers and attenuators, synthesized LOs, quadrature down converters, dual 8 bit ADCs and a Signal Processor that provides firmware processing of the digital bit stream. RASDR will interface to a user s PC via a USB or higher speed Ethernet LAN connection. The PC will run software that provides processing of the bit stream, a graphical user interface, as well as data analysis and storage. Software should support MAC OS, Windows and Linux platforms and will focus on such radio astronomy applications as total power measurements, pulsar detection, and spectral line studies.

Vacaliuc, Bogdan [ORNL] [ORNL; Leech, Marcus [Shirleys Bay Radio Astronomy Consortium] [Shirleys Bay Radio Astronomy Consortium; Oxley, Paul [Retired] [Retired; Flagg, Richard [Retired] [Retired; Fields, David [ORNL] [ORNL

2011-01-01

7

Radio Astronomy  

NSDL National Science Digital Library

This article is a Why Files short piece on how astronomers use information from radio astronomy. Contrary to popular belief, large radio telescopes are not looking for signs of life outside our solar system, but are making images of black holes, centers of galaxies, and gamma ray bursts. These phenomena cannot be seen in visible light, but emit radio waves which can be translated into images. The article discusses how this process works, and the information gathered from radio waves.

Tenenbaum, David

8

(Astro)Physics 343 Observational Radio Astronomy  

E-print Network

. Last year: "Current and Future Radio Astronomy Projects" This year: the search for extraterrestrial intelligence? the New Jersey roots of radio astronomy? why the Iridium telecommunications satellites are evil

Baker, Andrew J.

9

Torun Radio Astronomy Observatory  

NASA Astrophysics Data System (ADS)

Torun Center for Astronomy is located at Piwnice, 15 km north of Torun, Poland. A part of the Faculty of Physics and Astronomy of the Nicolaus Copernicus University, it was created by the union of Torun Radio Astronomy Observatory (TRAO) and the Institute of Astronomy on 1 January 1997....

Murdin, P.

2000-11-01

10

Pulsars in a Box: A Radio Astronomy Exercise for Windows from PROJECT CLEA  

NASA Astrophysics Data System (ADS)

The latest astronomy laboratory exercise from PROJECT CLEA, "Radio Astronomy of Pulsars", is designed for use in introductory astronomy classes, but contains options and features that make it usable by upperclass astronomy students as well. The heart of the exercise is a simulated radio telescope, whose aperture, location, and beamwidth can be set by the instructor. It is steered by pushing buttons, but instead of seeing a star field on the field monitor,students see a projection of the sky showing, with a colored dot,where the beam is pointing. Large LED-like readouts display time and telescope coordinates. The telescope can be operated in either a tracking or transit mode. Using the telescope, students point to several pulsars suggested by the write-up (from an on-line catalog of over 500). Students can then use a multi-channel tunable receiver, with multiple oscilloscope displays, to view the incoming signal vs. time. The signal received is a combination of random receiver and background noise plus the pulsar signal (if it is in the beam) Receivers are tunable from 400 to 1400 MHz, and both the time and frequency behavior of signals can be studied. By measuring the dispersion delay at a number of different frequencies, students can determine the pulsar's distance. Data can be stored, displayed, and printed using a versatile measuring window. Though we provide a manual for a 2-3 hour lab exercise involving dispersion measures, the database and receivers can be used for a wide variety of other exercises, for instance the measurement of pulsar spin-down rates. We welcome suggestions for improvements and applications.

Marschall, L. A.; Snyder, G. A.; Good, R. F.; Hayden, M. B.; Cooper, P. R.

1996-12-01

11

Division X: Radio Astronomy  

NASA Astrophysics Data System (ADS)

The business meeting of Division X in the IAU 2009GA took place in three sessions during the day of August 6, 2009. The meeting, being well attended, started with the approval for the meeting agenda. Then the triennium reports were made in the first session by the president of Division X, Ren-Dong Nan, and by the chairs of three working groups: “Historic Radio Astronomy WG” by Wayne Orchiston, “Astrophysically Important Lines WG” by Masatoshi Ohishi, and “Global VLBI WG” by Tasso Tzioumis (proxy chair appointed by Steven Tingay). Afterwards, a dozen reports from observatories and worldwide significant projects have been presented in the second session. Business meeting of “Interference Mitigation WG” was located in the third session.

Nan, Ren-Dong; Taylor, Russ; Rodriguez, Luis F.; Chapman, Jessica; Dubner, Gloria; Garrett, Michael; Goss, W. Miller; Torrelles, Jose M.; Hirabayashi, Hisashi; Carilli, Chris; Hills, Richard; Shastri, Prajval

2010-05-01

12

Radio Frequency Interference: Projects and Activities Developed for the High School Earth Science, Astronomy, and Physics Classroom  

Microsoft Academic Search

Radio Frequency Interference: Projects and Activities Developed for the High School Earth Science, Astronomy, and Physics Classroom Susan Dunn Tewksbury Memorial High School Jason Brown Tyngsboro High School Preethi Pratap MIT Haystack Observatory The Research Experiences for Teachers (RET) program, funded by the NSF, brings teachers into research environments to interact with scientists and translate the experience into the classroom.

S. K. Dunn; J. Brown

2003-01-01

13

CRAF Handbook for Radio Astronomy  

E-print Network

sciences, medical sciences, humanities and social sciences. The Foundation assists its Member Organisations, Programmes, Networks, EUROCORES, and ESF Research Conferences, to work on topics of common concern includingCRAF Handbook for Radio Astronomy EUROPEAN SCIENCE FOUNDATION Committee on Radio Astronomy

Rodriguez, Luis F.

14

A Radio Astronomy Curriculum for STARLAB  

NASA Astrophysics Data System (ADS)

We present elements of a curriculum that will accompany the STARLAB module "Sensing the Radio Sky" a portable planetarium program and projection of the radio sky. The curriculum will serve to familiarize high school students to a set of topics in radio astronomy. The curriculum includes lessons and activities addressing several topics related to radio astronomy and the Milky Way that consists of two main resources: a manual and a multimedia website. It is designed to accommodate a wide variety of possible uses and time constraints. The manufacturer of STARLAB, Learning Technologies, Inc. produces a short manual to accompany each presentation for the STARLAB. The "Sensing the Radio Sky" manual we have created includes the mandatory, minimum background information that students need to understand radio astronomy. It briefly discusses waves and electromagnetic radiation, similarities and differences between optical and radio astronomy, probable misconceptions about radio astronomy, how radio images are produced, synchrotron radiation in the Milky Way, and galactic coordinates. It also includes a script that presenters can choose to follow inside the STARLAB, a lesson plan for teachers, and activities for students to complete before and after the STARLAB experience that mirror the scientific method. The multimedia website includes more detailed information about electromagnetic radiation and a more detailed comparison of optical and radio astronomy. It also discusses the life cycles of stars, radiation from a variety of specific sources, and pulsars, as each relates to radio astronomy. The five highly detailed lessons are pulled together in sixth "overview lesson", intended for use by teachers who want to present more than the basic material in the manual, but do not have the classroom time to teach all five of the in-depth lessons. . We acknowledge support from the NSF Internship in Public Science Education Program grant number 0324729.

Boltuch, D.; Hund, L.; Buck, S.; Fultz, C.; Smith, T.; Harris, R.; Castelaz, M. W.; Moffett, D.; LaFratta, M.; Walsh, L.

2005-12-01

15

Radio astronomy at Stanford  

NASA Astrophysics Data System (ADS)

Many astronomical topics were addressed by students and staff of the Stanford Radio Astronomy Institute over the course of decades, and some of the memorable milestones can be discussed here at length. These are antenna design and construction, the sunspot number series, astronomical tomography, the cosmic microwave background radiation, nulling interferometry for peering into circumstellar environments, celestial mechanics of the early Earth satellites, the extraterrestrial connection, dynamic spectra of exospheric phenomena, the versatile Hartley transform and Centaurus A. In addition to the text references, a complete list of solar publications related to the microwave spectroheliograph is appended. Further detail, and non-solar publications, are available in the annual reports published in the Astronomical Journal and Bulletin American Astronomical Society from 1961 to1980, especially the final report.

Bracewell, R. N.

2005-12-01

16

Expanding radio astronomy in Africa  

NASA Astrophysics Data System (ADS)

The Square Kilometre Array (SKA) Organisation announced in May 2012 that its members had agreed on a dual site solution for the SKA [1]. South Africa's bid for hosting the SKA has caused a ramp up of radio astronomy in Africa. To develop technology towards the SKA, the South African SKA Project (SKA SA) built a protoype radio telescope in 2007, followed in 2010 the seven antenna Karoo Array Telescope (KAT-7). Next is the 64 antenna MeerKAT, which will merge into SKA Phase 1 in Africa. As SKA Phase 2 is intended to add a high resolution capability with baselines out to 3000 km, the SKA SA brought in partner countries in Africa to host outstations. South Africa has been working with the partners to build capacity to operate the SKA and to benefit from it. The SA Department of Science and Technology (DST) developed a proposal to establish radio telescopes in the partner countries to provide hands-on learning and a capability for Very Long Baseline Interferometry (VLBI) research. Redundant 30 m class satellite antennas are being incorporated in this project.

Gaylard, M. J.

2013-04-01

17

The future for radio astronomy  

NASA Astrophysics Data System (ADS)

THE TRANSIENT UNIVERSE Rene P Breton and Tom Hassall argue that, while radio astronomy has always involved transient phenomena, exploration of this part of the electromagnetic spectrum has been falling behind because of the lack of data. But the advent of a new generation of radio telescopes such as LOFAR, could change that.

Breton, Rene P.; Hassall, Tom

2013-12-01

18

Radio Astronomy Fundamentals I John Simonetti  

E-print Network

Radio Astronomy Fundamentals I John Simonetti Spring 2012 Radio astronomy provides a very different view of the universe than optical astronomy. Radio astronomers and optical astronomers use different terminology to describe their work. Here I present some basic concepts and terms of radio

Ellingson, Steven W.

19

The development of radio astronomy  

NASA Astrophysics Data System (ADS)

Following the detection of extraterrestrial radio waves in 1932 by Karl Jansky, radio astronomy developed quickly after World War II. It established itself soon as a new branch of astronomy with today's outstanding record in the detection of new phenomena in space. These have been honoured by a number of Nobel prizes. Radio astronomy largely depends on technical developments in receiver technology, antenna systems, electronics and computing power. Ever shorter wavelengths down to the submm-wavelength range became accessible, resulting in new exciting discoveries. However, now and in future care must be taken, in particular for the lower frequency range, of harmful man-made interferences, which might mask the weak signals from space. New international facilities with orders-of-magnitude higher sensitivity like ALMA and SKA are planned or under construction. Space-borne observatories like PLANCK will detect weak fluctuations of the cosmic microwave background, which will constrain cosmological models with an unprecedented accuracy.

Reich, W.; Wielebinski, R.

2002-07-01

20

Synthesis imaging in radio astronomy  

SciTech Connect

Recent advances in techniques and instrumentation for radio synthesis imaging in astronomy are discussed in a collection of review essays. Topics addressed include coherence in radio astronomy, the interferometer in practice, primary antenna elements, cross correlators, calibration and editing, sensitivity, deconvolution, self-calibration, error recognition, and image analysis. Consideration is given to wide-field imaging (bandwidth and time-average smearing, noncoplanar arrays, and mosaicking), high-dynamic-range imaging, spectral-line imaging, VLBI, solar imaging with a synthesis telescope, synthesis imaging of spatially coherent objects, noise in images of very bright sources, synthesis observing strategies, and the design of aperture-synthesis arrays.

Perley, R.A.; Schwab, F.R.; Bridle, A.H.

1989-01-01

21

National Radio Astronomy Observatory Associated Universities, Inc.  

E-print Network

National Radio Astronomy Observatory Associated Universities, Inc. OUTSIDE OBSERVER TRAVEL: ________________________________________ Travel office East: Travel office West: Fiscal Office Fiscal Office National Radio Astronomy Observatory National Radio Astronomy Observatory P.O. Box 2 P.O. Box O 1 Green Bank, WV 24944-0002 Socorro, NM 87801

Groppi, Christopher

22

Non-thermal radio astronomy  

NASA Astrophysics Data System (ADS)

This presentation starts with Karl Jansky's discovery of cosmic radio emission in 1933 and notes the striking similarities to Hess's discovery of cosmic-rays in 1912. At first it was assumed that this radio emission was thermal but in 1939 Grote Reber discovered that it was stronger at longer wavelengths, requiring a non-thermal emission process. These discoveries had a revolutionary impact on astronomy and radio astronomy was born. The interpretation of this non-thermal radiation as synchrotron emission from high energy particles in the interstellar medium did not occur until the late 1940s but then it provided the link between radio astronomy and cosmic-ray research. Ginzburg, in particular, saw that cosmic-ray astrophysics was now possible using radio waves to trace sources of cosmic-rays. We discuss the discovery of extragalactic active galactic nuclei leading to the discovery of quasars and the first evidence for black holes in the nuclei of galaxies. We summarise the present status and future of some of the main radio telescopes used to image the non-thermal emission from external galaxies. Finally, we include a short description of the use of radio signals for the direct detection of cosmic-rays and UHE neutrinos.

Ekers, R. D.

2014-01-01

23

Weather Forecasting for Radio Astronomy  

E-print Network

Weather Forecasting for Radio Astronomy Part I: The Mechanics and Physics Ronald J Maddalena August 1, 2008 #12;Outline Part I Background -- research inspirations and aspirations Vertical weather, .... Part II Results on refraction & air mass (with Jeff Paradis) Part III Results on opacity, weather

Groppi, Christopher

24

Project Earth Science: Astronomy  

NSDL National Science Digital Library

The hands-on, teacher-tested activities in Project Earth Science: Astronomy brings the sometimes daunting concepts of astronomy down to Earth. Background information, supplementary readings, and suggestions for integrating other disciplines provide the teacher with a framework to launch a successful introduction to astronomy. Students will discover Earth's uniqueness by examining it as a part of the whole--one planet within our Solar System. How did the planets form? Are we seeing a star's present or past? Why is Earth's distance from the Sun so important? Project Earth Science: Astronomy will lead you and your students on an exploration that takes you to the stars and back.

P. Sean Smith

2001-01-01

25

RadioNet: Advanced Radio Astronomy in Europe  

NSDL National Science Digital Library

RadioNet, an Integrated Infrastructure Initiative (I3), has brought together 20 of "Europe's leading astronomy facilities to produce a focused, coherent and integrated project that will significantly enhance the quality and quantity of science performed by European astronomers." After learning about the Initiative's many objectives, users can find brief summaries of the program's integration of astronomy pursuits in the areas of transnational access, joint research activities, and networking activities. The website presents press releases, upcoming and past events, and information on engineering, software, and Atacama Large (sub)-Millimeter Array (ALMA) forums. Users can also find out about the individual collaborators research activities through the external links.

26

Utrecht and Galactic Radio Astronomy  

NASA Astrophysics Data System (ADS)

Important roles in early Dutch Galactic radio astronomy were played by several Utrecht astronomers: Van de Hulst, Minnaert and Houtgast. The poster announcing the conference contained a number of pictures referring to scientific achievements of the Astronomical Institute Utrecht. One of these (Figure 1) appears to show the spiral structure of our Galaxy. Detailed comparison with the famous H I map (Figure 2), published by Oort, Kerr, and Westerhout (1958) in their paper “The Galactic System as a Spiral Nebula”, indicates that both are based on the same data. However, the “OKW map” resulted from work done at Kootwijk, Leiden and Sydney. What claim does Utrecht have to this pinnacle of early Galactic Radio Astronomy? Let us trace the history behind this H I map, as sketched in more detail by Van Woerden & Strom (2006).

van Woerden, H.

2013-01-01

27

The Radio JOVE Project  

NASA Astrophysics Data System (ADS)

Radio JOVE is an interactive educational activity which brings the radio sounds of Jupiter and the Sun to students, teachers, and the general public. This is accomplished through the construction of a simple radio telescope kit and the use of a real-time radio observatory on the Internet. Our website (http://radiojove.gsfc.nasa.gov/) will contain science information, instruction manuals, observing guides, and education resources for students and teachers. Our target audience is high school science classes, but subjects can be tailored to college undergraduate physics and astronomy courses or even to middle school science classes. The goals of the project are: 1) Educate people about planetary and solar radio astronomy, space physics, and the scientific method 2) Provide teachers and students with a hands-on radio astronomy exercise as a science curriculum support activity by building and using a simple radio telescope receiver/antenna kit 3) Create the first ever online radio observatory which provides real-time data for those with internet access 4) Allow interactions among participating schools by facilitating exchanges of ideas, data, and observing experiences. Our current funding will allow us to impact 100 schools by partially subsidizing their participation in the program. We expect to expand well beyond this number as publicity and general interest increase. Additional schools are welcome to fully participate, but we will not be able to subsidize their kit purchases. We hope to make a wide impact among the schools by advertising through appropriate newsletters, space grant consortia, the INSPIRE project (http://image.gsfc.nasa.gov/poetry/inspire/), electronic links, and science and education meetings. We would like to acknoledge support from the NASA/GSFC Director's Discretionary Fund, the STScI IDEAS grant program and the NASA/GSFC Space Science Data Operations Office.

Garcia, L.; Thieman, J.; Higgins, C.

1999-09-01

28

Industrial interference and radio astronomy  

NASA Astrophysics Data System (ADS)

The interferer - victim scenario is described for the case of industrial interference affecting radio astronomical observatories. The sensitivity of radio astronomical receivers and their interference limits are outlined. EMC above 30 MHz is a serious problem for Radio Astronomy. Interferer (CISPR) and victim (ITU-R RA 769) standards are not harmonised. The emissions from the interferer and their spectral characteristics are not defined sufficiently well by CISPR standards. The required minimum coupling losses (MCL) between an industrial device and radio astronomical antenna depends on device properties but is shown to exceed 140 dB in most cases. Spatial separation of a few km is insufficient on its own, the terrain must shield > 30-40 dB, additional mitigations such as extra shielding or suppression of high frequency emissions may be necessary. A case by case compatibility analysis and tailored EMC measures are required for individual installations. Aggregation of many weak rfi emitters can become serious problem. If deployment densities are high enough, the emission constraints can even exceed those for a single interferer at a short distance from the radio observatory. Compatibility studies must account not only for the single interferer but also for many widely distributed interference sources.

Jessner, A.

2013-07-01

29

Large Instrument Development for Radio Astronomy  

NASA Astrophysics Data System (ADS)

This white paper offers cautionary observations about the planning and development of new, large radio astronomy instruments. Complexity is a strong cost driver so every effort should be made to assign differing science requirements to different instruments and probably different sites. The appeal of shared resources is generally not realized in practice and can often be counterproductive. Instrument optimization is much more difficult with longer lists of requirements, and the development process is longer and less efficient. More complex instruments are necessarily further behind the technology state of the art because of longer development times. Including technology R&D in the construction phase of projects is a growing trend that leads to higher risks, cost overruns, schedule delays, and project de-scoping. There are no technology breakthroughs just over the horizon that will suddenly bring down the cost of collecting area. Advances come largely through careful attention to detail in the adoption of new technology provided by industry and the commercial market. Radio astronomy instrumentation has a very bright future, but a vigorous long-term R&D program not tied directly to specific projects needs to be restored, fostered, and preserved.

Fisher, J. Richard; Warnick, Karl F.; Jeffs, Brian D.; Norrod, Roger D.; Lockman, Felix J.; Cordes, James M.; Giovanelli, Riccardo

30

Goldstone Apple Valley Radio Telescope Project.  

ERIC Educational Resources Information Center

Describes the Goldstone Apple Valley Radio Telescope (GAVRT) project as a way of teaching astronomy concepts to middle school students. The project provides students opportunities to work with professional scientists. (SOE)

Ibe, Mary; MacLaren, Dave

2003-01-01

31

Python Ephemeris Module for Radio Astronomy  

NASA Astrophysics Data System (ADS)

An extension of the Python pyephem module was developed for Deep Space Network (DSN) radio astronomy. The class DSS( ) provides the geodetic coordinates of the DSN stations as well as other properties such as antenna diameter. The class Quasar( ) provides positional data for the sources in the National Radio Astronomy Observatory Very Large Array (NRAO VLA) Calibrator Handbook and flux estimates based the University of Michigan Radio Astronomy Observatory (UMRAO) Database or the VLA Calibrator Handbook. Flux calibration data are also available for the bright planets. Class Pulsar( ) provides the data from the Australia Telescope National Facility (ATNF) Pulsar Catalogue in Python format.

Kuiper, T. B.

2013-05-01

32

Explorations in Radio Astronomy for High School Students  

Microsoft Academic Search

Few educational resources in Radio Astronomy are aimed at a high school audience. This rich field, however, utilizes several areas of physics studied at the secondary level, from interference and electromagnetism to relativity and geometry. During the summer, J. Bridger developed a series of web-based projects and hands-on explorations specifically targeted at secondary students. In addition, these projects were adapted

J. Bridger

2002-01-01

33

Introduction to special section on Mitigation of Radio Frequency Interference in Radio Astronomy  

E-print Network

Introduction to special section on Mitigation of Radio Frequency Interference in Radio Astronomy presented at the Workshop on the Mitigation of Radio Frequency Interference in Radio Astronomy (RFI2004), Introduction to special section on Mitigation of Radio Frequency Interference in Radio Astronomy, Radio Sci

Ellingson, Steven W.

34

The Astronomy Genealogy Project  

NASA Astrophysics Data System (ADS)

The Astronomy Genealogy Project, to be known as AstroGen, will list as many as possible of the world's astronomers with their academic parents (aka thesis advisors) and enable the reader to trace both academic ancestors and descendants. It will be very similar to the highly successful Mathematics Genealogy Project (MGP), available at http://genealogy.math.ndsu.nodak.edu. The MGP, which has been in operation since 1996, now contains the names of about 170,000 "mathematicians." These include many physicists and astronomers, as well as practitioners of related sciences. Mitchel Keller, the director of the MGP, has generously shared the software used in that project, and the American Astronomical Society (AAS) will host AstroGen, a project of the Historical Astronomy Division, on its website. We expect to start seeking entries soon, depending on the availability of computational assistance from the AAS IT department. We are seeking volunteers to help run the project. If you are interested, please contact me at joe.tenn@sonoma.edu.

Tenn, Joseph S.

2014-01-01

35

A Teaching Lab in Radio Astronomy  

ERIC Educational Resources Information Center

Describes a study in which participants in a summer institute for secondary science teachers performed a series of experiments with a radio telescope. Concludes that a radio astronomy teaching facility would encourage students to use their own initiative and strategy in working with the scientific concepts involved. (MLH)

Smith, Kirk R.; Cudaback, David D.

1976-01-01

36

National Radio Astronomy Observatory Electronics Division Technical Note No. 219  

E-print Network

of Arizona's 12 Meter (12-M) Telescope1 1 The 12-M Telescope at Kitt Peak is operated by the Arizona Radio1 National Radio Astronomy Observatory Electronics Division Technical Note No. 219 Measurements of Automotive Radar Emissions received by a Radio Astronomy Observatory Darrel Emerson (National Radio Astronomy

Groppi, Christopher

37

Grote Reber, Radio Astronomy Pioneer, Dies  

NASA Astrophysics Data System (ADS)

Grote Reber, one of the earliest pioneers of radio astronomy, died in Tasmania on December 20, just two days shy of his 91st birthday. Reber was the first person to build a radio telescope dedicated to astronomy, opening up a whole new "window" on the Universe that eventually produced such landmark discoveries as quasars, pulsars and the remnant "afterglow" of the Big Bang. His self- financed experiments laid the foundation for today's advanced radio-astronomy facilities. Grote Reber Grote Reber NRAO/AUI photo "Radio astronomy has changed profoundly our understanding of the Universe and has earned the Nobel Prize for several major contributions. All radio astronomers who have followed him owe Grote Reber a deep debt for his pioneering work," said Dr. Fred Lo, director of the National Radio Astronomy Observatory (NRAO). "Reber was the first to systematically study the sky by observing something other than visible light. This gave astronomy a whole new view of the Universe. The continuing importance of new ways of looking at the Universe is emphasized by this year's Nobel Prizes in physics, which recognized scientists who pioneered X-ray and neutrino observations," Lo added. Reber was a radio engineer and avid amateur "ham" radio operator in Wheaton, Illinois, in the 1930s when he read about Karl Jansky's 1932 discovery of natural radio emissions coming from outer space. As an amateur operator, Reber had won awards and communicated with other amateurs around the world, and later wrote that he had concluded "there were no more worlds to conquer" in radio. Learning of Jansky's discovery gave Reber a whole new challenge that he attacked with vigor. Analyzing the problem as an engineer, Reber concluded that what he needed was a parabolic-dish antenna, something quite uncommon in the 1930s. In 1937, using his own funds, he constructed a 31.4-foot-diameter dish antenna in his back yard. The strange contraption attracted curious attention from his neighbors and became something of a minor tourist attraction, he later recalled. Using electronics he designed and built that pushed the technical capabilities of the era, Reber succeeded in detecting "cosmic static" in 1939. In 1941, Reber produced the first radio map of the sky, based on a series of systematic observations. His radio-astronomy work continued over the next several years. Though not a professional scientist, his research results were published in a number of prestigious technical journals, including Nature, the Astrophysical Journal, the Proceedings of the Institute of Radio Engineers and the Journal of Geophysical Research. Reber also received a number of honors normally reserved for scientists professionally trained in astronomy, including the American Astronomical Society's Henry Norris Russell Lectureship and the Astronomical Society of the Pacific's Bruce Medal in 1962, the National Radio Astronomy Observatory's Jansky Lectureship in 1975, and the Royal Astronomical Society's Jackson-Gwilt Medal in 1983. Reber's original dish antenna now is on display at the National Radio Astronomy Observatory's site in Green Bank, West Virginia, where Reber worked in the late 1950s. All of his scientific papers and records as well as his personal and scientific correspondence are held by the NRAO, and will be exhibited in the observatory's planned new library in Charlottesville, Virginia. Reber's amateur-radio callsign, W9GFZ, is held by the NRAO Amateur Radio Club. This callsign was used on the air for the first time since the 1930s on August 25, 2000, to mark the dedication of the Robert C. Byrd Green Bank Telescope. The National Radio Astronomy Observatory is a facility of the National Science Foundation, operated under cooperative agreement by Associated Universities, Inc.

2002-12-01

38

The African Cultural Astronomy Project  

NASA Astrophysics Data System (ADS)

Indigenous, endogenous, traditional, or cultural astronomy focuses on the many ways that people and cultures interact with celestial bodies. In most parts of Africa, there is very little or no awareness about modern astronomy. However, like ancient people everywhere, Africans wondered at the sky and struggled to make sense of it. The African Cultural Astronomy Project aims to unearth the body of traditional knowledge of astronomy possessed by peoples of the different ethnic groups in Africa and to consider scientific interpretations when appropriate for cosmogonies and ancient astronomical practices. Regardless of scientific validity, every scientist can relate to the process of making observations and creating theoretical mechanisms for explaining what is observed. Through linking the traditional and the scientific, it is believed that this would be used to create awareness and interest in astronomy in most parts of Africa. This paper discusses the vision, challenges and prospects of the African Cultural Astronomy Project in her quest to popularize astronomy in Africa.

Urama, Johnson O.; Holbrook, Jarita C.

2011-06-01

39

Technology Advances for Radio Astronomy  

NASA Astrophysics Data System (ADS)

The field of radio astronomy continues to provide fundamental contributions to the understanding of the evolution, and inner workings of, our universe. It has done so from its humble beginnings, where single antennas and receivers were used for observation, to today's focal plane arrays and interferometers. The number of receiving elements (pixels) in these instruments is quickly growing, currently approaching one hundred. For the instruments of tomorrow, the number of receiving elements will be in the thousands. Such instruments will enable researchers to peer deeper into the fabric of our universe and do so at faster survey speeds. They will provide enormous capability, both for unraveling today's mysteries as well as for the discovery of new phenomena. Among other challenges, producing the large numbers of low-noise amplifiers required for these instruments will be no easy task. The work described in this thesis advances the state of the art in three critical areas, technological advancements necessary for the future design and manufacturing of thousands of low-noise amplifiers. These areas being: the automated, cryogenic, probing of diameter100 mm indium phosphide wafers; a system for measuring the noise parameters of devices at cryogenic temperatures; and the development of low-noise, silicon germanium amplifiers for terahertz mixer receivers. The four chapters that comprise the body of this work detail the background, design, assembly, and testing involved in these contributions. Also included is a brief survey of noise parameters, the knowledge of which is fundamental to the design of low-noise amplifiers and the optimization of the system noise temperature for large, dense, interferometers.

Russell, Damon Stuart

40

Teaching radio astronomy with Affordable Small Radio Telescope (ASRT)  

NASA Astrophysics Data System (ADS)

A simple, easy to build and portable radio telescope, called Affordable Small Radio Telescope (ASRT), has been developed by the Radio Physics Laboratory (RPL), a radio astronomy teaching unit associated with the National Centre for Radio Astrophysics (TIFR) and Inter-University Centre for Astronomy and Astrophysics (IUCAA), which are two premier astronomy institutes in India. ASRT consists of off-the-shelf available Direct to Home television dishes and is easy to assemble. Our design is scalable from simple very low cost telescope to more complex yet moderately costing instrument. ASRT provides a platform for demonstrating radio physics concepts through simple hands-on experiment as well as for carrying out solar monitoring by college/University students. The presentation will highlight the concept of ASRT and the different experiments that can be carried out using it. The solar monitoring observations will be discussed along-with details of methods for calibrating these measurements. The pedagogical usefulness of ASRT in introducing undergraduatephysics students to astrophysics, measurements and analysis methods used in radio astronomy will also be discussed. Use of ASRT in the last three years in the programs of RPL, namely the annual Radio Astronomy Winter School for College students (RAWSC) and Pulsar Observing for Students (POS) is also presented. This year a new program was initiated to form a virtual group of an ASRT community, which will not only share their measurements, but also think of improving the pedagogical usefulness of ASRT by innovative experiments. This initiative is presented with the best practices drawn from our experience in using ASRT as a tool for student training in space sciences. The talk will also point out future ideas in involving a larger body of students in simple radio astronomy experiments with the ASRT, which RPL is likely to nucleate as part of its mandate.

Joshi, Bhal Chandra

41

Radio Jove: Jupiter Radio Astronomy for Citizens  

NASA Astrophysics Data System (ADS)

Radio JOVE is a hands-on educational activity that brings the radio sounds of the Sun, Jupiter, the Milky Way Galaxy, and terrestrial radio noise to students, teachers, and the general public. Participants may build a simple radio telescope kit, make scientific observations, and interact with professional radio observatories in real-time over the Internet. Our website (http://radiojove.gsfc.nasa.gov) includes science information, construction manuals, observing guides, and education resources for teachers and students. Radio Jove is continually expanding its participants with over 1800 kits sold to more than 70 countries worldwide. Recently some of our most dedicated observers have upgraded their Radio Jove antennas to semi-professional observatories. We have spectrographs and wide band antennas, some with 8 MHz bandwidth and some with dual polarization capabilities. In an effort to add to the science literature, these observers are coordinating their efforts to pursue some basic questions about Jupiter’s radio emissions (radio source locations, spectral structure, long term changes, etc.). We can compare signal and ionosphere variations using the many Radio Jove observers at different locations. Observers are also working with members of the Long Wavelength Array Station 1 (LWA1) radio telescope to coordinate observations of Jupiter; Radio Jove is planning to make coordinated observations while the Juno Mission is active beginning in 2015. The Radio Jove program is overviewed, its hardware and software are highlighted, recent sample observations are shown, and we demonstrate that we are capable of real citizen science.

Higgins, Charles; Thieman, J. R.; Flagg, R.; Reyes, F. J.; Sky, J.; Greenman, W.; Brown, J.; Typinski, D.; Ashcraft, T.; Mount, A.

2014-01-01

42

47 CFR 2.107 - Radio astronomy station notification.  

Code of Federal Regulations, 2012 CFR

...2012-10-01 2012-10-01 false Radio astronomy station notification. 2...COMMISSION GENERAL FREQUENCY ALLOCATIONS AND RADIO TREATY MATTERS; GENERAL RULES AND REGULATIONS Allocation, Assignment, and Use of Radio Frequencies § 2.107 Radio...

2012-10-01

43

47 CFR 2.107 - Radio astronomy station notification.  

Code of Federal Regulations, 2014 CFR

...2014-10-01 2014-10-01 false Radio astronomy station notification. 2...COMMISSION GENERAL FREQUENCY ALLOCATIONS AND RADIO TREATY MATTERS; GENERAL RULES AND REGULATIONS Allocation, Assignment, and Use of Radio Frequencies § 2.107 Radio...

2014-10-01

44

47 CFR 2.107 - Radio astronomy station notification.  

Code of Federal Regulations, 2013 CFR

...2013-10-01 2013-10-01 false Radio astronomy station notification. 2...COMMISSION GENERAL FREQUENCY ALLOCATIONS AND RADIO TREATY MATTERS; GENERAL RULES AND REGULATIONS Allocation, Assignment, and Use of Radio Frequencies § 2.107 Radio...

2013-10-01

45

47 CFR 2.107 - Radio astronomy station notification.  

Code of Federal Regulations, 2011 CFR

...2011-10-01 2011-10-01 false Radio astronomy station notification. 2...COMMISSION GENERAL FREQUENCY ALLOCATIONS AND RADIO TREATY MATTERS; GENERAL RULES AND REGULATIONS Allocation, Assignment, and Use of Radio Frequencies § 2.107 Radio...

2011-10-01

46

47 CFR 2.107 - Radio astronomy station notification.  

Code of Federal Regulations, 2010 CFR

...2010-10-01 2010-10-01 false Radio astronomy station notification. 2...COMMISSION GENERAL FREQUENCY ALLOCATIONS AND RADIO TREATY MATTERS; GENERAL RULES AND REGULATIONS Allocation, Assignment, and Use of Radio Frequencies § 2.107 Radio...

2010-10-01

47

Genesis of Radio Astronomy at BYU  

NASA Astrophysics Data System (ADS)

We are beginning a new program in state-of-the-art radio astronomy at BYU. Our first effort consists of a 4-meter radio antenna designed to image hydrogen spin-flip and maser lines within our galaxy where frequencies of interest include 1.4GHz -- 1.6GHz. We employ a unique spectrometer/correllator that may be used both independently as well as in conjunction with a 5-antenna array for imaging. Our correlator/spectrometer is based upon CASPER hardware/firmware, as used at leading edge radio astronomy sites at JPL, Harvard, Deep Space Network, et al. This instrument system, to be followed by others, establishes a foundation for physics and astronomy research and teaching using state-of-the-art methods.

Blakley, Daniel

2010-10-01

48

PARTNeR for Teaching and Learning Radio Astronomy Basics  

NASA Astrophysics Data System (ADS)

NASA has three satellite tracking stations around the world: CDSCC (Canberra, Australia), GDSCC (Goldstone, USA) and MDSCC (Madrid, Spain). One of the antennas located at MDSCC, DSS-61, is not used for satellite tracking any more and thanks to an agreement between INTA (Instituto Nacional de TA~l'cnica Aeroespacial) and NASA, it has been turned into an educational radio telescope. PARTNeR (Proyecto Académico con el RadioTelescopio de NASA en Robledo, Academic Project with the NASA Radio Telescope at Robledo) is a High School and University radio astronomy educational program that allows teachers and students to control this 34-meter radio telescope and conduct radio astronomical observations via the Internet. As radio astronomy is not a popular subject and astronomy has little presence in the High School Curriculum, teachers need specific training in those subjects to implement PARTNeR. Thus, High School teachers joining the project take a course to learn about the science of radio astronomy and how to use the antenna in their classrooms. Also, teachers are provided with some learning activities they can do with their students. These lesson plans are focused on the implementation of the project within an interdisciplinary framework. All educational resources are available on PARTNeR website. PARTNeR is an inquiry based approach to science education. Nowadays, students can join in three different observational programmes: variability studies in quasars, studies of radio-bursts in X-ray binaries (microquasars), and mapping of radio sources in the galactic plane. Nevertheless, any other project can be held after an evaluation by the scientific committee. The operational phase of the project started in the academic year 2003-04. Since then, 85 High Schools, seven Universities and six societies of amateur astronomers have been involved in the project. During the 2004-09 period, 103 High School teachers from Spain and Portugal have attended the training courses, and 105 radio astronomical remote observations have been performed with users. Until now, more than 2,000 students have been involved in radio astronomical observations.

Vaquerizo, Juan Ángel

2010-10-01

49

National Radio Astronomy Observatory Socorro, NM 87801  

E-print Network

National Radio Astronomy Observatory Socorro, NM 87801 EVLA Memorandum 41 Lightning Protection protection. A major concern of this type of installation is the susceptibility of the cable to lightning reliable indication of the need for lightning protection on a particular cable route is a history

Groppi, Christopher

50

Three Radio Astronomy Futures: ALMA, EVLA, SKA  

E-print Network

astronomical telescope #12;NRAO Technology Center Radio Astronomy technology & signal processing push state Collaboration with Canada and Mexico Implements state-of-the-art technology Correlator wideband receivers: 1, Chile #12;To AOS (43km) OSF Site (15km) Operations Support Facility & Array Operations Site #12;ALMA

Groppi, Christopher

51

A Virtual Tour of the Radio Astronomy Process  

NASA Astrophysics Data System (ADS)

In the summer of 2000, two teachers working on a Masters of Science Teaching Degree at New Mexico Tech and participating in the Research Experience for Teachers (RET) program sponsored by the National Science Foundation, spent eight weeks as interns researching and working on projects at the National Radio Astronomy Observatory (NRAO) which will directly benefit students in their classrooms and also impact other science educators. One of the products of the interships is a set of web pages for NRAO's web page educational section. The purpose of these web pages is to familiarize students, teachers, and other people with the process that a radio astronomer goes through to do radio astronomy science. A virtual web tour was created of this process. This required interviewing radio astronomers and other professionals involved with this process at the NRAO (e.g. engineers, data analysts, and operations people), and synthesizing the interviews into a descriptive, visual-based set of web pages. These pages do meet the National as well as New Mexico Standards and Benchmarks for Science Education. The National Radio Astronomy Observatory is a facility of the National Science Foundation, operated under cooperative agreement by Associated Universities, Inc. The NSF's RET program is gratefully acknowledged.

Conrad, S. B.; Finley, D. G.; Claussen, M. J.; Ulvestad, J. S.

2000-12-01

52

Tools for teaching radio-astronomy  

NASA Astrophysics Data System (ADS)

In 2011, the worldwide radiotelescope ALMA (Atacama Large Millimeter Array) has started preliminary operations. Radio-astronomy is thus entering a new golden age, a fantastic opportunity for widening formal and informal educational training and public involvement, for making a science impact on young people. The EU-HOU consortium has developed a small radiotelescope network (6 antenna) spread over Europe and directly accessible from the web via a remote control interface. These antenna are mostly dedicated to high school teachers in the context of the COMENIUS European commission Lifelong Learning Program: ``Connecting classrooms to the Milky-Way''. However, such small antenna can also be used to teach at University and introduce students to radio-astronomy principles.

Salomé, P.; Radiguet, A.; Albert, B.; Batrung, M.; Caillat, M.; Gheudin, M.; Libert, Y.; Ferlet, R.; Maestrini, A.; Melchior, A.-L.; Munier, J.-M.; Rudolph, A.

2012-12-01

53

Spectrum quietness metrics for radio astronomy  

NASA Astrophysics Data System (ADS)

We review metrics to assess the radio quietness of sites used for radio astronomy. Concise metrics are needed to compare candidate sites for new telescopes, to monitor the quality of existing sites, and to design telescopes to work well at a given site. Key points of assessment are the receiver dynamic range required for the strongest interferers and the expected fraction of spectrum available for sensitive astronomical measurements. We propose three metrics: (1) total radio frequency interference power, (2) interference-to-noise power ratio and (3) timefrequency occupancy. Box plots of these metrics summarise large quantities of information, highlight expected ranges of interfering signal properties, and aid comparisons of sites and other factors of interest. We provide examples for Square Kilometre Array phase one deployment in Australia based on measurements made for the selection of this site. The Square Kilometre Array will be the largest radio telescope in the world.

Chippendale, Aaron; Wormnes, Kjetil

2013-05-01

54

Radio astronomy Explorer B antenna aspect processor  

NASA Technical Reports Server (NTRS)

The antenna aspect system used on the Radio Astronomy Explorer B spacecraft is described. This system consists of two facsimile cameras, a data encoder, and a data processor. Emphasis is placed on the discussion of the data processor, which contains a data compressor and a source encoder. With this compression scheme a compression ratio of 8 is achieved on a typical line of camera data. These compressed data are then convolutionally encoded.

Miller, W. H.; Novello, J.; Reeves, C. C.

1972-01-01

55

Planetary radio astronomy observations from Voyager 1 near Saturn  

Microsoft Academic Search

The Voyager 1 planetary radio astronomy experiment detected two distinct kinds of radio emissions from Saturn. The first, Saturn kilometric radiation, is strongly polarized, bursty, tightly correlated with Saturn's rotation, and exhibits complex dynamic spectral features somewhat reminiscent of those in Jupiter's radio emission. It appears in radio frequencies below about 1.2 megahertz. The second kind of radio emission, Saturn

J. W. Warwick; J. B. Pearce; D. R. Evans; T. D. Carr; J. J. Schauble; J. K. Alexander; M. L. Kaiser; M. D. Desch; M. Pedersen; A. Lecacheux; G. Daigne; A. Boischot; C. H. Barrow

1981-01-01

56

Auto-Adaptive Radio Astronomy Instruments  

NASA Astrophysics Data System (ADS)

Progress in the field of radio astronomy depends heavily on advances in instrumental capabilities, characterized by properties such as collecting area, resolution in the angular, spectral and temporal domains, field of view, and spatial aperture sampling. Generally, such advances in capability represent increases in the formal quantity of astronomical information that is received and processed by the instrument. The current generation of radio astronomy arrays can generate antenna voltage data at rates of Tbits per second, and forthcoming instruments will quickly expand these rates by multiple orders of magnitude. Future Exascale systems will have to make many choices on how to process subsets of big data. As human capacity will be overwhelmed at this scale, part of the discovery process will have to be handled by algorithms and machines. A key challenge will be to identify patterns of scientific significance in massive data sets and adjust instruments to become more sensitive to such patterns. As a step towards realization, we will revisit the current data collection and analysis pipelines from a fresh perspective that treats them as one system. In this system, multicore parallelism reduces big data accumulation by moving fragments of analysis and filtering closer to the data acquisition. MIT Haystack is pursuing approaches that enable future scientists to shift their interaction with bare metal instruments to steering search algorithms. Our vision is to create auto-adaptive instruments that can automatically adjust to identify and characterize interesting data patterns and properties, to optimize signal to noise ratios, and balance the search process depending on environmental changes. Bios Victor Pankratius is a principal investigator and computer scientist at MIT Haystack Observatory, where he advances new directions of computing in astronomy. Contact him at [pankrat at mit dot edu], victorpankratius.com, or Twitter @vpankratius. Colin Lonsdale is Director of the MIT Haystack Observatory, and has a 30-year background in observational radio astronomy and interferometric imaging. His email is [cjl at haystack dot mit dot edu].

Pankratius, Victor; Lonsdale, C. J.

2014-04-01

57

International Agreement Will Advance Radio Astronomy  

NASA Astrophysics Data System (ADS)

Two of the world's leading astronomical institutions have formalized an agreement to cooperate on joint efforts for the technical and scientific advancement of radio astronomy. The National Radio Astronomy Observatory (NRAO) in the United States and the Max-Planck Institute for Radioastronomy (MPIfR) in Germany concluded a Memorandum of Understanding outlining planned collaborative efforts to enhance the capabilities of each other's telescopes and to expand their cooperation in scientific research. The VLBA The VLBA CREDIT: NRAO/AUI/NSF In the first project pursued under this agreement, the MPIfR will contribute $299,000 to upgrade the continent-wide Very Long Baseline Array's (VLBA) capability to receive radio emissions at a frequency of 22 GHz. This improvement will enhance the VLBA's scientific productivity and will be particularly important for cutting-edge research in cosmology and enigmatic cosmic objects such as gamma-ray blazars. "This agreement follows many years of cooperation between our institutions and recognizes the importance of international collaboration for the future of astronomical research," said Fred K.Y. Lo, NRAO Director. "Our two institutions have many common research goals, and joining forces to keep all our telescopes at the forefront of technology will be highly beneficial for the science," said Anton Zensus, Director at MPIfR. In addition to the VLBA, the NRAO operates the Very Large Array (VLA) in New Mexico and the Robert C. Byrd Green Bank Telescope (GBT) in West Virginia. The MPIfR operates the 100-meter Effelsberg Radio Telescope in Germany and the 12-meter APEX submillimeter telescope in 5100 m altitude in the Cilean Atacama desert (together with the European Southern Observatory and the Swedish Onsala Space Observatory). With the 100-meter telescope, it is part of the VLBA network in providing transatlantic baselines. Both institutions are members of a global network of telescopes (the Global VLBI Network) that uses simultaneous observations to produce extremely high-resolution images, and another network (the High Sensitivity Array) that uses the same technique with large telescopes to observe particularly faint celestial objects. With this technique, NRAO telescopes work with MPIfR's Effelsberg telescope to produce images hundreds of times more detailed than those from the Hubble Space Telescope. Both institutions also are part of the international collaboration building the Atacama Large Millimeter/submillimeter Array (ALMA) in Chile and of the international planning effort to build a Square Kilometer Array. The VLBA is a system of ten antennas, each with a dish 25 meters in diameter. From Mauna Kea on the Big Island of Hawaii to St. Croix in the U.S. Virgin Islands, the VLBA spans more than 8000 kilometers. Under the new agreement, the two institutions will continue their previous observational collaborations, and in addition will share resources to improve the technical capabilities of each other's telescopes, particularly at short wavelengths, They also will collaborate in the peer-reviewed process each uses to allocate observing time, and agree to mutually maintain an "open skies" policy allowing open access to each other's telescopes on a peer-reviewed basis. The agreement notes the report of the U.S. National Science Foundation's (NSF) Senior Review committee, which called upon the NRAO to seek partners to contribute to the operation of the VLBA. The MPIfR affirms its strong interest in maintaining the VLBA's unique scientific capabilities, and its monetary contribution toward the 22 GHz upgrade of the VLBA is a solid sign of that commitment. "The VLBA provides the greatest resolving power of any instrument in astronomy, and the MPIfR's contribution to enhancing its capabilities is an important validation of the VLBA's importance to frontier astrophysics," Lo said. The joint VLBA project calls for the MPIfR to fund the receiving-system upgrades and the NRAO to perform the work. The project is scheduled to be complete, with all 10 VLBA an

2007-12-01

58

Relationships Between Star Size, Radio Wave Emissions, and Dust Stellar Astronomy and Radio Emissions  

Microsoft Academic Search

Radio astronomy is a branch of astronomy that deals with radio emissions from celestial objects. Hydrogen is an abundant element that makes up much of the universe. Neutral Hydrogen, found in many parts of the sky, emits radio emissions at a frequency of 1420MHz as its protons fall into lower energy levels. Through the use of a radio telescope, one

Parth Sehgal; Julian Trent; Adam Susaneck; Matt Robinson

59

Adventures in Radio Astronomy Instrumentation and Signal Processing  

E-print Network

#12;Abstract This thesis describes the design and implementation of several instruments for digi Antenna Radio Astronomy . . . . . . . . . . . . . . . . . . . . 8 2.2.1 Radio Telescope Arrays . . . . . . . . . . . . . . . . . . . . . 36 ii #12;3.5 Observing Software . . . . . . . . . . . . . . . . . . . . . . . . . . . . 40 3

California at Berkeley, University of

60

The Importance of Site Selection for Radio Astronomy  

NASA Astrophysics Data System (ADS)

Radio sources are very weak since this object travel very far from outer space. Radio astronomy studies are limited due to radio frequency interference (RFI) that is made by man. If the harassment is not stopped, it will provide critical problems in their radio astronomy scientists research. The purpose of this study is to provide RFI map Peninsular Malaysia with a minimum mapping techniques RFI interference. RFI mapping technique using GIS is proposed as a tool in mapping techniques. Decision-making process for the selection requires gathering information from a variety of parameters. These factors affecting the selection process are also taken account. In this study, various factors or parameters involved such as availability of telecommunications transmission (including radio and television), rainfall, water line and human activity. This study will benefit radio astronomy research especially in the RFI profile in Malaysia. Keywords: Radio Astronomy, Radio Frequency Interference (RFI), RFI mapping technique : GIS.

Umar, Roslan; Zainal Abidin, Zamri; Abidin Ibrahim, Zainol

2014-10-01

61

Data Intensive Radio Astronomy en route to the SKA: The Rise of Big Radio Data  

NASA Astrophysics Data System (ADS)

Advances in both digital processing devices and in technologies to sample the focal and aperture planes of radio antennas is enabling observations of the radio sky with high spectral and spatial resolution combined with large bandwidth and field of view. As a consequence, survey mode radio astronomy generating vast amounts of data and involving globally distributed collaborations is fast becoming a primary tool for scientific advance. The Square Kilometre Array (SKA) will open up a new frontier in data intensive astronomy. Within the next few years SKA precursor telescopes will demonstrate new technologies and take the first major steps toward the SKA. Projects that path find the scientific journey to the SKA with these and other telescopes are currently underway and being planned. The associated exponential growth in data require us to explore new methodologies for collaborative end-to-end execution of data intensive observing programs.

Taylor, A. R.

2015-03-01

62

Explorations in Radio Astronomy for High School Students  

NASA Astrophysics Data System (ADS)

Few educational resources in Radio Astronomy are aimed at a high school audience. This rich field, however, utilizes several areas of physics studied at the secondary level, from interference and electromagnetism to relativity and geometry. During the summer, J. Bridger developed a series of web-based projects and hands-on explorations specifically targeted at secondary students. In addition, these projects were adapted into designs for exhibits for a modern visitor center at the Very Large Array. The projects developed emphasize interactive, exploratory investigation as a means to conceptual understanding. Multi-antenna interferometry is modeled using microphones and parabolic dishes, and many astronomical phenomena (AGN and Gravitational Lensing) are simulated using simple inexpensive classroom materials. In addition, many projects were developed that enable students to use sky survey data to develop long-term original research projects, emphasizing the value of multi-wavelength observation. The final project, developed as a web page, also includes sections on history, modern research and interferometry theory. The site will be accessible from the NRAO site and can serve as a general secondary resource for teachers wishing to incorporate a Radio Astronomy unit into their science curriculum.

Bridger, J.

2002-12-01

63

NATIONAL RADIO ASTRONOMY OBSERVATORY Green, Bank, West Virginia  

E-print Network

NATIONAL RADIO ASTRONOMY OBSERVATORY Green, Bank, West Virginia Electronics Division Internal Rep preformed by the Standard Receiver Section of the National Radio Astronomy Observatory at Green Bank, West panel PA1102HG 1.42 2 Cambion handles 1252-1 1.82 1 Cinch barrier strip 5-141-Y .68 1 Gremar connector

Groppi, Christopher

64

Radio Astronomy in Malaysia: Current Status and Outreach Activities  

NASA Astrophysics Data System (ADS)

In this paper, we will present the current status of radio astronomical research and outreach in Malaysia. We will also present a short history of our research group, which is currently the only radio astronomical facility in Malaysia. Our group is called the Radio Cosmology Research Lab and was established in 2005 by Dr Zamri Zainal Abidin and Prof Dr Zainol Abidin Ibrahim. We will discuss the future plans for this group including our keen interest in being part of a more global network of radio astronomers. We are already an active member of the South-East Asia Astronomy Network (SEAAN) and aims to have a radio astronomical facility in order to join the Global Very Long Baseline Interferometer (VLBI) as well becoming a research hub for the future Square Kilometer Array (SKA) project. We will also present some of the scientific goals of our group including providing a platform for radio astronomers to be able to do observations of weak and high red-shifted radio objects such as galaxy clusters and supernovae.

Hashim, N.; Abidin, Z. Z.; Ibrahim, U. F. S. U.; Umar, R.; Hassan, M. S. R.; Rosli, Z.; Hamidi, Z. S.; Ibrahim, Z. A.

2011-12-01

65

BROAD BAND ANTENNA ARRAYS AND NOISE COUPLING FOR RADIO ASTRONOMY  

E-print Network

Zoya Popovi´c In radio astronomy radio telescopes that use large spherical or parabolic reflector, which makes the antennas expensive to build and maintain. A next generation radio telescope that uses. There are several advantages to a phased array radio telescope, as well as some potential difficulties that arise

Popovic, Zoya

66

Astronomy Education Project for Guangdong High Schools  

NASA Astrophysics Data System (ADS)

Guangdong province is an active area in China for astronomy education and popularization. The current status and problems of astronomy education in high schools are reviewed. To tackle these problems, an astronomy education project for high school teachers and students was initiated by Guangzhou University in 2013. The purpose and key points of the projects are introduced in this paper.

Pi, F. P.; Guan, K. Y.; Wang, J.; Wang, H. G.; Liu, Y.; Fan, J. H.

2014-09-01

67

JPL Big Data Technologies for Radio Astronomy  

NASA Astrophysics Data System (ADS)

During the past three years the Jet Propulsion Laboratory has been working on several technologies to deal with big data challenges facing next-generation radio arrays, among other applications. This program has focused on the following four areas: 1) We are investigating high-level ASIC architectures that reduce power consumption for cross-correlation of data from large interferometer arrays by one to two orders of magnitude. The cost of operations for the Square Kilometre Array (SKA), which may be dominated by the cost of power for data processing, is a serious concern. A large improvement in correlator power efficiency could have a major positive impact. 2) Data-adaptive algorithms (machine learning) for real-time detection and classification of fast transient signals in high volume data streams are being developed and demonstrated. Studies of the dynamic universe, particularly searches for fast (<< 1 second) transient events, require that data be analyzed rapidly and with robust RFI rejection. JPL, in collaboration with the International Center for Radio Astronomy Research in Australia, has developed a fast transient search system for eventual deployment on ASKAP. In addition, a real-time transient detection experiment is now running continuously and commensally on NRAO's Very Long Baseline Array. 3) Scalable frameworks for data archiving, mining, and distribution are being applied to radio astronomy. A set of powerful open-source Object Oriented Data Technology (OODT) tools is now available through Apache. OODT was developed at JPL for Earth science data archives, but it is proving to be useful for radio astronomy, planetary science, health care, Earth climate, and other large-scale archives. 4) We are creating automated, event-driven data visualization tools that can be used to extract information from a wide range of complex data sets. Visualization of complex data can be improved through algorithms that detect events or features of interest and autonomously generate images or video to display those features. This work has been carried out at the Jet Propulsion Laboratory, California Institute of Technology, under contract with the National Aeronautics and Space Administration.

Jones, Dayton L.; D'Addario, L. R.; De Jong, E. M.; Mattmann, C. A.; Rebbapragada, U. D.; Thompson, D. R.; Wagstaff, K.

2014-04-01

68

The Harvard Radio Astronomy Station at Fort Davis, Texas  

NASA Astrophysics Data System (ADS)

The Harvard Radio Astronomy Station at Fort Davis, Texas, came into operation in 1956 as a radio extension of the U.S. Air Force Sacramento Peak Observatory. The location near Fort Davis was chosen for the low level of man-made radio signals. Initially the receiving equipment at the site included a 28-ft diameter antenna and covered the range 100-580 MHz. The receivers swept through this band approximately three times per second, recording the spectrum of solar radio activity. In subsequent years the frequency range was extended to cover all or parts of 10 MHz to 4 GHz. All recorded solar bursts were identified according to five principal spectral types, and lists including times, durations, and frequency ranges of all solar activity were published. Studies of the bursts included analyses of their relationships to flares and other optical solar phenomena, and also their relationships to geophysical phenomena, including magnetic storms and polar blackouts. An 85-ft diameter antenna was installed in 1963, which during 1970-1974 was used for solar observations in the range 580 MHz to 4 GHz. Otherwise this antenna was used for non-solar radio astronomy, including lunar occultations of radio sources, measurements of flux densities at 5 GHz, investigations of the Galactic Center, and similar projects. The solar program was closed in late 1982 after 26 years of continuous operation. After 1974 the 85-ft antenna was used mainly in a program of VLBI network observations conducted by astronomers from Caltech and NRAO. In 1991 it was replaced by an antenna of the VLBA program of the NRAO. This paper describes some details of the antennas and receivers, and results of the solar studies. It also includes a brief discussion of the non-solar observations other than the VLBI program.

Thompson, A. Richard

2010-03-01

69

Astronomy research at the Aerospace Corporation. [research projects - NASA programs  

NASA Technical Reports Server (NTRS)

This report reviews the astronomy research carried out at The Aerospace Corporation during 1974. The report describes the activities of the San Fernando Observatory, the research in millimeter wave radio astronomy as well as the space astronomy research.

Paulikas, G. A.

1974-01-01

70

Olfar orbiting low frequency antenna for radio astronomy  

Microsoft Academic Search

New interesting astronomical science drivers for very low frequency radio astronomy have emerged, ranging from studies of the astronomical dark ages, the epoch of reionization, exoplanets, to ultra-high energy cosmic rays. However, astronomical observations with Earth-bound radio telescopes at very low frequencies are hampered by the ionospheric plasma, which scatters impinging celestial radio waves. This effect is larger at lower

Mark Bentum; Albert Jan Boonstra

2009-01-01

71

47 CFR 5.91 - Notification of the National Radio Astronomy Observatory.  

Code of Federal Regulations, 2011 CFR

... false Notification of the National Radio Astronomy Observatory. 5.91 Section...COMMUNICATIONS COMMISSION GENERAL EXPERIMENTAL RADIO SERVICE (OTHER THAN BROADCAST) Applications...5.91 Notification of the National Radio Astronomy Observatory. In...

2011-10-01

72

47 CFR 5.91 - Notification to the National Radio Astronomy Observatory.  

Code of Federal Regulations, 2013 CFR

... false Notification to the National Radio Astronomy Observatory. 5.91 Section...COMMUNICATIONS COMMISSION GENERAL EXPERIMENTAL RADIO SERVICE Applications and Licenses § 5.91 Notification to the National Radio Astronomy Observatory. In...

2013-10-01

73

47 CFR 5.91 - Notification to the National Radio Astronomy Observatory.  

Code of Federal Regulations, 2014 CFR

... false Notification to the National Radio Astronomy Observatory. 5.91 Section...COMMUNICATIONS COMMISSION GENERAL EXPERIMENTAL RADIO SERVICE Applications and Licenses § 5.91 Notification to the National Radio Astronomy Observatory. In...

2014-10-01

74

47 CFR 5.91 - Notification of the National Radio Astronomy Observatory.  

Code of Federal Regulations, 2012 CFR

... false Notification of the National Radio Astronomy Observatory. 5.91 Section...COMMUNICATIONS COMMISSION GENERAL EXPERIMENTAL RADIO SERVICE (OTHER THAN BROADCAST) Applications...5.91 Notification of the National Radio Astronomy Observatory. In...

2012-10-01

75

47 CFR 5.91 - Notification of the National Radio Astronomy Observatory.  

Code of Federal Regulations, 2010 CFR

... false Notification of the National Radio Astronomy Observatory. 5.91 Section...COMMUNICATIONS COMMISSION GENERAL EXPERIMENTAL RADIO SERVICE (OTHER THAN BROADCAST) Applications...5.91 Notification of the National Radio Astronomy Observatory. In...

2010-10-01

76

Scott M. Ransom National Radio Astronomy Observatory / Univ. of Virginia  

E-print Network

at the University of Virginia where he has several graduate students and teaches the occasional graduate class. HeScott M. Ransom Astronomer National Radio Astronomy Observatory / Univ. of Virginia Scott

Groppi, Christopher

77

Low Frequency Radio Astronomy with the existing and future radio telescopes  

E-print Network

Low Frequency Radio Astronomy with the existing and future radio telescopes A.A. Konovalenko radio telescope and also the creation of new large telescope of 10 ­ 70 MHz frequency range, Emmen, "Astrophisycs in the LOFAR era") #12;#12;#12;The low-frequency radio telescopes in Europe LOFAR

Demoulin, Pascal

78

The Advancement of Radio Astronomy at Brigham Young University  

NASA Astrophysics Data System (ADS)

We are presenting on the status and future plans of the radio astronomy project at Brigham Young University. The Physics and Astronomy department and the West Mountain Observatory already have optical facilities that offer students the opportunity to observe in the optical and NIR, but not at any other wavelengths. An array is being built to allow students to obtain data in the radio spectrum. The array is being built around the already operational 4 meter dish on top of the Eyring Science Center and will eventually contain baselines up to 8 km and a 10 m dish. We currently have selected the four sites for additional baselines. The array initially will be ready to observe HI at 1420 MHz and the OH MASER lines at 1665 MHz and 1667 MHz. We present preliminary spectra in L-band (21-18cm) with the 4 meter dish. The system will be using LNA's for signal amplification and will have digital correlation and spectral analysis through CASPER. The system is locked to a rubidium clock with a GPS master. In the future, we hope to extend the frequency coverage to C-band (5 GHz).

Honick, Charles; Migenes, V.; Blakley, D.

2014-01-01

79

Using Group Research Projects to Stimulate Undergraduate Astronomy Major Learning  

NASA Astrophysics Data System (ADS)

The University of Arizona Astronomy Club has been working on two large group research projects since 2009. One research project is a transiting extrasolar planet project that is fully student led and run. We observed the transiting exoplanets, TrES-3b and TrES-4b, with the 1.55 meter Kupier Telescope in near-UV and optical filters in order to detect any asymmetries between filters. The second project is a radio astronomy survey utilizing the Arizona Radio Observatory 12m telescope on Kitt Peak to study molecular gas in cold cores identified by the Planck all sky survey. This project provides a unique opportunity for a large group of students to get hands-on experience observing with a world-class radio observatory. These projects involve students in every single step of the process including: proposal writing to obtain telescope time on various Southern Arizona telescopes, observing at these telescopes, data reduction and analysis, managing large data sets, and presenting results at scientific meetings and in journal publications. The primary goal of these projects is to involve students in cutting-edge research early on in their undergraduate studies. The projects are designed to be continuous long term projects so that new students can easily join. As of January 2012 the extrasolar planet project became an official independent study class. New students learn from the more experienced students on the projects creating a learner-centered environment.

McGraw, Allison M.; Hardegree-Ullman, K. K.; Turner, J. D.; Shirley, Y. L.; Walker-LaFollette, A. M.; Robertson, A. N.; Carleton, T. M.; Smart, B. M.; Towner, A. P. M.; Wallace, S. C.; Smith, C. W.; Small, L. C.; Daugherty, M. J.; Guvenen, B. C.; Crawford, B. E.; Austin, C. L.; Schlingman, W. M.

2012-05-01

80

Adventures in Radio Astronomy Instrumentation and Signal Processing  

E-print Network

arXiv:1109.0416v1[astro-ph.IM]2Sep2011 #12;Abstract This thesis describes the design Antenna Radio Astronomy . . . . . . . . . . . . . . . . . . . . 8 2.2.1 Radio Telescope Arrays . . . . . . . . . . . . . . . . . . . . . 36 ii #12;3.5 Observing Software . . . . . . . . . . . . . . . . . . . . . . . . . . . . 40 3

Masci, Frank

81

Planetary radio astronomy observations from Voyager 1 near Saturn  

NASA Technical Reports Server (NTRS)

The Voyager 1 planetary radio astronomy experiment detected two distinct kinds of radio emissions from Saturn. The first, Saturn kilometric radiation, is strongly polarized, bursty, tightly correlated with Saturn's rotation, and exhibits complex dynamic spectral features somewhat reminiscent of those in Jupiter's radio emission. It appears in radio frequencies below about 1.2 megahertz. The second kind of radio emission, Saturn electrostatic discharge, is unpolarized, extremely impulsive, loosely correlated with Saturn's rotation, and very broadband, appearing throughout the observing range of the experiment (20.4 kilohertz to 40.2 megahertz). Its sources appear to lie in the planetary rings.

Warwick, J. W.; Pearce, J. B.; Evans, D. R.; Carr, T. D.; Schauble, J. J.; Alexander, J. K.; Kaiser, M. L.; Desch, M. D.; Pedersen, M.; Lecacheux, A.

1981-01-01

82

Figure 1: ATA 42 antenna array at Hat Creek ********ADAPTIVE REAL TIME IMAGING FOR RADIO ASTRONOMY*******  

E-print Network

Figure 1: ATA 42 antenna array at Hat Creek ********ADAPTIVE REAL TIME IMAGING FOR RADIO ASTRONOMY --------------------------­ · Astronomers primarily interested in astronomy. ­ Data reduction preoccupies radio astronomy specialists,f,p Bandpass( )f PolCal( )f,p Gains( )s,f,p S Beam Imager Astronomy Solver I2 ( ) )^(^, 2sVpfV - å ¹kj X Solver

Militzer, Burkhard

83

Enhancing Astronomy Major Learning Through Group Research Projects  

NASA Astrophysics Data System (ADS)

The University of Arizona Astronomy Club has been using group research projects to enhance the learning experience of undergraduates in astronomy and related fields. Students work on two projects that employ a peer-mentoring system so they can learn crucial skills and concepts necessary in research environments. Students work on a transiting exoplanet project using the 1.55-meter Kuiper Telescope on Mt. Bigelow in Southern Arizona to collect near-UV and optical wavelength data. The goal of the project is to refine planetary parameters and to attempt to detect exoplanet magnetic fields by searching for near-UV light curve asymmetries. The other project is a survey that utilizes the 12-meter Arizona Radio Observatory on Kitt Peak to search for the spectroscopic signature of infall in nearby starless cores. These are unique projects because students are involved throughout the entire research process, including writing proposals for telescope time, observing at the telescopes, data reduction and analysis, writing papers for publication in journals, and presenting research at scientific conferences. Exoplanet project members are able to receive independent study credit for participating in the research, which helps keep the project on track. Both projects allow students to work on professional research and prepare for several astronomy courses early in their academic career. They also encourage teamwork and mentor-style peer teaching, and can help students identify their own research projects as they expand their knowledge.

McGraw, Allison M.; Hardegree-Ullman, K.; Turner, J.; Shirley, Y. L.; Walker-Lafollette, A.; Scott, A.; Guvenen, B.; Raphael, B.; Sanford, B.; Smart, B.; Nguyen, C.; Jones, C.; Smith, C.; Cates, I.; Romine, J.; Cook, K.; Pearson, K.; Biddle, L.; Small, L.; Donnels, M.; Nieberding, M.; Kwon, M.; Thompson, R.; De La Rosa, R.; Hofmann, R.; Tombleson, R.; Smith, T.; Towner, A. P.; Wallace, S.

2013-01-01

84

Olfar, orbiting low frequency antennas for radio astronomy  

Microsoft Academic Search

New interesting astronomical science drivers for very low frequency radio astronomy have emerged, ranging from studies of the astronomical dark ages, the epoch of reionization, exoplanets, to ultra-high energy cosmic rays. Huge efforts are currently made to establish low frequency Earthbound instruments, since today’s technology is able to support this. However, astronomical observations with Earth-bound radio telescopes at very low

Mark Bentum; Chris Verhoeven; Albert-Jan Boonstra

2009-01-01

85

Planetary radio astronomy observations from Voyager 2 near Jupiter  

Microsoft Academic Search

The Voyager 2 Planetary Radio Astronomy experiment to Jupiter has confirmed and extended to higher zenomagnetic latitudes results from the identical experiment carried by Voyager 1. The kilometric emissions discovered by Voyager 1 often extended to 1 megahertz or higher on Voyager 2 and often consisted of negatively, or less frequently, positively drifting narrowband bursts. On the basis of tentative

J. W. Warwick; J. B. Pearce; A. C. Riddle; J. K. Alexander; M. D. Desch; M. L. Kaiser; J. R. Thieman; T. D. Carr; S. Gulkis; A. Boischot; Y. LEBLANC; B. M. PEDERSEN; D. H. STAELIN

1979-01-01

86

NATIONAL RADIO ASTRONOMY OBSERVATORY Electronics Division Internal Report No. 61  

E-print Network

NATIONAL RADIO ASTRONOMY OBSERVATORY Electronics Division Internal Report No. 61 FREQUENCY SWEEPER John Payne Sep tember 1967 NUMBER OF COPIES! 100 #12;FREQUENCY SWEEPER John Payne . General Description The sweeper described in this note has been designed to be suitable for installation in a front-end box

Groppi, Christopher

87

Radio astronomy in Africa: the case of Ghana  

E-print Network

South Africa has played a leading role in radio astronomy in Africa with the Hartebeesthoek Radio Astronomy Observatory (HartRAO). It continues to make strides with the current seven-dish MeerKAT precursor array (KAT-7), leading to the 64-dish MeerKAT and the giant Square Kilometer Array (SKA), which will be used for transformational radio astronomy research. Ghana, an African partner to the SKA, has been mentored by South Africa over the past six years and will soon emerge in the field of radio astronomy. The country will soon have a science-quality 32m dish converted from a redundant satellite communication antenna. Initially, it will be fitted with 5 GHz and 6.7 GHz receivers to be followed later by a 1.4 - 1.7 GHz receiver. The telescope is being designed for use as a single dish observatory and for participation in the developing African Very Long Baseline Interferometry (VLBI) Network (AVN) and the European VLBI Network. Ghana is earmarked to host a remote station during a possible SKA Phase 2. The loca...

Asabere, Bernard Duah; Horellou, Cathy; Winkler, Hartmut; Jarrett, Thomas

2015-01-01

88

NATIONAL RADIO ASTRONOMY OBSERVATORY GREEN BANK, WEST VIRGINIA  

E-print Network

NATIONAL RADIO ASTRONOMY OBSERVATORY GREEN BANK, WEST VIRGINIA ELECTRONICS DIVISION INTERNAL REPORT NUMBER OF COPIES: 150 #12;GaAs CHIP CHOKE WHISKER CHOKE (.006" QUARTZ) CHIP INTRODUCTION Schottky barrier-Choke Subassembly The GaAs Schottky barrier diode is mounted and contacted in the choke subassembly shown in Figure

Groppi, Christopher

89

A history of radio astronomy polarisation measurements  

NASA Astrophysics Data System (ADS)

While intensity of electromagnetic radiation (radio, infrared, light, or X-ray) gives us primary information about the distribution of the baryonic matter in the Universe, polarisation is a parameter that enables us to investigate many additional details. Polarisation at radio frequencies gives us details of emission processes since the non-thermal synchrotron process dominates at low radio frequencies in emission regions. In addition, polarised radio sources can be used as probes of the intervening interstellar medium through which the radio waves are propagated. Faraday rotation effects are observed and in conjunction with known thermal emission can be used to determine magnetic fields. The Zeeman effect, a direct method of determining magnetic fields, depends on the observation of the circularpolarisation components of a spectral line. In this paper I describe the early polarisation observations of radio sources, but in addition I follow the developments through to the present day.

Wielebinski, Richard

2012-07-01

90

Need a Classroom Stimulus? Introduce Radio Astronomy  

ERIC Educational Resources Information Center

Silently, invisibly, ceaselessly, our planet Earth is showered by radio waves from every direction and from every region of space. This radio energy originates in our solar system, throughout the Milky Way galaxy, and far beyond, out to the remotest reaches of the universe. Detecting and unraveling the origins of these invisible signals is what…

Derman, Samuel

2010-01-01

91

Problems and Projects from Astronomy.  

ERIC Educational Resources Information Center

Describes activities to stimulate school astronomy programs. Topics include: counting stars; the Earth's centripetal force; defining astronomical time; three types of sundials; perceptions of star brightness; sunspots and solar radiation; stellar spectroscopy; number-crunching and the molecular structure of the atmosphere; the Earth-Moon common…

Mills, H. R.

1991-01-01

92

The importance of Radio Quiet Zone (RQZ) for radio astronomy  

NASA Astrophysics Data System (ADS)

Most of radio observatories are located in isolated areas. Since radio sources from the universe is very weak, astronomer need to avoid radio frequency interference (RFI) from active spectrum users and radio noise produced by human made (telecommunication, mobile phone, microwave user and many more. There are many observatories around the world are surrounded by a Radio Quiet Zone (RQZ), which is it was set up using public or state laws. A Radio Quiet Zone normally consists of two areas: an exclusive area in which totally radio emissions are forbidden, with restrictions for residents and business developments, and a larger (radius up to 100 km above) coordination area where the power of radio transmission limits to threshold levels. Geographical Information System (GIS) can be used as a powerful tool in mapping large areas with varying RQZ profiles. In this paper, we report the initial testing of the usage of this system in order to identify the areas were suitable for Radio Quiet Zone. Among the important parameters used to develop the database for our GIS are population density, information on TV and telecommunication (mobile phones) transmitters, road networks (highway), and contour shielding. We will also use other information gathered from on-site RFI level measurements on selected 'best' areas generated by the GIS. The intention is to find the best site for the purpose of establishing first radio quiet zones for radio telescope in Malaysia.

Umar, Roslan; Abidin, Zamri Zainal; Ibrahim, Zainol Abidin

2013-05-01

93

An outside view of Radio Astronomy  

NASA Astrophysics Data System (ADS)

Astronomy is in a golden age of discovery of the new, with a growing appreciation from astrophysics that physics has studied so far an almost insignificant fraction of reality. This golden age is enabled by technology, with next generation technologies approaching the Giga-euro/dollar investment level. This forces a strategic view of relative strengths in the past, and strategies for future developments. Some of these may transcend traditional wavelength classifications.

Gilmore, G.

94

47 CFR 73.6027 - Class A TV notifications concerning interference to radio astronomy, research and receiving...  

Code of Federal Regulations, 2014 CFR

...Class A TV notifications concerning interference to radio astronomy, research and receiving installations...COMMUNICATIONS COMMISSION (CONTINUED) BROADCAST RADIO SERVICES RADIO BROADCAST SERVICES Class A Television Broadcast...

2014-10-01

95

47 CFR 73.6027 - Class A TV notifications concerning interference to radio astronomy, research and receiving...  

Code of Federal Regulations, 2013 CFR

...Class A TV notifications concerning interference to radio astronomy, research and receiving installations...COMMUNICATIONS COMMISSION (CONTINUED) BROADCAST RADIO SERVICES RADIO BROADCAST SERVICES Class A Television Broadcast...

2013-10-01

96

47 CFR 73.6027 - Class A TV notifications concerning interference to radio astronomy, research and receiving...  

Code of Federal Regulations, 2010 CFR

...Class A TV notifications concerning interference to radio astronomy, research and receiving installations...COMMUNICATIONS COMMISSION (CONTINUED) BROADCAST RADIO SERVICES RADIO BROADCAST SERVICES Class A Television Broadcast...

2010-10-01

97

47 CFR 73.6027 - Class A TV notifications concerning interference to radio astronomy, research and receiving...  

Code of Federal Regulations, 2011 CFR

...Class A TV notifications concerning interference to radio astronomy, research and receiving installations...COMMUNICATIONS COMMISSION (CONTINUED) BROADCAST RADIO SERVICES RADIO BROADCAST SERVICES Class A Television Broadcast...

2011-10-01

98

47 CFR 73.6027 - Class A TV notifications concerning interference to radio astronomy, research and receiving...  

Code of Federal Regulations, 2012 CFR

...Class A TV notifications concerning interference to radio astronomy, research and receiving installations...COMMUNICATIONS COMMISSION (CONTINUED) BROADCAST RADIO SERVICES RADIO BROADCAST SERVICES Class A Television Broadcast...

2012-10-01

99

Probing the field of radio astronomy with the SKA and the Hartebeesthoek Radio observatory: an engineer's perspective  

NASA Astrophysics Data System (ADS)

The Square Kilometre Array (SKA) is an international project to build the world's largest and most sensitive radio telescope interferometer. It will consist of thousands of antennas distributed over many kilometers, with the hosting country being either South Africa or Australia. This talk will give some background on the SKA technologies, pathfinders and Key Science Projects and also consider the system design options for the SKA Pulsar science case. The Hartebeesthoek Radio Astronomy Observatory (HartRAO) is the only major radio astronomy observatory in Africa; with KAT-7 in testing and the MeerKAT still in it's design phase. Some of my research work at HartRAO is presented, which includes data analysis of the pointing model for the 26m radio telescope and evaluating the performance of the GPS-disciplined Rubidium and Hydrogen Maser frequency standards. I will also talk about our project to build a 1.4GHz receiver for a commercial satellite TV antenna as well as calibrating data at 22GHz for observing water masers in Orion.

Otto, Sunelle

2011-07-01

100

Seeking Graduate & Undergraduate Students I'm seeking students to participate in a variety of projects. All of these pertain to ongoing research in radio astronomy; in  

E-print Network

-instrumenting the NRAO Green Bank 20-m radio telescope to search for a rare and recently-discovered astrophysical phased array-type radio telescope consisting of interconnected "tiles", with each tile consisting://arxiv.org/abs/1304.0812 ­ A different radio telescope: http://arxiv.org/abs/1204.4816 and http://arxiv.org/abs/1307

Ellingson, Steven W.

101

Introducing the Virtual Astronomy Multimedia Project  

NASA Astrophysics Data System (ADS)

The goal of the Virtual Astronomy Multimedia Project (VAMP) is to promote and vastly multiply the use of astronomy multimedia resources—from images and illustrations to animations, movies, and podcasts—and enable innovative future exploitation of a wide variety of outreach media by systematically linking resource archives worldwide. High-quality astronomical images, accompanied by rich caption and background information, abound on the web and yet prove notoriously difficult to locate efficiently using existing search tools. The Virtual Astronomy Multimedia Project offers a solution via the Astronomy Visualization Metadata (AVM) standard. Due to roll out in time for IYA2009, VAMP manages the design, implementation, and dissemination of the AVM standard for the education and public outreach astronomical imagery that observatories publish. VAMP will support implementations in World Wide Telescope, Google Sky, Portal to the Universe, and 365 Days of Astronomy, as well as Uniview and DigitalSky software designed specifically for planetariums. The VAMP workshop will introduce the AVM standard and describe its features, highlighting sample image tagging processes using diverse tools—the critical first step in getting media into VAMP. Participants with laptops will have an opportunity to experiment first hand, and workshop organizers will update a web page with system requirements and software options in advance of the conference (see http://virtualastronomy.org/ASP2008/ for links to resources). The workshop will also engage participants in a discussion and review of the innovative AVM image hierarchy taxonomy, which will soon be extended to other types of media.

Wyatt, Ryan; Christensen, L. L.; Gauthier, A.; Hurt, R.

2008-05-01

102

Preliminary Report on Water Supply, Millimeter Array Project, National Radio  

E-print Network

INVEREX Preliminary Report on Water Supply, Millimeter Array Project, National Radio Astronomy of water supply and (2) any obvious geological evidence regarding the quality of the basement which would 22­23,in which a geological observation and search for water supply were conducted. The regional

Groppi, Christopher

103

Developments in Coherent Amplifiers and Miniaturized Receivers for Radio Astronomy  

NASA Astrophysics Data System (ADS)

Recent advances in the development of InP HEMT amplifiers have produced a breakthrough in the cryogenic noise performance of these devices. Caltech's Cahill Radio Astronomy Lab (CRAL), JPL and Northrop Grumman (NGAS) are working to produce new amplifiers which can exploit this improved performance for radio astronomy. In parallel, these new amplifiers are being integrated into a family of miniaturized modular receivers which have wide application as focal plane arrays. Such arrays will have a major impact on a diverse range of scientific goals, such as measurement of integrated CO from the Epoch of Reionization, efficient spectroscopic and continuum mapping of Galactic emission and measurement of the B-mode polarization of the cosmic microwave background. We report on these developments and prospects for the future.

Cleary, Kieran; Readhead, A. C.; Reeves, R.; Gawande, R.; Kooi, J.; Gaier, T.; Lawrence, C. R.; Kangaslahti, P.; Samoska, L.; Varonen, M.; Lai, R.; Sarkozy, S.; Church, S. E.; Sieth, M.; Devaraj, K.; Voll, P.

2013-01-01

104

Hartebeesthoek Radio Astronomy Observatory (HartRAO)  

NASA Technical Reports Server (NTRS)

HartRAO provides the only fiducial geodetic site in Africa, and it participates in global networks for VLBI, GNSS, SLR, and DORIS. This report provides an overview of geodetic VLBI activities at HartRAO during 2012, including the conversion of a 15-m alt-az radio telescope to an operational geodetic VLBI antenna.

Nickola, Marisa; Gaylard, Mike; Quick, Jonathan; Combrinck, Ludwig

2013-01-01

105

Radio broadcasting: an attractive way of broadcasting astronomy  

NASA Astrophysics Data System (ADS)

Astronomy is full of beautiful skyscapes, shining stars and huge planets. The vast majority of them can be transformed into tactile images and complemented by audio descriptions. These translations of visual information into raised lines, shapes and textures can be felt with the fingertips instead of viewed with the eyes. In this way, the beauties of the Universe enter the universe of blind and visually impaired people. Happily, we all have radio broadcasting as an important source of information and entertainment. Science radio programmes can bring the real music of the spheres (as Pythagoras once suggested) to the audience.

Mosoia, C.

2008-06-01

106

Data models for Radio Astronomy in the VO  

NASA Astrophysics Data System (ADS)

Data Models are an essential part of automatic data processing, but even more so when trying to tie together data coming from many different data sources, as is the case for the International Virtual Observatory. In this talk we will review the different data models used in the IVOA, which parts of that Data Modelling work are still incomplete, especially in radio wavelengths, and the work the AMIGA group has done within the IVOA Data Modelling Working Group to overcome those shortcomings both in missing data models and support for Radio Astronomy.

Santander-Vela, J. D.

2009-07-01

107

Correlating Radio Astronomy Signals with Many-Core Hardware  

Microsoft Academic Search

A recent development in radio astronomy is to replace traditional dishes with many small antennas. The signals are combined\\u000a to form one large, virtual telescope. The enormous data streams are cross-correlated to filter out noise. This is especially\\u000a challenging, since the computational demands grow quadratically with the number of data streams. Moreover, the correlator\\u000a is not only computationally intensive, but

Rob V. van Nieuwpoort; John W. Romein

2011-01-01

108

A Maser Amplifier for Radio Astronomy at X-Band  

Microsoft Academic Search

The design and operating characteristics of a maser radiometer for use in radio astronomy at 3-cm wavelength are discussed. The operating system which is described has a bandwidth of 5.5 mc and an input noise temperature, including background radiation into the antenna, of about 85°K. An rms fluctuation level of about 0.04°K is attained using an averaging time of 5

J. A. Giordmaine; L. E. Alsop; C. H. Mayer; C. H. Townes

1959-01-01

109

Phenomenology of Neptune's radio emissions observed by the Voyager planetary radio astronomy experiment  

NASA Technical Reports Server (NTRS)

The Neptune flyby in 1989 added a new planet to the known number of magnetized planets generating nonthermal radio emissions. We review the Neptunian radio emission morphology as observed by the planetary radio astronomy experiment on board Voyager 2 during a few weeks before and after closest approach. We present the characteristics of the two observed recurrent main components of the Neptunian kilometric radiation, i.e., the 'smooth' and the 'bursty' emissions, and we describe the many specific features of the radio spectrum during closest approach.

Pedersen, B. M.; Lecacheux, A.; Zarka, P.; Aubier, M. G.; Kaiser, M. L.; Desch, M. D.

1992-01-01

110

Planetary radio astronomy: Earth, giant planets, and beyond  

NASA Astrophysics Data System (ADS)

The magnetospheric phenomenon of non-thermal radio emission is known since the serendipitous discovery of Jupiter as radio planet in 1955, opening the new field of "Planetary Radio Astronomy". Continuous ground-based observations and, in particular, space-borne measurements have meanwhile produced a comprehensive picture of a fascinating research area. Space missions as the Voyagers to the Giant Planets, specifically Voyager 2 further to Uranus and Neptune, Galileo orbiting Jupiter, and now Cassini in orbit around Saturn since July 2004, provide a huge amount of radio data, well embedded in other experiments monitoring space plasmas and magnetic fields. The present paper as a condensation of a presentation at the Kleinheubacher Tagung 2013 in honour of the 100th anniversary of Prof. Karl Rawer, provides an introduction into the generation mechanism of non-thermal planetary radio waves and highlights some new features of planetary radio emission detected in the recent past. As one of the most sophisticated spacecraft, Cassini, now in space for more than 16 years and still in excellent health, enabled for the first time a seasonal overview of the magnetospheric variations and their implications for the generation of radio emission. Presently most puzzling is the seasonally variable rotational modulation of Saturn kilometric radio emission (SKR) as seen by Cassini, compared with early Voyager observations. The cyclotron maser instability is the fundamental mechanism under which generation and sufficient amplification of non-thermal radio emission is most likely. Considering these physical processes, further theoretical investigations have been started to investigate the conditions and possibilities of non-thermal radio emission from exoplanets, from potential radio planets in extrasolar systems.

Rucker, H. O.; Panchenko, M.; Weber, C.

2014-11-01

111

Monitoring Radio Frequency Interference: The Quiet Skies Project  

NASA Astrophysics Data System (ADS)

The Quiet Skies Project is a result of the Research Experience for Teacher (RET) program during the summer of 2004. Teachers were involved in discovering the relationship between radio frequency interference (RFI) and radio astronomy observations. S. Rapp participated in astronomy observations with the Green Bank Telescope in order to characterize RFI issues at radio observatories and worked closely with the Green Bank Interference Protection Group. This work included such tasks as mitigation of locally-generated RFI from power poles and running radiation propagation studies for transmitters within the National Radio Quiet Zone. A curriculum was created to allow high school students to participate in a research effort to determine RFI levels in their communities. The aim of the project is to promote student awareness of radio astronomy and radio frequency interference through an inquiry-based science curriculum. It is hoped that the project will go national by 2007. A prototype RFI detector was created and tested at four wavelengths; 850, 900, 1425, and 1675 MHz. High school students used a beta version of the RFI detector to explore the occurrence of RFI at their schools and in their communities. The student goals of the Quiet Skies Project are to: Measure interference levels at their schools and in their communities; Reduce and transmit their data to an NRAO data base; Use online spectrum allocation data, and local information to determine possible causes of interference in their area; Analyze the complex trade-offs between radio astronomy's need for quiet skies, and other commercial, and non-commercial uses of the spectrum and share their insights with others. This work was funded by the NSF-RET program and a grant from the NASA-IDEAS program

Rapp, S.; Gear, C.; Maddalena, R. J.; Heatherly, S. A.

2004-12-01

112

Millimeter Radio Astronomy and the Solar Convection Zone  

NASA Astrophysics Data System (ADS)

The global distribution of solar surface activity (active regions) is connected with processes in the convection zone. To extract the information on large-scale motions in the convection zone, we study the solar synoptic charts (Mount Wilson 1998-2004, Fe I, 525.02 nm). The clear indication of large-scale ( ? 18 degree) turbulence is found. This may be a manifestations of the deep convection because there is no such global turbulent eddies in the solar photosphere. The preferred scales of longitudinal variations in surface solar activity are revealed. These correspond to about 15 degree to 51 degree (gigantic convection cells), 90 degree, 180 degree and 360 degree. Similar scales (e.g., 40 degree and 90 degree) are found in the millimeter radio-images (Metsahovi Radio Observatory 1994-1998, 37 and 87 GHz). Hence, the millimeter radio astronomy could prove useful for remote sensing of the solar convection zone.

Arkhypov, O. V.; Antonov, O. V.; Khodachenko, M. L.

113

Radio Astronomy Explorer (RAE) 1 observations of terrestrial radio noise  

NASA Technical Reports Server (NTRS)

Radio Astonomy Explorer (RAE) 1 data are analyzed to establish characteristics of HF terrestrial radio noise at an altitude of about 6000 km. Time and frequency variations in amplitude of the observed noise well above cosmic noise background are explained on the basis of temporal and spatial variations in ionospheric critical frequency coupled with those in noise source distributions. It is shown that terrestrial noise regularly breaks through the ionosphere and reaches RAE with magnitudes 15 or more db higher than cosmic noise background. Maximum terrestrial noise is observed when RAE is over the dark side of the Earth in the neighborhood of equatorial continental land masses where thunderstorms occur most frequently. The observed noise level is 30-40 db lower with RAE over oceans.

Herman, J. R.; Caruso, J. A.

1971-01-01

114

Real-time Streaming Correlation for Long Wavelength Array (LWA) Radio Astronomy Applications  

E-print Network

-scale interferometric radio telescope arrays. The Solution: PASI correlates 256, dual-polarized 50-100 KHz antennaReal-time Streaming Correlation for Long Wavelength Array (LWA) Radio Astronomy Applications

115

Digital Instrumentation for the Radio Astronomy Community  

Microsoft Academic Search

Time-to-science is an important figure of merit for digital instrumentation serving the astronomical community. A digital signal processing (DSP) community is forming that uses shared hardware development, signal processing libraries, and instrument architectures to reduce development time of digital instrumentation and to improve time-to-science for a wide variety of projects. We suggest prioritizing technological development supporting the needs of this

Aaron Parsons; Dan Werthimer; Donald Backer; Tim Bastian; Geoffrey Bower; Walter Brisken; Henry Chen; Adam Deller; Terry Filiba; Dale Gary; Lincoln Greenhill; David Hawkins; Glenn Jones; Glen Langston; Joseph Lasio; Joeri Van Leeuwen; Daniel Mitchell; Jason Manley; Andrew Siemion; Hayden Kwok-Hay So; Alan Whitney; Dave Woody; Melvyn Wright; Kristian Zarb-Adami

2009-01-01

116

RASDR: Benchtop Demonstration of SDR for Radio Astronomy  

SciTech Connect

The Society of Amateur Radio Astronomers (SARA) members present the benchtop version of RASDR, a Software Defined Radio (SDR) that is optimized for Radio Astronomy. RASDR has the potential to be a common digital receiver interface useful to many SARA members. This document describes the RASDR 0.0 , which provides digitized radio data to a backend computer through a USB 2.0 interface. A primary component of RASDR is the Lime Microsystems Femtocell chip which tunes from a 0.4-4 GHz center frequency with several selectable bandwidths from 0.75 MHz to 14 MHz. A second component is a board with a Complex Programmable Logic Device (CPLD) chip that connects to the Femtocell and provides two USB connections to the backend computer. A third component is an analog balanced mixer up conversion section. Together these three components enable RASDR to tune from 0.015 MHz thru 3.8GHz of the radio frequency (RF) spectrum. We will demonstrate and discuss capabilities of the breadboard system and SARA members will be able to operate the unit hands-on throughout the workshop.

Vacaliuc, Bogdan [ORNL] [ORNL; Oxley, Paul [Retired] [Retired; Fields, David [ORNL] [ORNL; Kurtz, Dr. Stan [Universidad Nacional Autonoma de Mexico (UNAM)] [Universidad Nacional Autonoma de Mexico (UNAM); Leech, Marcus [Shirleys Bay Radio Astronomy Consortium] [Shirleys Bay Radio Astronomy Consortium

2012-01-01

117

Superconducting filter for radio astronomy using interdigitated, capacitively loaded spirals  

NASA Astrophysics Data System (ADS)

A matched pair of microstrip spiral superconducting filters with centre frequency 357.5 MHz and 29.4% bandwidth has been developed for radio astronomy. The high coupling coefficients required for the large bandwidth have been achieved through interdigitating the spirals to provide a large interaction length, and by adding loading capacitors on the inner ends of the resonators, together with previously reported features. A low-pass filter has been cascaded with each band-pass filter to mitigate spurious responses. Measurements show 0.09 dB loss, thought to arise mainly from sources outside the filter itself, plus 0.12 dB maximum ripple.

Bolli, Pietro; Huang, Frederick

2012-03-01

118

8 LINCOLN LABORATORY JOURNAL n VOLUME 21, NUMBER 1, 2014 InsIghts Into the UnIverse: Astronomy wIth hAystAck's rAdIo telescope  

E-print Network

wIth hAystAck's rAdIo telescope Insights into the Universe: Astronomy with Haystack's Radio Telescope game-changing tech- nology for radio science, and to apply it to the study of our planet, its space projects. The observatory is operated under an agreement with the Northeast Radio Observatory Corporation

Williams, Brian C.

119

Centimeter-wave Research with the Morehead State University 21 M Radio Telescope: Involving Undergraduate Students in Radio Astronomy Research  

NASA Astrophysics Data System (ADS)

The Space Science Center at Morehead State University has developed a medium aperture cm-wave radio telescope, the 21 M Space Tracking Antenna and Radio Telescope. Located in the radio-frequency quiet, mountainous region of eastern Kentucky, the telescope serves as an Earth Station for satellite mission support and provides telemetry, tracking, and control services with an emphasis on university cubesat missions. In addition, the telescope is engaged in research programs in radio astronomy and features receivers operating in the Ku-band (11.2 to 12.7 GHz, including a well-known methanol line) and the L-band (1.4 to 1.7 GHz, including lines of atomic hydrogen and molecular hydroxyl). At these bands, the telescope is capable of supporting a wide variety of niche astronomical research programs, including longitudinal studies (e.g., active galactic nuclei (AGN) monitoring), observations of transient phenomena (e.g., gamma-ray bursts and supernovae), and surveys (e.g., kinematic studies of Galactic HI). A description of the space tracking antenna system and radio telescope, its capabilities and research projects planned for or currently underway with the telescope (namely monitoring AGNs and surveying the Galactic supernova remnant population) will be presented and discussed. Funding for the 21m telescope has been provided by NASA, the SBA, the Kentucky Science and Engineering Foundation and Kentucky NSF EPSCoR.

Malphrus, Benjamin K.; Pannuti, T. G.; Atwood, J. W.; Ennis, M. E.

2007-12-01

120

Embracing the Wave: Using the Very Small Radio Telescope to Teach Students about Radio Astronomy  

NASA Astrophysics Data System (ADS)

The Very Small Radio Telescope (VSRT) is a low-cost educational tool appropriate for laboratory demonstrations of the nature of radio waves and the principles of interferometry for use in both high school and undergraduate physics/astronomy classes. The system consists of small direct broadcast antenna dishes and other commercially available parts and can be assembled for under $500. Complete teaching units have been developed and tested by high school physics teachers to demonstrate radio wave transmission and exponential absorption though materials (Beer's law), the polarization of electromagnetic waves (Malus' law), the inverse square law, and interferometry. These units can be used to explore the properties of electromagnetic waves, including similarities and differences between radio and visible light, while challenging students' misconceptions about a wavelength regime that is important to both astronomy and everyday life. In addition, the VSRT can be used as a radio astronomical interferometer to measure the diameter of the Sun at 12 GHz. Full details, including a parts list, comprehensive assembly instructions, informational memos, teaching units, software, and conformance to national and Massachusetts educational standards, are available on the web at http://www.haystack.mit.edu/edu/undergrad/VSRT/index.html . Development of the VSRT at MIT Haystack Observatory is made possible through funding provided by the National Science Foundation.

Fish, Vincent L.; Needles, M. M.; Rogers, A. E. E.; Doherty, M.; Minnigh, S.; Arndt, M. B.; Pratap, P.

2010-01-01

121

Trans-Pacific Astronomy Experiment Project Status  

NASA Technical Reports Server (NTRS)

The Trans-Pacific Astronomy Experiment is Phase 2 of the Trans-Pacific High Data Rate Satcom Experiments following the Trans-Pacific High Definition Video Experiment. It is a part of the Global Information Infrastructure-Global Interoperability for Broadband Networks Project (GII-GIBN). Provides global information infrastructure involving broadband satellites and terrestrial networks and access to information by anyone, anywhere, at any time. Collaboration of government, industry, and academic organizations demonstrate the use of broadband satellite links in a global information infrastructure with emphasis on astronomical observations, collaborative discussions and distance learning.

Hsu, Eddie

2000-01-01

122

U.S.-Canadian Partnership in Radio Astronomy Valuable for Science, NRAO Director Says  

NASA Astrophysics Data System (ADS)

The United States and Canada intend to collaborate on two of the most important radio astronomy projects of the new century - the Atacama Large Millimeter Array (ALMA) and the Expanded Very Large Array (EVLA), astronomers from both countries announced today. "This cooperative program - the North American Partnership in Radio Astronomy - involves the key projects that will dominate radio astronomy world-wide," said Paul Vanden Bout, director of the National Radio Astronomy Observatory (NRAO). "This partnership will multiply the efforts of both nations' astronomers for the benefit of science. It builds on a long tradition of cooperative efforts in radio astronomy, and will ensure that we continue that tradition into the new millennium," Vanden Bout said. The U.S.-Canada radio astronomy partnership is outlined in two letters of intent signed recently. The first, between the U.S. National Science Foundation (NSF) and Canada's National Research Council (NRC), states that both agencies will use their best efforts to obtain the necessary funding for construction and operation of ALMA. The second, between the National Radio Astronomy Observatory, funded by the NSF, and the Herzberg Institute of Astrophysics, funded by the NRC, forms a partnership in the EVLA. The VLA Expansion Project is a two-phase program designed to improve the scientific capabilities of the VLA tenfold by replacing 1970s-vintage equipment with modern technologies and adding new radio-telescope antennas to the existing 27-antenna array. Dedicated in 1980, the VLA has been used for more than 10,000 observing projects covering nearly every area of astrophysics. It is the most powerful, flexible and widely-used radio telescope in the world. The Expanded VLA will provide the improved observational capabilities needed to meet the research challenges of the coming years. In addition to the participation by Canada, funds have been pledged by Mexico. Both Mexico and Germany have funded VLA improvements in the past. A proposal to the NSF requesting U.S. funds for the EVLA is currently under review by the National Science Foundation. The agreement between the NRAO and the Herzberg Institute of Astrophysics (HIA) calls for HIA to build a new correlator - the digital "heart" that combines the received signals from multiple antennas to make those antennas work as a single, powerful telescope - for the EVLA. The new correlator will represent a contribution of 10 million (US). The full EVLA project will cost about 150 million, to be done in two phases, the first costing 75 million. "Canada has a strong program of radio astronomy, and in particular a skilled team of specialists in designing correlators, and we are pleased to have their talents directed toward building a new machine for the VLA," Vanden Bout said. ALMA will consist of 64 12-meter-diameter dish antennas comprising a single imaging telescope to study the universe at millimeter and submillimeter wavelengths - the region between radio waves and infrared waves. An international project being designed and developed by the U.S. and European nations, ALMA will be located on a high-altitude site in the Atacama desert of Chile. "ALMA will give scientists an unprecedented look at the structure of the early universe and revolutionary insights on how stars and planets form, among many other contributions," Vanden Bout said. "The EVLA will bring unmatched power and versatility to the study of objects as close as the Sun and planets and as far as primeval galaxies at the edge of the observable universe. Together, these two instruments will be at the forefront of 21st Century astrophysics," he added. "ALMA has been a bilateral project involving the United States and Europe. These new agreements with Canada turn ALMA into a partnership between Europe and North America," Vanden Bout said. Design and development work on ALMA has been ongoing since 1998, funded by the NSF and European organizations. Canadians already have participated in this work. ALMA is pla

2001-10-01

123

Genome Radio Project: Quarterly report  

SciTech Connect

The process of conducting background research for the programs of the Genome Radio Project is continuing. The most developed of the program ``backgrounders`` have been reviewed by series and program advisors from various fields. Preliminary and background interviews have been conducted with dozens of potential program participants and advisors. Structurally, efforts are being directed toward developing and formalizing the project and series advisor relationships so that the best use can be made of those experts who have offered to assist the project in its presentation of program content. The library of research materials has been expanded considerably, creating a useful resource library for the producers.

NONE

1997-08-01

124

The Search for Axions: Non-Conventional Radio Astronomy  

NASA Astrophysics Data System (ADS)

The strong-CP problem in particle physics can be resolved quite elegantly when one ponders the ramifications of a hypothetical particle known as the axion. In this paper, a plausible argument for the axion is viewed from a historical perspective and its physical properties are presented within a cosmological framework. The detection of axions through enhanced Primakoff conversion is described along with details of the Axion Dark Matter eXperiment (ADMX), where NRAO's contribution is highlighted. Other search experiments are also summarized. The paper concludes with a short discussion of how the technology of radio astronomy might be used to enable other experiments that are designed to further our understanding of fundamental physics.

Bradley, R. F.

2008-08-01

125

Planetary radio astronomy observations from Voyager 2 near Jupiter  

NASA Technical Reports Server (NTRS)

The Voyager 2 Planetary Radio Astronomy experiment to Jupiter has confirmed and extended to higher zenomagnetic latitudes results from the identical experiment carried by Voyager 1. The kilometric emissions discovered by Voyager 1 often extended to 1 megahertz or higher on Voyager 2 and often consisted of negatively, or less frequently, positively drifting narrowband bursts. On the basis of tentative identification of plasma wave emissions similar to those detected by Voyager 1, the plasma torus associated with Io appeared somewhat denser to Voyager 2 than it did to Voyager 1. The paper reports on quasi-periodic sinusoidal or impulsive bursts in the broadcast band range of wavelengths (800 to 1800 kHz). A Faraday effect appears at decametric frequencies, which probably results from propagation of the radiation near its sources on Jupiter. Finally, the occurrence of decametric emission in homologous arc families is discussed.

Warwick, J. W.; Pearce, J. B.; Riddle, A. C.; Alexander, J. K.; Desch, M. D.; Kaiser, M. L.; Thieman, J. R.; Carr, T. D.; Gulkis, S.; Boischot, A.

1979-01-01

126

NAIC/NRAO School on Single Dish Radio Astronomy ASP Conference Series, Vol. , 2001  

E-print Network

to calibrate radio telescope data in the centimeter wavelength regime. This includes a discussion of the varNAIC/NRAO School on Single Dish Radio Astronomy ASP Conference Series, Vol. , 2001 Salter, et al. Single Dish Calibration Techniques at Radio Wavelengths K. O'Neil NAIC/Arecibo Observatory, HC3 Box 53995

O'Neil, Karen

127

ITEMS Project: An online sequence for teaching mathematics and astronomy  

NASA Astrophysics Data System (ADS)

This work describes an elearning sequence for teaching geometry and astronomy in lower secondary school created inside the ITEMS (Improving Teacher Education in Mathematics and Science) project. It is based on results from the astronomy education research about studentsŠ difficulties in understanding elementary astronomical observations and models. The sequence consists of a set of computer animations embedded in an elearning environment aimed at supporting students in learning about astronomy ideas that require the use of geometrical concepts and visual-spatial reasoning.

Martínez, Bernat; Pérez, Josep

2010-10-01

128

Jansky and Reber: Two Remarkable Stories in Early Radio Astronomy  

NASA Astrophysics Data System (ADS)

Extraterrestrial radio waves were first detected in 1931-32 by Karl Jansky at the Bell Telephone Labs in New Jersey while he was investigating sources of interference to recently opened, trans-Atlantic shortwave (20 MHz) radiotelephone circuits. At this time Jansky was only a few years beyond his physics degree from the University of Wisconsin, where his father was a professor of engineering. Jansky studied this "star noise" off and on until 1935, establishing that the emission came from the direction of the Milky Way and the galactic center, but did not pursue it in any further detail. The only other person to make a significant contribution to the nascent subject before World War II was Grote Reber, an electrical engineer who worked for several different radio firms in Chicago. After reading Jansky's articles, in 1937 Reber decided to build a 30-ft diameter dish antenna in the backyard of his suburban home in Wheaton, Illinois. By 1939 he had detected the Jansky radiation, which he called "cosmic noise", at 160 MHz and he comenced a long term program of mapping it in detail (with a 12 degree beam). Reber became a well-known figure to the astronomers at the University of Chicago and Yerkes Observatory (Struve, Greenstein, Kuiper, Henyey, Keenan) as he sought to learn astronomy and convince the staff that this cosmic noise was of importance. Struve, editor of the "Astrophysical Journal", was finally persuaded to publish Reber's articles. During and just after the war Reber extended his work to 480 MHz. He then sought funds to move his dish to a quieter locale and to build a second, much larger dish, but neither of these plans came to fruition. It is ironic that the remarkable contributions of these two pioneers to the field that would eventually become known as "radio astronomy" (a term only introduced in the late 1940s) had little influence on the spectacular growth of the field in the decade after World War II. The great bulk of the important work was done in England and Australia, where it grew wholly independently out of wartime radar labs. Reasons for the lag in the US, largely due to the effects of military funding and the strong community of (optical) astronomers, will be discussed.

Sullivan, W. T., III

1996-05-01

129

Network Development of the Pushchino Radio Astronomy Observatory of ASC LPI  

NASA Astrophysics Data System (ADS)

All main changes in the network of the Pushchino Radio Astronomy Observatory has been related to introduction of the buffer data center in the recent years, upgrading internal and external communication channels and the exploitation of ip-telephony.

Dumsky, D. V.; Isaev, E. A.; Pugachev, V. D.; Samodurov, V. A.; Likhachev, S. F.; Shatskaya, M. V.; Kitaeva, M. A.

130

Broad band antenna arrays and noise coupling for radio astronomy  

NASA Astrophysics Data System (ADS)

In radio astronomy radio telescopes that use large spherical or parabolic reflector antennas are often used. They contain cryogenic cooling to lower the noise temperature of the antennas, which makes the antennas expensive to build and maintain. A next generation radio telescope that uses a phased array antenna instead of the reflector type antennas has been proposed. The collecting area of the telescope is proposed to be one square kilometer and the frequency range from 200 MHz to 2 GHz. There are several advantages to a phased array radio telescope, as well as some potential difficulties that arise in its design. A phased array can have more than one beam, allowing astronomers to view multiple objects at the same time, and using analog and digital beam forming will allow for the active suppression of both mobile and stationary noise sources. Moreover, the large collecting area allows for higher noise temperature of the antenna, while still maintaining a high sensitivity. On the other hand, one disadvantage of the phased array is the potential for noise coupling that occurs when noise generated by LNAs in one antenna element is received by its neighboring elements, adding to the total noise of the telescope. The first step in the design of the Square Kilometer Array (SKA) is the design of the sub-arrays. The sub- arrays are one square-meter dual polarized antenna arrays with an operating frequency from 200 MHz to 2 GHz. The sub-arrays elements must have broad beamwidth so that the array will have a large scan-angle and a low amount of coupling. The low coupling is important for the scan- impedance of the array, as well as its noise performance. In this thesis several antenna elements are studied, designed and built, including wire; log-periodic; slotline Vivaldi; and antipodal Vivaldi antennas. A twenty-element sub-array using the antipodal Vivaldi antenna element is designed and fabricated. Noise coupling in antenna arrays was first observed in the Westerbork Radio Synthesis Telescope (WRST). A higher noise power than was predicted was measured when the antenna was directed at a cold region of the sky. This noise power was attributed to noise coupling between two elements in the feed of the antennas parabolic reflector. In a phased array where all the array elements are placed close together the coupling between them can be large, which will also increase the noise coupling in the array. A detailed analysis of the noise coupling of a phased array is performed. This analysis will lead to an analytical solution for the noise coupling in a phased array.

Peeters Weem, Jan Peter

131

Results from the Astronomy Diagnostic Test National Project  

Microsoft Academic Search

The Astronomy Diagnostic Test (ADT) is the first research-based assessment tool developed for use in undergraduate introductory astronomy classrooms. The ADT National Project has rigorously measured reliability and validity through the collection and analysis of a large sample of student ADT results.

Grace L. Deming

2002-01-01

132

Under the Radar: The First Woman in Radio Astronomy, Ruby Payne-Scott  

NASA Astrophysics Data System (ADS)

Under the Radar, the First Woman in Radio Astronomy, Ruby Payne-Scott W. Miller Goss, NRAO Socorro NM Ruby Payne-Scott (1912-1981) was an eminent Australian scientist who made major contributions to the WWII radar effort (CSIR) from 1941 to 1945. In late 1945, she pioneered radio astronomy efforts at Dover Heights in Sydney, Australia at a beautiful cliff top overlooking the Tasman Sea. Again at Dover Heights, Payne-Scott carried out the first interferometry in radio astronomy using an Australian Army radar antenna as a radio telescope at sun-rise, 26 January 1946. She continued these ground breaking activities until 1951. Ruby Payne-Scott played a major role in discovering and elucidating the properties of Type III bursts from the sun, the most common of the five classes of transient phenomena from the solar corona. These bursts are one of the most intensively studied forms of radio emission in all of astronomy. She is also one of the inventors of aperture synthesis in radio astronomy. I examine her career at the University of Sydney and her conflicts with the CSIR hierarchy concerning the rights of women in the work place, specifically equal wages and the lack of permanent status for married women. I also explore her membership in the Communist Party of Australia as well as her partially released Australian Scientific Intelligence Organization file. Payne-Scott’s role as a major participant in the flourishing radio astronomy research of the post war era remains a remarkable story. She had a number of strong collaborations with the pioneers of early radio astronomy in Australia: Pawsey, Mills, Christiansen, Bolton and Little. I am currently working on a popular version of the Payne-Scott story; “Making Waves, The Story of Ruby Payne-Scott: Australian Pioneer Radio Astronomer” will be published in 2013 by Springer in the Astronomers’ Universe Series.

Miller Goss, W.

2012-05-01

133

Research on Haystack radiometer, 20-24 GHz maser, and radio astronomy programs  

NASA Technical Reports Server (NTRS)

During the first half of 1973, the Haystack antenna was utilized 76% of the time. Of this useful time, 72% was devoted to radio astronomy observing, 5% was spent on radar-related research and 23% went into maintenance and system improvements. Twenty-eight new radio astronomy programs were accepted, eight of which were completed during the period. One new radar program, topographic observations of Mars, was started in June and will be completed early in 1974. Fourteen programs continued from the previous period were also defined as complete. As of 1 July, 28 ratio observing programs were in a continuing status on the Haystack books. Four radar projects were also continuing. The 20-24 GHz maser development described in the preceding report progressed very well during an on-antenna test phase which began early in the year, but which terminated unfortunately in June with the complete loss of gain in the maser. Investigation of this problem is in progress. During this on-antenna test phase, the most sensitive water vapor observing capability which has yet become available was demonstrated.

1973-01-01

134

Moon-based Very Long-Wavelength Radio Astronomy Facility: science drives and technological challenges  

NASA Astrophysics Data System (ADS)

Scientific laboratories at manned and un-manned Moon bases are top priorities for the next wave of exploratory missions. Environmental conditions on the Moon are beneficial for various types of experimental research. Very Long Wavelength radio Astronomy (VLWA) is among the most attractive scientific disciplines for the suit of Moon-based laboratories. Space science has revolutionised astronomy by opening up several hitherto inaccessible windows in the spectrum. The opening of each new spectral window has resulted in unexpected discoveries and made it possible to obtain a comprehensive picture of physical processes in celestial sources. One of the last remaining unexplored regions of the spectrum is at the lowest radio frequencies. Radio emission below 15 MHz (wavelengths longer than 20 m) is inaccessible from the Earth surface due to absorption and scattering in the ionosphere. Unique new science areas for VLWA studies include: (i)Investigation of radio sky at so far inaccessible regime of electromagnetic radiation; (ii) Cosmological "experiments" with "fossil" relativistic electrons; (iii) Investigation of ultra-high-energy cosmic rays via VLWA emission from particle interactions with the Moon; (iv) Solar system "weather", including coronal mass ejections, (v) Searches for Jupiter-like exoplanets. In addition to the astrophysical tasks mentioned above, the VLWA facility on the Moon can be implemented as a Wide Area Network, as pioneered by the Earth-based Low Frequency Array (LOFAR). This allows the inclusion of other sensors, such as seismic detectors to conduct selenological studies. The LOFAR is being constructed in the Netherlands. It will operate in the frequency range 20 - 220 MHz. Several other projects will aim at addressing cosmological problems by studying the Universe at the range of frequencies below 100 MHz. These and other new radio astronomy facilities will lay the scientific and technological ground for VLWA in space. We will present a multi-step approach toward creating a permanent VLWA observatory on the Moon. Its first phase would include a demonstrator to be deployed as a small-scale scientific payload onboard one of the lunar missions of the next decade. A concept of an affordable fullscale observatory will be presented in the context of a long-term Moon exploration programme.

Gurvits, Leonid

135

Presented at "RFI2004: Workshop on Mitigation of Radio Frequency Interference in Radio Astronomy"; Penticton, Canada, 16-18 July 2004  

E-print Network

of the large financial investment foreseen in the Square Kilometre Array (SKA) radio telescope, it will need the radio frequency bands allocated for astronomical use. Radio telescopes are very sensitive, and their farPresented at "RFI2004: Workshop on Mitigation of Radio Frequency Interference in Radio Astronomy

Ellingson, Steven W.

136

Planetary radio astronomy observations from Voyager-2 near Saturn  

NASA Technical Reports Server (NTRS)

Voyager-2 planetry radio astronomy measurements obtained near Saturn are discussed. They indicate that Saturnian kilometric radiation is emitted by a strong, dayside source at auroral latitudes in the northern hemisphere and by a weaker (by more than an order of magnitude) source at complementary latitudes in the southern hemisphere. These emissions are variable both due to Saturn's rotation and, on longer time scales, probably due to influences of the solar wind and the satellite Dione. The Saturn electrostatic discharge bursts first discovered by Voyager-1 and attributed to emissions from the B-ring were again observed with the same broadband spectral properties and a 10(h)11(m) + or - 5(m) episodic recurrence period but with an occurrence frequency of only of about 30 percent of that detected with Voyager-1. During the crossing of the ring plane at a distance of 2.88 R sub S, an intense noise event is interpreted to be consequence of the impact/vaporization/ionization of charged micron-size G-ring particles distributed over a total vertical thickness of about 1500 km.

Warwick, J. W.; Evans, D. R.; Romig, J. H.; Alexander, J. K.; Desch, M. D.; Kaiser, M. L.; Aubier, M.; Leblanc, Y.; Lecacheux, A.; Pedersen, B. M.

1981-01-01

137

Project StORe: Astronomy Report   

E-print Network

In many ways, digital astronomy is at the forefront of issues related to data curation, given the existing experience with generating large amounts of data in raw form, and significant quantities of derived data in ...

Choudhury, Sayeed; Hanisch, Robert; Stewart, Rowena

2006-01-01

138

Cosmic Noise: The Pioneers of Early Radio Astronomy and Their Discoveries  

NASA Astrophysics Data System (ADS)

Extraterrestrial radio waves (the galactic background), often referred to as "cosmic noise", were first detected accidentally by Karl Jansky at a frequency of 20 MHz in 1932, with significant followup by Grote Reber. Yet after World War II it was England and Australia that dominated the field. An entirely different sky from that of visual astronomy was revealed by the discoveries of solar noise, "radio stars” (discrete sources such as Cas A, Tau A, Cyg A, Cen A and Vir A), galactic noise, lunar and meteor radar experiments, the detection of the 21 cm hydrogen line, and eventually optical identifications such as the Crab Nebula and M87. Key players included wartime radar experts such as Stanley Hey (the British Army's Operational Research Group), Martin Ryle (Cambridge University), Bernard Lovell (Jodrell Bank) and Joe Pawsey (Radiophysics Lab, Sydney). Younger leaders also emerged such as Graham Smith, Tony Hewish, John Davies, "Chris" Christiansen, Bernie Mills, Paul Wild, and John Bolton. Some optical astronomers (Jan Oort, Henk van de Hulst, Jesse Greenstein, Rudolph Minkowski, and Walter Baade) were also extremely supportive. By the end of the postwar decade, radio astronomy was firmly established within the gamut of astronomy, although very few of its practitioners had been trained as astronomers. I will also trace the technical and social aspects of this wholly new type of astronomy, with special attention on military and national influences. I argue that radio astronomy represents one of the key developments in twentieth century astronomy not only because of its own discoveries, but also its pathfinding for the further opening the electromagnetic spectrum. This study is based on exhaustive archival research and over one hundred interviews with pioneering radio astronomers. Full details are available in the book "Cosmic Noise: A History of Early Radio Astronomy" (Cambridge Univ. Pr.).

Sullivan, Woodruff T., III

2012-01-01

139

Infrared Submillimeter and Radio Astronomy Research and Analysis Program  

NASA Technical Reports Server (NTRS)

This program entitled "Infrared Submillimeter and Radio Astronomy Research and Analysis Program" with NASA-Ames Research Center (ARC) was proposed by the Smithsonian Astrophysical Observatory (SAO) to cover three years. Due to funding constraints only the first year installment of $18,436 was funded, but this funding was spread out over two years to try to maximize the benefit to the program. During the tenure of this contact, the investigators at the SAO, Drs. Wesley A. Traub and Nathaniel P. Carleton, worked with the investigators at ARC, Drs. Jesse Bregman and Fred Wittebom, on the following three main areas: 1. Rapid scanning SAO and ARC collaborated on purchasing and constructing a Rapid Scan Platform for the delay arm of the Infrared-Optical Telescope Array (IOTA) interferometer on Mt. Hopkins, Arizona. The Rapid Scan Platform was tested and improved by the addition of stiffening plates which eliminated a very small but noticeable bending of the metal platform at the micro-meter level. 2. Star tracking Bregman and Wittebom conducted a study of the IOTA CCD-based star tracker system, by constructing a device to simulate star motion having a specified frequency and amplitude of motion, and by examining the response of the tracker to this simulated star input. 3. Fringe tracking. ARC, and in particular Dr. Robert Mah, developed a fringe-packet tracking algorithm, based on data that Bregman and Witteborn obtained on IOTA. The algorithm was tested in the laboratory at ARC, and found to work well for both strong and weak fringes.

Traub, Wesley A.

2000-01-01

140

Background radio-frequency radiation and its impact on radio astronomy Michelle C. Storey, Bruce MacA Thomas and John M. Sarkissian  

E-print Network

1 Background radio-frequency radiation and its impact on radio astronomy Michelle C. Storey, Bruce 1710 Email:mstorey@atnf.csiro.au Abstract: The use of radio-frequency telecommunications equipment is dramatically increasing, and one consequence is that background levels of radio-frequency radiation

Sarkissian, John M.

141

Investigation on the Frequency Allocation for Radio Astronomy at the L Band  

NASA Astrophysics Data System (ADS)

In this paper, the frequency allocation reserved for radio astronomy in the L band set by the International Telecommunication Union (ITU), which is between 1400 and 1427 MHz, is reviewed. We argue that the nearby frequencies are still very important for radio astronomers on the ground by investigating radio objects (H i sources) around 1300-1500 MHz. The L-band window is separated into a group of four windows, namely 1400-1427 MHz (window A), 1380-1400 MHz (window B), 1350-1380 MHz (window C), and 1300-1350 MHz (window D). These windows are selected according to their redshifts from a rest frequency for hydrogen spectral line at 1420.4057 MHz. Radio objects up to z ? 0.1 or frequency down to 1300 MHz are examined. We argue that since window B has important radio objects within the four windows, this window should also be given to radio astronomy. They are galaxies, spiral galaxies, and galaxy clusters. This underlines the significance of window B for radio astronomers on the ground. By investigating the severeness of radio frequency interference (RFI) within these windows, we have determined that window B still has significant, consistent RFI. The main RFI sources in the four windows have also been identified. We also found that the Department of Civil Aviation of Malaysia is assigned a frequency range of 1215-1427 MHz, which is transmitted within the four windows and inside the protected frequency for radio astronomy. We also investigated the RFI in the four windows on proposed sites of future radio astronomy observatories in Malaysia and Thailand and found the two best sites as Universiti Pendidikan Sultan Idris (UPSI) and Ubon Ratchathani, respectively. It has also been determined that RFI in window B increases with population density.

Abidin, Z. Z.; Umar, R.; Ibrahim, Z. A.; Rosli, Z.; Asanok, K.; Gasiprong, N.

2013-09-01

142

Solar System Radio Astronomy at The College of New Jersey  

NASA Astrophysics Data System (ADS)

Our group at The College of New Jersey built a double dipole radio telescope as a contribution to NASA's Radio JOVE Program. We present observations of flares from Jupiter and the Sun and we give a brief description of the dominant physical mechanisms producing the radio waves from these two dominant sources of solar system radio emission. More recently we have built a basic radio interferometer with an 80 m baseline using two of these Radio JOVE double-dipoles. We describe the principles of interferometry as applicable to this telescope and present preliminary measurements made with this simple interferometer.

Benigno, Joseph

2012-03-01

143

Voyager 1 planetary radio astronomy observations near Jupiter  

Microsoft Academic Search

Results are reported from the first low frequency radio receiver to be transported into the Jupiter magnetosphere. Dramatic new information was obtained both because Voyager was near or in Jupiter's radio emission sources and also because it was outside the relatively dense solar wind plasma of the inner solar system. Extensive radio arcs, from above 30 MHz to about 1

J. W. Warwick; J. B. Pearce; A. C. Riddle; J. K. Alexander; M. D. Desch; M. L. Kaiser; J. R. Thieman; T. B. Carr; S. Gulkis; A. Boischot; C. C. Harvey; B. M. Pedersen

1979-01-01

144

Terrestrial Interference Effects on Space-Based Low Frequency Radio Astronomy  

Microsoft Academic Search

Radio astronomy observations in the HF (1-30 MHz) portion of the electromagnetic spectrum could result in new insights into astrophysical processes. However, this particular part of the spectrum is mostly inaccessible from the ground due to the effects of the Earth's ionosphere. One solution is to observe from Earth orbit, thereby avoiding most of the absorption and phase distortions from

J. P. Basart; M. McCoy

1994-01-01

145

Plasma Diagnostics of the Interstellar Medium with Radio Astronomy  

NASA Astrophysics Data System (ADS)

We discuss the degree to which radio propagation measurements diagnose conditions in the ionized gas of the interstellar medium (ISM). The "signal generators" of the radio waves of interest are extragalactic radio sources (quasars and radio galaxies), as well as Galactic sources, primarily pulsars. The polarized synchrotron radiation of the Galactic non-thermal radiation also serves to probe the ISM, including space between the emitting regions and the solar system. Radio propagation measurements provide unique information on turbulence in the ISM as well as the mean plasma properties such as density and magnetic field strength. Radio propagation observations can provide input to the major contemporary questions on the nature of ISM turbulence, such as its dissipation mechanisms and the processes responsible for generating the turbulence on large spatial scales. Measurements of the large scale Galactic magnetic field via Faraday rotation provide unique observational input to theories of the generation of the Galactic field.

Haverkorn, Marijke; Spangler, Steven R.

2013-10-01

146

Plasma Diagnostics of the Interstellar Medium with Radio Astronomy  

NASA Astrophysics Data System (ADS)

We discuss the degree to which radio propagation measurements diagnose conditions in the ionized gas of the interstellar medium (ISM). The "signal generators" of the radio waves of interest are extragalactic radio sources (quasars and radio galaxies), as well as Galactic sources, primarily pulsars. The polarized synchrotron radiation of the Galactic non-thermal radiation also serves to probe the ISM, including space between the emitting regions and the solar system. Radio propagation measurements provide unique information on turbulence in the ISM as well as the mean plasma properties such as density and magnetic field strength. Radio propagation observations can provide input to the major contemporary questions on the nature of ISM turbulence, such as its dissipation mechanisms and the processes responsible for generating the turbulence on large spatial scales. Measurements of the large scale Galactic magnetic field via Faraday rotation provide unique observational input to theories of the generation of the Galactic field.

Haverkorn, Marijke; Spangler, Steven R.

147

Supporting the Outdoor Classroom: An Archaeo-Astronomy Project  

ERIC Educational Resources Information Center

Field trips and the outdoor classroom are a vital part of many areas of education. Ideally, the content should be taught within a realistic environment rather than just by providing a single field trip at the end of a course. The archaeo-astronomy project located at Nottingham Trent University envisages the development of a virtual environment…

Brown, Daniel; Francis, Robert; Alder, Andy

2013-01-01

148

New Mexico Fiber-Optic Link Marks Giant Leap Toward Future of Radio Astronomy  

NASA Astrophysics Data System (ADS)

SOCORRO, NM -- Scientists and engineers at the National Radio Astronomy Observatory (NRAO) have made a giant leap toward the future of radio astronomy by successfully utilizing the Very Large Array (VLA) radio telescope in conjunction with an antenna of the continent-wide Very Long Baseline Array (VLBA) using the longest fiber-optic data link ever demonstrated in radio astronomy. The 65-mile fiber link will allow scientists to use the two National Science Foundation (NSF) facilities together in real time, and is the first step toward expanding the VLA to include eight proposed new radio-telescope antennas throughout New Mexico. LEFT: Miller Goss, NRAO's director of VLA/VLBA Operations, unveils graphic showing success of the Pie Town-VLA fiber link. The project, funded by the NSF and Associated Universities, Inc. (AUI), which operates NRAO for the NSF, links the VLA and the VLBA antenna in Pie Town, NM, using a Western New Mexico Telephone Co. fiber-optic cable. The successful hookup was announced at a ceremony that also marked the 10th anniversary of NRAO's Operations Center in Socorro. "Linking the Pie Town antenna to the VLA quadruples the VLA's ability to make detailed images of astronomical objects," said Paul Vanden Bout, NRAO's Director. "This alone makes the link an advance for science, but its greater importance is that it clearly demonstrates the technology for improving the VLA's capabilities even more in the future." "Clearly, the big skies and wide open spaces in New Mexico create near perfect conditions for the incredible astronomical assets located in our state. This new fiber-optic link paves the way for multiplying the already breathtaking scientific capabilities of the VLA," Senator Pete Domenici (R-NM) said. The VLA is a system of 27 radio-telescope antennas distributed over the high desert west of Socorro, NM, in the shape of a giant "Y." Made famous in movies, commercials and numerous published photos, the VLA has been one of the most productive and versatile astronomical observatories in the world since its dedication in 1980. The VLBA is a continent-wide system of 10 radio telescopes distributed across the continental United States, Hawaii and St. Croix in the Caribbean. In both the VLA and VLBA, the cosmic radio waves received by each antenna are combined with those received from every other antenna in the system to produce images with extremely great resolving power, or ability to see fine detail. The more widely separated the antennas, the greater the resolving power. The greatest separation between antennas of the VLA is 20 miles; in the VLBA, 5,000 miles. If your eyes could see the same level of detail as the VLA, you could, at the distance from New York to Los Angeles, make out an object the size of a small car. With the resolving power of the VLBA, you could read the owner's manual. The VLBA can make images hundreds of times more detailed than those available from the Hubble Space Telescope. However, because of the way in which such multi-antenna radio telescopes, called interferometers, work, there is a gap between the levels of detail obtainable with the VLA and the VLBA. Linking the VLA to the VLBA Pie Town antenna is the first step toward filling in that gap and allowing astronomers to see all scales of structure -- small, medium-sized, and large -- in objects such as stars, galaxies and quasars. Additional antennas, distributed throughout New Mexico, would fully fill that gap. Adding the new antennas to the VLA "would provide the capability to image astronomical objects on all spatial scales, from the very largest to the very smallest. The combination of the VLA and VLBA then would be the only single instrument in astronomy covering such a range of spatial scales, and thus a tool of great and unique value to science," said Vanden Bout. LEFT: NRAO Director Paul Vanden Bout, left, speaks with U.S. Senator Pete Domenici, right, following the ceremony at the Array Operations Center in Socorro Dec. 15. Nobel Laureate Robert Wilson is in the ba

1998-12-01

149

The Inwood Astronomy Project: Ready for IYA 2009  

NASA Astrophysics Data System (ADS)

The Inwood Astronomy Project begins its mission of "100 Nights of Astronomy", an outreach program for the IYA 2009 in New York City. While the city lights may at first glance be a major deterrent to amateur and educational night-sky viewing, the author describes numerous community-based initiatives designed to fit into a racially and ethnically diverse neighborhood of Northern Manhattan and the Bronx, which all give a deeper understanding and appreciation of and for the night sky. The author presents ways for professional astronomers to use their light-polluted cities and towns for the same purpose.

Shilling Kendall, Jason

2009-01-01

150

MITIGATION OF CONTINUOUS INTERFERENCE IN RADIO ASTRONOMY USING SPATIAL FILTERING  

E-print Network

@astron.nl The contamination of radio astronomical measurements by man-made Radio Frequency Interference (RFI) is becoming-frequency detection and blanking. Contin- ually present interferers cannot be cut out in the time-frequency plane and have to be removed using spatial filtering. One technique is based on the estimation of the spatial

van der Veen, Alle-Jan

151

The First Steps of Radio Astronomy in Czestochowa  

NASA Astrophysics Data System (ADS)

In the paper, technical documentation and the principle of operation is presented. "KLAUDIA" radio telescope was built in Rabka in 2007 and it is used to receive secondary radio waves, emitted by the Earth's ionosphere at frequency of 40 kHz.

Jarosik, M.; Starzy?ski, S.; Szcze?niak, M.; Szcze?niak, R.; Ceglarek, A.

2007-12-01

152

Radio Astronomy Working Group for SEAAN and RFI Survey in INSTUN, Perak  

NASA Astrophysics Data System (ADS)

The South East Asia Astronomy Network (SEAAN) was established in 2006 at the Special Session of Astronomy for Developing World during the IAU General Assembly in Prague. It held its first meeting in 2007 at the Thai National Astronomy Meeting in Bangkok, Thailand. It aims to establish effective mechanisms for nurturing and sharing the development and experiences in astronomy research and education among SEA countries. This working group has a main objective of putting South East Asia on the map of the global radio astronomy community. This paper will discuss the working group's short-term and long-term goals. This paper will also discuss the results of the latest Radio Frequency Interference (RFI) study in Malaysia, particularly the survey at Institut Tanah dan Ukur Negara (INSTUN) in Perak. The RFI level at that site is measured at -94.312 (+/-0.999) dBm or 11.065 (+/-1.505) ?V on average, which is considered quite well when compared to the best site in Malaysia, which is Langkawi (-100.352 +/-0.036) dBm or 2.192 lp+/-0.019) ?V on average).

Abidin, Zamri Zainal; Ibrahim, Zainol Abidin; Rosli, Zulfazli; Malim, Siti Fatin Fathinah; Anim, Norsuzian Mohd

2010-07-01

153

Astro-Venture Astronomy Unit: Final Project  

NSDL National Science Digital Library

This is a lesson about habitable planets. Learners will discuss what they know about the astronomical conditions of the planets they have found in earlier lessons and what they still need to know in order to determine if they are habitable to humans. They research possible methods for answering these questions and write a proposal on how and why their planet should be further researched. The lesson models scientific inquiry using the 5E instructional model and includes teacher notes, prerequisite concepts, common misconceptions, student journal and reading. This is lesson 14, the concluding lesson, in the Astro-Venture Astronomy Unit. The lessons are designed for educators to use in conjunction with the Astro-Venture multimedia modules.

2012-12-06

154

Virtual reality and project management for astronomy  

NASA Astrophysics Data System (ADS)

Over the years astronomical instrumentation projects are becoming increasingly complex making necessary to find efficient ways for project communication management. While all projects share the need to communicate project information, the required information and the methods of distribution vary widely between projects and project staff. A particular problem experienced on many projects regardless of their size, is related to the amount of design, planning information and how that is distributed among the project stakeholders. One way to improve project communications management is to use a workflow that offers a predefined way to share information in a project. Virtual Reality (VR) offers the possibility to get a visual feedback of designed components without the expenses of prototype building, giving an experience that mimics real life situations using a computer. In this contribution we explore VR as a communication technology that helps to manage instrumentation projects by means of a workflow implemented on a software package called Discut designed at Universidad Nacional Autónoma de Mexico (UNAM). The workflow can integrate VR environments generated as CAD models.

Martínez, L. A.; Villarreal, J. L.; Angeles, F.; Bernal, A.; Bribiesca, E.; Flores, R.

2010-07-01

155

Voyager 1 planetary radio astronomy observations near Jupiter  

NASA Technical Reports Server (NTRS)

Results from the first low-frequency radio receiver to be transported into the Jupiter magnetosphere are reported. Dramatic new information was obtained, both because Voyager was near or in Jupiter's radio emission sources and because it was outside the relatively dense solar wind plasma of the inner solar system. Extensive radio spectral arcs, from above 30 to about 1 MHz, occurred in patterns correlated with planetary longitude. A newly discovered kilometric wavelength radio source may relate to the plasma torus near Io's orbit. In situ wave resonances near closest approach define an electron density profile along the Voyager trajectory and form the basis for a map of the torus. Detailed studies are in progress and are outlined briefly.

Warwick, J. W.; Pearce, J. B.; Riddle, A. C.; Alexander, J. K.; Desch, M. D.; Kaiser, M. L.; Thieman, J. R.; Carr, T. D.; Gulkis, S.; Boischot, A.

1979-01-01

156

Voyager 1 Planetary Radio Astronomy Observations Near Jupiter  

NASA Technical Reports Server (NTRS)

Results are reported from the first low frequency radio receiver to be transported into the Jupiter magnetosphere. Dramatic new information was obtained both because Voyager was near or in Jupiter's radio emission sources and also because it was outside the relatively dense solar wind plasma of the inner solar system. Extensive radio arcs, from above 30 MHz to about 1 MHz, occurred in patterns correlated with planetary longitude. A newly discovered kilometric wavelength radio source may relate to the plasma torus near Io's orbit. In situ wave resonances near closest approach define an electron density profile along the Voyager trajectory and form the basis for a map of the torus. Studies in progress are outlined briefly.

Warwick, J. W.; Pearce, J. B.; Riddle, A. C.; Alexander, J. K.; Desch, M. D.; Kaiser, M. L.; Thieman, J. R.; Carr, T. B.; Gulkis, S.; Boischot, A.

1979-01-01

157

New Book Recounts Exciting, Colorful History Of Radio Astronomy in Green Bank, West Virginia  

NASA Astrophysics Data System (ADS)

A new book published by the National Radio Astronomy Observatory (NRAO) tells the story of the founding and early years of the Observatory at Green Bank, West Virginia. But it was Fun: the first forty years of radio astronomy at Green Bank, is not a formal history, but rather a scrapbook of early memos, recollections, anecdotes and reports. But it was Fun... is liberally illustrated with archival photographs. It includes historical and scientific papers from symposia held in 1987 and 1995 to celebrate the birthdays of two of the radio telescopes at the Observatory. Book cover The National Radio Astronomy Observatory was formed in 1956 after the National Science Foundation decided to establish an observatory in the eastern United States for the study of faint radio signals from distant objects in the Universe. But it was Fun... reprints early memos from the group of scientists who searched the mountains for a suitable site -- an area free from radio transmitters and other sources of radio interference -- "in a valley surrounded by as many ranges of high mountains in as many directions as possible," which was "at least 50 miles distant from any city or other concentration of people." The committee settled on Green Bank, a small village in West Virginia, and the book documents the struggles that followed to create a world-class scientific facility in an isolated area more accustomed to cows than computers. Groundbreaking at the Observatory, then a patchwork of farms and fields, took place in October 1957, only a few days after the launch of Sputnik by the Soviet Union. A year later, Green Bank's first telescope was dedicated, and the book contains a transcription of speeches given at that ceremony, when the Cold War, the space race and America's scientific stature were issues of the hour. The centerpiece of the new Observatory was to be a highly-precise radio telescope 140 feet in diameter, but it was expected that it would soon be surpassed by dishes of much greater size. The book reprints internal memos, reports, and recollections of astronomers who were there, as the initial elation turned to frustration when the 140 Foot Telescope project became mired in technical difficulties, plans for larger dishes were put on hold, and the scientific staff of the fledgling Observatory struggled to create a National Observatory with inadequate equipment in a very remote location. Articles by David Heeschen and John Findlay tell the story of the creation of the 300 Foot Telescope, at that time the largest in the world, which went from initial concept to full operation in only 23 months, and began a rich life of research that put the NRAO on the world scientific map. The 300 Foot Telescope was originally intended to be an interim instrument, but as documented in the book, demand for its use was so high that it was kept in operation long after its initial planned retirement, with regular upgrades and new generations of electronics. The sudden collapse of the 300 Foot Telescope on a calm evening after 26 years of operation shocked the astronomical community. But it was Fun... features dramatic first-hand accounts by the people who were there that night: the telescope operator who found himself under a falling structure; the Observatory staff who at first could not believe what happened, and those who worked during the night and into the next day to secure the area, preserve information on what happened, and deal with the rush of publicity. The book includes extensive photographs and the Executive Summary Report of the panel which was commissioned to investigate the collapse and its implication for the design of other large radio telescopes. But it was Fun... will appeal to a variety of audiences. Historians of science will be interested in the articles by David Heeschen, Gerald Tape, and Hugh van Horn, on the evolution of the concept of a National Observatory, and the difficulties of putting the concepts into practice in Green Bank. Those interested in astronomical discovery will find fascinating and highly personal a

2007-07-01

158

Astronomy Remote Observing Research Projects of US High School Students  

NASA Astrophysics Data System (ADS)

In order to address the challenging climate for promoting astronomy education in the high schools we have used astronomy projects to give students authentic research experiences in order to encourage their pursuit of science and technology careers. Initially, we conducted teacher workshops to develop a cadre of teachers who have been instrumental in recruiting students to work on projects. Once identified, these students have been motivated to conduct astronomy research projects with appropriate guidance. Some have worked on these projects during non-school hours and others through a research course. The goal has been for students to meet the objectives of inquiry-based learning, a major US National Science Standard. Case studies will be described using event-based learning with the NASA Deep Impact mission. Hawaii students became active participants investigating comet properties through the NASA Deep Impact mission. The Deep Impact Education and Public Outreach group developed materials which were used by our students. After learning how to use image processing software, these students obtained Comet 9P/ Tempel 1 images in real time from the remote observing Faulkes Telescope North located on Haleakala, Maui for their projects. Besides conducting event-based projects which are time critical, Oregon students have worked on galaxies and sunspots projects. For variable star research, they used images obtained from the remote observing offline mode of Lowell Telescope located in Flagstaff, Arizona. Essential to these projects has been consistent follow-up required for honing skills in observing, image processing, analysis, and communication of project results through Science Fair entries. Key to our success has been the network of professional and amateur astronomers and educators collaborating in a multiplicity of ways to mentor our students. This work-in-progress and process will be shared on how to inspire students to pursue careers in science and technology with these projects.

Kadooka, M.; Meech, K. J.

2006-08-01

159

From the Beginning: Archiving the History of NRAO and US Radio Astronomy  

NASA Astrophysics Data System (ADS)

In 2006 the National Radio Astronomy Observatory will celebrate its 50th anniversary. Before 2003, there were neither archives nor a formal archiving program at NRAO; institutional records were located at any of the four NRAO sites in four different states, and there was no record of the materials that we had. In mid-2003, the long-time NRAO librarian retired and began part time work as NRAO's first archivist. With the completion of an addition to the headquarters building in Charlottesville in spring 2005, the fledgling NRAO Archives moved into a new 1400 sq ft space. In addition to NRAO materials, the Archives also collects papers of individuals. Grote Reber, who built the first radio telescope in his backyard in Wheaton IL in 1937, had in 1995, donated many of his personal papers to NRAO, and these papers have been indexed and are available to researchers. We continue to receive additional materials from his estate in Tasmania. The complete papers of John Kraus, author, researcher, and professor in radio astronomy and engineering at Ohio State University for many years, were donated to the NRAO Archives by his son and estate executor in spring 2005. The NRAO Archives has also mounted Web resources with texts written by Nan Dieter Conklin and by Doc Ewen describing their work in the developing years of US radio astronomy. This talk will present the highlights of how, on a limited budget but with broad support of NRAO staff, the NRAO Archives has begun a program to gather and organize materials on institutional history as well as the personal papers and recollections of contributors to US radio astronomy history.

Bouton, E. N.

2005-12-01

160

Multiphase turbulent interstellar medium: some recent results from radio astronomy  

E-print Network

The radio frequency 1.4 GHz transition of the atomic hydrogen is one of the important tracers of the diffuse neutral interstellar medium. Radio astronomical observations of this transition, using either a single dish telescope or an array interferometer, reveal different properties of the interstellar medium. Such observations are particularly useful to study the multiphase nature and turbulence in the interstellar gas. Observations with multiple radio telescopes have recently been used to study these two closely related aspects in greater detail. Using various observational techniques, the density and the velocity fluctuations in the Galactic interstellar medium was found to have a Kolmogorov-like power law power spectra. The observed power law scaling of the turbulent velocity dispersion with the length scale can be used to derive the true temperature distribution of the medium. Observations from a large ongoing atomic hydrogen absorption line survey have also been used to study the distribution of gas at d...

Roy, Nirupam

2015-01-01

161

NATIONAL RADIO ASTRONOMY OBSERVATORY Green Bank, West Virginia  

E-print Network

-cycle refrigerator is used to remove the heat. Thus, the cryogenic system is a crucial element governing a receiver, Mean Time Between Failures and Refrigeration Table 2, Design Chart for 0-ring Face Seal Glands . Table 25 26 4 27 21 28 29 30 31 2 #12;1.0 Introduction The first elements in the signal path of a radio

Groppi, Christopher

162

Workshop on Satellite Power Systems (SPS) effects on optical and radio astronomy  

SciTech Connect

The impacts of the SPS on astronomy were concluded to be: increased sky brightness, reducing the effective aperture of terrestrial telescopes; microwave leakage radiation causing erroneous radioastronomical signals; direct overload of radioastronomical receivers at centimeter wavelengths; and unintentional radio emissions associated with massive amounts of microwave power or with the presence of large, warm structures in orbit causing the satellites to appear as individual stationary radio sources; finally, the fixed location of the geostationary satellite orbits would result in fixed regions of the sky being unusable for observations. (GHT)

Stokes, G.M.; Ekstrom, P.A. (eds.)

1980-04-01

163

Computational Intelligence in Radio Astronomy: Using Computational Intelligence Techniques to Tune Geodesy Models  

Microsoft Academic Search

In this paper a number of popular Computational Intelligence (CI) algorithms are used to tune Geodesy models, a radio astronomy\\u000a problem. Several single and multiple objective variations of the Geodesy problem are examined with good results obtained using\\u000a state-of-the-art CI algorithms. These novel applications are used to develop insights into methods for applying CI algorithms\\u000a to unknown problem domains and

Daniel Angus; Adam Deller

2008-01-01

164

Reference antenna-based subspace tracking for RFI mitigation in radio astronomy  

NASA Astrophysics Data System (ADS)

Interference mitigation is becoming necessary to make radio astronomy work in bands that are heavily used to support our modern lives. It is becoming particularly difficult to work at frequencies between 1100 MHz and 1300 MHz that are rapidly filling up with satellite navigation signals. Antenna array radio telescopes present the possibility of applying spatial Radio Frequency Interference (RFI) mitigation. Spatial filtering techniques for RFI mitigation have been introduced to radio astronomy in the last decades. The success of these techniques relies on accurately estimating the RFI spatial signature (or RFI subspace). The use of a reference antenna steering at the RFI sources provides a good estimation of the RFI subspace when correlated with an array radio telescope. However, predicting the evolution of this subspace with time is necessary in a multiple RFI scenario, when only a single RFI source can be monitored at a time with the reference antenna. This paper introduces a subspace tracking approach, based on the power method applied to covariance data. The RFI spatial signature estimates provided by the reference antenna are used to initialize the power method to support a faster convergence. Practical examples are shown, applying the method to real data from a single 188 element phased array feed designed for the Australian Square Kilometre Array Pathfinder (ASKAP) telescope.

Hellbourg, G.; Chippendale, A. P.; Kesteven, M. J.; Jeffs, B. D.

2014-12-01

165

Astronomy  

NSDL National Science Digital Library

This page contains links to one pagers on historical instruments of astronomy with photos of the following : Astronomy Slides, Celestial Globe, Cometarium, Globe, Gregorian Telescope, Kepler's Laws Demonstration, Orrery, Planetarium, Planisphere, Stereoscopic Pictures of the Moon, Tellurian, and Transit.

2000-01-01

166

Building information models for astronomy projects  

NASA Astrophysics Data System (ADS)

A Building Information Model is a digital representation of physical and functional characteristics of a building. BIMs represent the geometrical characteristics of the Building, but also properties like bills of quantities, definition of COTS components, status of material in the different stages of the project, project economic data, etc. The BIM methodology, which is well established in the Architecture Engineering and Construction (AEC) domain for conventional buildings, has been brought one step forward in its application for Astronomical/Scientific facilities. In these facilities steel/concrete structures have high dynamic and seismic requirements, M&E installations are complex and there is a large amount of special equipment and mechanisms involved as a fundamental part of the facility. The detail design definition is typically implemented by different design teams in specialized design software packages. In order to allow the coordinated work of different engineering teams, the overall model, and its associated engineering database, is progressively integrated using a coordination and roaming software which can be used before starting construction phase for checking interferences, planning the construction sequence, studying maintenance operation, reporting to the project office, etc. This integrated design & construction approach will allow to efficiently plan construction sequence (4D). This is a powerful tool to study and analyze in detail alternative construction sequences and ideally coordinate the work of different construction teams. In addition engineering, construction and operational database can be linked to the virtual model (6D), what gives to the end users a invaluable tool for the lifecycle management, as all the facility information can be easily accessed, added or replaced. This paper presents the BIM methodology as implemented by IDOM with the E-ELT and ATST Enclosures as application examples.

Ariño, Javier; Murga, Gaizka; Campo, Ramón; Eletxigerra, Iñigo; Ampuero, Pedro

2012-09-01

167

Application of Field System-FS9 and a PC to Antenna Control Unit interface in Radio Astronomy in Peru  

Microsoft Academic Search

We are in the process to transform a 32m antenna in Peru, used for telecommunications, into a Radio Telescope to perform Radio Astronomy in Peru. The 32m antenna of Peru constructed by NEC was used for telecommunications with communications satellites at 6 GHz for transmission, and 4 GHz for reception. In collaboration of National Institute of Information and Communications Technology

Erick Vidal; José Ishitsuka; Yasuhiro Koyama

2006-01-01

168

Scalable desktop visualisation of very large radio astronomy data cubes  

NASA Astrophysics Data System (ADS)

Observation data from radio telescopes is typically stored in three (or higher) dimensional data cubes, the resolution, coverage and size of which continues to grow as ever larger radio telescopes come online. The Square Kilometre Array, tabled to be the largest radio telescope in the world, will generate multi-terabyte data cubes - several orders of magnitude larger than the current norm. Despite this imminent data deluge, scalable approaches to file access in Astronomical visualisation software are rare: most current software packages cannot read astronomical data cubes that do not fit into computer system memory, or else provide access only at a serious performance cost. In addition, there is little support for interactive exploration of 3D data. We describe a scalable, hierarchical approach to 3D visualisation of very large spectral data cubes to enable rapid visualisation of large data files on standard desktop hardware. Our hierarchical approach, embodied in the AstroVis prototype, aims to provide a means of viewing large datasets that do not fit into system memory. The focus is on rapid initial response: our system initially rapidly presents a reduced, coarse-grained 3D view of the data cube selected, which is gradually refined. The user may select sub-regions of the cube to be explored in more detail, or extracted for use in applications that do not support large files. We thus shift the focus from data analysis informed by narrow slices of detailed information, to analysis informed by overview information, with details on demand. Our hierarchical solution to the rendering of large data cubes reduces the overall time to complete file reading, provides user feedback during file processing and is memory efficient. This solution does not require high performance computing hardware and can be implemented on any platform supporting the OpenGL rendering library.

Perkins, Simon; Questiaux, Jacques; Finniss, Stephen; Tyler, Robin; Blyth, Sarah; Kuttel, Michelle M.

2014-07-01

169

Radio frequency overview of the high explosive radio telemetry project  

SciTech Connect

High explosive radio telemetry (HERT) is a project that is being developed jointly by Los Alamos National Laboratory and AlliedSignal Federal Manufacturing and Technologies. The ultimate goal is to develop a small, modular telemetry system capable of high-speed detection of explosive events, with an accuracy on the order of 10 nanoseconds. The reliable telemetry of this data, from a high-speed missile trajectory, is a very challenging opportunity. All captured data must be transmitted in less than 20 microseconds of time duration. This requires a high bits/Hertz microwave telemetry modulation code to insure transmission of the data with the limited time interval available.

Bracht, R. [Los Alamos National Lab., NM (United States); Dimsdle, J.; Rich, D.; Smith, F. [AlliedSignal Federal Manufacturing and Technologies, Kansas City, MO (United States)

1998-12-31

170

Array signal processing for radio astronomy Alle-Jan van der Veen1, Amir Leshem2 and Albert-Jan Boonstra3  

E-print Network

large scale radio telescopes. Keywords: Array signal processing, radio astronomy, interference). The first example of a flexible massive phased array radio telescope is LOFAR (13,000 elements) which), and applied for example in the five kilometer Cambridge radio telescope, the 3 km Westerbork Synthesis Radio

van der Veen, Alle-Jan

171

New Antennas and Methods for the Low Frequency Stellar and Planetary Radio Astronomy  

NASA Astrophysics Data System (ADS)

According to the special Program of the National Academy of Sciences of Ukraine, creation of the new giant Ukrainian radio telescope (GURT) was started a few years ago on the UTR-2 radio telescope observatory. The main goal is to reach maximum band at the lowest frequencies (10-70 MHz), effective area (step-by-step up to 100,000 sq.m), and high interference immunity for resolving many astrophysical tasks when the sensitivity is less limited by the confusion effects. These tasks include stellar radio astronomy (the Sun, solar wind, flare stars, pulsars, transients) and planetary one (Jupiter, planetary lightnings, Earth ionosphere, the Moon, exoplanets). This array should be complementary to the LOFAR, E-LOFAR systems. The first stages of the GURT (6 x 25 cross dipole active elements) and broad-band digital registration of the impulsive and sporadic events were tested in comparison with the existing largest decameter array UTR-2.

Konovalenko, A. A.; Falkovich, I. S.; Rucker, H. O.; Lecacheux, A.; Zarka, Ph.; Koliadin, V. L.; Zakharenko, V. V.; Stanislavsky, A. A.; Melnik, V. N.; Litvinenko, G. V.; Gridin, A. A.; Bubnov, I. N.; Kalinichenko, N. N.; Reznik, A. P.; Sidorchuk, M. A.; Stepkin, S. V.; Mukha, D. V.; Nikolajenko, V. S.; Karlsson, R.; Thide, B.

172

Fast pulsars, strange stars: An opportunity in radio astronomy  

SciTech Connect

The world's data on radio pulsars is not expected to represent the underlying pulsar population because of a search bias against detection of short periods, especially below 1 ms. Yet pulsars in increasing numbers with periods right down to this limit have been discovered suggesting that there may be even shorter ones. If pulsars with periods below 1/2 ms were found, the conclusion that the confined hadronic phase of nucleons and nuclei is only metastable would be almost inescapable. The plausible ground state in that event is the deconfined phase of (3-flavor) strange-quark-matter. From the QCD energy scale this is as likely a ground state as the confined phase. We show that strange matter as the ground state is not ruled out by any known fact, and most especially not by the fact that the universe is in the confined phase. 136 refs.

Glendenning, N.K.

1990-07-15

173

Bayesian detection of radar interference in radio astronomy  

NASA Astrophysics Data System (ADS)

L-Band observations at the Green Bank Telescope (GBT) and other radio observatories are often made in frequency bands allocated to aviation pulsed radar transmissions. It is possible to mitigate radar contamination of the astronomical signal by time blanking data containing these pulses. However, even when strong direct path pulses and nearby fixed clutter echoes are removed there are still undetected weaker aircraft echoes present which can corrupt the data. In a previous paper we presented an algorithm to improve real-time echo blanking by forming a Kalman filter tracker to follow the path of a sequence of echoes observed on successive radar antenna sweeps. The tracker builds a history which can be used to predict the location of upcoming echoes. We now present details of a new Bayesian detection algorithm which uses this prediction information to enable more sensitive weak pulse acquisition. The developed track information is used to form a spatial prior probability distribution for the presence of the next echoes. Regions with higher probability are processed with a lower detection threshold to pull out low level pulses without increasing the overall probability of false alarm detection. The ultimate result is more complete removal, by blanking the detected pulse, of radar corruption in astronomical observations.

Jeffs, Brian D.; Lazarte, Weizhen; Fisher, J. Richard

2006-06-01

174

PARAS program: Phased array radio astronomy from space  

NASA Technical Reports Server (NTRS)

An orbiting radio telescope is proposed which, when operated in a Very Long Baseline Interferometry (VLBLI) scheme, would allow higher (than currently available) angular resolution and dynamic range in the maps, and the ability of observing rapidly changing astronomical sources. Using a passive phases array technology, the proposed design consists of 656 hexagonal modules forming a 150 meter diameter dish. Each observatory module is largely autonomous, having its own photovoltaic power supply and low-noise receiver and processor for phase shifting. The signals received by the modules are channeled via fiber optics to the central control computer in the central bus module. After processing and multiplexing, the data is transmitted to telemetry stations on the ground. The truss frame supporting each observatory pane is a hybrid structure consisting of a bottom graphite/epoxy tubular triangle and rigidized inflatable Kevlar tubes connecting the top observatory panel and bottom triangle. Attitude control and stationkeeping functions are performed by a system of momentum wheels in the bus and four propulsion modules located at the compass points on the periphery of the observatory dish. Each propulsion module has four monopropellant thrusters and six hydrazine arcjets, the latter supported by a nuclear reactor. The total mass of the spacecraft is 22,060 kg.

Jakubowski, Antoni K.; Haynes, David A.; Nuss, Ken; Hoffmann, Chris; Madden, Michael; Dungan, Michael

1992-01-01

175

Accelerating radio astronomy cross-correlation with graphics processing units  

NASA Astrophysics Data System (ADS)

We present a highly parallel implementation of the cross-correlation of time-series data using graphics processing units (GPUs), which is scalable to hundreds of independent inputs and suitable for the processing of signals from 'large-Formula' arrays of many radio antennas. The computational part of the algorithm, the X-engine, is implemented efficiently on NVIDIA's Fermi architecture, sustaining up to 79% of the peak single-precision floating-point throughput. We compare performance obtained for hardware- and software-managed caches, observing significantly better performance for the latter. The high performance reported involves use of a multi-level data tiling strategy in memory and use of a pipelined algorithm with simultaneous computation and transfer of data from host to device memory. The speed of code development, flexibility, and low cost of the GPU implementations compared with application-specific integrated circuit (ASIC) and field programmable gate array (FPGA) implementations have the potential to greatly shorten the cycle of correlator development and deployment, for cases where some power-consumption penalty can be tolerated.

Clark, M. A.; LaPlante, P. C.; Greenhill, L. J.

2013-05-01

176

Final Project Report Modulate of Internet Radio Into FM Using GNU Radio  

E-print Network

Final Project Report Modulate of Internet Radio Into FM Using GNU Radio Department of Electrical-Introduction: Internet radio (also known as Webcasting) is becoming more and more popular. Especially that it covers for people traveling all the time or living away from there home country, internet radio helps them keep

Yu, Chansu

177

Radio astronomy with the European Lunar Lander: Opening up the last unexplored frequency regime  

NASA Astrophysics Data System (ADS)

The Moon is a unique location in our solar system and provides important information regarding the exposure to free space that is essential for future human space exploration to mars and beyond. The active broadband (100 kHz-100 MHz) tripole antenna now envisaged to be placed on the European Lunar Lander located at the Lunar South Pole allows for sensitive measurements of the exosphere and ionosphere, and their interaction with the Earths magnetosphere, solar particles, wind and CMEs and studies of radio communication on the Moon, that are essential for future lunar human and science exploration. In addition, the Lunar South Pole provides an excellent opportunity for radio astronomy. Placing a single radio antenna in an eternally dark crater or behind a mountain at the South (or North) pole would potentially provide perfect shielding from man-made radio interference (RFI), absence of ionospheric distortions, and high temperature and antenna gain stability that allows detection of the 21 cm wave emission from pristine hydrogen formed after the Big Bang and into the period where the first stars formed. A detection of the 21 cm line from the Moon at these frequencies would allow for the first time a clue on the distribution and evolution on mass in the early universe between the Epoch of Recombination and Epoch of Reionization (EoR). Next to providing a cosmological breakthrough, a single lunar radio antenna would allow for studies of the effect of solar flares and coronal mass ejections (CMEs) on the solar wind at distances close to Earth (space weather) and would open up the study of low frequency radio events (flares and pulses) from planets such as Jupiter and Saturn, which are known to emit bright (kJy-MJy) radio emission below 30 MHz (Jester and Falcke, 2009). Finally, a single radio antenna on the lunar lander would pave the way for a future large lunar radio interferometer; not only will it demonstrate the possibilities for lunar radio science and open up the last unexplored radio regime, but it will also allow a determination of the limitations of lunar radio science by measuring the local radio background noise.

Klein Wolt, Marc; Aminaei, Amin; Zarka, Philippe; Schrader, Jan-Rutger; Boonstra, Albert-Jan; Falcke, Heino

2012-12-01

178

Astronomy.  

ERIC Educational Resources Information Center

Selected materials needed to teach an astronomy unit as well as suggested procedures, activities, ideas, and astronomy fact sheets published by the Manitoba Planetarium are provided. Subjects of the fact sheets include: publications and classroom picture sets available from the National Aeronautics and Space Administration and facts and statistics…

Greenstone, Sid; Smith, Murray

179

The five-hundred-meter aperture spherical radio telescope (FAST) project  

NASA Astrophysics Data System (ADS)

Five-hundred-meter Aperture Spherical radio Telescope (FAST) is a Chinese "mega-science" project to build the largest single dish radio telescope in the world. Its engineering concept and design pave a new road to realize a huge single dish in an effective way. Being the most sensitive single dish radio telescope, FAST will enable astronomers to jump-start many science goals, such as surveying the neutral hydrogen in the Milky Way and other galaxies, detecting faint pulsars, hearing the possible signals from other civilizations, etc. The feasibility studies for FAST have been carried out for 14 years, supported by Chinese and international astronomy communities. The National Development and Reform Commission approved the funding proposal of FAST in 2007 with a capital budget close to 700 million RMB. The project time is 5.5 years from the commencement of work in March of 2011 and the first light is expected in 2016.

Nan, Rendong; Li, Di

2013-04-01

180

Kothmale Community Radio Interorg Project: True Community Radio or Feel-Good Propaganda?  

ERIC Educational Resources Information Center

The Kothmale Community Radio and Interorg project in Sri Lanka has been hailed as an example of how a community radio initiative should function in a developing nation. However, there is some question about whether the Kothmale Community Interorg Project is a true community radio initiative that empowers local communities to access ICT services…

Harvey-Carter, Liz

2009-01-01

181

BYU Radio Astronomy System for Imaging Galactic H1 and OH MASERs  

NASA Astrophysics Data System (ADS)

We have built a radio astronomy system initially designed to image galactic H1 (Hydrogen Spin-Flip) [at 1.42 GHz] and OH MASERS [ 1.66 GHz ] in star forming regions. Initial system architecture includes one 4-meter dish antenna, 0.38dB noise figure LNA and conventional super-heterodyne block down-conversion. Enhancements underway include baseline extensions for these wavelengths, CASPER based digital correlation / spectrometer design activity including Linux server, additional imaging wavelengths, rubidium clocks, and lock-in amplifiers.

Blakley, Daniel; Migenes, Victor

2011-10-01

182

Tectonic motion site survey of the National Radio Astronomy Observatory, Green Bank, West Virginia  

NASA Technical Reports Server (NTRS)

A geological and geophysical site survey was made of the area around the National Radio Astronomy Observatory (NRAO) to determine whether there are at present local tectonic movements that could introduce significant errors to Very Long Baseline Interferometry (VLBI) geodetic measurements. The site survey consisted of a literature search, photogeologic mapping with Landsat and Skylab photographs, a field reconnaissance, and installation of a seismometer at the NRAO. It is concluded that local tectonic movement will not contribute significantly to VLBI errors. It is recommended that similar site surveys be made of all locations used for VLBI or laser ranging.

Webster, W. J., Jr.; Allenby, R. J.; Hutton, L. K.; Lowman, P. D., Jr.; Tiedemann, H. A.

1979-01-01

183

Radio astronomy Explorer-B in-flight mission control system development effort  

NASA Technical Reports Server (NTRS)

A description is given of the development for the Mission Analysis Evaluation and Space Trajectory Operations (MAESTRO) program to be used for the in-flight decision making process during the translunar and lunar orbit adjustment phases of the flight of the Radio Astronomy Explorer-B. THe program serves two functions: performance and evaluation of preflight mission analysis, and in-flight support for the midcourse and lunar insertion command decisions that must be made by the flight director. The topics discussed include: analysis of program and midcourse guidance capabilities; methods for on-line control; printed displays of the MAESTRO program; and in-flight operational logistics and testing.

Lutsky, D. A.; Bjorkman, W. S.; Uphoff, C.

1973-01-01

184

Light Pollution in Lowndes County, Georgia: An Observational Project for Introductory Astronomy Students  

Microsoft Academic Search

A long-term study of light pollution in Lowndes County, Georgia has been initiated as a collaborative project among students enrolled in introductory astronomy courses at Valdosta State University. A single honors student began the project in Spring 2000; during the Fall 2000 semester all students enrolled in ASTR 1020K (Stellar and Galactic Astronomy) were invited to participate on a voluntary

K. S. Rumstay

2000-01-01

185

The impact of JPEG2000 lossy compression on the scientific quality of radio astronomy imagery  

NASA Astrophysics Data System (ADS)

The sheer volume of data anticipated to be captured by future radio telescopes, such as, the Square Kilometer Array (SKA) and its precursors present new data challenges, including the cost and technical feasibility of data transport and storage. Image and data compression are going to be important techniques to reduce the data size. We provide a quantitative analysis of the effects of JPEG2000's lossy wavelet image compression algorithm on the quality of the radio astronomy imagery data. This analysis is completed by evaluating the completeness, soundness and source parameterisation of the Duchamp source finder using compressed data. Here we found the JPEG2000 image compression has the potential to denoise image cubes, however this effect is only significant at high compression rates where the accuracy of source parameterisation is decreased.

Peters, S. M.; Kitaeff, V. V.

2014-10-01

186

Population density effect on radio frequencies interference (RFI) in radio astronomy  

NASA Astrophysics Data System (ADS)

Radio astronomical observation is infected by wide range of Radio Frequency Interference (RFI). We will also use information gathered from on-site RFI level measurements on selected 'good' areas generated by this study. After investigating a few suitable sites we will commence to the site and construct the RFI observation. Eventually, the best area we will be deciding from the observations soon. The result of this experiment will support our planning to build the first radio telescope in Malaysia. Radio observatories normally are located in remote area, in order to combat RFI from active spectrum users and radio noise produced in industrial or residential areas. The other solution for this problem is regulating the use of radio frequencies in the country (spectrum management). Measurement of RFI level on potential radio astronomical site can be done to measure the RFI levels at sites. Seven sites are chosen divide by three group, which is A, B and C. In this paper, we report the initial testing RFI survey for overall spectrum (0-2GHz) for those sites. The averaged RFI level above noise level at the three group sites are 19.0 (+/-1.79) dBm, 19.5 (+/-3.71) dBm and 17.0 (+/-3.71) dBm and the averaged RFI level above noise level for without main peaks are 20.1 (+/-1.77) dBm, 19.6 (+/-3.65) dBm and 17.2 (+/-1.43) dBm respectively.

Umar, Roslan; Abidin, Zamri Zainal; Ibrahim, Zainol Abidin; Hassan, Mohd Saiful Rizal; Rosli, Zulfazli; Hamidi, Zety Shahrizat

2012-06-01

187

Popularization of Astronomy under Cooperation between Students and Educators in Japan: the TENPLA project (2)  

NASA Astrophysics Data System (ADS)

The Tenpla project is a Japanese unique activity in popularization of astronomy under cooperation between students of astronomy, young astronomers, and social education facilities such as science museums (see also poster by M. Hiramatsu). In this paper, we report our individual activities for public in detail. Our aim is to provide bridges between astronomy and public, especially people who are unfamiliar with astronomy, directly by students and young astronomers at many scene of life such as in schools, cafés, or hospitals. Examples of our activities are as follows (1) Learning astronomy with local people, by local people, for local people. (2) Science cafés about astronomy at book stores, small restaurants and local airport. (3) Traveling lecture of astronomy for hospitalized children.

Kamegai, K.; Hiramatsu, M.; Takanashi, N.; Tsukada, K.

2006-08-01

188

Astronomie  

NASA Astrophysics Data System (ADS)

Astronomie gibt eine ausgezeichnete, reich illustrierte Darstellung aller klassischen und modernen Teilgebiete dieser Wissenschaft. Dabei wird ebenso großer Wert auf die faszinierenden Beobachtungsergebnisse und die zugrundeliegenden physikalischen Vorgänge gelegt. Das Buch eignet sich damit gleichermaßen als Begleiter zur Astronomie-Vorlesung wie als Fundgrube und Nachschlagewerk für jede(n) Astronomiebegeisterte(n). "... ein so modernes Buch, wie es kaum ein einzelner Autor vorlegen könnte." #Sterne und Weltraum (2/89)(zur englischen Ausgabe)#1

Karttunen, Hannu; Kröger, Pekka; Oja, Heikki; Poutanen, Markku; Donner, Karl J.; Marx, Siegfried A.; Lehmann, Holger H.

189

100 Hours of Astronomy Cornerstone Project of IYA2009  

NASA Astrophysics Data System (ADS)

The 100 Hours of Astronomy cornerstone project (100HA) is a round-the-clock, worldwide event with 100 continuous hours of a wide range of public outreach activities taking place from 2--5 April. A high-profile opening event will include presentation of Galileo's original telescope. Webcasts of international science center discussions and 24 hours of webcasts from professional research observatories will follow. A 24-hour global star party will occur on the last day. The Moon's phase will range from first quarter to gibbous, good phases for early evening observing, and Saturn will also be well placed for early evening observing events. Amateur astronomers will be encouraged to present educational events in schools as well as non-traditional venues. Online resources will include advertising, educational and how-to materials.

Simmons, M.

2008-11-01

190

The PACA Project : Pro-Am Collaborative Astronomy  

NASA Astrophysics Data System (ADS)

The Pro-Am Collaborative Astronomy (PACA) project is the next stage of evolution of the paradigm developed for the observational campaign of C/2012 S1 or C/ISON. Four different phases of collaboration are identified, and illustrate the integration of scientific investigations with amateur astronomer community via observations, and models; and the rapid dissemination of the results via a multitude of social media for rapid global access. The success of the paradigm shift in scientific research is now implemented in other comet observing campaigns. Both communities (scientific and amateur astronomers) benefit from these collective, collaborative partnerships; while outreach is the instantaneous deliverable that provides both a framework for future data analyses and the dissemination of the results. While PACA identifies a collaborative approach to pro-am collaborations, given the volume of data generated for each campaign, new ways of rapid data analysis, mining access and storage are needed.

Yanamandra-Fisher, P. A.

2014-04-01

191

Collaboration and Development of Radio Astronomy in Australasia and South-Pacific Region: New Zealand Perspectives  

NASA Astrophysics Data System (ADS)

Radio telescopes in the Asia-Pacific region form a natural network for VLBI observations, similar to the very successful networks in North America (Network Users Group) and Europe (European VLBI Network). New Zealand's VLBI facility, which we are developing since 2005, has the potential to strengthen the Asian-Pacific VLBI network and its role in astronomy, geodesy and geoscience. It will positively influence regional and international activities in geoscience and geodesy that advance New Zealand's national interests. A self-contained radio astronomy system for VLBI, including a 1.658 GHz (centre frequency), 16 MHz bandwidth RF system (feed and downconversion system locked to a Rubidium maser and GPS clock), an 8-bit sampler/digitisation system, and a disk-based recording system built around a commodity PC was developed in New Zealand Centre for Radiophysics and Space Research. This was designed as a portable system for use on various radio telescopes. A number of Trans-Tasman tests has been conducted in 2005-2006 between the CRSR system installed on a 6 metre dish located in Auckland and the Australia Telescope Compact Array in Narrabri, Australia. This work has been successful, with fringes located from the recorded data and high resolution image of the quasar PKS1921-231 obtained. Experiments were recently conducted with Japan; new tests are planned with Korea and Fiji. Plans have been made to build a new 16.5 m antenna in New Zealand's North Island and to upgrade an 11 m dish in the South Island. A possible future of New Zealand's participation in the SKA is being discussed.

Gulyaev, S.; Natusch, T.

2006-08-01

192

Matched wideband low-noise amplifiers for radio astronomy S. Weinreb, J. Bardin, H. Mani, and G. Jones  

E-print Network

Matched wideband low-noise amplifiers for radio astronomy S. Weinreb, J. Bardin, H. Mani, and G low noise amplifiers for the 0.3­4 GHz frequency range are described. The amplifiers can be operated temperature. One amplifier utilizes commercially available, plastic-packaged SiGe transistors for first

Weinreb, Sander

193

The Radio Properties of the dMe Flare Star Proxima Centauri Institute of Astronomy & Astrophysics, Academia Sinica,  

E-print Network

The Radio Properties of the dMe Flare Star Proxima Centauri Jeremy Lim Institute of Astronomy--polarized and apparently narrowband flare at 20 cm, similar to those seen on other dMe flare stars. This flare was detected wavelength observations of other dMe flare stars. We show that the high mass--loss rate inferred by Mullan et

White, Stephen

194

Unformatted Digital Fiber-Optic Data Transmission for Radio Astronomy Front-Ends  

NASA Astrophysics Data System (ADS)

We report on the development of a prototype integrated receiver front-end that combines all conversions from RF to baseband, from analog to digital, and from copper to fiber into one compact assembly, with the necessary gain and stability suitable for radio astronomy applications. The emphasis in this article is on a novel digital data link over optical fiber which requires no formatting in the front-end, greatly reducing the complexity, bulk, and power consumption of digital electronics inside the antenna, facilitating its integration with the analog components, and minimizing the self-generated radio-frequency interference (RFI) which could leak into the signal path. Management of the serial data link is performed entirely in the back-end based on the statistical properties of signals with a strong random noise component. In this way, the full benefits of precision and stability afforded by conventional digital data transmission are realized with far less overhead at the focal plane of a radio telescope.

Morgan, Matthew A.; Fisher, J. Richard; Castro, Jason J.

2013-06-01

195

ASTRONOMY.  

ERIC Educational Resources Information Center

THIS TEACHER'S GUIDE FOR A UNIT ON ASTRONOMY ESTABLISHES (1) UNDERSTANDINGS AND ATTITUDES, (2) SKILLS, AND (3) CONCEPTS TO BE GAINED IN THE STUDY. THE OVERVIEW EXPLAINS THE ORGANIZATION AND OBJECTIVES OF THE UNIT. TOPICAL DIVISIONS ARE (1) THE EARTH, (2) THE MOON, (3) THE SUN, (4) THE SOLAR SYSTEM, (5) THE STARS, (6) THE UNIVERSE, AND (7) SPACE…

Louisiana Arts and Science Center, Baton Rouge.

196

The Development of Radio Astronomy at the Sternberg Astronomical Institute of Lomonosov Moscow State University and the Space Research Institute of the USSR Academy of Sciences  

NASA Astrophysics Data System (ADS)

This chapter provides information about the emergence and development of radio astronomy at the Sternberg Astronmical Institute of Moscow State University (GAISH), and further at the Space Research Institute (IKI). The main results of theoretical studies of mechanisms for the Sun, Galactic and extragalactic radio emission and their relationship to physical processes in space are laid out in detail. The results of observations carried out at the initiative of and with the participation of radio astronomers from GAISH and IKI using many radio telescope in the Soviet Union and abroad are also considered, including methods for space radio astronomy.

Gindilis, L. M.

197

Astronomy and astrophysics for the 1980's. Volume 2: Reports of the panels. Astronomy Survey Committee.  

NASA Astrophysics Data System (ADS)

Contents: High-energy astrophysics: introduction, the nature of high-energy astronomy and the scope of the report, summary of principal recommendations, X-ray astronomy, extreme-ultraviolet astronomy, gamma-ray astronomy, cosmic-ray astronomy, high-energy solar astronomy, neutrino astronomy, gravitational-wave astronomy. Ultraviolet, optical, and infrared astronomy: summary and recommendations, highlights of astronomy in the 1970's, science opportunities for the 1980's, detailed description of the UVOIR program for the 1980's, projections into the future, epilogue. Radio astronomy: introduction: scope of the report, summary of recommendations, description of recommended projects and facilities, scientific priorities, reference to list of radio and radar astronomy observatories. Theoretical and laboratory astrophysics: introduction and summary of recommendations, theoretical astrophysics, laboratory astrophysics. Data processing and computational facilities: introduction, conclusions and recommendations, the trend toward decentralization, theoretical computing, image processing and analysis, data archiving, astronomical data bases, telecommunications, specialized architectures. Organization, education, and personnel: summary of recommendations, maintenance of scientific talent, other issues in the practice ofastronomy, astronomy and the astronomers in the 1970's.1982

198

Reintroducing Amateur Radio In ECE Capstone Design Projects  

Microsoft Academic Search

Presented here from experience are the salient steps for the reintroduction of Amateur Radio into the capstone design project in Electrical and Computer Engineering and diverse examples of such projects. These steps include the involvement of the faculty supervisor, the establishment of an Amateur Radio station as a communications laboratory sponsored by the department, a survey of the technical resources

Dennis Silage

2004-01-01

199

Probing Strongly-Scattered Compact Objects Using Ultra-High-Resolution Techniques in Radio Astronomy  

NASA Astrophysics Data System (ADS)

This dissertation explores fundamental limits in radio astronomy and develops techniques that utilize the scintillation of compact objects to probe detailed properties of their emission regions and of the scattering material. I develop a statistical framework for observations with spectral resolution at or near the Nyquist limit, suitable for describing the observed statistics of strongly-scattered sources. I demonstrate that these statistics can effectively isolate the signature of an extended emission region, requiring no assumptions about the nature or distribution of the scattering material. Then, using observations of the Vela pulsar at 760 MHz with the Green Bank Telescope, I thereby achieve a spatial resolution of 4 km at the pulsar. Finally, I explore the signature of refractive scintillation on the interferometric visibility measured on long baselines, and I derive optimal correlation estimators for quantized data.

Johnson, Michael Douglas

200

Engaging students in astronomy and spectroscopy through Project SPECTRA!  

NASA Astrophysics Data System (ADS)

Computer simulations for minds-on learning with "Project Spectra!" How do we gain information about the Sun? How do we know Mars has CO2 or that Enceladus has H2O geysers? How do we use light in astronomy? These concepts are something students and educators struggle with because they are abstract. Using simulations and computer interactives (games) where students experience and manipulate the information makes concepts accessible. Visualizing lessons with multi-media solidifies understanding and retention of knowledge and is completely unlike its paper-and-pencil counterpart. Visualizations also enable teachers to forgo purchasing expensive laboratory equipment. "Project Spectra!" is a science and engineering program that uses computer-based Flash interactives to expose students to astronomical spectroscopy and actual data in a way that is not possible with traditional in-class activities. To engage students in "Project Spectra!", students are given a mission, which connects them with the research at hand. Missions range from exploring remote planetary atmospheres and surfaces, experimenting with the Sun using different filters, or analyzing the soil of a remote planet. Additionally, students have an opportunity to learn about NASA missions, view movies, and see images connected with their mission, which is something that is not practical to do during a typical paper-and-pencil activity. Since students can choose what to watch and explore, the interactives accommodate a broad range of learning styles. Students can go back and forth through the interactives if they've missed a concept or wish to view something again. In the end, students are asked critical thinking questions and conduct web-based research. These interactives complement in-class Project SPECTRA! activities exploring applications of the electromagnetic spectrum.

Wood, E. L.

2011-12-01

201

Making an International Impact: A Joint International Astronomy Project  

ERIC Educational Resources Information Center

Early in 2010, a group of year 11 students (age 15-16) studying GCSE (General Certificate of Secondary Education) Astronomy at The Radclyffe School, Oldham, in the UK, teamed up with a similar age group from Tianyi High School, Wuxi City, in China, to undertake a joint astronomy investigation. This article outlines the outcome of the first stage…

Scott, Robert; Shen, Xinrong; Mulley, Ian

2012-01-01

202

Seeing the Sky: 100 Projects, Activities, and Explorations in Astronomy.  

ERIC Educational Resources Information Center

Fourteen astronomy activities are presented including classroom procedures and questions. Topics include different investigations of the moon, planets, stars, sunsets, light pollution, and rainbows and halos. Additional information on measurements used for observations in astronomy, and rainbow characteristics is included. (CW)

Schaaf, Fred

1990-01-01

203

Effective correlator for RadioAstron project  

NASA Astrophysics Data System (ADS)

This paper presents the implementation of programme FX-correlator for Very Long Baseline Interferometry, adapted for the project "RadioAstron". Software correlator implemented for heterogeneous computing systems using graphics accelerators. It is shown that for the task interferometry implementation of the graphics hardware has a high efficiency. The host processor of heterogeneous computing system, performs the function of forming the data flow for graphics accelerators, the number of which corresponds to the number of frequency channels. So, for the Radioastron project, such channels is seven. Each accelerator is perform correlation matrix for all bases for a single frequency channel. Initial data is converted to the floating-point format, is correction for the corresponding delay function and computes the entire correlation matrix simultaneously. Calculation of the correlation matrix is performed using the sliding Fourier transform. Thus, thanks to the compliance of a solved problem for architecture graphics accelerators, managed to get a performance for one processor platform Kepler, which corresponds to the performance of this task, the computing cluster platforms Intel on four nodes. This task successfully scaled not only on a large number of graphics accelerators, but also on a large number of nodes with multiple accelerators.

Sergeev, Sergey

204

Panoramic Radio Astronomy: Wide-field 1-2 GHz research on galaxy evolution  

NASA Astrophysics Data System (ADS)

In a burst of renewed vigor enabled by recent technological advancements, radio astronomers around the world are now developing a number of new telescopes and instruments. Within the coming few years, a major improvement will be achieved over current facilities. Interferometers such as ASKAP, MeerKAT and WSRT+APERTIF will provide a combination of larger field of view and increased simultaneous bandwidth, while maintaining good collecting area and angular resolution. They will achieve a survey speed 10-50 times larger at 1-2 GHz than what is currently possible, allowing for the first time optical-like all-sky extragalactic surveys at these frequencies. The way that radio astronomical research is carried out will change profoundly, marking a major step towards the capabilities sought after for the coming decades. Significant progress will be made in many fields of radio astronomy. One of the areas that will benefit most is research into the evolution of galaxies over the past few Gyr. In particular, wide-field observations at 1-2 GHz will provide an unprecedented panoramic view of the gas properties and star formation in galaxies, embedded in their environment, from z~0.2-0.5 to the present. We aim to bring together researchers in this field to discuss the optimal exploitation of the new radio observatories for future science programs. Within the framework of our current knowledge of the galaxy population at z<0.5, we will address: the key science questions that the new telescopes will permit us to answer in combination with complimentary work at other wavelengths; the observing/analysis modes/strategies which will allow us to most efficiently exploit the data; and the techniques for most effectively coping with the huge volume of survey products, so far unusual for the radio community. In keeping with the forward-looking spirit of this conference, we encourage potential speakers to present and discuss their plans for the instruments of the near future. The key points that the conference will address are: * Scope, depth and design of HI wide area surveys * Evolution of the HI mass function and its dependence on morphological type and environment * Evolution of galaxy scaling relations out to z~0.2 * The evolution of star formation and its relation to gas content in galaxies * Wide field-of-view deep HI observations of individual fields - nearby clusters, groups and galaxies * Continuum surveys: star-forming-galaxies and the role of AGN activity * Polarisation and magnetic fields in nearby galaxies

205

Astronomy  

NSDL National Science Digital Library

Let's explore the universe together. First we'll be learning about stars: what they are and how they are formed. Then we'll explore different websites to learn about other parts of our solar system Write 5 new things you learn about stars from EACH of these sites: How Stars Work A Star s Story Now explore the rest of the universe. Write 3 new things you learn from EACH of these sites: Astronomy Kidastronomy NASA Planetary Tour StarChild Finished and unsure what to do? Go back to each of these websites and check out the games about ...

Ms. Cazier

2009-10-09

206

Prototyping scalable digital signal processing systems for radio astronomy using dataflow models  

NASA Astrophysics Data System (ADS)

There is a growing trend toward using high-level tools for design and implementation of radio astronomy digital signal processing (DSP) systems. Such tools, for example, those from the Collaboration for Astronomy Signal Processing and Electronics Research (CASPER), are usually platform-specific, and lack high-level, platform-independent, portable, scalable application specifications. This limits the designer's ability to experiment with designs at a high-level of abstraction and early in the development cycle. We address some of these issues using a model-based design approach employing dataflow models. We demonstrate this approach by applying it to the design of a tunable digital downconverter (TDD) used for narrow-bandwidth spectroscopy. Our design is targeted toward an FPGA platform, called the Interconnect Break-out Board (IBOB), that is available from the CASPER. We use the term TDD to refer to a digital downconverter for which the decimation factor and center frequency can be reconfigured without the need for regenerating the hardware code. Such a design is currently not available in the CASPER DSP library. The work presented in this paper focuses on two aspects. First, we introduce and demonstrate a dataflow-based design approach using the dataflow interchange format (DIF) tool for high-level application specification, and we integrate this approach with the CASPER tool flow. Secondly, we explore the trade-off between the flexibility of TDD designs and the low hardware cost of fixed-configuration digital downconverter (FDD) designs that use the available CASPER DSP library. We further explore this trade-off in the context of a two-stage downconversion scheme employing a combination of TDD or FDD designs.

Sane, N.; Ford, J.; Harris, A. I.; Bhattacharyya, S. S.

2012-05-01

207

The beginnings of decameter radio astronomy: pioneering works of Semen Ya. Braude and his followers in Ukraine  

NASA Astrophysics Data System (ADS)

S.Ya. Braude (1911-2003) was the well-known radio astronomer, one of the founders of low-frequency astronomical research in the world, in particular in the former Soviet Union. He began to work in this field of science in 1957, in Kharkiv city (Ukraine), from the design and manufacturing small decameter interferometer ID-1 and ID-2. Since that time Braude and his team have developed more sophisticated radio decameter telescopes as UTR-1 and UTR-2 (the largest in the world till now) as well as the first decameter VLBI network URAN. They have obtained some important pioneering results about low-frequency radio emission of objects in our Solar system, Galaxy and Metagalaxy by means of these telescopes. In this paper the key events of early history of decameter radio astronomy research in the former USSR are mentioned with emphasizing the role of S. Braude. For the period of 1957-1962, the quotations of Braude's Personal Diary (2003) are first laying open to the public. The most important results obtained by S.Ya. Braude and his followers as well as perspectives of decameter radio astronomy in Ukraine and in the world are highlighted briefly.

Vavilova, I. B.; Konovalenko, A. A.; Megn, A. V.

2007-06-01

208

Adapting the RBSEU Nova Search Project for Use in Intro Astronomy at Truckee Meadows Community College: A Case Study  

NASA Astrophysics Data System (ADS)

This poster summary describes how the RBSEU Nova Search project was adapted for use in the introductory astronomy course at Truckee Meadows Community College. The summary discusses what the RBSEU Nova Search project is, motivations for including undergraduate research experiences in a non-majors astronomy course, and "lessons learned" in successfully implementing this project.

Loranz, D.

2011-09-01

209

The Evolution of the National Radio Astronomy Observatory into a User Based Observatory  

NASA Astrophysics Data System (ADS)

The NRAO was conceived in the mid 1950s as a state-of-the-art facility to allow the United States to compete in the exciting radio astronomy discoveries then taking place in the U.K., the Netherlands and Australia. Otto Struve, the first NRAO director in Green Bank, was chosen to lead the Observatory research program. During Struve's tenure as director, nearly all of the research was carried out by NRAO staff members resident at the Green Bank Observatory. However, under Dave Heeschen, who served as NRAO Director from 1961 to 1978, the number of visitor programs gradually increased; the NRAO scientific staff become more involved in visitor support than in doing their own research, and users became more dependent on instruments and techniques developed by NRAO, often not even coming to the Observatory for their observations. Currently, about half of the observing time on NRAO facilities is allocated to observers from foreign institutions -institutions with which NRAO was built to compete.

Kellerman, Kenneth I.; Bouton, E.

2006-12-01

210

ESO Signs Largest-Ever European Industrial Contract For Ground-Based Astronomy Project ALMA  

NASA Astrophysics Data System (ADS)

ESO, the European Organisation for Astronomical Research in the Southern Hemisphere, announced today that it has signed a contract with the consortium led by Alcatel Alenia Space and composed also of European Industrial Engineering (Italy) and MT Aerospace (Germany), to supply 25 antennas for the Atacama Large Millimeter Array (ALMA) project, along with an option for another seven antennas. The contract, worth 147 million euros, covers the design, manufacture, transport and on-site integration of the antennas. It is the largest contract ever signed in ground-based astronomy in Europe. The ALMA antennas present difficult technical challenges, since the antenna surface accuracy must be within 25 microns, the pointing accuracy within 0.6 arc seconds, and the antennas must be able to be moved between various stations on the ALMA site. This is especially remarkable since the antennas will be located outdoor in all weather conditions, without any protection. Moreover, the ALMA antennas can be pointed directly at the Sun. ALMA will have a collecting area of more than 5,600 square meters, allowing for unprecedented measurements of extremely faint objects. The signing ceremony took place on December 6, 2005 at ESO Headquarters in Garching, Germany. "This contract represents a major milestone. It allows us to move forward, together with our American and Japanese colleagues, in this very ambitious and unique project," said ESO's Director General, Dr. Catherine Cesarsky. "By building ALMA, we are giving European astronomers access to the world's leading submillimetre facility at the beginning of the next decade, thereby fulfilling Europe's desire to play a major role in this field of fundamental research." Pascale Sourisse, Chairman and CEO of Alcatel Alenia Space, said: "We would like to thank ESO for trusting us to take on this new challenge. We are bringing to the table not only our recognized expertise in antenna development, but also our long-standing experience in coordinating consortiums in charge of complex, high-performance ground systems." ALMA is an international astronomy facility. It is a partnership between Europe, North America and Japan, in cooperation with the Republic of Chile. The European contribution is funded by ESO and Spain, with the construction and operations being managed by ESO. A matching contribution is being made by the USA and Canada, who will also provide 25 antennas. Japan will provide additional antennas, thus making this a truly worldwide endeavour. ALMA will be located on the 5,000m high Llano de Chajnantor site in the Atacama Desert of Northern Chile. ALMA will consist of a giant array of 12-m antennas separated by baselines of up to 18 km and is expected to start partial operation by 2010-2011. The excellent site, the most sensitive receivers developed so far, and the large number of antennas will allow ALMA to have a sensitivity that is many times better than any other comparable instrument. "ALMA will bring to sub-millimetre astronomy the aperture synthesis techniques of radio astronomy, enabling precision imaging to be done on sub-arcsecond angular scales, and will nicely complement the ESO VLT/VLTI observatory", said Dr. Hans Rykaczewski, the ALMA European Project Manager. Millimetre-wave astronomy is the study of the universe in the spectral region between what is traditionally considered radio waves and infrared radiation. In this realm, ALMA will study the evolution of galaxies, including very early stages, gather crucial data on the formation of stars, proto-planetary discs, and planets, and provide new insights on the familiar objects of our own solar system. A prototype antenna had already been built by Alcatel Alenia Space and European Industrial Engineering and thoroughly tested along with prototypes antennas from Vertex/LSI and Mitsubishi at the ALMA Antenna Test Facility located at the Very Large Array site in Socorro, New Mexico. For more information on the ALMA project, please go to http://www.eso.org/projects/alma/.

2005-12-01

211

The Five-Hundred Aperture Spherical Radio Telescope (fast) Project  

Microsoft Academic Search

Five-hundred-meter Aperture Spherical radio Telescope (FAST) is a Chinese mega-science project to build the largest single dish radio telescope in the world. Its innovative engineering concept and design pave a new road to realize a huge single dish in the most effective way. FAST also represents Chinese contribution in the international efforts to build the square kilometer array (SKA). Being

Rendong Nan; Di Li; Chengjin Jin; Qiming Wang; Lichun Zhu; Wenbai Zhu; Haiyan Zhang; Youling Yue; Lei Qian

2011-01-01

212

Science Sampler: Goldstone Apple Valley Radio Telescope Project  

NSDL National Science Digital Library

The Goldstone Apple Valley Radio Telescope (GAVRT) project involved thousands of student scientists across the nation in the collection and analysis of astronomical data using a 34-meter radio telescope. These students contributed to the work of the world's foremost authorities on space science when they forwarded their information to NASA's Jet Propulsion Laboratory (JPL) scientists. The JPL scientists used the information to expand their studies of Jupiter, Uranus, and variable quasars.

Dave MacLaren

2003-05-01

213

Research Experience for Teachers at NRAO-Green Bank: Calibration of Data from the Green Bank Telescope and Classroom Activities in Radio Astronomy  

NASA Astrophysics Data System (ADS)

The NSF-funded "Research Experience for Teachers" project provides teachers an opportunity to work on a current scientific or engineering research project. This paper will present the results of research conducted with the Robert C. Byrd Green Bank Telescope (GBT) as well as classroom activities that will use GBT data. In order to determine the accuracy of the calibration of receivers on cm-wave radio telescopes, engineers must periodically determine the equivalent temperature of a receiver's calibration noise diode. The traditional methods utilize hot-cold loads and usually achieve an accuracy of no better than 5%, have a very coarse frequency resolution, and require days of labor. Using observations with the GBT of standard astronomical flux calibrators, we measured the noise diode temperatures for four receivers that cover 1 to 10 GHz. By comparing the detected power from the calibrators to that generated by the noise diodes we were able to determine the temperature of the noise diodes to an accuracy of 1% with very good frequency resolution (1 MHz). The astronomically determined values agree, with few exceptions, to the less accurate values generated by the receiver engineer. In contrast to the methods employed by engineers, the astronomical determinations took only a few hours. Using data collected from the GBT and the NRAO 140-foot telescope, high-school students at Breck School in Golden Valley, MN will use the Hands-On Universe (HOU) software to analyze fits files containing data from a 100 square-degree region of the Orion Nebula. Instead of always relying on optical images from personal observations or the HOU groups at Lawrence Hall of Science or Yerkes, students can now use radio images. Comparing radio images with those derived at optical wavelengths should prove enlightening for students, many of whom have misconceptions concerning radio astronomy.

Johnson, C. H.; Maddalena, R. J.

2002-12-01

214

Multiverso: Rock'n'Astronomy  

NASA Astrophysics Data System (ADS)

In the last few years, there have been several projects involving astronomy and classical music. But have a rock band ever appeared at a science conference or an astronomer at a rock concert? We present a project, Multiverso, in which we mix rock and astronomy, together with poetry and video art (Caballero, 2010). The project started in late 2009 and has already reached tens of thousands people in Spain through the release of an album, several concert-talks, television, radio, newspapers and the internet.

Caballero, J. A.

2012-05-01

215

The General Education Astronomy Source (GEAS) Project: Extending the Reach of Astronomy Education  

NASA Astrophysics Data System (ADS)

We present a set of NASA and NSF sponsored resources to aid in teaching astronomy remotely and in the classroom at the college level, with usage results for pilot groups of students. Our goal is to increase the accessibility of general education science coursework to underserved populations nationwide. Our materials are available for use without charge, and we are actively looking for pilot instructors. Primary components of our program include an interactive online tutorial program with over 12,000 questions, an instructor review interface, a set of hands-on and imaging- and spectra-driven laboratory exercises, including video tutorials, and interviews with diverse individuals working in STEM fields to help combat stereotypes. We discuss learning strategies often employed by students without substantial scientific training and suggest ways to incorporate them into a framework based on the scientific method and techniques for data analysis, and we compare cohorts of in-class and distance-education students.

Vogt, N. P.; Muise, A. S.

2014-07-01

216

COMPUTER USE AUTHORIZATION ASTRONOMY DEPARTMENT  

E-print Network

COMPUTER USE AUTHORIZATION ASTRONOMY DEPARTMENT RADIO ASTRONOMY LABORATORY THEORETICALASTROPHYSICS authorized to support charges for the computer account. Please give the completed form to Bill Boyd in 401: ____________________________ User I.D.: ________________________ CONDITIONS OF USE The Astronomy Department provides computing

Militzer, Burkhard

217

CONFERENCES AND SYMPOSIA: The Pushchino Radio Astronomy Observatory of the P N Lebedev Physical Institute Astro Space Center: yesterday, today, and tomorrow  

NASA Astrophysics Data System (ADS)

The development of Russian (formerly Soviet) radio astronomy is indissolubly linked with the P N Lebedev Physical Institute (LPI), Russian Academy of Sciences. From the late 1940s, the institute conducted most of its radio astronomy research in the Crimea, at stations or on field trips; in the late 1950s, the center of gravity of research moved to the southern Moscow region, where one of the largest radio astronomy observatories in the country and in the world was developed within less than twenty years. The observatory unique instrumentation system is briefly reviewed in a historical perspective. Key research areas and some major achievements are outlined, and the prospects of the observatory as (currently) part of the LPI Astro Space Center are examined.

Dagkesamanskii, Rustam D.

2009-11-01

218

Communicating Astronomy in a Metropolis and Disaster Area - Activities of the Tenpla Project  

NASA Astrophysics Data System (ADS)

We present recent activities delivering astronomy to the public by the Tenpla project in Japan. One is voluntary activities in the disaster area of the Great East Japan Earthquake. The other is holding tens of star parties and public lectures in the central area of Tokyo.

Kamegai, K.; Takanashi, N.; Hiramatsu, M.; Naito, S.

2015-03-01

219

Small Explorer project: Submillimeter Wave Astronomy Satellite (SWAS). Mission operations and data analysis plan  

NASA Technical Reports Server (NTRS)

The Mission Operations and Data Analysis Plan is presented for the Submillimeter Wave Astronomy Satellite (SWAS) Project. It defines organizational responsibilities, discusses target selection and navigation, specifies instrument command and data requirements, defines data reduction and analysis hardware and software requirements, and discusses mission operations center staffing requirements.

Melnick, Gary J.

1990-01-01

220

Learning Approaches, Course Experience, and Astronomy Understanding in The Oklahoma Project.  

ERIC Educational Resources Information Center

Details a project designed to bolster the quality of astronomy education through teacher workshops. Workshop topics include the solar system, stars, stellar evolution, galaxies, and cosmology. The Learning Approach Questionnaire (LAQ) is used to determine the effects of the workshops. (DDR)

Mann, Jennifer; Williams, Karen; Rutledge, Carl

1998-01-01

221

Applying of interactive methods for astronomy education in a school project "International space colony TANHGRA"  

NASA Astrophysics Data System (ADS)

Several interactive methods, applied in the astronomy education during creation of the project about a colony in the Space, are presented. The methods Pyramid, Brainstorm, Snow-slip (Snowball) and Aquarium give the opportunity for schooler to understand and learn well a large packet of astronomical knowledge.

Radeva, Veselka S.

222

Europe and US to Collaborate on the Design and Development of a Giant Radio Telescope Project in Chile  

NASA Astrophysics Data System (ADS)

High Goals for the Atacama Large Millimeter Array (ALMA) Representatives from the U.S. and Europe signed an agreement today in Washington to continue collaboration on the first phase of a giant new telescope project. The telescope will image the Universe with unprecedented sensitivity and sharpness at millimeter wavelengths (between the radio and infrared spectral regions). It will be a major step for astronomy, making it possible to study the origins of galaxies, stars and planets. This project is a prime example of a truly global project, an essential development in view of the ever-increasing complexity and cost of front-line astronomical facilities. The U.S. side of the project is run by the National Radio Astronomy Observatory (NRAO) , operated by Associated Universities, Inc. (AUI) under a cooperative agreement with the National Science Foundation (NSF). The European side of the project is a collaboration between the European Southern Observatory (ESO) , the Centre National de la Recherche Scientifique (CNRS) , the Max-Planck-Gesellschaft (MPG) , the Netherlands Foundation for Research in Astronomy (NFRA) and Nederlandse Onderzoekschool Voor Astronomie (NOVA) , and the United Kingdom Particle Physics and Astronomy Research Council (PPARC). The Europe-U.S. agreement signed today may be formally extended in the very near future to include Japan, following an already existing tripartite declaration of intent. Dr. Robert Eisenstein, NSF's Assistant Director Mathematical and Physical Sciences, called the project "a path-breaking international partnership that will open far-reaching opportunities for astronomical observations. This array would enable astronomers to explore the detailed processes through which the stars and planets form and give us a vastly improved understanding of the formation of the first galaxies in the very early universe." Eisenstein welcomed the collaboration with Europe and Japan's interest in becoming a major partner. Speaking on behalf of the European Signatories, Prof. Riccardo Giacconi, Director General of the European Southern Observatory (ESO) , one of the signatories to the new astronomy project, described the new project as "absolutely fantastic and farsighted - a major ground-based astronomical observatory for the 21st century. It will open up a key region of the electromagnetic spectrum to study the very early universe and the interstellar clouds where the stars and planets are born". The new telescope will be located in the Atacama desert of northern Chile, and has been given the name ALMA, for "Atacama Large Millimeter Array". This land has been given in concession to CONICYT (The Chilean National Commission for Science and Technology) last year by the "Ministerio de Bienes Nacionales" (Ministry of National Assets). It has also been declared a national reserve for science by President Frei because of its unique capabilities for astronomical research. ALMA will be a revolutionary telescope, operating at millimeter and submillimeter wavelengths and comprised of an array of individual antennas each 12 meters in diameter that work together to make precision images of astronomical objects. The goal of the ALMA Project is an array of 64 antennas that can be positioned as needed over an area 10 km in diameter so as to give the array a zoom-lens capability. Dr. Paul Vanden Bout, Director of the U.S. National Radio Astronomy Observatory , emphasized the technical capabilities needed for the array: "The ALMA Project involves development of a variety of fundamental technologies including amplification of faint cosmic signals using superconducting receivers and ultrafast digital data processing, technologies that will enhance many related areas of scientific research". This MOU commits the Signatories to collaborate in a three-year Design and Development Phase 1 for a joint project. In the U.S., an amount of US $26 million has been approved for this phase, and in Europe, DM 28 million (15 million EURO). Two prototype 12-meter antennas will be cons

1999-06-01

223

Managing Astronomy Research Data: Case Studies of Big and Small Research Projects  

NASA Astrophysics Data System (ADS)

Astronomy data management refers to all actions taken upon data over the course of the entire research process. It includes activities involving the collection, organization, analysis, release, storage, archiving, preservation, and curation of research data. Astronomers have cultivated data management tools, infrastructures, and local practices to ensure the use and future reuse of their data. However, new sky surveys will soon amass petabytes of data requiring new data management strategies.The goal of this dissertation, to be completed in 2015, is to identify and understand data management practices and the infrastructure and expertise required to support best practices. This will benefit the astronomy community in efforts toward an integrated scholarly communication framework.This dissertation employs qualitative, social science research methods (including interviews, observations, and document analysis) to conduct case studies of data management practices, covering the entire data lifecycle, amongst three populations: Sloan Digital Sky Survey (SDSS) collaboration team members; Individual and small-group users of SDSS data; and Large Synoptic Survey Telescope (LSST) collaboration team members. I have been observing the collection, release, and archiving of data by the SDSS collaboration, the data practices of individuals and small groups using SDSS data in journal articles, and the LSST collaboration's planning and building of infrastructure to produce data.Preliminary results demonstrate that current data management practices in astronomy are complex, situational, and heterogeneous. Astronomers often have different management repertoires for working on sky surveys and for their own data collections, varying their data practices as they move between projects. The multitude of practices complicates coordinated efforts to maintain data.While astronomy expertise proves critical to managing astronomy data in the short, medium, and long term, the larger astronomy data workforce encompasses a greater breadth of educational backgrounds. Results show that teams of individuals with distinct expertise are key to ensuring the long-term preservation and usability of astronomy datasets.

Sands, Ashley E.

2015-01-01

224

The Quiet Skies Project  

NSDL National Science Digital Library

To help promote student awareness of the connection between radio astronomy and radio frequency interference (RFI), an inquiry-based science curriculum was developed to allow high school students to determine RFI levels in their communities. The Quiet Skies Project--the result of a collaboration between the National Aeronautics and Space Administration (NASA), the National Science Foundation (NSF), and the National Radio Astronomy Observatory (NRAO)--encourages students to collect and analyze RFI data and develop conclusions as a team.

Steve Rapp

2008-10-01

225

The international project for radio meteor observation 2001 - 2003  

NASA Astrophysics Data System (ADS)

There are about 150 radio meteor observing stations in the world. At the moment, worldwide data are combined by using relative value to monitor whole meteor activity without radiant and weather problems. This project was planned for major meteor showers since 2001. We have succeeded in monitoring and investigating several major meteor showers. Furthermore, this project has provided FLASH and LIVE contents. This international project therefore was not only useful in monitoring but also in providing the latest information. This research reports how to combine worldwide data, project organization and some results of the major meteor showers in 2001 and 2002.

Ogawa, H.; Toyomasu, S.; Ohnishi, K.; Maegawa, K.; Amikura, S.; Miyao, K.

226

A Planetary System Exploration Project for Introductory Astronomy and Astrobiology Courses  

NASA Astrophysics Data System (ADS)

I have created three-part projects for the introductory astronomy and astrobiology courses at Westfield State University which simulate the exploration of a fictional planetary system. The introductory astronomy project is an initial reconnaissance of the system by a robotic spacecraft, culminating in close flybys of two or three planets. The astrobiology project is a follow-up mission concluding with the landing of a roving lander on a planet or moon. Student responses in earlier parts of each project can be used to determine which planets are targeted for closer study in later parts. Highly realistic views of the planets from space and from their surfaces can be created using programs such as Celestia and Terragen; images and video returned by the spacecraft are thus a highlight of the project. Although designed around the particular needs and mechanics of the introductory astronomy and astrobiology courses for non-majors at WSU, these projects could be adapted for use in courses at many different levels.

Rees, Richard F.

2015-01-01

227

The Harvard Radio Meteor Project Meteor Velocity Distribution Reappraised  

Microsoft Academic Search

The relative distribution of atmospheric encounter speeds at constant mass for observations made as part of the Harvard Radio Meteor Project synodic year observations has been recalculated using a cumulative mass index, ? = 1.1 ± 0.1, and the mass velocity relation from F. Verniani (1973, J. Geophys. Res. 78, 8429-8462), ? = 4.23 ± 0.07. A discrepency in the

A. D. Taylor

1995-01-01

228

Using an Observatory Project to Develop Professional Communication in Astronomy  

NSDL National Science Digital Library

This is a comprehensive project using the Highland Road Park Observatory camera. This project encompasses the formal portions for both written and spoken communication, and carries 55% of the course credit.

Dr. Robert Hynes, Assistant Professor, Physics & Astronomy, Louisiana State University

229

The Eclipsing Radio Emission of the Precataclysmic Binary Institute of Astronomy & Astrophysics, Academia Sinica,  

E-print Network

The Eclipsing Radio Emission of the Precataclysmic Binary V471 Tau Jeremy Lim Institute confirming the presence of eclipses in the centime­ ter radio emission of the eclipsing binary V471 Tau eclipse per orbit: in all we observed one near--complete radio eclipse, the ingress phase of two other

White, Stephen

230

Astronomy Looks Different When You Listen to It.  

ERIC Educational Resources Information Center

Describes the use of a radio telescope to arouse new interest among students. The article partitions into the following sections: (1) Radio Astronomy--Which Level; (2) First Steps: The Site--The Antenna; (3) The Electronics: Do It Yourself, or Store Bought; (4) Field Test: Music of the Spheres; (5) Getting Started: Entry Level Projects; and (6)…

Jones, Richard C.

1994-01-01

231

Radio Astronomy Beam Forming on Many-Core Architectures Alessio Sclocco, Ana Lucia Varbanescu  

E-print Network

, omni- directional antennas instead, a novel design that promises ground-breaking research in astronomy. Where traditional tele- scopes use custom-built hardware, LOFAR uses software to do signal processing with the complexity of this scenario, telescopes rapidly evolve into software telescopes, while they used hardware

van Nieuwpoort, Rob V.

232

Discovering astronomy  

NASA Technical Reports Server (NTRS)

An overview of basic astronomical knowledge is presented with attention to the structure and dynamics of the stars and planets. Also dealt with are techniques of astronomical measurement, e.g., stellar spectrometry, radio astronomy, star catalogs, etc. Basic physical principles as they pertain to astronomy are reviewed, including the nature of light, gravitation, and electromagnetism. Finally, stellar evolution and cosmology are discussed with reference to the possibility of life elsewhere in the universe.

Chapman, R. D.

1978-01-01

233

New Astronomy  

NSDL National Science Digital Library

Elsevier Science began a fully electronic and refereed journal in astronomy and astrophysics in 1996. "New Astronomy" is available via the Web as well as in print. Elsevier states the journal will publish "articles in all fields of astronomy and astrophysics: theoretical, observational and instrumental. 'New Astronomy' includes full length research articles and letter articles. The journal covers solar, stellar, galactic and extragalactic astronomy and astrophysics. It reports on original research in all wavelength bands, ranging from radio to gamma-ray." The journal's Web site provides a listing of receiving editors, as well as a call for papers. It will be a scholarly journal of "rigorously refereed" papers and aims to provide a short publication time, with accepted articles being made immediately available electronically. Detailed instructions on submittal are at the site.

234

The Ilgarijiri Project: A collaboration between Aboriginal communities and radio astronomers in the Murchison Region of Western Australia  

NASA Astrophysics Data System (ADS)

The international radio astronomy initiative known as the Square Kilometre Array is a cutting-edge science project, aimed atdramatically expanding our vision and understanding of the Universe. The $2billion+ international project is being shared between Southern Africa and Australia. The Australian component, centred in the Murchison region of Western Australia, is based upon collaboration with Aboriginal communities. A collaborative project called "Ilgarijiri- Things Belonging to the Sky" shared scientific and Aboriginal knowledge of the night sky. Through a series of collaborative meetings and knowledge sharing, the Ilgarijiri project developed and showcased Aboriginal knowledge of the night sky, via an international touring Aboriginal art exhibition, in Australia, South Africa, the USA and Europe. The Aboriginal art exhibition presents Aboriginal stories relating to the night sky, which prominently feature the 'Seven Sisters' and the 'Emu', as well as the collaborative experience with radio astronomers. The success of the Ilgarijiri collaborative project is based upon several principles, which can help to inform and guide future cultural collaborative projects.

Goldsmith, John

2014-07-01

235

A Voyage through the Radio Universe  

NSDL National Science Digital Library

The Radio Astronomy Research Team from from Oil City Area Senior High School (OCHS) in Oil City, Pennsylvania, embarked on a special project titled "Mapping the Universe" at the start of the 2000 school year. For the project, students analyzed data from the Arecibo Radio Telescope, which is the world's largest single dish radio telescope, in an effort to learn more about distant galaxies. Students used the information they gathered to calculate the Hubble constant--an accomplishment usually achieved by professional astronomers.

Timothy Spuck

2004-10-01

236

Past, Present and Future of Chinese Astronomy  

NASA Astrophysics Data System (ADS)

Through out the ancient history, Chinese astronomers had made tremendous achievements. Since the main purpose of the ancient Chinese astronomy was to study the correlation between man and the universe, all the Emperors made ancient Chinese astronomy the highly regarded science throughout the history. After a brief introduction of the achievement of ancient Chinese astronomy, I describe the beginnings of modern astronomy research in China in the 20th century. Benefiting from the fast development of Chinese economy, the research in astronomy in China has made remarkable progress in recent years. The number of astronomers has doubled in the past ten years, and the number of graduate students has grown over 1300. The current budget for astronomy research is ten times larger than that ten years ago. The research covers all fields in astronomy, from galaxies to the Sun. The recent progress in both the instruments, such as the Guo Shoujing's telescope, a Large Sky Area Multi-Object Fiber Spectroscopic Telescope (LAMOST), and the theoretical research will be briefly presented. The ongoing and future projects on the space- and ground-based facilities will be described, including the Five Hundred Meter Aperture Spherical Radio Telescope (FAST), ``Chang E'' (Lunar mission) project, Hard X-ray Modulate Telescope (HXMT), DArk Matter Particle Explorer (DAMPE), Deep Space Solar Observatory (DSO), Chinese Antarctic Observatory (CAO), 65m steerable radio telescope, Chinese Spectral Radioheliogaph (CSRH) etc.

Fang, Cheng

2015-03-01

237

National Astronomy and Ionosphere Center: Arecibo Observatory  

NSDL National Science Digital Library

The 305m radio telescope at the Arecibo Observatory "is the largest single-dish radio telescope on our planet and is available to the global scientific community for astronomical observation at wavelengths between 6 m and 3 m." Researchers can search WAPP data and information about past, present, and future projects at the Observatory. The extensive website provides numerous data reduction packages and file formats. Users can find extensive materials on the planetary studies, space and atmospheric science, and astronomy occurring at the observatory. Students and educators can learn about Arecibo's summer program. The News link is filled with fascinating new accomplishments, employment opportunities, and upcoming astronomy talks and seminars.

238

The Five-Hundred Aperture Spherical Radio Telescope (fast) Project  

NASA Astrophysics Data System (ADS)

Five-hundred-meter Aperture Spherical radio Telescope (FAST) is a Chinese mega-science project to build the largest single dish radio telescope in the world. Its innovative engineering concept and design pave a new road to realize a huge single dish in the most effective way. FAST also represents Chinese contribution in the international efforts to build the square kilometer array (SKA). Being the most sensitive single dish radio telescope, FAST will enable astronomers to jump-start many science goals, such as surveying the neutral hydrogen in the Milky Way and other galaxies, detecting faint pulsars, looking for the first shining stars, hearing the possible signals from other civilizations, etc. The idea of sitting a large spherical dish in a karst depression is rooted in Arecibo telescope. FAST is an Arecibo-type antenna with three outstanding aspects: the karst depression used as the site, which is large to host the 500-meter telescope and deep to allow a zenith angle of 40 degrees; the active main reflector correcting for spherical aberration on the ground to achieve a full polarization and a wide band without involving complex feed systems; and the light-weight feed cabin driven by cables and servomechanism plus a parallel robot as a secondary adjustable system to move with high precision. The feasibility studies for FAST have been carried out for 14 years, supported by Chinese and world astronomical communities. Funding for FAST has been approved by the National Development and Reform Commission in July of 2007 with a capital budget ~ 700 million RMB. The project time is 5.5 years from the commencement of work in March of 2011 and the first light is expected to be in 2016. This review intends to introduce the project of FAST with emphasis on the recent progress since 2006. In this paper, the subsystems of FAST are described in modest details followed by discussions of the fundamental science goals and examples of early science projects.

Nan, Rendong; Li, Di; Jin, Chengjin; Wang, Qiming; Zhu, Lichun; Zhu, Wenbai; Zhang, Haiyan; Yue, Youling; Qian, Lei

239

Project ASTRO NOVA brings Standard Based Astronomy to New Jersey Schools.  

NASA Astrophysics Data System (ADS)

Begun in 1998, Project ASTRO NOVA is hosted by the Planetarium at Raritan Valley Community College in Somerville, New Jersey. It is part of a National Network of eleven Project ASTRO sites created by the Astronomical Society of the Pacific with financial support of the National Science Foundation (see other papers at this meeting). Our goal is to bring hands-on inquiry based astronomy into classrooms and help teachers meet the New Jersey Science Standards. New Jersey mandates the teaching of astronomy in grades K-12 and statewide assessment takes place in grades 4 and 8. Capitalizing on New Jersey's record number of amateur astronomers per capita our site has trained 75 astronomers (including 21 professional astronomers) over the last three years. Before the start of each school year a new group of astronomers is trained together with their partner teacher(s) in the use of hands-on and age-appropriate astronomy activities that support the New Jersey Science Standards. Astronomers adopt a classroom and visit the same students at least four times during the year. Currently 53 astronomers are participating during the 2000-2001 school year. The program in New Jersey targets teachers in grades 3-9. A total of 114 teachers have been training at our annual workshops and 75 of them are participating during the 2000-2001 school year. Satisfaction with the program has been high with students, teachers and astronomers. When students meet scientists as role models and experience that doing science can be a lot of fun they become more interested. At the same time teachers are re-energized and gain a better understanding of how to teach science and astronomy. Finally, astronomers have the satisfaction of making a real difference in the lives of thousands of children, gain a better understanding of the issues in K-12 education and learn new teaching strategies for use in their college classes or astronomy clubs. In general we find that students and teachers are becoming better astronomers and scientists and that astronomers are becoming better teachers. Project ASTRO NOVA acknowledges support from the National Science Foundation, the 3M Corporation, the New York Mercantile Exchange Charitable Foundation and the New Jersey Space Grant Consortium.

van der Veen, W.; Vinski, J.; Gallagher, A. C.

2000-12-01

240

A Review of High School Level Astronomy Student Research Projects over the last two decades  

E-print Network

Since the early 1990s with the arrival of a variety of new technologies, the capacity for authentic astronomical research at the high school level has skyrocketed. This potential, however, has not realized the bright-eyed hopes and dreams of the early pioneers who expected to revolutionise science education through the use of telescopes and other astronomical instrumentation in the classroom. In this paper, a general history and analysis of these attempts is presented. We define what we classify as an Astronomy Research in the Classroom (ARiC) project and note the major dimensions on which these projects differ before describing the 22 major student research projects active since the early 1990s. This is followed by a discussion of the major issues identified that affected the success of these projects and provide suggestions for similar attempts in the future.

Fitzgerald, Michael T; Rebull, Luisa M; Danaia, Lena; McKinnon, David H

2014-01-01

241

A Review of High School Level Astronomy Student Research Projects Over the Last Two Decades  

NASA Astrophysics Data System (ADS)

Since the early 1990s with the arrival of a variety of new technologies, the capacity for authentic astronomical research at the high school level has skyrocketed. This potential, however, has not realised the bright-eyed hopes and dreams of the early pioneers who expected to revolutionise science education through the use of telescopes and other astronomical instrumentation in the classroom. In this paper, a general history and analysis of these attempts is presented. We define what we classify as an Astronomy Research in the Classroom (ARiC) project and note the major dimensions on which these projects differ before describing the 22 major student research projects active since the early 1990s. This is followed by a discussion of the major issues identified that affected the success of these projects and provide suggestions for similar attempts in the future.

Fitzgerald, M. T.; Hollow, R.; Rebull, L. M.; Danaia, L.; McKinnon, D. H.

2014-09-01

242

Characterizing Interference in Radio Astronomy Observations through Active and Unsupervised Learning  

NASA Technical Reports Server (NTRS)

In the process of observing signals from astronomical sources, radio astronomers must mitigate the effects of manmade radio sources such as cell phones, satellites, aircraft, and observatory equipment. Radio frequency interference (RFI) often occurs as short bursts (< 1 ms) across a broad range of frequencies, and can be confused with signals from sources of interest such as pulsars. With ever-increasing volumes of data being produced by observatories, automated strategies are required to detect, classify, and characterize these short "transient" RFI events. We investigate an active learning approach in which an astronomer labels events that are most confusing to a classifier, minimizing the human effort required for classification. We also explore the use of unsupervised clustering techniques, which automatically group events into classes without user input. We apply these techniques to data from the Parkes Multibeam Pulsar Survey to characterize several million detected RFI events from over a thousand hours of observation.

Doran, G.

2013-01-01

243

Analysis of the Capability and Limitations of Relativistic Gravity Measurements Using Radio Astronomy Methods  

NASA Technical Reports Server (NTRS)

The uses of radar observations of planets and very-long-baseline radio interferometric observations of extragalactic objects to test theories of gravitation are described in detail with special emphasis on sources of error. The accuracy achievable in these tests with data already obtained, can be summarized in terms of: retardation of signal propagation (radar), deflection of radio waves (interferometry), advance of planetary perihelia (radar), gravitational quadrupole moment of sun (radar), and time variation of gravitational constant (radar). The analyses completed to date have yielded no significant disagreement with the predictions of general relativity.

Shapiro, I. I.; Counselman, C. C., III

1975-01-01

244

Effects of the Earth's Ionosphere on HF Radio Astronomy from Artificial Satellites  

Microsoft Academic Search

A theoretical analysis of the effects of the ionosphere on HF observations from satellite-borne radio telescopes is presented. The primary effect investigated is the focusing effect of the ionosphere on incoming cosmic noise. This effect was computed according to the Hamiltonian equations for a ray path in a general magnetoionic medium, assuming the ionosphere to be a nonhomogenous, nonisotropic, magnetoionic

M. D. Grossi; K. M. Strom; S. E. Strom

1961-01-01

245

Infrared Astronomy  

NSDL National Science Digital Library

NASA's Infrared Processing and Analysis Center (IPAC) provides the Infrared Astronomy Website as one of its outreach programs. Infrared Astronomy, or "the detection and study of the infrared radiation (heat energy) emitted from objects in the Universe," is described and placed in context in the sections Discovery of Infrared, What is Infrared, Infrared Astronomy, Background, and the Infrared Universe. For current information, see the News & Discoveries, Active/ Future Projects, and Activities sections; past and current projects supported by IPAC are featured in the Infrared Gallery. The site targets a broad audience and is geared towards many learning levels.

246

Radio telescopes  

Microsoft Academic Search

A radio telescope is used in radio astronomy to measure the intensity of the radiation received from various parts of the sky. Such a telescope must be able both to detect and to locate faint radio sources of small angular size, and also to measure the brightness distribution across extended radio sources or over large sky areas. Ideally the telescope

J. Findlay

1964-01-01

247

Low noise, 0.4-3 GHz cryogenic receiver for radio astronomy.  

PubMed

We present the design and measurement of a radio telescope receiver front end cooled to 100 K physical temperature, and working over 400 MHz to 3 GHz frequency band. The system uses a frequency independent feed developed for operation as a feed for parabola using sinuous elements and integrated with an ultra-wideband low noise amplifier. The ambient temperature system is tested on the 43 m radio telescope in Green Bank, WV and the system verification results on the sky are presented. The cryogenic receiver is developed using a Stirling cycle, one stage cryocooler. The measured far field patterns and the system noise less than 80 K over a 5:1 bandwidth are presented. PMID:25362437

Gawande, R; Bradley, R; Langston, G

2014-10-01

248

The energy of electron beams near the Io footprint derived from radio-astronomy observations.  

NASA Astrophysics Data System (ADS)

The energy of Jupiter-Io auroral electrons can be inferred through the analysis of decametric radio emissions, especially that of millisecond bursts. Jovian millisecond (or S-)bursts are intense impulsive decametric radio bursts drifting in frequency in tens of milliseconds. Previous analyses suggest that S-bursts are cyclotron-maser emission in the flux tubes connecting Io or Io's wake to Jupiter. Electrons are thought to be accelerated from Io to Jupiter. Near Jupiter, a loss cone appears in the magnetically mirrored electron population, which is able to amplify extraordinary (X) mode radio waves. Most of the theories about their origin include an interpretation of their frequency drift. We have analysed two sets of data collected at the DAM Nançay and Karkhov radio-telescopes; they are consistent with the above scenario. In addition, we confirm that the frequency drift df/dt(f) is negative on average and decreases in absolute value at high frequencies, consistent with the adiabatic theory of particles motion. We find a typical energy of 4 keV for the emitting electrons. In many cases, we find evidence of localized ~ 1 kV electric potential jumps at high latitudes along magnetic field lines connecting Io or Io's wake to Jupiter. These potential jumps are stable over tens of minutes and propagate upward with a velocity of the order of the sound velocity. We will discuss the consistency of such ~ 4 keV electron populations with other energy estimates derived from observations of the UV Jupiter-Io auroras.

Mottez, F.; Hess, S.; Zarka, P.; Prangé, R.

2008-12-01

249

Light Pollution in Lowndes County, Georgia: An Observational Project for Introductory Astronomy Students  

NASA Astrophysics Data System (ADS)

A long-term study of light pollution in Lowndes County, Georgia has been initiated as a collaborative project among students enrolled in introductory astronomy courses at Valdosta State University. A single honors student began the project in Spring 2000; during the Fall 2000 semester all students enrolled in ASTR 1020K (Stellar and Galactic Astronomy) were invited to participate on a voluntary basis. Students were provided with charts showing the appearance of the constellations Cygnus, Pegasus, Cassiopeia, and Orion (as appropriate) at limiting magnitudes ranging from 2.5 to 6.0 in 0.5-magnitude steps. On clear, moonless nights students compared the visual appearance of these constellations to the charts, allowing them to determine a limiting magnitude for their location. Preliminary results suggest that, even on the clearest nights, stars fainter than magnitude 5.0 are not visible from any location within Lowndes County. This limitation results largely from ambient light from Valdosta, the only urban area within the county, and also from atmospheric extinction in a region of high humidity. By participating in this exercise, students in a class traditionally populated by non-science majors gain an appreciation for the collaborative nature of modern science. They also become familiar more familiar with the night sky than they might were their exposure limited to the traditional two-hour weekly laboratory session. Most importantly, as young adults they experience first-hand the deleterious effects of light intrusion upon their enjoyment of the night sky!

Rumstay, K. S.; VSU Astronomy Students Team

2000-12-01

250

Molecular Clouds and Clumps in the Boston University-Five College Radio Astronomy Observatory Galactic Ring Survey  

NASA Astrophysics Data System (ADS)

The Boston University-Five College Radio Astronomy Observatory (BU-FCRAO) Galactic Ring Survey (GRS) of 13CO J = 1 ? 0 emission covers Galactic longitudes 18° < ell < 55fdg7 and Galactic latitudes |b| <= 1°. Using the SEQUOIA array on the FCRAO 14 m telescope, the GRS fully sampled the 13CO Galactic emission (46'' angular resolution on a 22'' grid) and achieved a spectral resolution of 0.21 km s-1. Because the GRS uses 13CO, an optically thin tracer, rather than 12CO, an optically thick tracer, the GRS allows a much better determination of column density and also a cleaner separation of velocity components along a line of sight. With this homogeneous, fully sampled survey of 13CO emission, we have identified 829 molecular clouds and 6124 clumps throughout the inner Galaxy using the CLUMPFIND algorithm. Here we present details of the catalog and a preliminary analysis of the properties of the molecular clouds and their clumps. Moreover, we compare clouds inside and outside of the 5 kpc ring and find that clouds within the ring typically have warmer temperatures, higher column densities, larger areas, and more clumps compared with clouds located outside the ring. This is expected if these clouds are actively forming stars. This catalog provides a useful tool for the study of molecular clouds and their embedded young stellar objects.

Rathborne, J. M.; Johnson, A. M.; Jackson, J. M.; Shah, R. Y.; Simon, R.

2009-05-01

251

A scientific program for infrared, submillimeter and radio astronomy from space: A report by the Management Operations Working Group  

NASA Technical Reports Server (NTRS)

Important and fundamental scientific progress can be attained through space observations in the wavelengths longward of 1 micron. The formation of galaxies, stars, and planets, the origin of quasars and the nature of active galactic nuclei, the large scale structure of the Universe, and the problem of the missing mass, are among the major scientific issues that can be addressed by these observations. Significant advances in many areas of astrophysics can be made over the next 20 years by implementing the outlined program. This program combines large observatories with smaller projects to create an overall scheme that emphasized complementarity and synergy, advanced technology, community support and development, and the training of the next generation of scientists. Key aspects of the program include: the Space Infrared Telescope Facility; the Stratospheric Observatory for Infrared Astronomy; a robust program of small missions; and the creation of the technology base for future major observatories.

1989-01-01

252

Research Projects and Undergraduate Retention at the University of Arizona  

NASA Astrophysics Data System (ADS)

The University of Arizona’s Astronomy Club utilizes its access to the many telescopes in and around Tucson, Arizona, to allow students to fully participate in a variety of research projects. Three current projects - the exoplanet project, the radio astronomy project, and the Kepler project - all work to give undergraduates who are interested in astronomy the opportunity to explore practical astronomy outside the classroom and in a peer-supported environment. The exoplanet project strives to teach students about the research process, including observing exoplanet transits on the Steward Observatory 61” Kuiper telescope on Mt. Bigelow in Tucson, AZ, reducing the data into lightcurves with the Image Reduction and Analysis Facility (IRAF), modeling the lightcurves using the Interactive Data Language (IDL), and writing and publishing a professional paper, and does it all with no faculty involvement. The radio astronomy project is designed to provide students with an opportunity to work with a professor on a radio astronomy research project, and to learn about the research process, including observing molecules in molecular clouds using the Arizona Radio Observatory 12-meter radio telescope on Kitt Peak in Arizona. The Kepler project is a new project designed in part to facilitate graduate-undergraduate interaction in the Astronomy Department, and in part to allow students (both graduate and undergraduate) to participate in star-spot cycle research using data from the Kepler Mission. All of these research projects and structures provide students with unique access to telescopes, peer mentoring, networking, and understanding the entire process of astronomical research.

Walker-LaFollette, Amanda; Hardegree-Ullman, K.; Towner, A. P.; McGraw, A. M.; Biddle, L. I.; Robertson, A.; Turner, J.; Smith, C.

2013-06-01

253

Scientific prospects in soft gamma-ray astronomy enabled by the LAUE project  

NASA Astrophysics Data System (ADS)

This paper summarizes the development of a successful project, LAUE, supported by the Italian Space Agency (ASI) and devoted to the development of long foca length (up to 100—m) Laue lenses for hard X-/soft gamma- ray astronomy (80-600 keV). The apparatus is ready and the assembling of a prototype lens petal is ongoing. The great achievement of this project is the use of bent crystals. From measurements obtained on single crystals and from simulations, we have estimated the expected Point Spread Function and thus the sensitivity of a lens made of petals. The expected sensitivity is a few ×10-8 photons cm-2 s-1 keV-1). We discuss a number of open astrophysical questions that can settled with such an instrument aboard a free-flying satellite.

Frontera, F.; Virgilli, E.; Valsan, V.; Liccardo, V.; Carassiti, V.; Caroli, E.; Cassese, F.; Ferrari, C.; Guidi, V.; Mottini, S.; Pecora, M.; Negri, B.; Recanatesi, L.; Amati, L.; Auricchio, N.; Bassani, L.; Campana, R.; Farinelli, R.; Guidorzi, C.; Labanti, C.; Landi, R.; Malizia, A.; Orlandini, M.; Rosati, P.; Sguera, V.; Stephen, J.; Titarchuk, L.

2013-09-01

254

Controller-area-network bus control and monitor system for a radio astronomy interferometer.  

PubMed

We describe the design and implementation of a controller-area-network bus (CANbus) monitor and control system for a millimeter wave interferometer. The Combined Array for Research in Millimeter-wave Astronomy (CARMA) is a 15-antenna connected-element interferometer for astronomical imaging, created by the merger of two university observatories. Its new control system relies on a central computer supervising a variety of subsystem computers, many of which control distributed intelligent nodes over CANbus. Subsystems are located in the control building and in individual antennas and communicate with the central computer via Ethernet. Each of the CAN modules has a very specific function, such as reading an antenna encoder or tuning an oscillator. Hardware for the modules was based on a core design including a commercial CANbus-enabled single-board computer and some standard circuitry for interfacing to peripherals. Hardware elements were added or changed as necessary for the specific module types. Similarly, a base set of embedded code was implemented for essential common functions such as CAN message handling and time keeping and extended to implement the required functionality for the different hardware. Using a standard CAN messaging protocol designed to fit the requirements of CARMA and a well-defined interface to the high-level software allowed separate development of high-level code and embedded code with minimal integration problems. Over 30 module types have been implemented and successfully deployed in CARMA, which is now delivering excellent new science data. PMID:17902962

Woody, David P; Wiitala, Bradley; Scott, Stephen L; Lamb, James W; Lawrence, Ronald P; Giovanine, Curt; Fredsti, Sancar J; Beard, Andrew; Pryke, Clem; Loh, Michael; Greer, Christopher H; Cartwright, John K; Gutierrez-Kraybill, Colby; Bolatto, Alberto D; Muchovej, Stephen J C

2007-09-01

255

Controller-area-network bus control and monitor system for a radio astronomy interferometer  

NASA Astrophysics Data System (ADS)

We describe the design and implementation of a controller-area-network bus (CANbus) monitor and control system for a millimeter wave interferometer. The Combined Array for Research in Millimeter-wave Astronomy (CARMA) is a 15-antenna connected-element interferometer for astronomical imaging, created by the merger of two university observatories. Its new control system relies on a central computer supervising a variety of subsystem computers, many of which control distributed intelligent nodes over CANbus. Subsystems are located in the control building and in individual antennas and communicate with the central computer via Ethernet. Each of the CAN modules has a very specific function, such as reading an antenna encoder or tuning an oscillator. Hardware for the modules was based on a core design including a commercial CANbus-enabled single-board computer and some standard circuitry for interfacing to peripherals. Hardware elements were added or changed as necessary for the specific module types. Similarly, a base set of embedded code was implemented for essential common functions such as CAN message handling and time keeping and extended to implement the required functionality for the different hardware. Using a standard CAN messaging protocol designed to fit the requirements of CARMA and a well-defined interface to the high-level software allowed separate development of high-level code and embedded code with minimal integration problems. Over 30 module types have been implemented and successfully deployed in CARMA, which is now delivering excellent new science data.

Woody, David P.; Wiitala, Bradley; Scott, Stephen L.; Lamb, James W.; Lawrence, Ronald P.; Giovanine, Curt; Fredsti, Sancar J.; Beard, Andrew; Pryke, Clem; Loh, Michael; Greer, Christopher H.; Cartwright, John K.; Gutierrez-Kraybill, Colby; Bolatto, Alberto D.; Muchovej, Stephen J. C.

2007-09-01

256

The Quiet Skies Project  

ERIC Educational Resources Information Center

To help promote student awareness of the connection between radio astronomy and radio frequency interference (RFI), an inquiry-based science curriculum was developed to allow high school students to determine RFI levels in their communities. The Quiet Skies Project--the result of a collaboration between the National Aeronautics and Space…

Rapp, Steve

2008-01-01

257

Goldstone Apple Valley Radio Telescope  

NSDL National Science Digital Library

This is a fact sheet describing the GAVRT program. This educational program uses a 34-meter antenna for classroom radio astronomy observations via the Internet. The GAVRT Project introduces students in elementary through high school grades to the process of science with the goal of improving science literacy among American students.

258

The Radio Sky in the STARLAB  

NASA Astrophysics Data System (ADS)

The STARLAB is a portable planetarium created, produced, and distributed by Learning Technologies, Ltd. Upon entering the STARLAB, images are projected onto the ceiling of the planetarium's dome using custom, interchangeable projection cylinders mounted on top of an ultrabright point light source. The STARLAB is ideal for teaching students about astronomy since it may be easily transported to schools across the nation. In order to take advantage of this powerful teaching tool, one of the foremost priorities of the Sensing the Radio Sky project was the development a projection cylinder that would visually interpret the quantitative data taken with radio telescopes and present that information in a form that students could understand and appreciate. The final version of the cylinder demonstrates a variety of topics relevant to an understanding of radio astronomy. When using the Radio Sky cylinder in the STARLAB, teachers may discuss the differences between optical and radio astronomy such as the structure of the Milky Way Galaxy, different sources of electromagnetic radiation, and important radio sources within and outside of the Galaxy. In addition, the flexibility of the cylinder's design allows for a variety of educational activities to be conducted within the STARLAB, all complemented by the Radio Sky cylinder's unique presentation of the Galaxy in radio wavelengths. We acknowledge support from the NSF Internship in Public Science Education Program grant number 0324729.

Fultz, C.; Smith, T.; Buck, S.; Harris, R.; Boltuch, D.; Hund, L.; Moffett, D.; Walsh, L.; LaFratta, M.; Castelaz, M. W.

2005-12-01

259

INSPIRE: A VLF Radio Project for High School Students  

ERIC Educational Resources Information Center

Since 1988 the Interactive NASA Space Physics Ionospheric Radio Experiment, or INSPIRE, has given students the opportunity to build research-quality VLF radio receivers and make observations of both natural and stimulated radio waves in the atmosphere. Any high school science class is eligible to join the INSPIRE volunteer observing network and…

Marshall, Jill A.; Pine, Bill; Taylor, William W. L.

2007-01-01

260

Two Eyes, 3D: A New Project to Study Stereoscopy in Astronomy Education  

NASA Astrophysics Data System (ADS)

"Two Eyes, 3D" is a 3-year NSF funded research project to study the educational impacts of using stereoscopic representations in informal settings. The project funds two experimental studies. The first is focused on how children perceive various spatial qualities of scientific objects displayed in static 2D and 3D formats. The second is focused on how adults perceive various spatial qualities of scientific objects and processes displayed in 2D and 3D movie formats. As part of the project, two brief high-definition films about variable stars will be developed. Both studies will be mixed-method and look at prior spatial ability and other demographic variables as covariates. The project is run by the American Association of Variable Star Observers, Boston Museum of Science and the Adler Planetarium and Astronomy Museum with consulting from the California Academy of Sciences. Early pilot results will be presented. All films will be released into the public domain, as will the assessment software designed to run on tablet computers (iOS or Android).

Price, Aaron; SubbaRao, M.; Wyatt, R.

2012-01-01

261

Sustainable Astronomy  

NASA Astrophysics Data System (ADS)

Through our International Year of Astronomy outreach effort, we established a sustainable astronomy program and curriculum in the Northfield, Minnesota community. Carleton College offers monthly open houses at Goodsell Observatory and donated its recently "retire" observing equipment to local schools. While public evenings continue to be popular, the donated equipment was underutilized due to a lack of trained student observing assistants. With sponsorship from NASA's IYA Student Ambassador program, the sustainable astronomy project began in 2009 to generate greater interest in astronomy and train middle school and high school students as observing assistants. Carleton physics majors developed curricular materials and instituted regular outreach programs for grades 6-12. The Northfield High School Astronomy Club was created, and Carleton undergraduates taught high school students how to use telescopes and do CCD imaging. During the summer of 2009, Carleton students began the Young Astronomers Summer Experience (YASE) program for middle school students and offered a two-week, astronomy-rich observing and imaging experience at Goodsell Observatory. In concert with NASA's Summer of Innovation initiative, the YASE program was offered again in 2010 and engaged a new group of local middle school students in hands-on scientific experiments and observing opportunities. Members of the high school astronomy club now volunteer as observing assistants in the community and graduates of the YASE programs are eager to continue observing as members of a public service astronomy club when they enter the Northfield High School. These projects are training future scientists and will sustain the public's interest in astronomy long after the end of IYA 2009.

Blaha, C.; Goetz, J.; Johnson, T.

2011-09-01

262

Absolute Calibration of the Radio Astronomy Flux Density Scale from 22 to 43 GHz using Planck  

NASA Astrophysics Data System (ADS)

The Planck mission detected hundreds of extragalactic radio sources at frequencies from 28 to 857 GHz. Since Planck's calibration is absolute, based on the satellite's annual motion around the Sun, and since its beams are well-characterized at the sub-percent levels, Planck's flux density measurements are absolute to percent-level accuracy. We have made coordinated Planck, VLA and ATCA observations of ~60 strong, unresolved sources in order to compare Planck's absolute calibration to that used by these two interferometers at 22, 28 and 43 GHz. The flux densities of the sources used to calibrate the VLA observations are taken from Perley and Butler (2013), which is fundamentally based on models of the planet Mars calibrated via WMAP observations. The flux densities of the sources used to calibrate the ATCA observations are based on models of the planet Uranus. Despite the scatter introduced by the variability of many of the sources, the three flux density scales are determined to agree to 1-2% accuracy.

Butler, Bryan J.; Partridge, R. Bruce; Perley, Richard A.; Stevens, Jamie B.; Lopez-Caniego, Marcos; Rocha, Graca; Walter, Ben Z.; Zacchei, Andrea

2015-01-01

263

Digital Signal Processing Using Stream High Performance Computing: A 512-Input Broadband Correlator for Radio Astronomy  

NASA Astrophysics Data System (ADS)

A "large-N" correlator that makes use of Field Programmable Gate Arrays and Graphics Processing Units has been deployed as the digital signal processing system for the Long Wavelength Array station at Owens Valley Radio Observatory (LWA-OV), to enable the Large Aperture Experiment to Detect the Dark Ages (LEDA). The system samples a ˜ 100 MHz baseband and processes signals from 512 antennas (256 dual polarization) over a ˜ 58 MHz instantaneous sub-band, achieving 16.8 Tops s-1 and 0.236 Tbit s-1 throughput in a 9 kW envelope and single rack footprint. The output data rate is 260 MB s-1 for 9-s time averaging of cross-power and 1 s averaging of total power data. At deployment, the LWA-OV correlator was the largest in production in terms of N and is the third largest in terms of complex multiply accumulations, after the Very Large Array and Atacama Large Millimeter Array. The correlator's comparatively fast development time and low cost establish a practical foundation for the scalability of a modular, heterogeneous, computing architecture.

Kocz, J.; Greenhill, L. J.; Barsdell, B. R.; Price, D.; Bernardi, G.; Bourke, S.; Clark, M. A.; Craig, J.; Dexter, M.; Dowell, J.; Eftekhari, T.; Ellingson, S.; Hallinan, G.; Hartman, J.; Jameson, A.; MacMahon, D.; Taylor, G.; Schinzel, F.; Werthimer, D.

2015-03-01

264

Peta-Flop Real Time Radio Astronomy Signal Processing Instrumentation and the CASPER Collaboration  

NASA Astrophysics Data System (ADS)

I will briefly describe next generation radio telescopes, such as HERA and the Square Kilometer Array (SKA), which will require 1E15 to 1E17 operations per second of real time processing. I'll present some of the new architectures we've used to develop a variety of heterogeneous FPGA-GPU-CPU based signal processing systems for such telescopes, including spectrometers, correlators, and beam formers. I will also describe the CASPER collaboration, which has developed architectures, open source programming tools, libraries and reference designs that make it relatively easy to develop a variety of scalable, upgradeable, fault tolerant, low power, real time digital signal processing instrumentation. CASPER utilizes commercial 10Gbit and 40 Gbit ethernet switches to interconnect open source general purpose field programmable gate array (FPGA) boards with GPUs and software modules. CASPER collaborators at hundreds of universities, government labs and observatories have used these techniques to rapidly develop and deploy a variety of correlators, beamformers, spectrometers, pulsar/transient machines, and VLBI instrumentation. CASPER instrumentation is also utilized in physics, medicine, genomics and engineering. Open source source hardware, software, libraries, tools, tutorials, reference designs, information about workshops, and how to join the collaboration are available at http://casper.berkeley.edu

Werthimer, Dan

2014-04-01

265

Fast gain calibration in radio astronomy using alternating direction implicit methods: Analysis and applications  

NASA Astrophysics Data System (ADS)

Context. Modern radio astronomical arrays have (or will have) more than one order of magnitude more receivers than classical synthesis arrays, such as the VLA and the WSRT. This makes gain calibration a computationally demanding task. Several alternating direction implicit (ADI) approaches have therefore been proposed that reduce numerical complexity for this task from 𝒪(P3) to 𝒪(P2), where P is the number of receive paths to be calibrated Aims: We present an ADI method, show that it converges to the optimal solution, and assess its numerical, computational and statistical performance. We also discuss its suitability for application in self-calibration and report on its successful application in LOFAR standard pipelines. Methods: Convergence is proved by rigorous mathematical analysis using a contraction mapping. Its numerical, algorithmic, and statistical performance, as well as its suitability for application in self-calibration, are assessed using simulations. Results: Our simulations confirm the 𝒪(P2) complexity and excellent numerical and computational properties of the algorithm. They also confirm that the algorithm performs at or close to the Cramer-Rao bound (CRB, lower bound on the variance of estimated parameters). We find that the algorithm is suitable for application in self-calibration and discuss how it can be included. We demonstrate an order-of-magnitude speed improvement in calibration over traditional methods on actual LOFAR data. Conclusions: In this paper, we demonstrate that ADI methods are a valid and computationally more efficient alternative to traditional gain calibration methods and we report on its successful application in a number of actual data reduction pipelines.

Salvini, Stefano; Wijnholds, Stefan J.

2014-11-01

266

Dark Skies Awareness Cornerstone Project for the International Year of Astronomy  

NASA Astrophysics Data System (ADS)

Programs that were part of the International Year of Astronomy 2009 (IYA2009) Dark Skies Awareness (DSA) Cornerstone Project have been successfully implemented around the world to promote social awareness of the effects of light pollution on public health, economic issues, ecological consequences, energy conservation, safety and security, nightscape aesthetics and especially astronomy. In developing the programs, DSA Cornerstone Project found that to influence cultural change effectively — to make people literally look up and see the light — we must make children a main focus, use approaches that offer involvement on many levels, from cursory to committed, and offer involvement via many venues. We must make the programs and resources as turn-key as possible, especially for educators — and provide ways to visualize the problem with simple, easily grasped demonstrations. The programs spanned a wide range; from new media technology for the younger generation, to an event in the arts, to various types of educational materials, to the promotion of dark skies communities, to national and international events and to global citizen science programs. The DSA Cornerstone Project is continuing most all of these programs beyond IYA2009. The International Dark-Sky Association as well as the Starlight Initiative is endorsing and helping to continue with some of the most successful programs from the DSA. The GLOBE at Night campaign is adding a research component that examines light pollution’s affects on wildlife. Dark Skies Rangers activities are being implemented in Europe through the Galileo Teacher Training Program. The new “One Star at a Time” will engage people to protect the night sky through personal pledges and registration of public stargazing areas or StarParks, like the newest one in Italy. The Starlight Initiative’s World Night in Defence of the Starlight will take place on the Vernal Equinox. DSA will again oversee the Dark Skies portion of Global Astronomy Month, in which the International Dark Sky Week will be celebrated. DSA will be collaborating with Belgium’s “Night of Darkness” to endeavor to make that lights out event a more global event. DSA will endeavor to support dark skies education worldwide, as in Northern Ireland. DSA will seek to expand light pollution prevention campaigns like Austria’s. People whose homes meet the criteria of good lighting are invited to put a sticker from Austria’s biggest newspaper in their front window to show their support. DSA also seeks to collaborate with the IAU Office for Astronomy Development. The presentation will focus on the DSA programs during IYA and the sustainability of the DSA programs after IYA, as well as the expansion to other programs worldwide, with particular emphasis in communicating dark skies awareness with the public and its educational value in attracting young people to study science and technology. See www.darkskiesawareness.org for more information on the programs.

Walker, C. E.; Pompea, S. M.; Iya Dark Skies Awareness Working Group

2010-12-01

267

Society News: Monica Grady awarded CBE; Grubb Parsons Lecture 2012; Join the RAS; Astronomy on radio for kids; New Fellows; Peter D Hingley  

NASA Astrophysics Data System (ADS)

RAS Fellow Prof. Monica Grady has been made a Commander of the Most Excellent Order of the British Empire (CBE), in recognition of her services to space science. The RAS sponsors the annual Grubb Parsons Lecture, which this year took place on 6 June at the University of Durham. If you are a professional astronomer, geophysicist, or similar, a student studying these disciplines, or simply someone with a serious interest in them, we urge you to apply for membership of the RAS. Outreach is an important activity for the RAS. We recently supported an astronomy series called Deep Space High on the digital radio channel Fun Kids.

2012-08-01

268

Journal of Astronomical History and Heritage, 15(3), 255-257 (2012). IAU HISTORIC RADIO ASTRONOMY WORKING GROUP  

E-print Network

-significant radio telescopes and associated instrumentation found worldwide; b) document the technical for the full restoration of the radio telescope, which was started in June, 2012. The radio telescope of their visits to see the radio heliograph. The first telescope on Haleakala on Maui was Grote Rebers sea

Groppi, Christopher

2012-01-01

269

Monitoring Radio Frequency Interference in Southwest Virginia  

NASA Astrophysics Data System (ADS)

The radio signals received from astronomical objects are extremely weak. Because of this, radio sources are easily shrouded by interference from devices such as satellites and cell phone towers. Radio astronomy is very susceptible to this radio frequency interference (RFI). Possibly even worse than complete veiling, weaker interfering signals can contaminate the data collected by radio telescopes, possibly leading astronomers to mistaken interpretations. To help promote student awareness of the connection between radio astronomy and RFI, an inquiry-based science curriculum was developed to allow high school students to determine RFI levels in their communities. The Quiet Skies Project_the result of a collaboration between the National Aeronautics and Space Administration (NASA), the National Science Foundation (NSF), and the National Radio Astronomy Observatory (NRAO)_encourages students to collect and analyze RFI data and develop conclusions as a team. Because the project focuses on electromagnetic radiation, it is appropriate for physics, physical science, chemistry, or general science classes. My class-about 50 students from 15 southwest Virginia high schools-participated in the Quiet Skies Project and were pioneers in the use of the beta version of the Quiet Skies Detector (QSD), which is used to detect RFI. Students have been involved with the project since 2005 and have collected and shared data with NRAO. In analyzing the data they have noted some trends in RFI in Southwest Virginia.

Rapp, Steve

2010-01-01

270

Teaching and Learning Astronomy  

NASA Astrophysics Data System (ADS)

I review the teaching and learning of astronomy, in elementary and secondary school, colleges and universities, and for the public through astronomy outreach and communication. I describe International Year of Astronomy 2009, and some of the national and personal projects in which I am involved.

Percy, John R.

2010-10-01

271

The Life Story of a Star, Book 5. Guidebook. The University of Illinois Astronomy Project.  

ERIC Educational Resources Information Center

Presented is book five in a series of six books in the University of Illinois Astronomy Program which introduces astronomy to upper elementary and junior high school students. This guidebook discusses the interior of stars, their source of energy, and their evolution. Topics presented include: the physical properties of the sun; model of the solar…

Atkin, J. Myron; Wyatt, Stanley P., Jr.

272

The sky as a laboratory: an educational project of the Department of Astronomy of the University of Padova  

NASA Astrophysics Data System (ADS)

``The Sky as a Laboratory'' is an educational project of the Department of Astronomy of the University of Padova aimed to give students a physical approach to astronomy and astrophysics. It is a regional program designed to improve science education in the last two grades of high school, by creating cooperation between scientists and teachers. Currently it is present in 30 high schools around all provinces of the region of Veneto in the North-East of Italy. The close involvement in the didactical activities of high schools teachers is without any doubt the winning strategy of the project. Their enthusiastic participation to teaching and organising activities attracts each year the attention for sciences of an increasing number of students and suggests new ideas for future educational activities.

Ciroi, S.; Di Mille, F.; Rafanelli, P.

2011-06-01

273

Astronomy Communication  

NASA Astrophysics Data System (ADS)

Astronomers communicate all the time, with colleagues of course, but also with managers and administrators, with decision makers and takers, with social representatives, with the news media, and with the society at large. Education is naturally part of the process. Astronomy communication must take into account several specificities: the astronomy community is rather compact and well organized world-wide; astronomy has penetrated the general public remarkably well with an extensive network of associations and organizations of aficionados all over the world. Also, as a result of the huge amount of data accumulated and by necessity for their extensive international collaborations, astronomers have pioneered the development of distributed resources, electronic communications and networks coupled to advanced methodologies and technologies, often much before they become of common world-wide usage. This book is filling up a gap in the astronomy-related literature by providing a set of chapters not only of direct interest to astronomy communication, but also well beyond it. The experts contributing to this book have done their best to write in a way understandable to readers not necessarily hyperspecialized in astronomy nor in communication techniques while providing specific detailed information, as well as plenty of pointers and bibliographic elements. This book will be very useful for researchers, teachers, editors, publishers, librarians, computer scientists, sociologists of science, research planners and strategists, project managers, public-relations officers, plus those in charge of astronomy-related organizations, as well as for students aiming at a career in astronomy or related space science. Link: http://www.wkap.nl/prod/b/1-4020-1345-0

Heck, A.; Madsen, C.

2003-07-01

274

Astronomy LITE Demonstrations  

Microsoft Academic Search

Project LITE (Light Inquiry Through Experiments) is a materials, software, and curriculum development project. It focuses on light, optics, color and visual perception. According to two recent surveys of college astronomy faculty members, these are among the topics most often included in the large introductory astronomy courses. The project has aimed largely at the design and implementation of hands-on experiences

Kenneth Brecher

2006-01-01

275

NSF Internships in Public Science Education: Sensing the Radio Sky  

NASA Astrophysics Data System (ADS)

The intent of the "Sensing the Radio Sky" project is to teach high school students the concepts and relevance of radio astronomy through presentations in STARLAB portable planetariums. The two year project began in the summer of 2004. A total of twelve interns and four faculty mentors from Furman University and UNCA have participated at the Pisgah Astronomical Research Institute to develop the Radio Sky project. The project united physics and multimedia majors and allowed these students to apply their knowledge of different disciplines to a common goal. One component of the project is the development and production of a cylinder to be displayed in portable STARLAB planetariums. The cylinder gives a thorough view of the Milky Way and of several other celestial sources in radio wavelengths, yet these images are difficult to perceive without prior knowledge of radio astronomy. Consequently, the Radio Sky team created a multimedia presentation to accompany the cylinder. This multimedia component contains six informative lessons on radio astronomy assembled by the physics interns and numerous illustrations and animations created by the multimedia interns. The cylinder and multimedia components complement each other and provide a unique, thorough, and highly intelligible perspective on radio astronomy. The project is near completion and the final draft will be sent to Learning Technologies, Inc., for marketing to owners of STARLAB planetariums throughout the world. The development of the Radio Sky project has also provided a template for potential similar projects that examine our universe in different wavelengths, such as gamma ray, x-ray, and infrared. We acknowledge support from the NSF Internship in Public Science Education Program grant number 0324729.

Hund, L.; Boltuch, D.; Fultz, C.; Buck, S.; Smith, T.; Harris, R.; Moffett, D.; LaFratta, M.; Walsh, L.; Castelaz, M. W.

2005-12-01

276

Astronomy in the Russian Scientific-Educational Project: "KAZAN-GEONA-2010"  

NASA Astrophysics Data System (ADS)

The European Union promotes the Sixth Framework Programme. One of the goals of the EU Programme is opening national research and training programs. A special role in the history of the Kazan University was played by the great mathematician Nikolai Lobachevsky - the founder of non-Euclidean geometry (1826). Historically, the thousand-year old city of Kazan and the two-hundred-year old Kazan University carry out the role of the scientific, organizational, and cultural educational center of the Volga region. For the continued successful development of educational and scientific-educational activity of the Russian Federation, the Republic Tatarstan, Kazan was offered the national project: the International Center of the Sciences and Internet Technologies "GeoNa" (Geometry of Nature - GeoNa - is wisdom, enthusiasm, pride, grandeur). This is a modern complex of conference halls including the Center for Internet Technologies, a 3D Planetarium - development of the Moon, PhysicsLand, an active museum of natural sciences, an oceanarium, and a training complex "Spheres of Knowledge". Center GeoNa promotes the direct and effective channel of cooperation with scientific centers around the world. GeoNa will host conferences, congresses, fundamental scientific research sessions of the Moon and planets, and scientific-educational actions: presentation of the international scientific programs on lunar research and modern lunar databases. A more intense program of exchange between scientific centers and organizations for a better knowledge and planning of their astronomical curricula and the introduction of the teaching of astronomy are proposed. Center GeoNa will enable scientists and teachers of the Russian universities with advanced achievements in science and information technologies to join together to establish scientific communications with foreign colleagues in the sphere of the high technology and educational projects with world scientific centers.

Gusev, A.; Kitiashvili, I.

2006-08-01

277

African Astronomy and the Square Kilometre Array  

NASA Astrophysics Data System (ADS)

We highlight the growth of astronomy across Africa and the effect of hosting the Square Kilometer Array (SKA) will have on this growth. From the construction of a new 25m radio telescope in Nigeria, to new university astronomy programmes in Kenya, the HESS in Namibia and the Mauritian Radio Telescope, to the world class projects being developed in South Africa (Southern African Large Telescope and Karoo Array Telescope) astronomy is re-emerging across the continent. The SKA will represent the pinnacle of technological advancement in astronomy when constructed; requiring ultra high speed data transmission lines over 3000 km baselines and the World's fastest computer for correlation purposes. The investment alone to build the SKA on African soil will be of great economic benefit to its people, but the required network connectivity will significantly drive commercial expansion far beyond the initial value of the SKA investment. The most important consequence of hosting the SKA in Africa would be the impact on Human Capital Development (HCD) on the continent. Major HCD projects already underway producing excellent results will be presented. )

MacLeod, Gordon

2010-02-01

278

Enabling technologies and constraints for software sharing in large astronomy projects  

E-print Network

.M. Keck Observatory f National Optical Astronomy Observatories, La Serena, Chile ABSTRACT The new, infrastructure frameworks, applications, toolkits, etc.). We also examine observatory experiences and technology sharing, technology trends, infrastructure frameworks, control system 1. INTRODUCTION Software reuse has

Liske, Jochen

279

TOPS and Beyond: Training Master Teachers to Mentor Student Astronomy Projects Using the Faulkes Telescope-North  

NASA Astrophysics Data System (ADS)

2003 was the fifth and final year of the NSF-funded ``Towards Other Planetary Systems'' (TOPS) secondary school teacher training program conducted by the Institute for Astronomy in Hawai'i. While previous years concentrated on basic astronomy skills, cultural astronomy and astrobiology, TOPS 2003 focused on training master teachers and prior TOPS participants in the requisite skills to mentor student projects using the Faulkes Telescope-North (FTN), a 2-meter telescope under construction at the Haleakala High Altitude Observatory. The FTN and a twin in Australia will be the world's largest telescopes dedicated solely to education. This poster presentation describes the teacher's experiences with several prototype astrobiology projects suitable for a 2-meter-class telescope, including monitoring variable stars in star-forming regions, detecting extrasolar planet transits, and observing objects in the Kuiper Belt. Plans for partnering teachers with amateur astronomers proficient in observational techniques are also discussed; the American Association of Variable Star Observers (AAVSO) is a likely reservoir of such individuals. The recent selection of a University of Hawai'i group led by the TOPS Director as a NASA Astrobiology Institute Lead Team will provide a framework for development of teacher-student-amateur astronomer teams advised by professional astronomers and conducting astrobiology research. This work was supported by a grant from the National Science Foundation, ESI-9731083, and through University of Maryland and University of Hawaii subcontract Z667702, which was awarded under prime contract NASW-00004 from NASA.

Bedient, J.; Meech, K. J.; Kadooka, M. A.; Mattei, J. A.; Hamai, J.; Hemphill, R.; Hu, S.

2003-05-01

280

Summary Report on the Radio Farm Forum Pilot Project.  

ERIC Educational Resources Information Center

The main objective of the program was to obtain qualitative data on the value of Radio Farm Forums (RFF), to both the farmers and the extension service, in terms of facilitating two-way communication between the two parties. The concept of RFF is to provide agricultural information through integrated use of mass media and interpersonal…

Purnasiri, Supalak; Griffin, Robert S.

281

Information Content in Radio Waves: Student Investigations in Radio Science  

NASA Astrophysics Data System (ADS)

We describe an inquiry-based instructional unit on information content in radio waves, created in the summer of 2013 as part of a MIT Haystack Observatory (Westford, MA) NSF Research Experiences for Teachers (RET) program. This topic is current and highly relevant, addressing science and technical aspects from radio astronomy, geodesy, and atmospheric research areas as well as Next Generation Science Standards (NGSS). Projects and activities range from simple classroom demonstrations and group investigations, to long term research projects incorporating data acquisition from both student-built instrumentation as well as online databases. Each of the core lessons is applied to one of the primary research centers at Haystack through an inquiry project that builds on previously developed units through the MIT Haystack RET program. In radio astronomy, students investigate the application of a simple and inexpensive software defined radio chip (RTL-SDR) for use in systems implementing a small and very small radio telescope (SRT and VSRT). Both of these systems allow students to explore fundamental principles of radio waves and interferometry as applied to radio astronomy. In ionospheric research, students track solar storms from the initial coronal mass ejection (using Solar Dynamics Observatory images) to the resulting variability in total electron density concentrations using data from the community standard Madrigal distributed database system maintained by MIT Haystack. Finally, students get to explore very long-baseline interferometry as it is used in geodetic studies by measuring crustal plate displacements over time. Alignment to NextGen standards is provided for each lesson and activity with emphasis on HS-PS4 'Waves and Their Applications in Technologies for Information Transfer'.

Jacobs, K.; Scaduto, T.

2013-12-01

282

Multiwavelength Astronomy  

NSDL National Science Digital Library

This site from NASA's Infrared Astrophysics Data Center explains how the universe can be observed using the entire electromagnetic spectrum. There is an introduction to using light in astronomy; information on and images taken from different areas of the electromagnetic spectrum of objects in the solar system, the Milky Way galaxy and beyond; and a table of radiation types, their characteristic temperatures, and objects emitting this type of radiation. The tutorial explains how observations are made using X-rays, gamma rays, ultraviolet light, visible light, infrared wavelengths, and radio wavelengths. There is a section on why telescopes are sent to space and a multiwavelength gallery.

Linda Hermans-Killam

283

A Cryogenic Ultra-Low-Noise MMIC-based LNA with a discrete First Stage Transistor Suitable for Radio Astronomy Applications  

E-print Network

In this paper a new design of MMIC based LNA is outlined. This design uses a discrete 100-nm InP HEMT placed in front of an existing InP MMIC LNA to lower the overall noise temperature of the LNA. This new approach known as the Transistor in front of MMIC (T+MMIC) LNA, possesses a gain in excess of 40dB and an average noise temperature of 9.4K compared to 14.5K for the equivalent MMIC-only LNA measured across a 27-33GHz bandwidth at a physical temperature of 8K. A simple ADS model offering further insights into the operation of the LNA is also presented and a potential radio astronomy application is discussed

McCulloch, Mark A; Piccirillo, Lucio

2013-01-01

284

A Voyage through the Radio Universe  

ERIC Educational Resources Information Center

Each year, professionals and amateurs alike make significant contributions to the field of astronomy. High school students can also conduct astronomy research. Since 1992, the Radio Astronomy Research Team from Oil City Area Senior High School (OCHS) in Oil City, Pennsylvania, has traveled each year to the National Radio Astronomy Observatory…

Spuck, Timothy

2004-01-01

285

The U.S. Program for the International Year of Astronomy 2009 (IYA2009): Outcomes, Lessons Learned, and Legacy Projects (Invited)  

NASA Astrophysics Data System (ADS)

The United States conducted an active and wide-ranging program for IYA2009, thanks largely to support from the American Astronomical Society, the National Science Foundation, and NASA. The U.S. effort included leadership of several international “cornerstone” projects, including the Galileoscope telescope kit, the “From Earth to the Universe” image exhibition, Dark-Skies Awareness, and a variety of creative New Media activities, such as a daily podcast (“365 Days of Astronomy”) and a virtual island in Second Life. In addition, U.S. astronomy educators and outreach professionals played major roles in IYA2009 cornerstone projects designed to promote greater gender equity in astronomy (“She is An Astronomer”); to provide the best astronomy resources for formal education (the Galileo Teacher Training Program); and to conduct global weekend-long celebrations of astronomy involving star parties, several live Webcasts, and special events (“100 Hours of Astronomy” and “Galilean Nights”). NASA led special projects to provide large astronomy images to science centers across the nation, and sent comprehensive exhibits on the major themes of modern astronomy to dozens of libraries in small and medium-sized cities, based on competitive proposals for community impact (“Visions of the Universe”). Underpinning all of these efforts was a variety of methods for informing and engaging the large community of U.S. amateur astronomers, and active communication with our colleagues in Canada, Puerto Rico and Mexico. This talk will review the outcomes and major success stories from the year, discuss several lessons learned that could be useful for pending efforts such as the 2011 International Year of Chemistry, and provide a look ahead for IYA2009 projects and resources that are expected to continue to be active in 2010 and beyond.

Isbell, D.

2009-12-01

286

The Network for Astronomy in Education in Southwest New Mexico  

NASA Astrophysics Data System (ADS)

The Network for Astronomy in Education was organized to use astronomy as a motivational tool to teach science methods and principles in the public schools. NFO is a small private research observatory, associated with the local University, Western New Mexico. We started our program in 1996 with an IDEA grant by introducing local teachers to the Internet, funding a portable planetarium (Starlab) for the students, and upgrading our local radio linked computer network. Grant County is a rural mining and ranching county in Southwest New Mexico. It is ethnically diverse and has a large portion of the population below the poverty line. It's dryness and 6000' foot elevation, along with dark skies, suite it to the appreciation of astronomy. We now have 8 local schools involved in astronomy at some level. Our main programs are the Starlab and Project Astro, and we will soon install a Sidewalk Solar System in the center of Silver City.

Neely, B.

1998-12-01

287

Using Group Research to Stimulate Undergraduate Astronomy Major Learning  

NASA Astrophysics Data System (ADS)

The University of Arizona Astronomy Club has been working on two large group research projects since 2009. One research project is a transiting extrasolar project that is fully student led and run. We observed the transiting extrasolar planets, TrES-3b and TrES-4b, with the 1.55 meter Kuiper Telescope using different filters to test a proposed method of detecting extrasolar planet magnetic fields. The second project is a radio astronomy survey utilizing the Arizona Radio Observatory 12 meter telescope on Kitt Peak to study molecular gas in cold star-like cores identified by the Planck all sky survey. This project provides a unique opportunity for a large group of students to get hands-on experience observing with a world-class radio observatory. These projects involve students in every single step of the process including: proposal writing to obtain telescope time on various Southern Arizona telescopes, observing at these telescopes, data reduction and analysis, managing large data sets, and presenting results at scientific meetings and in journal publications. The primary goal of these projects is to involve students in cutting-edge research early on in their undergraduate studies. These projects are designed to be continuous long term projects so that new students can easily join. New students learn from the more experienced students on the projects, creating a learner-centered environment. Independent study credit is now an option for some students working on these projects.

McGraw, A. M.; Hardegree-Ullman, K. K.; Turner, J. D.; Shirley, Y. L.; Walker-LaFollette, A. M.; Robertson, A. N.; Carleton, T. M.; Smart, B. M.; Towner, A. P. M.; Wallace, S. C.; Smith, C.-T. W.; Austin, C. L.; Small, L. C.; Daugherty, M. J.; Guvenen, B. C.; Crawford, B. E.; Schlingman, W. M.

2013-04-01

288

Federal Communications Commission US311 Radio astronomy observations may be made in the bands 13501400 MHz and 49504990 MHz  

E-print Network

in the Police Radio Service (with a maximum authorized bandwidth of 20 kHz) for stolen vehicle recovery systems Service. Operations in this service are limited to Government Next Generation Weather Radar #12;

Bower, Geoffrey

289

The TACOR educational telescope and the Italian RemoteLab Project - Learning tools for the International Year of Astronomy 2009  

NASA Astrophysics Data System (ADS)

The Department of Physics of La Sapienza University has installed a didactic remote controlled telescope (TACOR) which, in collaboration with the Department of Physics of University Roma Tre, is currently used by mid-level and high-school classes. TACOR operates in the framework of the National RemoteLab Project which is supported by Italian Ministry of Public Education. During the forthcoming IYA2009, TACOR and RemoteLab will be powerful online tools for an interdisciplinary teaching and public communication of astronomy.

Altamore, A.; Nesci, R.; Rossi, C.; Sclavi, S.

2008-06-01

290

Astronomy Education Review  

NSDL National Science Digital Library

This is an online journal in Astronomy Education Research. This site attempts to offer teachers knowledge about how students learn, creative curriculum, and an archive of resources for teaching astronomy at all levels. The site offers researchers the opportunity to publish results, they can also share experiences and innovations, identify useful resources and reviews by other educators, communicate with other engaged in like projects, and participate in discussions of challenging issues. This is a fine repository for educators in astronomy.

291

MPS Internships in Public Science Education: Sensing the Radio Sky  

NASA Astrophysics Data System (ADS)

The intent of the “Sensing the Radio Sky” program is to teach high school students the concepts and relevance of radio astronomy through presentations in STARLAB portable planetariums. The two year program began in the summer of 2004 and was completed in December 2006. The program involved a team of 12 undergraduate physics and multimedia majors and four faculty mentors from Furman University, University of North Carolina-Asheville and Pisgah Astronomical Research Institute (PARI). One component of the program is the development and production of a projection cylinder for the portable STARLAB planetariums. The cylinder gives a thorough view of the Milky Way and of several other celestial sources in radio wavelengths, yet these images are difficult to perceive without prior knowledge of radio astronomy. Consequently, the Radio Sky team created a multimedia presentation to accompany the cylinder. This multimedia component contains six informative lessons on radio astronomy assembled by the physics interns and numerous illustrations and animations created by the multimedia interns. The cylinder and multimedia components complement each other and provide a unique, thorough, and highly intelligible perspective on radio astronomy. The final draft is complete and will be sent to Learning Technologies, Inc., for marketing to owners of STARLAB planetariums throughout the world. We acknowledge support from the NSF Internship in Public Science Education Program grant number 0324729.

Blake, Melvin; Castelaz, M. W.; Moffett, D.; Walsh, L.; LaFratta, M.

2006-12-01

292

Stereoscopic 3D Projections with MITAKA An Important Tool to Get People Interested in Astronomy and Space Science in Peru  

NASA Astrophysics Data System (ADS)

National Astronomical Observatory of Japan has developed space simulation software "Mitaka". By using Mitaka on two PCs and two projectors with polarizing filter, and look through polarized glasses, we can enjoy space travel in three dimensions. Any one can download Mitaka from anywhere in the world by Internet. But, it has been prepared only Japanese and English versions now. We improved a Mitaka Spanish version, and now we are making projections for local people. The experience of the universe in three dimensions is a very memorable for people, and it has become an opportunity to get interested in astronomy and space sciences. A 40 people capacity room, next o to our Planetarium, has been conditioned for 3D projections; also a portable system is available. Due to success of this new outreach system more 3D show rooms will be implemented within the country.

Shiomi, Nemoto; Shoichi, Itoh; Hidehiko, Agata; Mario, Zegarra; Jose, Ishitsuka; Edwin, Choque; Adita, Quispe; Tsunehiko, Kato

2014-02-01

293

The DNA Files: Report from Genome Radio Project, March--June 1995  

SciTech Connect

The Genome Radio Project (GRP) core staff are now all in place and the office infrastructure has been set up. The project logo, stationery, and letterhead have all been approved. The name of the series has been identified: The DNA Files. Weekly staff planning meetings and work plans have been initiated; the research component has been launched; interviews of potential production personnel are being conducted. The first three months of the GRP were principally devoted to the further development of the entire two-year project, specifically by pursuing full funding for this project from sources other than DOE. The principal purpose of this planning grant includes the following: produce a pilot documentary which can be used to strengthen the marketing strategy of the overall project; create concrete strategies for best engaging the talents and energies of the project`s advisors; and identify concrete collaborations that maximize the efficacy of a well-designed set of ancillary materials. During this period, GRP collaborated with the Exploratorium in San Francisco to record their series of evening lectures on the social implications of genetic research and its applications. Project staff also attended Lawrence Berkeley Lab.`s Genome Educators Workshops, and the Public Radio Conference.

NONE

1995-07-10

294

Working Papers: Astronomy and Astrophysics Panel Reports  

NASA Technical Reports Server (NTRS)

The papers of the panels appointed by the Astronomy and Astrophysics survey Committee are compiled. These papers were advisory to the survey committee and represent the opinions of the members of each panel in the context of their individual charges. The following subject areas are covered: radio astronomy, infrared astronomy, optical/IR from ground, UV-optical from space, interferometry, high energy from space, particle astrophysics, theory and laboratory astrophysics, solar astronomy, planetary astronomy, computing and data processing, policy opportunities, benefits to the nation from astronomy and astrophysics, status of the profession, and science opportunities.

Bahcall, John N.; Beichman, Charles A.; Canizares, Claude; Cronin, James; Heeschen, David; Houck, James; Hunten, Donald; Mckee, Christopher F.; Noyes, Robert; Ostriker, Jeremiah P.

1991-01-01

295

AMIGA Project. Radio Continuum and Nuclear Activity in a Complete Sample of Isolated Galaxies  

NASA Astrophysics Data System (ADS)

The aim of the AMIGA project (Analysis of the Interstellar Medium in Isolated GAlaxies) is building a reference sample of isolated galaxies to study the role of the environment in galactic evolution. AMIGA began in 2003 and nowadays involves more than 30 participants from 15 international institutions. Radio continuum emission in isolated spiral galaxies is coming from disk-dominated emission in spiral galaxies, in contrast to the results found in high-density environments where nuclear activity is more frequent. The radio continuum power is lower on average in our sample than in interacting galaxies or galaxies without an environment selection criterion. This confirms the relevance of our sample as a baseline to study the effects of the environment. Finally, we have studied the nuclear activity in isolated galaxies. We used different selection methods of isolated galaxies with active nucleus: (1) the far infrared colors give us a fraction of 7-20% of AGN candidates and (2) the rate of radio excess galaxies in the correlation of far infrared with radio continuum is less than 1%, which is the lowest rate found comparing with samples in other environments. This confirms the role of the environment as fundamental in the triggering of the radio nuclear activity.

Sabater, J.; Leon, S.; Verdes-Montenegro, L.; Lisenfeld, U.; Sulentic, J.; Verley, S.; Espada, D.; Ballu, A.; Bergond, G.; García, E.

296

Unmanned Aircraft Systems (UAS) Integration in the National Airspace System (NAS) Project - Gen-4 and Gen-5 Radio Plans  

NASA Technical Reports Server (NTRS)

NASA's UAS Integration in the NAS project, has partnered with Rockwell Collins to develop a concept Control and Non-Payload Communication (CNPC) system prototype radio, operating on recently allocated UAS frequency spectrum bands. This prototype radio is being used to validate initial proposed performance requirements for UAS control communications. This presentation will give an overview of the current plans for the prototype radio development.

Griner, James H.

2014-01-01

297

Gravitational Astronomy  

NASA Astrophysics Data System (ADS)

This chapter is about opening the gravitational window to observe the Universe. Although the weakest of all known forces, gravity plays a dominant role in forming stars and galaxies, shaping the large-scale structure, and driving the expansion of the Universe. Gravity has so far played a passive role in our understanding. We only witness its influence indirectly by observing its effect on star light (Doppler effect, cosmological redshift, gravitational lensing, etc.). However, we are at a momentous period that could soon transform our picture of the Universe by opening the gravitational window for observational astronomy. Gravitational waves have already been critical for understanding how neutron star binaries evolve [1] [2]. However, we have not directly observed the waves themselves. This will change before the end of this decade when several different methods of observing gravitational waves will reach sensitivity levels at which we should finally begin to unravel some of the deepest questions in astronomy, cosmology, and fundamental physics. The chapter by van den Broeck will deal with the two latter topics. In this chapter, we will discuss what gravitational waves are (Sect. 26.2), how they interact with matter (Sect. 26.3), on-going and future projects aimed at detecting cosmic gravitational waves (Sect. 26.4), expected and speculative astronomical sources, and a list of open problems on which gravitational astronomy could shed some light (Sect. 26.5).

Sathyaprakash, B. Suryanarayana

298

The Role of the Goldstone Apple Valley Radio Telescope Project in Promoting Scientific Efficacy among Middle and High School Students.  

ERIC Educational Resources Information Center

This study investigated the effects on student scientific efficacy after participation in the Goldstone Apple Valley Radio Telescope (GAVRT) project. In the GAVRT program, students use computers to record extremely faint radio waves collected by the telescope and analyze real data. Scientific efficacy is a type of self-knowledge a person uses to…

Ibe, Mary; Deutscher, Rebecca

299

Planetary astronomy  

NASA Technical Reports Server (NTRS)

The authors profile the field of astronomy, identify some of the key scientific questions that can be addressed during the decade of the 1990's, and recommend several facilities that are critically important for answering these questions. Scientific opportunities for the 1990' are discussed. Areas discussed include protoplanetary disks, an inventory of the solar system, primitive material in the solar system, the dynamics of planetary atmospheres, planetary rings and ring dynamics, the composition and structure of the atmospheres of giant planets, the volcanoes of IO, and the mineralogy of the Martian surface. Critical technology developments, proposed projects and facilities, and recommendations for research and facilities are discussed.

Morrison, David; Hunten, Donald; Ahearn, Michael F.; Belton, Michael J. S.; Black, David; Brown, Robert A.; Brown, Robert Hamilton; Cochran, Anita L.; Cruikshank, Dale P.; Depater, Imke

1991-01-01

300

Infrared astronomy  

NASA Technical Reports Server (NTRS)

The decade of 1990's presents an opportunity to address fundamental astrophysical issues through observations at IR wavelengths made possible by technological and scientific advances during the last decade. The major elements of recommended program are: the Space Infrared Telescope Facility (SIRTF), the Stratospheric Observatory For Infrared Astronomy (SOFIA) and the IR Optimized 8-m Telescope (IRO), a detector and instrumentation program, the SubMilliMeter Mission (SMMM), the 2 Microns All Sky Survey (2MASS), a sound infrastructure, and technology development programs. Also presented are: perspective, science opportunities, technical overview, project recommendations, future directions, and infrastructure.

Gillett, Frederick; Houck, James; Bally, John; Becklin, Eric; Brown, Robert Hamilton; Draine, Bruce; Frogel, Jay; Gatley, Ian; Gehrz, Robert; Hildebrand, Roger

1991-01-01

301

Undergraduate Research in the University of Arizona Astronomy Club  

NASA Astrophysics Data System (ADS)

Participation in research as an undergraduate is an invaluable learning experience that leads to successful post-undergrad studies. Because of this, the University of Arizona Astronomy Club strives to provide multiple opportunities for its members to get involved in research as early as possible. Areas of research covered by our projects include exoplanet research, stellar cycles, and radio observations. These projects cover exoplanet parameterization, the utilization of Kepler data, and various star-formation studies, respectively. Participation in our projects builds stronger data-collecting and reduction skills, while also leading to tangible achievements such poster presentations at AAS, ASP, and DPS, and published papers in astronomical journals.

Cates, Ian; Towner, A. P.; Walker-LaFollette, A.; Turner, J.; Hardegree-Ullman, K.; Pearson, K.

2014-01-01

302

Astronomy in Mozambique  

NASA Astrophysics Data System (ADS)

We present the state of Astronomy in Mozambique and how it has evolved since 2009 following the International Year of Astronomy. Activities have been lead by staff at University Eduardo Mondlane and several outreach activities have also flourished. In 2010 the University introduced its first astronomy module, Introduction to Astronomy and Astrophysics, for the second year students in the Department of Physics. The course has now produced the first students who will be graduating in late 2012 with some astronomy content. Some of these students will now be looking for further studies and those who have been keen in astronomy have been recommended to pursue this as a career. At the university level we have also discussed on the possibility to introduce a whole astronomy course by 2016 which falls well within the HCD that the university is now investing in. With the announcement that the SKA will be split between South Africa with its partner countries (including Mozambique), and Australia we have been working closely with the Ministry of Science and Technology to make astronomy a priority on its agenda. In this respect, an old telecommunications antenna is being converted by the South Africa SKA Project Office, and donated to Mozambique for educational purposes. It will be situated in Maluana, Mozambique.

Ribeiro, Valério A. R. M.; Paulo, Cláudio M.

2015-03-01

303

The FOSTER Project: Teacher Enrichment Through Participation in NASA's Airborne Astronomy Program  

NASA Technical Reports Server (NTRS)

NASA's airborne astronomy program offers a unique opportunity for K-12 science teacher enrichment and for NASA to reach out and serve the educational community. Learning from a combination of summer workshops, curriculum supplement materials, training in Internet skills and ultimately flying on NASA's C-141 airborne observatory, the teachers are able to share the excitement of scientific discovery with their students and convey that excitement from first hand experience rather than just from reading about science in a textbook. This year the program has expanded to include teachers from the eleven western states served by NASA Ames Research Center's Educational Programs Office as well as teachers from communities from around the country where the scientist who fly on the observatory reside. Through teacher workshops and inservice presentations, the FOSTER (Flight Opportunities for Science Teacher EnRichment) teachers are sharing the resources and experiences with many hundreds of other teachers. Ultimately, the students are learning first hand about the excitement of science, the scientific method in practice, the team work involved, the relevance of science to their daily lives and the importance of a firm foundation in math and science in today's technologically oriented world.

Koch, David; Hull, G.; Gillespie, C., Jr.; DeVore, E.; Witteborn, Fred C. (Technical Monitor)

1995-01-01

304

Radio frequency interference protection of communications between the Deep Space Network and deep space flight projects  

NASA Technical Reports Server (NTRS)

The increasing density of electrical and electronic circuits in Deep Space Station systems for computation, control, and numerous related functions has combined with the extension of system performance requirements calling for higher speed circuitry along with broader bandwidths. This has progressively increased the number of potential sources of radio frequency interference inside the stations. Also, the extension of spectrum usage both in power and frequency as well as the greater density of usage at all frequencies for national and international satellite communications, space research, Earth resource operations and defense, and particularly the huge expansion of airborne electronic warfare and electronic countermeasures operations in the Mojave area have greatly increased the potential number and severity of radio frequency interference incidents. The various facets of this problem and the efforts to eliminate or minimize the impact of interference on Deep Space Network support of deep space flight projects are described.

Johnston, D. W. H.

1981-01-01

305

Student Attitudes Towards Public Funding Of Astronomy  

NASA Astrophysics Data System (ADS)

Research in astronomy is strongly dependent on public (taxpayer) dollars. In this study we examine the attitudes of college students toward funding of astronomy projects. A survey was given to 269 college students prior to taking an introductory astronomy course. Students were given a short test designed to examine misconceptions about astronomy. They were then asked about their willingness to support public funding for astronomy projects. Students with fundamental misconceptions about mundane topics such as the cause of the seasons and phases of the moon were less than half as likely to support public funding of astronomy projects. Results are also reported showing the relationship between a willingness to fund projects and whether the students had experiences including reading books or magazines on astronomy, exposure to astronomy in high school, and using a telescope.

Stine, Peter

2009-01-01

306

Astronomy in the Marketplace  

NSDL National Science Digital Library

This is an activity about cultural references to astronomy. Learners will create a list of products that have been named after astronomical objects, which the class discusses. As a homework project, they can search local stores or media for additional astronomical references. This is Activity M-3 of Universe at Your Fingertips 2.0: A Collection of Activities and Resources for Teaching Astronomy DVD-ROM, which is available for purchase.

2013-04-30

307

Astronomy in Mexico  

NASA Astrophysics Data System (ADS)

Mexican astronomy has a long standing tradition of excellence in research. After a brief review of its history, I outline the current profile of the community, the available infrastructure and participating institutions, and give a glimpse into the future through current projects. The development of astronomy can serve as a powerful lever for science, technological development, education and outreach, as well as for improving the much needed link between basic research and industry development.

Lee, William H.

2013-01-01

308

Big Computing in Astronomy: Perspectives and Challenges  

NASA Astrophysics Data System (ADS)

Hardware progress in recent years has led to astronomical instruments gathering large volumes of data. In radio astronomy for instance, the current generation of antenna arrays produces data at Tbits per second, and forthcoming instruments will expand these rates much further. As instruments are increasingly becoming software-based, astronomers will get more exposed to computer science. This talk therefore outlines key challenges that arise at the intersection of computer science and astronomy and presents perspectives on how both communities can collaborate to overcome these challenges.Major problems are emerging due to increases in data rates that are much larger than in storage and transmission capacity, as well as humans being cognitively overwhelmed when attempting to opportunistically scan through Big Data. As a consequence, the generation of scientific insight will become more dependent on automation and algorithmic instrument control. Intelligent data reduction will have to be considered across the entire acquisition pipeline. In this context, the presentation will outline the enabling role of machine learning and parallel computing.BioVictor Pankratius is a computer scientist who joined MIT Haystack Observatory following his passion for astronomy. He is currently leading efforts to advance astronomy through cutting-edge computer science and parallel computing. Victor is also involved in projects such as ALMA Phasing to enhance the ALMA Observatory with Very-Long Baseline Interferometry capabilities, the Event Horizon Telescope, as well as in the Radio Array of Portable Interferometric Detectors (RAPID) to create an analysis environment using parallel computing in the cloud. He has an extensive track record of research in parallel multicore systems and software engineering, with contributions to auto-tuning, debugging, and empirical experiments studying programmers. Victor has worked with major industry partners such as Intel, Sun Labs, and Oracle. He holds a distinguished doctorate and a Habilitation degree in Computer Science from the University of Karlsruhe. Contact him at pankrat@mit.edu, victorpankratius.com, or Twitter @vpankratius.

Pankratius, Victor

2014-06-01

309

A new Main Injector radio frequency system for 2.3 MW Project X operations  

SciTech Connect

For Project X Fermilab Main Injector will be required to provide up to 2.3 MW to a neutrino production target at energies between 60 and 120 GeV. To accomplish the above power levels 3 times the current beam intensity will need to be accelerated. In addition the injection energy of Main Injector will need to be as low as 6 GeV. The current 30 year old Main Injector radio frequency system will not be able to provide the required power and a new system will be required. The specifications of the new system will be described.

Dey, J.; Kourbanis, I.; /Fermilab

2011-03-01

310

ASTRONOMY 1  

NSDL National Science Digital Library

Basic astronomy, focus on our solar system. You will start by taking a journey through our solar system by studying the planets. Click any link to blast off! planets for kids nine planets for kids astronomy nasa ...

dramsden

2012-03-26

311

Sustainable Astronomy  

Microsoft Academic Search

Through our International Year of Astronomy outreach effort, we established a sustainable astronomy program and curriculum in the Northfield, Minnesota community. Carleton College offers monthly open houses at Goodsell Observatory and donated its recently \\

C. Blaha; J. Goetz; T. Johnson

2011-01-01

312

Planetary Astronomy  

NASA Technical Reports Server (NTRS)

This 1-year project was an augmentation grant to my NASA Planetary Astronomy grant. With the awarded funding, we accomplished the following tasks: (1) Conducted two NVK imaging runs in conjunction with the ILAW (International Lunar Atmosphere Week) Observing Campaigns in 1995 and 1997. In the first run, we obtained repeated imaging sequences of lunar Na D-line emission to better quantify the temporal variations detected in earlier runs. In the second run we obtained extremely high resolution (R=960.000) Na line profiles using the 4m AAT in Australia. These data are being analyzed under our new 3-year Planetary Astronomy grant. (2) Reduced, analyzed, and published our March 1995 spectroscopic dataset to detect (or set stringent upper limits on) Rb. Cs, Mg. Al. Fe, Ba, Ba. OH, and several other species. These results were reported in a talk at the LPSC and in two papers: (1) A Spectroscopic Survey of Metallic Abundances in the Lunar Atmosphere. and (2) A Search for Magnesium in the Lunar Atmosphere. Both reprints are attached. Wrote up an extensive, invited Reviews of Geophysics review article on advances in the study of the lunar atmosphere. This 70-page article, which is expected to appear in print in 1999, is also attached.

Stern, S. Alan

1998-01-01

313

Seattle Area High School Astronomy Projects: 4 local teachers present their work with students.  

NASA Astrophysics Data System (ADS)

4 Seattle area high school teachers will present work with students as part of the opening session of High School Teacher Day. Vince San Pietro of Shorecrest HS will discuss a project involving teachers and students in characterizing RR Lyrae candidate stars using the University of Washington’s Manastash Ridge Observatory. Rebecca Fowler of Skyline HS will present her work with student teams in the Team America rocketry contest. Phil Cooper, also of Skyline, will talk about a telescope making project. And Eric Muhs of Roosevelt HS, will show a student-built, free-floating, self-orienting robot that flew aboard NASA’s zero gravity airplane last May.

Muhs, Eric C.

2006-12-01

314

Astronomy Communication  

Microsoft Academic Search

Astronomers communicate all the time, with colleagues of course, but also with managers and administrators, with decision makers and takers, with social representatives, with the news media, and with the society at large. Education is naturally part of the process. Astronomy communication must take into account several specificities: the astronomy community is rather compact and well organized world-wide; astronomy has

A. Heck; C. Madsen

2003-01-01

315

Infrared Astronomy in the Past Half Century  

NASA Astrophysics Data System (ADS)

Infrared astronomy has greatly changed in the past four decades. From a small extension to optical astronomy that stretched out to slightly longer wavelengths, infrared astronomy gradually reached out to cover the entire wavelength range to the radio regime, and established itself as a field of importance in its own right. These efforts required the development of new detection techniques that permitted access to ever larger portions of the near-,mid and far-infrared regime and extended out into the submillimeter domain. Infrared and submillimeter techniques became essential for the investigations of star formation processes that took place at such low temperatures that no optical emission could be expected. The new observations pierced the dark dust clouds populating the Milky Way to provide a clear view of the Galaxy's center. In the distant Universe startlingly luminous merging galaxies came into view. We were beginning to look far back in time to perceive the gradual evolution of galaxies over the aeons. A serious drawback, however, persisted. At progressively longer wavelengths the view of the Universe became increasingly blurred. Ordinary telescopes no longer provided sharp views. Interferometers would have to be pioneered and constructed at great cost. Major investments led to the construction of dedicated facilities, on the ground, in the air and in space. The increased funding, however, also dictated that infrared astronomers reorganize themselves.Initially started by a few individuals working with their students and a few technicians, infrared astronomy had to change as increasing numbers of scientists entered the field and began to erect facilities that required the dedicated efforts of hundreds of astronomers on a single project. Infrared astronomy has evolved into Big Science, a limit at which increasing budgets threaten to become an unacceptable burden on society. Members of our discipline will need to think carefully how we may continue to pursue further advances within socially affordable limits.

Harwit, M.

316

Izera projects. With astronomy into a forest. T.Mrozek, S. Kolomaoski, P. Suchan,  

E-print Network

Izera Projects: overview Primary goals: -scaled model of the Solar System -gnomon and sundial ­ tourist, 2010 #12;Gnomon and sundial the Gnomon: stone pillar (2 - 2.5 m) ­ from Strzegom quarry #12;Gnomon and sundial Mounted: May 9th, 2009 the Sundial: due to the orientation of the building two sundials were

Mrozek, Tomasz

317

Eric Weisstein's World of Astronomy  

NSDL National Science Digital Library

This working project by Eric W. Weisstein of Wolfram Research, Inc., this site is a budding encyclopedia of astronomy, with entries submitted by experts in the field. The site is subdivided into seven different categories consisting of: atmospheres, calendars, galactic astronomy, observational astronomy, remote sensing, solar system and stars. Currently the page features 588 entires, 2,892 cross-references and 18 different figures and counting. The page also features links to additional resources in chemistry, mathematics and physics.

Weisstein, Eric W.

318

The Morehead State University 18 Meter Radio Telescope Project: Involving Undergraduates in Observational Astrophysics  

NASA Astrophysics Data System (ADS)

The Space Science Center at Morehead State University is in the process of developing a large aperture (18-21 meter) cm-wave radio telescope, the Morehead Radio Telescope (MRT). The telescope will be located in the mountainous region of Eastern Kentucky. The instrument will serve as a research instrument and active laboratory for undergraduate astronomy, physics, pre-engineering, and computer science students. The antenna system will be engaged in science programs (in astrophysics) and in satellite mission support services (telemetry, tracking, and control). The benefits to students are based upon a hands-on approach to learning concepts in astrophysics and engineering. Additionally, there are still research contributions that small aperture centimeter-wave instruments can make including long-term observations of microvariability in AGNs, observations of transient events, and surveys. The MRT will operate three receiver systems including an L-band receiver (1.4-1.7 GHz) covering the "water hole", an S-band receiver (2.2-2.4 GHz) and a Ku-band receiver (11.2- 12.7 GHz) for continuum observations and satellite telemetry. The technical specifications for the instrument have been developed and an RFP has been issued inviting antenna vendors to submit proposals. The reflector will have a surface accuracy of 0.020 inches RMS over the entire surface, which will support relatively high frequency (Ku-band) observations. The antenna system will be full-motion and have a slew speed of 2 deg per second and an acceleration of 2 deg per second2. The HI and OH spatial distribution associated with cosmic phenomena will be investigated as well as dynamics and kinematics (particularly in HI) by observing over a range of frequencies (up to 2.5 MHz) with a 2048-channel back-end spectrometer, providing up to 1 KHz frequency resolution. The sensitivity and versatility of the telescope design will facilitate investigation of a wide variety of cosmic phenomena. The MRT is funded by assistance from the National Science Foundation, NASA, and the SBA.

Malphrus, B. K.; Combs, M. S.; Kruth, J.

2002-12-01

319

The Project SSG-S: a Rapid Document Delivery Service for Astronomy, Astrophysics and Space Research  

NASA Astrophysics Data System (ADS)

For nearly fifty years the Deutsche Forschungsgemeinschaft (DFG) has given considerable financial support to a series of German libraries for the acquisition of research literature in various areas. Particular emphasis was put on the acquisition of special research literature in addition to the standard material as found in many collections. The project SSG-S aims at making these collected resources as comprehensively and easily as possible available to institutions of higher education, research and private enterprise alike. This does not only include a rapid document delivery service, but also aims at recording and making accessible all relevant material including electronic documents.

Sens, Irina

320

IAC-02-IAA.2.3.01 Dishing up the Data: the role of Australian space tracking and radio astronomy facilities in the  

E-print Network

.Sarkissian@csiro.au Abstract The recent Australian film, The Dish, highlighted the role played by the Parkes Radio Telescope's major radio telescope facilities was being established at Parkes, in western New South Wales. This 64 Radio Telescope has been contracted by NASA on many occasions to support interplanetary spacecraft

Sarkissian, John M.

321

Reports of planetary astronomy, 1991  

NASA Technical Reports Server (NTRS)

A collection is presented of summaries designed to provide information about scientific research projects conducted in the Planetary Astronomy Program in 1990 and 1991, and to facilitate communication and coordination among concerned scientists and interested persons in universities, government, and industry. Highlights of recent accomplishments in planetary astronomy are included.

1991-01-01

322

Organizations and Strategies in Astronomy  

NASA Astrophysics Data System (ADS)

This book offers a unique collection -- the first of its kind -- of chapters dealing with socio-dynamical aspects of the astronomy (and related space sciences) community: characteristics of organizations, publication studies, research indicators, space science planning, research communication, public outreach, and so on. The experts contributing to this book have done their best to write in a way understandable by readers not necessarily hyper-specialized in astronomy, while still providing specific detailed information. The book concludes with an extensive bibliography of publications related to socio-astronomy and to the interactions of the astronomy community with society at large. This book will be most usefully read by researchers, teachers, editors, publishers, librarians, science sociologists, research planners and strategists, project managers, and public relations officers, plus those in charge of astronomy-related organizations, as well as by students aiming at a career in astronomy or related space science. Link: http://www.wkap.nl/book.htm/0-7923-6671-9

Heck, André

2000-11-01

323

NEW THz SOLAR RADIO ASTRONOMY  

Microsoft Academic Search

New striking aspects of solar activity have been found from observations at frequencies above 100 GHz, provided by the solar submillimeter-wave telescope (SST) at El Leoncito in the Argentina Andes. The SST utilizes a radome-enclosed 1.5-m Cassegrain reflector, operating simultaneously with four 212 GHz and two 405 GHz total power radiometers with 5ms time resolution. Partial overlapping of antenna beams

Pierre Kaufmann; Jean-Pierre Raulin; C. Guillermo; Gimenez de Castro; Hugo Levato; Adolfo Marun; Pablo Pereyra

324

Bad Astronomy  

NSDL National Science Digital Library

Philip Plait, a professor at the physics and astronomy department at Sonoma State University, explores many popular myths and misconceptions about astronomy at this amusing and educational website. Students and educators can learn which ideas promoted by television, news, movies, and the general public are false and, more importantly, why they are false. Amateur astronomers can talk with others about an array of bad astronomy topics on the Bulletin Board. The website offers information about Philip Plait's public talks and about astronomical events.

Plait, Philip

325

The Jailbreak Health Project--incorporating a unique radio programme for prisoners.  

PubMed

Several studies in NSW have identified prisoners to be at high risk for blood borne viruses. The prevalence of hepatitis C among men in NSW correctional centres is 40% and over 60% among women. It is even higher among those with histories of injecting drug use. As part of the state's strategy to minimise the spread of blood borne viruses and promote healthy lifestyles among prisoners, the Community Restorative Centre broadcasts a weekly half hour radio programme to prisoners and the community. The project is funded through the NSW Health Department and aims to provide support to prisoners, ex-prisoners and their families. Jailbreak's success hinges on the participation of the very people [prisoners] the show wishes to target. The radio show is aimed specifically at broadcasting health promotion and harm-minimisation messages to prisoners and their supporters although this is not obvious. When you tune in to Jailbreak you will hear a diverse range of opinion, music and poetry from people caught up in the criminal justice system. Nevertheless at the heart of this exciting and challenging project is the delivery of engaging, relevant and clear health messages to prison inmates, ex-inmates and families in relation to HIV, hepatitis and sexual health. Since 2002, valuable health information, often in the form of personal stories, vignettes and quiz questions, can be heard in and around Sydney on 2SER 107.3 FM or online at http://www.2ser.com. Jailbreak has not been without controversy and has to balance the security focus of correctional authorities and the illegality of substance use in correctional centres with the need to convey messages to prisoners in relation to harm-minimisation. PMID:17854735

Minc, Ariane; Butler, Tony; Gahan, Gary

2007-10-01

326

Status of the Stratospheric Observatory for Infrared Astronomy (SOFIA)  

E-print Network

Status of the Stratospheric Observatory for Infrared Astronomy (SOFIA) R.D. Gehrz a, , E.E. Becklin The Stratospheric Observatory for Infrared Astronomy (SOFIA), a joint US/German project, is a 2.5-m infrared by Elsevier Ltd. All rights reserved. Keywords: Infrared Astronomy; Sub-millimeter astronomy; Airborne

De Buizer, James Michael

327

Fabrication of Optical Fiber Mechanical Shock Sensors for the Los Alamos HERT (High Explosive Radio Telemetry) Project  

SciTech Connect

This document lists the requirements for the fiber optic mechanical shock sensor for the Los Alamos HERT (High Explosive Radio Telemetry) project and provides detailed process steps for fabricating, testing, and assembling the fiber shock sensors for delivery to Los Alamos.

P. E. Klingsporn

2005-11-14

328

Astronomy Development in Nigeria: Challenges and Advances  

NASA Astrophysics Data System (ADS)

Nigeria evidently has huge potentials to develop a strong astronomy community. Much of the strength lies in the great number of intelligent students with the potential of becoming good astronomers. Sadly, astronomy development in Nigeria has stagnated in the past decades owing to poor funding and/or indifferent attitude of the funding bodies, research-unfriendly environment, and non-existence of facilities. Currently, efforts toward fuelling advancement in astronomy are focused on building 'critical mass', establishing collaborations with universities/astronomy institutes outside Nigeria, converting out-of-use communication antennas into radio telescopes, and acquiring out-of-use telescopes for educational and low-level research purposes.

Okwe Chibueze, James

2015-01-01

329

Astronomy Program for Young Children.  

ERIC Educational Resources Information Center

An account of a teacher's experience in presenting astronomy to 12 to 15 year olds in a summer science program is presented. Observations of planets, meteors, and the sun are the major projects which are discussed. (SA)

Levy, David H.

1979-01-01

330

Modulate Internet Radio Into FM Using GNU Radio  

E-print Network

1 Modulate Internet Radio Into FM Using GNU Radio By: Elie Salameh Outline. · Fm in gnu radio · Audio Streams in Internet Radio · Gnu & Audio Files · Sox command · Playlist ".pls" · Recording internet radio #12;2 Project description · Using gnu radio to modulate internet radio into fm. · Using usrp

Yu, Chansu

331

Astronomy Week in Madeira, Portugal  

NASA Astrophysics Data System (ADS)

The outreach programme Semanas da Astronomia (Astronomy Weeks) is held in late spring or summer on the island of Madeira, Portugal. This programme has been attracting enough interest to be mentioned in the regional press/TV/radio every year and is now, without doubt, the astronomical highlight of the year on Madeira. We believe that this programme is a good case study for showing how to attract the general public to astronomy in a small (population 250 000, area 900 km2) and fairly isolated place such as Madeira. Our Astronomy Weeks have been different each year and have so far included exhibitions, courses, talks, a forum, documentaries, observing sessions (some with blackouts), music and an astro party. These efforts may contribute towards putting Madeira on the map with respect to observational astronomy, and have also contributed to the planned installation of two observatories in the island.

Augusto, P.; Sobrinho, J. L.

2012-05-01

332

Primary Astronomy.  

ERIC Educational Resources Information Center

Selected materials needed to teach an astronomy unit as well as suggested procedures, activities, ideas, and astronomy fact sheets published by the Manitoba Planetarium are provided. Subjects of the fact sheets include: publications and classroom picture sets available from the National Aeronautics and Space Administration and facts and statistics…

Greenstone, Sid; Smith, Murray

333

Intermediate Astronomy.  

ERIC Educational Resources Information Center

Selected materials needed to teach an astronomy unit as well as suggested procedures, activities, ideas, and astronomy fact sheets published by the Manitoba Planetarium are provided. Subjects of the fact sheets include: publications and classroom picture sets available from the National Aeronautics and Space Administration and facts and statistics…

Greenstone, Sid; Smith, Murray

334

Radio Surveys: an Overview  

NASA Astrophysics Data System (ADS)

Radio astronomy has provided important surveys that have made possible key (and sometimes serendipitous) discoveries. I will briefly mention some of the past continuum and line (HI) radio surveys as well as new, on-going surveys and surveys planned for the near future. This new generation of large radio surveys is bringing extra challenges in terms of data handling but also great new possibilities thanks to the wider range of data products that they will provide.

Morganti, Raffaella

2015-03-01

335

National Radio Observatory  

NSDL National Science Digital Library

The National Radio Astronomy Observatory (NRAO) "operates powerful, advanced radio telescopes spanning the western hemisphere." The website is nicely divided into information for the general public, astronomers, and teachers and students. Users can learn all about NRAO's many telescopes located throughout the United States. Researchers can find out about meetings, conferences, software resources, and surveys. Amateur radio astronomers can find links describing how to build antennas and interferometers. Everyone will enjoy the numerous images of astronomical phenomena and NRAO's telescopes and facilities.

336

Astronomy: Project Earth Science.  

ERIC Educational Resources Information Center

This book presents classroom activities and reading materials. The activities use a hands-on approach and address the standards. Each features both a student section and a teacher guide. Eleven activities include: (1) "It's Only a Paper Moon"; (2) "Time Traveler"; (3) "Solar System Scale"; (4) "Hello Out There!"; (5) "How Far to the Star?"; (6)…

Smith, P. Sean

337

The Astronomy Center  

NSDL National Science Digital Library

This rather fine website is a must-visit for anyone involved in teaching college-level astronomy. The Astronomy Center is sponsored by the American Astronomical Society, the American Association of Physics Teachers, and the National Science Foundation, among other distinguished organizations. Visitors can get started by looking over the Recent Additions area, which in the past has included features on the phases of the moon, interactive activities related to fossil stars, and a telescope primer for educators. Moving on, visitors can use the Browse By Topic area to find specific materials on 13 subjects, including galaxies, the solar system, and the Milky Way. Also, visitors can browse by document type, where the headings include Simulations, Projects, and Labs. The Cosmic Time and Distance area is a real delight, as it includes activities that will challenge students to explore the concepts of parallax and aberration of light as they apply to astronomy.

2012-06-08

338

NASE Training Courses in Astronomy for Teachers throughout the World  

ERIC Educational Resources Information Center

Network for Astronomy School Education, NASE, is a project that is organizing courses for teachers throughout the entire world. The main objective of the project is to prepare secondary and primary school teachers in astronomy. Students love to know more about astronomy and teachers have the opportunity to observe the sky that every school has…

Ros, Rosa M.

2012-01-01

339

ESO's Astronomy Education Programme  

NASA Astrophysics Data System (ADS)

ESO, the European Organisation for Astronomical Research in the Southern Hemisphere, has operated a programme of astronomy education for some years, with a dedicated Educational Office established in 2001. We organise a range of activities, which we will highlight and discuss in this presentation. Many are run in collaboration with the European Association for Astronomy Education (EAAE), such as the "Catch a Star!" competition for schools, now in its fourth year. A new endeavour is the ALMA Interdisciplinary Teaching Project (ITP). In conjunction with the EAAE, we are creating a set of interdisciplinary teaching materials based around the Atacama Large Millimeter Array project. The unprecedented astronomical observations planned with ALMA, as well as the uniqueness of its site high in the Atacama Desert, offer excellent opportunities for interdisciplinary teaching that also encompass physics, engineering, earth sciences, life sciences, and culture. Another ongoing project in which ESO takes part is the "Science on Stage" European science education festival, organised by the EIROforum - the group of seven major European Intergovernmental Research Organisations, of which ESO is a member. This is part of the European Science Teaching Initiative, along with Science in School, a newly-launched European journal for science educators. Overviews of these projects will be given, including results and lessons learnt. We will also discuss possibilities for a future European Astronomy Day project, as a new initiative for European-wide public education.

Pierce-Price, D. P. I.; Boffin, H.; Madsen, C.

2006-08-01

340

Astronomy Camp = IYA x 22: 22 Years of International Astronomy Education  

NASA Astrophysics Data System (ADS)

Do you remember childhood dreams of being an astronomer, or the ravenous desire for ever larger glass and better equipment as an amateur astronomer? What if your child or the person down the street could live that dream for a weekend or a week? The University of Arizona Astronomy Camp continues to substantiate those dreams after more than two decades in existence. Astronomy Camp is an immersion hands-on field experience in astronomy, ranging from two to eight nights, occurring a few times per year. Participants span an age range from elementary students to octogenarians. The three basic offerings include adult camps, a beginning Camp for teenagers, and an advanced teen Camp. Several variants of the basic Camp model have evolved, including an ongoing decade long series of specialized Camps for Girl Scout leaders from across the country, funded by the NIRCam instrument development program for the James Webb Space Telescope. The advanced teen Camp is a microcosm of the entire research arc: the participants propose projects, spend the week collecting and analyzing data using research grade CCDs, infrared arrays, and radio/sub-millimeter telescopes, and finish with a presentation of the results. This past summer the Camps moved to Kitt Peak National Observatory for the first time, providing access to a vast and diverse collection of research instruments, including the 0.9-meter WIYN and 2.3-meter Bok telescopes, the McMath-Pierce Solar Telescope, and the 12-meter ARO radio telescope. Education research into the Camp's impact indicates that reasons for its appeal to youth include a learner-centered and personal approach with a fun attitude toward learning, authentic scientific inquiry led by mentors who are real scientists, a peer group with common interests in science and engineering, and the emotional appeal of spending time on a dark "sky island" devoted to the exploration of nature.

Hooper, Eric Jon; McCarthy, D. W.; Camp Staff, Astronomy

2010-01-01

341

The Radio Communication Project in Nepal: A Culture-Centered Approach to Participation  

ERIC Educational Resources Information Center

Considerable research has been conducted on the topic of entertainment-education (EE), the method of using entertainment platforms such as popular music, radio, and television programming to diffuse information, attitudes, and behaviors via role modeling. A significant portion of the recently published EE literature has used the case of the Radio

Dutta, Mohan Jyoti; Basnyat, Iccha

2008-01-01

342

Islamic AstronomyIslamic Astronomy Topics covered  

E-print Network

Islamic AstronomyIslamic Astronomy #12;Topics covered ·· Islamic calendarIslamic calendar ·· types importance in the structure ofof kaabakaaba ·· problems in Islamic astronomyproblems in Islamic astronomy ·· solutions to problems by astronomerssolutions to problems by astronomers ·· Observatories in Islamic

Aslaksen, Helmer

343

100 Hours of Astronomy  

NASA Astrophysics Data System (ADS)

The 100 Hours of Astronomy cornerstone project (100HA) is a round-the-clock, worldwide event with 100 continuous hours of a wide range of public outreach activities including live webcasts, observing events and more. One of the key goals of 100HA is to have as many people as possible look through a telescope as Galileo did for the first time 400 years ago. 100HA will take place from 2-5 April when the Moon goes from first quarter to gibbous, good phases for early evening observing. Saturn will be the other highlight of early evening observing events. 100 Hours of Astronomy consists of five main events: 1. An opening event featuring the telescope that Galileo used to make his groundbreaking observations. 2. Activities at science centres, planetariums and science museums including live webcasts, live observations by visitors using remotely-operated telescopes, and enhanced outreach programs including public observing sessions held by amateur astronomy groups. 3. Observing sessions and other educational activities in schools groups held by astronomy clubs and others. 4. 24 hours of live webcasts from research observatories around the world, along with observing events and other outreach activities at participating observatories. 5. 24 hours of sidewalk astronomy - public observing sessions in population centres to bring the opportunity to view the Moon, Saturn and other objects to as many people as possible. The annual International Sidewalk Astronomy Night will be held during this event. These primary activities will be scheduled so that each supports the other, leading in order from one to the next and culminating in the world's greatest public observing event. A wrap-up will be held at the IAU General Assembly in 2009 to recognize all participants’ contributions to this unique global event.

Simmons, Mike

2009-01-01

344

Radio Science, Volume ???, Number , Pages 15, Radio Frequency Interference Mitigation for Detection  

E-print Network

Radio Science, Volume ???, Number , Pages 1­5, Radio Frequency Interference Mitigation for Detection of Extended Sources with an Interferometer Geoffrey C. Bower Radio Astronomy Laboratory, UC Berkeley, Berkeley, CA 94720, USA Radio frequency interference (RFI) is a significant problem for current

Ellingson, Steven W.

345

Minoan Astronomy  

NASA Astrophysics Data System (ADS)

Of the three great cultures of the ancient eastern Mediterranean — the Babylonian, Egyptian, and Minoan — we have considerable knowledge of the astronomy of the first two through their documents (see relevant sections of this Handbook). Very little written material, however, has survived from Minoan Crete, but the evidence of other impressive archaeological discoveries implies that the inhabitants were on a par with their neighbors and had made similar advances in astronomy. In lieu of written sources, we have used the methods of archaeoastronomy to recover as much as possible about Minoan astronomy. In short, these are measuring the orientations of walls and their opposite horizons at a representative selection of monuments, analyzing the measurements statistically, and comparing the results with digital reconstruction of the positions of significant celestial bodies for the time when the walls were built.

Blomberg, Mary; Henriksson, Göran

346

Artificial Intelligence in Astronomy  

NASA Astrophysics Data System (ADS)

From the perspective (and bias) as Eclipsing Binary researchers, we give a brief overview of the development of Artificial Intelligence (AI) applications, describe major application areas of AI in astronomy, and illustrate the power of an AI approach in an application developed under the EBAI (Eclipsing Binaries via Artificial Intelligence) project, which employs Artificial Neural Network technology for estimating light curve solution parameters of eclipsing binary systems.

Devinney, E. J.; Prša, A.; Guinan, E. F.; Degeorge, M.

2010-12-01

347

Astronomy Video Contest  

NASA Astrophysics Data System (ADS)

One of Galileo's staunchest supporters during his lifetime was Johannes Kepler, Imperial Mathematician to the Holy Roman Emperor. Johannes Kepler will be in St. Louis to personally offer a tribute to Galileo. Set Galileo's astronomy discoveries to music and you get the newest song by the well known acappella group, THE CHROMATICS. The song, entitled "Shoulders of Giants” was written specifically for IYA-2009 and will be debuted at this conference. The song will also be used as a base to create a music video by synchronizing a person's own images to the song's lyrics and tempo. Thousands of people already do this for fun and post their videos on YOU TUBE and other sites. The ASTRONOMY VIDEO CONTEST will be launched as a vehicle to excite, enthuse and educate people about astronomy and science. It will be an annual event administered by the Johannes Kepler Project and will continue to foster the goals of IYA-2009 for years to come. The Astronomy Video poster will contain all the basic information about the contest including: categories, rules, prizes, web address for more info and how to download the new song, "Shoulders of Giants.”

McFarland, John

2008-05-01

348

Astronomy Video Contest  

NASA Astrophysics Data System (ADS)

During Galileo's lifetime his staunchest supporter was Johannes Kepler, Imperial Mathematician to the Holy Roman Emperor. Johannes Kepler will be in St. Louis to personally offer a tribute to Galileo. Set Galileo's astronomy discoveries to music and you get the newest song by the well known acappella group, THE CHROMATICS. The song, entitled "Shoulders of Giants” was written specifically for IYA-2009 and will be debuted at this conference. The song will also be used as a base to create a music video by synchronizing a person's own images to the song's lyrics and tempo. Thousands of people already do this for fun and post their videos on YOU TUBE and other sites. The ASTRONOMY VIDEO CONTEST will be launched as a vehicle to excite, enthuse and educate people about astronomy and science. It will be an annual event administered by the Johannes Kepler Project and will continue to foster the goals of IYA-2009 for years to come. During this presentation the basic categories, rules, and prizes for the Astronomy Video Contest will be covered and finally the new song "Shoulders of Giants” by THE CHROMATICS will be unveiled

McFarland, John

2008-05-01

349

Reports of planetary astronomy - 1991  

NASA Technical Reports Server (NTRS)

This publication provides information about currently funded scientific research projects conducted in the Planetary Astronomy Program during 1991, and consists of two main sections. The first section gives a summary of research objectives, past accomplishments, and projected future investigations, as submitted by each principal investigator. In the second section, recent scientifically significant accomplishments within the Program are highlighted.

Rahe, Jurgen (editor)

1993-01-01

350

Community Participation, Cultural Discourse, and Health Education Projects in Developing Areas: The Case of the Radio Communication Project in Nepal  

ERIC Educational Resources Information Center

In this article, the author comments on the article by Dutta and Basnyat (see EJ802883) that provides an insightful and comprehensive critique of a United States Agency for International Development (USAID) entertainment-education program, The Radio Communication Program (RCP) in Nepal, which has been reported to be highly participatory. Despite…

Linn, J. Gary

2008-01-01

351

On gamma-ray astronomy  

Microsoft Academic Search

Summary  Photons in the visible range form the basis of astronomy. They move in straight lines, which preserves source information,\\u000a but they arise only very indirectly from nuclear or high-energy processes. Cosmic-ray particles, on the other hand, arise\\u000a directly from high-energy processes in astronomical objects of various classes, but carry no information about source direction.\\u000a Radio emissions are still more complex

P. Morrison

1958-01-01

352

Introducing Astronomy Related Research into Non-Astronomy Courses  

NASA Astrophysics Data System (ADS)

The concern over the insufficient number of students choosing to enter the science and engineering fields has been discussed and documented for years. While historically addressed at the national level, many states are now recognizing that the lack of a highly-skilled technical workforce within their states' borders has a significant effect on their economic health. Astronomy, as a science field, is no exception. Articles appear periodically in the most popular astronomy magazines asking the question, "Where are the young astronomers?" Astronomy courses at the community college level are normally restricted to introductory astronomy I and II level classes that introduce the student to the basics of the night sky and astronomy. The vast majority of these courses is geared toward the non-science major and is considered by many students to be easy and watered down courses in comparison to typical physics and related science courses. A majority of students who enroll in these classes are not considering majors in science or astronomy since they believe that science is "boring and won't produce any type of career for them." Is there any way to attract students? This paper discusses an approach being undertaken at the Estrella Mountain Community College to introduce students in selected mathematics courses to aspects of astronomy related research to demonstrate that science is anything but boring. Basic statistical techniques and understanding of geometry are applied to a large virgin data set containing the magnitudes and phase characteristics of sets of variable stars. The students' work consisted of developing and presenting a project that explored analyzing selected aspects of the variable star data set. The description of the data set, the approach the students took for research projects, and results from a survey conducted at semester's end to determine if student's interest and appreciation of astronomy was affected are presented. Using the data set provided, the students were provided the opportunity for original research and discoveries.

Walker, Douglas

353

Goldstone Apple Valley Radio Telescope  

NSDL National Science Digital Library

This fact sheet describes the Goldstone Apple Valley Radio Telescope (GAVRT) program. This educational program uses a 34-meter antenna for classroom radio astronomy observations via the Internet. It introduces students from elementary school through high school to the process of science with the goal of improving science literacy among American students.

2008-12-03

354

The Astronomy Olympiad italian experience  

NASA Astrophysics Data System (ADS)

The International Astronomy Olympiad (IAO) is an internationally annual astronomy scientific-educating event, born in 1996, which includes an intellectual competition between students aged between 14 and 17. In Italy, the Olympiad is coorganized since 2007 by INAF (Istituto Nazionale di Astrofisica) and SAiT (Società Astronomica Italiana) becoming every year a more visible and global event in the italian scenario (in 2011, INAF institutes participating to the local activities were 13). Unluckily, the Italian Committee of the Olympiads cannot involve directly nor rely on schools, since astronomy is no longer part of the scholastic programs. For this reason, the Committee needed to develop in the last years a non traditional mediatic approach that allowed in 2011 to reach a participation of more than 500 teenagers to the Olympics. We will give an overview of the Astronomy Olympics project in Italy and of this non conventional mediatic approach.

Sandrelli, S.; Giacomini, L.

2011-10-01

355

Infrared astronomy  

Microsoft Academic Search

This review paper is a survey of infrared astronomy up to early 1969. The techniques and photometric standards are mentioned briefly, and results cover solar, lunar, and planetary observations. Point sources and extended sources both within and beyond the Galaxy are included, ending with the problem of cosmic background radiation. It is concluded that great progress will be possible when

Ronald F. Webbink; William Q. Jeffers

1969-01-01

356

Astronomy Activities.  

ERIC Educational Resources Information Center

This document consists of activities and references for teaching astronomy. The activities (which include objectives, list of materials needed, and procedures) focus on: observing the Big Dipper and locating the North Star; examining the Big Dipper's stars; making and using an astrolabe; examining retograde motion of Mars; measuring the Sun's…

Greenstone, Sid

357

Astronomy Quizzes  

NSDL National Science Digital Library

This website contains a collection of quizzes from a wide range of topics. Subjects covered include historical astronomy, astronomical units and scales, telescopes, planetary geology, the sun, stellar evolution, cosmology, and life in the universe. These quizzes have five to ten multiple choice questions each. Quizzes are graded automatically and the student is told which answers are correct and incorrect.

Arny, Thomas

358

Astronomy Books  

NSDL National Science Digital Library

This reference list has 11 kid-friendly books on a wide range of astronomy topics. For each title, the publisher and publication date are included along with author name. The list includes engaging stories, field guides and other reference books.

359

Kinesthetic Astronomy  

NSDL National Science Digital Library

Kinesthetic Astronomy lessons emphasize astronomical concepts and phenomenon that people can readily encounter in their "everyday" lives such as time, seasons, and sky motions of the Sun, Moon, stars, and planets. They are intended for sixth graders up through adult learners in both formal and informal educational settings. You will be asked to register your name and email address before downloading the lessons.

360

Astronomy Adventures.  

ERIC Educational Resources Information Center

Ranger Rick's NatureScope is a creative education series dedicated to inspiring in children an understanding and appreciation of the natural world while developing the skills they will need to make responsible decisions about the environment. The topic of this issue is "Astronomy Adventures." Contents are organized into the following sections: (1)…

Braus, Judy, Ed.

1986-01-01

361

Goldstone-Apple Valley Radio Telescope System Theory of Operation  

NASA Technical Reports Server (NTRS)

The purpose of this learning module is to enable learners to describe how the Goldstone-Apple Valley Radio Telescope (GAVRT) system functions in support of Apple Valley Science and Technology Center's (AVSTC) client schools' radio astronomy activities.

Stephan, George R.

1997-01-01

362

Service Learning in Introductory Astronomy  

NASA Astrophysics Data System (ADS)

Service learning is a method of instruction where the students in a course use the course's content in a service project. The service is included as a portion of the students' course grades. During the fall semester 2010, service learning was incorporated into the Introduction to Astronomy course at Misericordia University. The class had eight students and the service project centered on hosting astronomy observations for fifth- and sixth-grade students from two nearby elementary schools. The astronomy students operated telescopes, pointed out constellations, and spoke to the audience members about the objects they were observing. Since service learning requires a minimum number of hours the students must log over the course of fulfilling the service project, the students planned alternative activities in case the weather did not allow the observations to be held. A key part of service learning is for the students to reflect on the service experience and how it influenced their learning of the course material.

Orleski, Michael

2013-12-01

363

Final report for the Chautauqua Radio Workshop Project. July 1, 1980-October 30, 1981  

SciTech Connect

Energy conservation education must reach millions of Americans in order to see any real and immediate decrease in energy consumption. Since our society gets much of its information from the media, this seems like a most effective vehicle for disseminating energy conservation information to the American Public. Radio is listened to by the vast majority of Americans each day of their lives. Radio as a communications medium is an extremely cost effective method of mass communication and education, and is perceived as a personal medium which has great potential to affect a change in the daily energy consumption habits of the public. Call-in radio programs centering around energy conservation are an effective method of presenting informative, energy education programming that provide instantaneous access for listener/consumer participation. The linking of available telephone and radio technology (via call-in radio shows) allows people all over the US, including remote rural areas, access to the latest energy conservation information and renewable energy technolgy.

Renz, B.

1982-01-25

364

GAVRT and Radio Jove: Partners in K-12 Science Teacher Training  

NASA Astrophysics Data System (ADS)

The Goldstone Apple-Valley Radio Telescope (GAVRT) program (http://www.lewiscenter.org/gavrt) and The Radio Jove Project (http://radiojove.gsfc.nasa.gov) have a recent partnership to train K-14 teachers to use radio astronomy telescopes as vehicles for science education. The partnership is part of the NASA Juno mission to Jupiter (2011 launch) education and outreach program. Teachers attend training workshops to operate a 34-meter radio telescope and/or build or operate their own simple radio telescope, both of which can be used directly in the classroom. Corresponding lesson plans and curriculum material are available on the websites. Three teacher training workshops for the GAVRT/Jove program were held in 2010 and the results of the training and usage in the classroom will be reviewed. We plan to expand teacher opportunities in 2011 by offering web-based training programs.

Higgins, C. A.; Thieman, J. R.; Nakamura, B.; Dorcey, R.

2010-12-01

365

Introduction 1.1 The Connection Between Xray Astronomy  

E-print Network

Chapter 1 Introduction 1.1 The Connection Between X­ray Astronomy and Radio Pulsars The X­ray study of rotation­powered or radio pulsars has had a close link with X­ ray astronomy from its very beginning. After the discovery of Sco X\\Gamma1 as the first extra­solar X­ray source by rocket­borne Geiger counters (Giacconi et

366

Astronomy and Astrophysics for the 1980s.  

ERIC Educational Resources Information Center

Following a discussion of scientific opportunities for astronomy (galaxies and the universe, stars, and planets/life/intelligence), four programs recommended by the National Academy of Sciences' Astronomy Survey Committee are described, indicating areas that must be strengthened before undertaking the programs. Ongoing projects are also…

Field, George B.

1982-01-01

367

The Astronomy Spacelab Payloads Study: Executive volume  

NASA Technical Reports Server (NTRS)

The progress of the Astronomy Spacelab Payloads Project at the Goddard Space Flight Center is reported. Astronomical research in space, using the Spacelab in conjunction with the Space Shuttle, is described. The various fields of solar astronomy or solar physics, ultraviolet and optical astronomy, and high energy astrophysics are among the topics discussed. These fields include scientific studies of the sun and its dynamical processes, of the stars in wavelength regions not accessible to ground based observations, and the exciting new fields of X-ray, gamma ray, and particle astronomy.

1975-01-01

368

Astronomy Education and Popularization in Serbia  

NASA Astrophysics Data System (ADS)

Astronomy education at all levels (elementary and secondary schools, universities) in Serbia is reviewed. The attempts to introduce astronomy as an elective course in elementary schools and to reintroduce astronomy as a separate subject in secondary schools are discussed. The role of the Petnica Science Center is briefly described, as well as the participation of the Serbian team in the International Astronomy Olympiads. A special emphasis is put on recent changes introduced in the accredited study programs at all five Serbian state universities. The research projects performed in two main astronomical institutions in Serbia are outlined. The numerous amateur astronomical societies in Serbia are presented and their growing activities summarized.

Atanackovic, O.

2013-05-01

369

Georgians Experience Astronomy Research in Schools: An Introduction  

Microsoft Academic Search

Georgia Department of Education and its partners at Columbus State and Georgia Southern Universities are engaged in creating a comprehensive program to institutionalize high quality astronomy in its high schools. The goal of the Georgians Experience Astronomy Research in Schools (GEARS) project is to transform the way high-school Astronomy is taught in 100% of GA's public schools by 2012. GEARS

Zodiac T. Webster; J. C. Aguilar; S. J. U. Higdon

2010-01-01

370

THE COMPACT, TIME-VARIABLE RADIO SOURCE PROJECTED INSIDE W3(OH): EVIDENCE FOR A PHOTOEVAPORATED DISK?  

SciTech Connect

We present new Karl G. Jansky Very Large Array (VLA) observations of the compact ({approx}0.''05), time-variable radio source projected near the center of the ultracompact H II region W3(OH). The analysis of our new data as well as of VLA archival observations confirms the variability of the source on timescales of years and for a given epoch indicates a spectral index of {alpha} = 1.3 {+-} 0.3 (S{sub {nu}}{proportional_to}{nu}{sup {alpha}}). This spectral index and the brightness temperature of the source ({approx}6500 K) suggest that we are most likely detecting partially optically thick free-free radiation. The radio source is probably associated with the ionizing star of W3(OH), but an interpretation in terms of an ionized stellar wind fails because the detected flux densities are orders of magnitude larger than expected. We discuss several scenarios and tentatively propose that the radio emission could arise in a static ionized atmosphere around a fossil photoevaporated disk.

Dzib, Sergio A.; Rodriguez-Garza, Carolina B.; Rodriguez, Luis F.; Kurtz, Stan E.; Loinard, Laurent; Zapata, Luis A.; Lizano, Susana, E-mail: s.dzib@crya.unam.mx [Centro de Radiostronomia y Astrofisica, Universidad Nacional Autonoma de Mexico, Morelia 58089 (Mexico)

2013-08-01

371

Young listening: An ethnography of YouthWorx Media's radio project  

Microsoft Academic Search

Listening as the act of aural consumption has commonly been the moment in cultural practice around which analysis has cohered. This has certainly been the case with the cultural objects of popular music and radio broadcasting. Where young people have been brought into the frame of such analyses, the impact of listening on the formation of the self has been

Aneta Podkalicka

2009-01-01

372

RadioSource.NET: Case-Study of a Collaborative Land-Grant Internet Audio Project.  

ERIC Educational Resources Information Center

Provides a case study of RadioSource.NET, an Internet broadcasting venture developed collaboratively by land-grant university communication departments to share resources, increase online distribution, and promote access to agricultural and natural and life science research. Describes planning, marketing, and implementation processes. (Contains 18…

Sohar, Kathleen; Wood, Ashley M.; Ramirez, Roberto

2002-01-01

373

The Green Bank Solar Radio Burst Spectrometer  

NASA Astrophysics Data System (ADS)

The Solar Radio Burst Spectrometer (SRBS) is a project designed to 1) provide high quality radio dynamic spectra to the wider solar, heliospheric, and space weather communities; 2) serve as a development platform for ultra-wideband feeds and receivers. Dynamic spectroscopy is a powerful tool for observing radio bursts in the Sun's corona. These bursts are associated with solar flares and/or coronal mass ejections and result from coronal shocks (type II radio bursts), electron beams (type III radio bursts), and other forms of energy release in the corona. The community has been hampered by a lack of readily available dynamic spectra in the 12-24 hr UT time range, a shortcoming that has now been remedied. The instrument is located at the Green Bank Site of the National Radio Astronomy Observatory in the National Radio Quiet Zone, where the effects of radio frequency interference are much reduced compared with unprotected sites. The spectrometer is composed of two swept-frequency systems that together support observations from 18 MHz to 2 GHz with a time resolution of approximately 1 sec. The low frequency system, operating from 18-70 MHz, is a standalone dipole antenna. The high frequency system is fed by an antenna mounted at the vertex of a 13.7 m telescope and operates from 70-300 MHz; a broadband feed at the prime focus of the telescope provides frequency coverage from 300-2500 MHz. The data are available daily through a web-based interface. Both raw and background-subtracted data are available in a variety of formats. Users are encouraged to view and download selected data for research or forecasting purposes.

Bastian, T. S.; Bradley, R.; White, S.; Mastrantonio, E.

2005-05-01

374

Inuit Astronomy  

NASA Astrophysics Data System (ADS)

Inuit live mainly in the treeless Arctic regions of North America, Greenland, and parts of northeastern Siberia. Their cosmology, based on shamanistic belief, constructed a view of the sky and its contents distinctively suited to their spiritual and pragmatic needs. Their astronomy, particularly for those groups living far above the Arctic Circle, reflects the unique appearance of the celestial sphere at high northerly latitudes, demonstrated most noticeably in the annual disappearance of the sun during midwinter months.

MacDonald, John

375

Astronomy Animations  

NSDL National Science Digital Library

This collection of animations introduces students to planetary motions, gravitational effects, and the scale of astronomical distances. Students can view visualizations of Earth's changing seasons, circumpolar motion, and the celestial equator and ecliptic plane. Animations on gravity explain how satellites orbit, the motions of comets and meteor storms, and gravitational 'warping'. Other animations explain how Earth's tides are produced, how astronomical distances are calculated, the use of spectra in astronomy, and the lifecycles of stars.

Barnbaum, Cecilia

2011-04-12

376

Astronomy Workshop  

NSDL National Science Digital Library

The Astronomy Workshop from the University of Maryland features interactives, animations, calculators, and other online computer-assisted learning tools enabling middle-school and older students to investigate the solar system and the universe. Units allow students to investigate astronomical distances and the size of objects in the universe; examine what might happen if objects collide; investigate orbital mechanics; visualize the distribution and motions of objects in the solar system; and many other topics.

Dr. Douglas P. Hamilton

377

Astronomy Software  

NASA Technical Reports Server (NTRS)

Software Bisque's TheSky, SkyPro and Remote Astronomy Software incorporate technology developed for the Hubble Space Telescope. TheSky and SkyPro work together to orchestrate locating, identifying and acquiring images of deep sky objects. With all three systems, the user can directly control computer-driven telescopes and charge coupled device (CCD) cameras through serial ports. Through the systems, astronomers and students can remotely operate a telescope at the Mount Wilson Observatory Institute.

1995-01-01

378

Astronomy Animations  

NSDL National Science Digital Library

This collection of animations introduces students to planetary motions, gravitational effects, and the scale of astronomical distances. Students can view visualizations of Earth's changing seasons, circumpolar motion, and the celestial equator and ecliptic plane. Animations on gravity explain how satellites orbit, the motions of comets and meteor storms, and gravitational 'warping'. Other animations explain how Earth's tides are produced, how astronomical distances are calculated, the use of spectra in astronomy, and the lifecycles of stars.

379

The Political Uses of Astronomy  

NASA Astrophysics Data System (ADS)

In its first twelve years of rule the African National Congress (ANC) Government spent more on astronomy than all governments combined between 1910-1993. Three factors drove this unexpected development: (a) national prestige; (b) dignity of the continent of Africa; and (c) Black dignity. Both astronomy and astronautics project an image of modernity - the cutting edge of high technology. When the Government supports initiatives such as SALT, SKA, the proposed national space agency, and microsats, it does so because it perceives these as having a political importance far beyond their intrinsic importance to astronomy. These project "soft power" - an image of modernity to foreign powers and foreign investors - which contribute to their intangible perceptions of South Africa. Astronomers need to encourage this trend by both greatly increasing public outreach programmes and by making representations to the media, Parliament, and other public authorities, on issues such as light pollution.

Gottschalk, K.

2007-07-01

380

Astronomy sortie missions definition study. Volume 2, book 1: Astronomy sortie program technical report  

NASA Technical Reports Server (NTRS)

The work performed to arrive at a baseline astronomy sortie mission concept is summarized. The material includes: (1) definition of the telescopes and arrays; (2) preliminary definition of mission and systems; (3) identification, definition, and evaluation of alternative sortie programs; (4) the recommended astronomy sortie program; and (5) the astronomy sortie program concept that was approved as a baseline for the remainder of the project.

1972-01-01

381

History of Teaching Astronomy in Serbian Schools  

NASA Astrophysics Data System (ADS)

There is a relative long and occasionally dissonant teaching of Astronomy in Serbia. The history of this theme is discussed in details. We read about "ups" and "downs" of astronomy in the literature and about possible historical reasons for this. We see that it is important for astronomers to be included in broad curriculum planning. We also discuss current projects to improve our elementary schools with virtual teaching of astronomy and high school astronomy science teaching via a virtual system of classrooms and observatories. The general aspects of the school system are explained in historical and modern backgrounds, too. The renewed project of astronomy teaching in high school is prepared now with a plan of the aims and activities.

Vidojevic, S.; Segan, S.

2006-08-01

382

Apollo-Soyuz test project. Volume 1: Astronomy, earth atmosphere and gravity field, life sciences, and materials processing  

NASA Technical Reports Server (NTRS)

The joint U.S.-USSR experiments and the U.S. conducted unilateral experiments performed during the Apollo Soyuz Test Project are described. Scientific concepts and experiment design and operation are discussed along with scientific results of postflight analysis.

1977-01-01

383

Development and Use of Astronomy-Like Devices for UFO Monitoring: A Research Project for the Study of UFO Physics  

Microsoft Academic Search

A research project aimed at studying unidentified atmospheric `nocturnal lights' in world areas of recurrence is presented. In such a context targets are considered and treated on a par with celestial and\\/or atmospheric objects having no fixed coordinates. Such a project involves the use of a battery of 20 mini-telescopes which can be interchangeable with wide-field lenses. Both types of

M. Teodorani

1994-01-01

384

Radio observations of the Milky Way from the classroom  

NASA Astrophysics Data System (ADS)

We present the project to introduce the first European network of radio telescopes for education. It enables pupils to detect spectral line emission of neutral hydrogen in the Milky Way at a wavelength of 21 cm. Any classroom connected to Internet via any web-browser can remotely control one of the radio-telescopes, observe and analyse obtained spectra: derive the Milky-Way rotation curve and recognise spiral arms in hydrogen distribution. Doing exercises pupils, guided by their teachers, learn the basics of radio astronomy research, use scientific method to explore and interpret the attained spectral data. A range of attractive educational materials are prepared to help in disseminating the scientific knowledge in the classroom and demonstrate the modern information technology.

Chy?y, Krzysztof T.

2014-12-01

385

Gamma ray astronomy. [survey  

NASA Technical Reports Server (NTRS)

A survey of the instruments developed for gamma ray astronomy is given together with a brief summary of the current status of the observational results. These include the studies of galactic gamma ray emission, the diffuse, presumably extragalactic, gamma radiation, and localized gamma ray sources. The study of the spatial distribution of galactic gamma radiation is beginning to provide a new means for the study of galactic structure and dynamics. The diffuse emission may provide evidence of gamma ray emission in the cosmological past, although improved observations must be obtained before the picture can be clarified. The study of localized sources has shown NP0532, the Crab radio pulsar, to be a gamma ray pulsar also and strong emission from Vela may be due to supernova produced cosmic rays interacting with the remnant gas.

Kniffen, D.

1975-01-01

386

Astronomy LITE Demonstrations  

NASA Astrophysics Data System (ADS)

Project LITE (Light Inquiry Through Experiments) is a materials, software, and curriculum development project. It focuses on light, optics, color and visual perception. According to two recent surveys of college astronomy faculty members, these are among the topics most often included in the large introductory astronomy courses. The project has aimed largely at the design and implementation of hands-on experiences for students. However, it has also included the development of lecture demonstrations that employ novel light sources and materials. In this presentation, we will show some of our new lecture demonstrations concerning geometrical and physical optics, fluorescence, phosphorescence and polarization. We have developed over 200 Flash and Java applets that can be used either by teachers in lecture settings or by students at home. They are all posted on the web at http://lite.bu.edu. For either purpose they can be downloaded directly to the user's computer or run off line. In lecture demonstrations, some of these applets can be used to control the light emitted by video projectors to produce physical effects in materials (e.g. fluorescence). Other applets can be used, for example, to demonstrate that the human percept of color does not have a simple relationship with the physical frequency of the stimulating source of light. Project LITE is supported by Grant #DUE-0125992 from the NSF Division of Undergraduate Education.

Brecher, Kenneth

2006-12-01

387

Astronomy. Inspiration. Art  

NASA Astrophysics Data System (ADS)

This paper speculates how poetry and other kind of arts are tightly related to astronomy. Hence the connection between art and natural sciences in general will be discussed in the frame of ongoing multidisciplinary project `Astronomy. Inspiration. Art' at Public Observatory in Belgrade (started in 2004). This project tends to inspire (better to say `infect') artist with a cosmic themes and fantastic sceneries of the Universe. At the very beginning of the project, Serbian poet and philosopher Laza Lazi? (who published 49 books of poetry, stories and novels), as well as writer Gordana Maleti? (with 25 published novels for children) were interested to work on The Inspiration by Astronomical Phenomena in Serbian Literature. Five young artists and scientists include their new ideas and new approach to multidisciplinary studies too (Srdjan Djuki?, Nenad Jeremi?, Olivera Obradovi?, Romana Vujasinovi?, Elena Dimoski). Two books that will be presented in details in the frame of this Project, "STARRY CITIES" (http://zavod.co.yu) and "ASTROLIES", don't offer only interesting illustrations, images from the latest astronomical observations and currently accepted cosmological theories -- those books induces, provoking curiosity in a specific and witty way, an adventure and challenge to explore and create.

Stanic, N.

2008-10-01

388

Plasma and radio waves from Neptune: Source mechanisms and propagation  

NASA Technical Reports Server (NTRS)

This report summarizes results obtained through the support of NASA Grant NAGW-2412. The objective of this project is to conduct a comprehensive investigation of the radio wave emission observed by the planetary radio astronomy (PRA) instrument on board Voyager 2 as if flew by Neptune. This study has included data analysis, theoretical and numerical calculations, ray tracing, and modeling to determine the possible source mechanism(s) and locations of the Neptune radio emissions. We have completed four papers, which are included in the appendix. The paper 'Modeling of Whistler Ray Paths in the Magnetosphere of Neptune' investigated the propagation and dispersion of lighting-generated whistler in the magnetosphere of Neptune by using three dimensional ray tracing. The two papers 'Numerical Simulations of Bursty Radio Emissions from Planetary Magnetospheres' and 'Numerical Simulations of Bursty Planetary Radio Emissions' employed numerical simulations to investigate an alternate source mechanism of bursty radio emissions in addition to the cyclotron maser instability. We have also studied the possible generation of Z and whistler mode waves by the temperature anisotropic beam instability and the result was published in 'Electron Cyclotron Wave Generation by Relativistic Electrons.' Besides the aforementioned studies, we have also collaborated with members of the PRA team to investigate various aspects of the radio wave data. Two papers have been submitted for publication and the abstracts of these papers are also listed in the appendix.

Wong, H. K.

1994-01-01

389

The Beginning of Modern Infrared Astronomy  

NASA Astrophysics Data System (ADS)

I came to the attention of astronomers through inventing the low temperature bolometer at Texas Instruments. I was quickly drawn into pioneering infrared (IR) astronomy. I soon transferred to the National Radio Astronomy Observatory and then to the University of Arizona to make astronomy my focus. Parallel programs were getting under way at the California Institute of Technology, Cornell, the Universities of Minnesota and of California, San Diego. Although our methods were crude, discoveries were easy and exciting. I was involved in many of them because I could supply good detectors and invented a number of new techniques. Eventually, I supplied detector systems and instruments through founding of a small company. By the early 1970s, systematic IR astronomy was under way on many important problems that are still active research topics. This rapid success led to investments in large new telescopes and in the IRAS survey satellite.

Low, Frank J.; Rieke, G. H.; Gehrz, R. D.

2007-09-01

390

Big data challenges for large radio arrays  

Microsoft Academic Search

Future large radio astronomy arrays, particularly the Square Kilometre Array (SKA), will be able to generate data at rates far higher than can be analyzed or stored affordably with current practices. This is, by definition, a \\

Dayton L. Jones; Kiri Wagstaff; David R. Thompson; Larry D'Addario; Robert Navarro; Chris Mattmann; Walid Majid; Joseph Lazio; Robert Preston; Umaa Rebbapragada

2012-01-01

391

The General History of Astronomy  

NASA Astrophysics Data System (ADS)

Foreword; Preface; Acknowledgements; Part I. The Birth of Astrophysics and Other Late Nineteenth-Century Trends (c.1850-c.1920); 1. The origins of astrophysics A. J. Meadows; 2. The impact of photography on astronomy John Lankford; 3. Telescope building, 1850-1900 Albert Van Helden; 4. The new astronomy A. J. Meadows; 5. Variable stars Helen Sawyer Hogg; 6. Stellar evolution and the origin of the Hertzsprung-Russell diagram David DeVorkin; Part II. Observatories and Instrumentation: 7. Astronomical institutions. Introduction Owen Gingerich, Greenwich Observatory Philip S. Laurie, Paris Observatory Jacques Lévy, Pulkovo Observatory Aleksandr A. Mikhailov, Harvard College Observatory Howard Plotkin, United States Naval Observatory Deborah Warner, Lick Observatory Trudy E. Bell, Potsdam Astrophysical Observatory Dieter B. Herrmann; 8. Building large telescopes, 1900-1950 Albert Van Helden; 9. Astronomical institutions in the southern hemisphere, 1850-1950 David S. Evans; 10. Twentieth-century instrumentation Charles Fehrenbach, with a section on 'Early rockets in astronomy' Herbert Friedman; 11. Early radio astronomy Woodruff T. Sullivan III; Appendix: The world's largest telescopes, 1850-1950 Barbara L. Welther; Illustrations: acknowledgements and sources; Index.

Gingerich, Owen

2010-04-01

392

TeachAstronomy.com - Digitizing Astronomy Resources  

NASA Astrophysics Data System (ADS)

Teach Astronomy—a new, free online resource—can be used as a teaching tool in non-science major introductory college level astronomy courses, and as a reference guide for casual learners and hobbyists. Digital content available on Teach Astronomy includes: a comprehensive introductory astronomy textbook by Chris Impey, Wikipedia astronomy articles, images from Astronomy Picture of the Day archives and (new) AstroPix database, two to three minute topical video clips by Chris Impey, podcasts from 365 Days of Astronomy archives, and an RSS feed of astronomy news from Science Daily. Teach Astronomy features an original technology called the Wikimap to cluster, display, and navigate site search results. Development of Teach Astronomy was motivated by steep increases in textbook prices, the rapid adoption of digital resources by students and the public, and the modern capabilities of digital technology. This past spring semester Teach Astronomy was used as content supplement to lectures in a massive, open, online course (MOOC) taught by Chris Impey. Usage of Teach Astronomy has been steadily growing since its initial release in August of 2012. The site has users in all corners of the country and is being used as a primary teaching tool in at least four states.

Hardegree-Ullman, Kevin; Impey, C. D.; Austin, C.; Patikkal, A.; Paul, M.; Ganesan, N.

2013-06-01

393

Egyptian astronomy.  

NASA Astrophysics Data System (ADS)

In Egypt, stars and planets were seen as goods and astronomy was practiced by priests in the temples. The most important time cycle of the Egyptian calendar was that of the heliac rising of Sirius during all the history of Ancient Egypt. Thus Egyptian astronomers built a calendar of 365 days, which was never corrected and in which the heliacal raising was evidently shifting at the rate of one day every four years. The year had twelve months of thirty days and a holy period of five days.

Andrillat, H.

394

Astronomy stories  

NASA Astrophysics Data System (ADS)

For many years I have taught physics and astronomy courses to liberal arts students. I have found most of my students to be intelligent and diligent, but not anxious to study science. They typically take the class only because their degree requires a science course. Many arrive having already decided they will not be able to do the math or understand the scientific concepts, and have essentially built a wall between themselves and science. In the 1990s, in an effort to help break down that wall, as part of an NSF-supported course, "The Evolution of the Universe, Earth and Life," I began using creative writing assignments.

Berenson, Rhoda

2015-03-01

395

Astronomy Mission Module  

NSDL National Science Digital Library

This is a lesson about finding habitable planets. Learners will use an online, multimedia module to simulate the techniques that scientists might use to find a star system and planet that meet the astronomical conditions required for human habitability. Students then summarize their learning from this unit in a final project. The lesson models scientific inquiry using the 5E instructional model and includes teacher notes, prerequisite concepts, common misconceptions, student journal and reading. This is lesson 13 in the Astro-Venture Astronomy Unit. The lessons are designed for educators to use in conjunction with the Astro-Venture multimedia modules.

396

NAOJ's activities on Astronomy for Development: Aiding Astronomy Education in Developing Nations  

NASA Astrophysics Data System (ADS)

We summarize NAOJ's efforts to promote astronomy in developing nations. The Office of International Relations, collaborations with the Office of Public Outreach at NAOJ and with the East Asia Core Observatories Association (EACOA), has engaged children, students and educators about astronomy development in the Asia-Pacific region. In particular, we introduce ``You are Galileo!`` project, which is a very well received astronomy education program for children. We also report on a continuing effort by the Japanese Government in support of astronomy programs in the developing nations.

Sekiguchi, K.; Yoshida, F.

2015-03-01

397

Early infrared astronomy  

NASA Astrophysics Data System (ADS)

I present a short history of infrared astronomy, from the first scientific approaches of the ‘radiant heat’ in the seventeenth century to the 1970's, the time when space infrared astronomy was developing very rapidly. The beginning of millimeter and submillimeter astronomy is also covered. As the progress of infrared astronomy was strongly dependent on detectors, some details are given on their development.

Lequeux, James

2009-07-01

398

Astronomy Books of 1985.  

ERIC Educational Resources Information Center

Provides annotated listing of books in 16 areas: (1) amateur astromony; (2) children's books; (3) comets; (4) cosmology; (5) education in astronomy; (6) general astronomy; (7) history of astronomy; (8) life in the universe; (9) miscellaneous; (10) physics and astronomy; (11) pseudo-science; (12) space exploration; (13) stars and stellar evolution;…

Mercury, 1986

1986-01-01

399

The ALMA Phasing Project: New Frontiers in Ultra-High Resolution Astronomy Enabled by a Beamformed ALMA  

NASA Astrophysics Data System (ADS)

The Atacama Millimeter/submillimeter Array (ALMA) Phasing Project (APP) is an ongoing ALMA Development Project that will provide the means to coherently sum all of the individual ALMA antennas, allowing them to effectively function as a single aperture. This capability will allow ALMA to participate in global Very Long Baseline Interferometry (VLBI) networks operating in the millimeter and submillimeter, offering a dramatic improvement in sensitivity. This will in turn afford a wide range of new ultra-high angular resolution science applications. This poster will provide an overview of the APP design and implementation plan and highlight examples of new science enabled by a beamformed ALMA (including the study of black holes on Event Horizon scales, the detailed investigation of the launch and collimation of astrophysical jets, and astrometry of astrophysical masers with unprecedented precision). Commissioning and Science Verification of the APP is slated to begin in early 2014.

Matthews, Lynn D.; Alef, W.; Anderson, J.; Barkats, D.; Crew, G. B.; Doeleman, S. S.; Fish, V. L.; Greenberg, J.; Hecht, M. H.; Hiriart, R.; Honma, M.; Impellizzeri, C.; Inoue, M.; Lacasse, R.; Lopez, B.; Mora-Klein, M.; Nagar, N.; Pankratius, V.; Pradel, N.; Rottmann, H.; Roy, A.; Ruszczyk, C.; Saez, A.; Shillue, B.; Treacy, R.; ALMA Phasing Project Team

2014-01-01

400

Astronomers Without Borders: A Global Astronomy Community  

NASA Astrophysics Data System (ADS)

Astronomers Without Borders (AWB) brings together astronomy enthusiasts of all types - amateur astronomers, educators, professionals and "armchair" astronomers for a variety of online and physicalworld programs. The AWB web site provides social networking and a base for online programs that engage people worldwide in astronomy activities that transcend geopolitical and cultural borders. There is universal interest in astronomy, which has been present in all cultures throughout recorded history. Astronomy is also among the most accessible of sciences with the natural laboratory of the sky being available to people worldwide. There are few other interests for which people widely separated geographically can engage in activities involving the same objects. AWB builds on those advantages to bring people together. AWB also provides a platform where projects can reach a global audience. AWB also provides unique opportunities for multidisciplinary collaboration in EPO programs. Several programs including The World at Night, Global Astronomy Month and others will be described along with lessons learned.

Simmons, M.

2011-10-01

401

Successful Innovative Methods in Introducing Astronomy Courses  

NASA Astrophysics Data System (ADS)

Innovating new informative methods to induce interest in students has permitted us to introduce astronomy in several universities and institutes in Mexico. As a prelude, we gave a popular course in the history of astronomy. This was very easy as astronomy seems to be the most ancient of sciences and relating the achievements of the ancient philosophers/scientists was very enlightening. Then we put up an amateur show of the sky every week (subject to climatic conditions for observability). We showed how to take photographs and make telescopic observations. We enlightened the students of the special missions of NASA and took them to museums for space exploration. We gave a popular seminar on "Astrodynamics," highlighting its importance. We gave a series of introductory talks in radio and T.V. Finally we exposed them to electronic circulars, like "Universe Today" and "World Science." The last mentioned strategy had the most electrifying effect. We may not have been successful without it, as the students began to take the matter seriously only after reading numerous electronic circulars. In this respect, these circulars are not only informative about the latest news in astronomy, but highlight the role of astronomy in the modern world. Without it, students seem to relate astronomy to astrology; it is due to this misconception that they are not attracted to astronomy. Students were hardly convinced of the need for an astronomy course, as they did not know about the scope and development of the subject. This awakened the interests of students and they themselves proposed the initiation of an elementary course in astronomy to have a feel of the subject. Later on they proposed a course on "Rocket Dynamics." We will discuss our methods and their impact in detail.

Chattejee, T. K. C.

2006-08-01

402

Music and Astronomy Under The Stars after 4 years and 50,000 People  

NASA Astrophysics Data System (ADS)

Since 2009 my NASA-funded Music and Astronomy Under the Stars (MAUS) program has brought astronomy to 50,000 music lovers at the National Mall (co-sponsor OSTP); Central Park Jazz, Newport Folk, Ravinia, or Tanglewood music festivals; and classical, folk, pop/rock, opera, Caribbean, or county-western concerts in parks assisted by astronomy clubs (55 events; 28parks). MAUS combines solar, optical, and radio telescope observations; live image projection; large posters/banners (From the Earth to the Universe and Visions of the Universe); videos; and hands-on activities (Night Sky Network; Harvard-Smithsonian CfA); imaging with a cell phone mount; and hand-outs(with info on science museums, astronomy clubs, and citizen science before and after the concerts or at intermission. Yo-Yo-Ma, the Chicago and Boston Symphony Orchestras, the McCoy Tyner Quartet, Ravi Coltrane, Esperanza Spalding, the Stanley Clarke Band, Phish, Blood Sweat and Tears, Deep Purple, Patti Smith, Tony Orlando, and Ronan Tynan performed at these concerts. MAUS reached underserved groups and attracted large enthusiastic crowds. Many young children participated in this family learning experience-often the first time they looked through a telescope. Lessons learned: plan early; create partnerships with parks and astronomy clubs; test equipment; have backup equipment; create professional displays; select the best location to obtain a largest number of participants; use media/www sites to promote the events; use many telescopes for multipletargets; project a live image or video; select equipment that is easy to use, store, set-up, and take down; use hands-on astronomy activities; position the displays for maximum visibility (they became teachable moments); and have educator hand-outs. While < 50% of the participants attended a science museum or took part in astronomy programs in the previous year (based on our survey), they found MAUS enjoyable and understandable; learned about astronomy; wanted to learn more; and increased their interest in science (ave. rating 4.6/5). Taking science directly to people is effective in promoting scienceeducation! Sponsor: NASA grant NNX09AD53G

Lubowich, Donald A.

2013-01-01

403

Development and Use of Astronomy-Like Devices for UFO Monitoring: A Research Project for the Study of UFO Physics  

NASA Astrophysics Data System (ADS)

A research project aimed at studying unidentified atmospheric `nocturnal lights' in world areas of recurrence is presented. In such a context targets are considered and treated on a par with celestial and/or atmospheric objects having no fixed coordinates. Such a project involves the use of a battery of 20 mini-telescopes which can be interchangeable with wide-field lenses. Both types of light collectors, which are intended to work in the near-IR, optical and near-UV ranges, are planned to be connected to detectors for CCD imaging and fast photon-counting photometry, to objective-prisms for low-resolution spectroscopy and to grism-slit spectrographs for high-resolution spectroscopy. The overall measurement instrumental platform is intended to be guided simultaneously by a radar, by an IR alarm sensor and by a laser telemetric device in order to allow physical scientists to search, point and track a given bright flying object which is characterized supposedly by random motions. Finally, physical informations which are expected to come out from data analysis are presented and discussed in detail.

Teodorani, M.

404

Music and Astronomy Under the Stars 2009  

NASA Astrophysics Data System (ADS)

Bring telescopes to where the people are! Music and Astronomy Under the Stars is a three-year NASA-funded astronomy outreach program at community parks during and after music concerts and outdoor family events—such as a Halloween Stars-Spooky Garden Walk. While there have been many astronomy outreach activities and telescope observations at city sidewalks and parks, this program targets a completely different audience: music lovers who are attending summer concerts held in community parks. These music lovers who may never have visited a science museum, planetarium, or star party are exposed to telescope observations and astronomy information with no additional travel costs. Music and Astronomy Under the Stars increased awareness, engagement, and interest in astronomy at classical, pop, rock, and ethnic music concerts. This program includes solar observing before the concerts, telescope observations including a live image projection system, an astronomical video presentation, and astronomy banners/posters. Approximately 500-16,000 people attended each event and 25% to 50% of the people at each event participated in the astronomy program. This program also reached underrepresented and underserved groups (women, minorities, older adults). The target audience (Nassau and Suffolk Counties, New York) is 2,900,000 people, which is larger than combined population of Atlanta, Boston, Denver, Minneapolis, and San Francisco. Although eleven events were planned in 2009, two were canceled due to rain and our largest event, the NY Philharmonic in the Park (attended by 67,000 people in 2008), was cancelled for financial reasons. Our largest event in 2009 was the Tanglewood Music Festival, Lenox MA, attended by 16,000 people where over 5000 people participated in astronomy activities. The Amateur Observers' Society of New York assisted with the NY concerts and the Springfield STARS astronomy club assisted at Tanglewood. In 2009 over 15,000 people participated in astronomy activities at these events which were attended by approximately 50,000 people.

Lubowich, D.

2010-08-01

405

The Evaluation of a Public Document: The Case of FCC's Marine Radio Rules for Recreational Boaters. Document Design Project, Technical Report No. 11.  

ERIC Educational Resources Information Center

In a collaborative effort, the Federal Communications Commission (FCC) and the Document Design Project conducted an evaluation of marine radio rules for recreational boaters that had been rewritten in plain English by FCC personnel. The revised rules were evaluated by 53 experienced boaters and 52 inexperienced boaters, who were given either the…

Felker, Daniel B.; Rose, Andrew M.

406

Infrared Astronomy  

NSDL National Science Digital Library

Despite the claims of certain science fiction novels and films, humans cannot see in infrared. As many people know, the primary source of infrared radiation is heat, and the study of infrared astronomy allows scientists to detect radiation emitted from objects throughout the universe. This delightful website (created by NASA and the Infrared Processing and Analysis Center at the California Institute of Technology) provides a wide range of material on this fascinating area of scientific study. Visitors can lean about the discovery of infrared, learn about the technology that is used in such endeavors, and of course, look over dozens of infrared images and video clips. Educators will be glad to learn that there are a number of activities offered here for use in the classroom, including one that will help students learn how to build a photocell detector.

Hermans-Killam, Linda

407

From Giza to the Pantheon: astronomy as a key to the architectural projects of the ancient past  

NASA Astrophysics Data System (ADS)

In many of the ``wonders'' of our past, information about their meaning and scope has been encoded in the form of astronomical alignments to celestial bodies. Therefore, in many cases, understanding the ideas of the ancient architects turns out to be connected with the study of the relationship of their cultures with the sky. This is the aim of archaeoastronomy, a discipline which is a quite efficacious tool in unraveling the original projects of many monuments. This issue is briefly discussed here by means of three examples taken from three completely different cultures and historical periods: the so-called ``air shafts'' of the Great Pyramid, the urban layout of the capital of the Incas, and the design of the Pantheon.

Magli, Giulio

2011-06-01

408

Organizations and Strategies in Astronomy, volume 4  

NASA Astrophysics Data System (ADS)

This book is the fourth volume under the title Organizations and Strategies in Astronomy (OSA). These OSA Books are intended to cover a large range of fields and themes. In practice, one could say that all aspects of astronomy-related life and environment are considered in the spirit of sharing specific expertise and lessons learned. This book offers a unique collection of chapters dealing with socio-dynamical aspects of the astronomy (and related space sciences) community: characteristics of organizations, society activities, strategies for development, operational techniques, observing practicalities, environmental constraints, educational policies, public outreach, journal and magazine profiles, publication studies, electronic-media problematics, research communication, evaluation and selection procedures, research indicators, national policies and specificities, expertise sharing, contemporary history, and so on. The experts contributing to this book have done their best to write in a way understandable to readers not necessarily hyperspecialized in astronomy while providing specific detailed information and sometimes enlightening 'lessons learned' sections. The book concludes with an updated bibliography of publications related to socio-astronomy and to the interactions of the astronomy community with the society at large. This book will be most usefully read by researchers, teachers, editors, publishers, librarians, sociologists of science, research planners and strategists, project managers, public-relations officers, plus those in charge of astronomy-related organizations, as well as by students aiming at a career in astronomy or related space science. Link: http://www.wkap.nl/prod/b/1-4020-1526-7

Heck, A.

2003-10-01

409

Organizations and Strategies in Astronomy Vol. 7  

NASA Astrophysics Data System (ADS)

This book is the seventh volume under the title Organizations and Strategies in Astronomy (OSA). The OSA series covers a large range of fields and themes: in practice, one could say that all aspects of astronomy-related life and environment are considered in the spirit of sharing specific expertise and lessons learned. The chapters of this book are dealing with socio-dynamical aspects of the astronomy (and related space sciences) community: characteristics of organizations, strategies for development, operational techniques, observing practicalities, journal and magazine profiles, public outreach, publication studies, relationships with the media, research communication, series of conferences, evaluation and selection procedures, research indicators, national specificities, contemporary history, and so on. The experts contributing to this volume have done their best to write in a way understandable to readers not necessarily hyperspecialized in astronomy while providing specific detailed information and sometimes enlightening 'lessons learned' sections. The book concludes with an updated bibliography of publications related to socio-astronomy and to the interactions of the astronomy community with the society at large. This volume will be most usefully read by researchers, editors, publishers, librarians, sociologists of science, research planners and strategists, project managers, public-relations officers, plus those in charge of astronomy-related organizations, as well as by students aiming at a career in astronomy or related space sciences.

Heck, Andre

2006-12-01

410

Scientific Ballooning: Astronomy from the Edge of Space  

E-print Network

in New Mexico, they successfully deployed a gamma-ray astronomy experiment to an altitude of almost 130 on a balloon-based gamma-ray astronomy project. Since that time he has been involved in a variety of research projects in high-energy astrophysics, most notably the Compton Gamma-Ray Observatory (which orbited

411

Teaching and Learning Astronomy  

NASA Astrophysics Data System (ADS)

Preface; Part I. Astronomy in the Curriculum Around the World: Preface; 1. Why astronomy is useful and should be included in the school curriculum John R. Percy; 2. Astronomy and mathematics education Rosa M. Ros; 3. Astronomy in the curriculum around the world; 4. Engaging gifted science students through astronomy Robert Hollow; 5. Poster highlights: astronomy in the curriculum around the world; Part II. Astronomy Education Research: Preface; 6. Astronomy education research down under John M. Broadfoot and Ian S. Ginns; 7. A contemporary review of K-16 astronomy education research Janelle M. Bailey and Timothy F. Slater; 8. Implementing astronomy education research Leonarda Fucili; 9. The Astronomy Education Review: report on a new journal Sidney C. Wolff and Andrew Fraknoi; 10. Poster highlights: astronomy education research; Part III. Educating Students: Preface; 11. Textbooks for K-12 astronomy Jay M. Pasachoff; 12. Distance/internet astronomy education David H. McKinnon; 13. Educating students with robotic telescopes - open discussion; 14. Poster highlights - educating students; Part IV. Educating teachers: Preface; 15. Pre-service astronomy education of teachers Mary Kay Hemenway; 16. In-service education of teachers Michèle Gerbaldi; 17. Poster highlights: educating teachers; Part V. Astronomy and Pseudoscience: Preface; 18. Astronomy, pseudoscience and rational thinking Jayant V. Narlikar; 19. Astronomical pseudosciences in North America John R. Percy and Jay M. Pasachoff; Part VI. Astronomy and Culture: Preface; 20. Teaching astronomy in other cultures: archeoastronomy Julieta Fierro; 21. Poster highlights: astronomy and culture; Part VII. Astronomy in Developing Countries: Preface; 22. Astronomy Curriculum for developing countries Case Rijsdijk; 23. Science education resources for the developing countries James C. White II; Part VIII. Public Outreach in Astronomy: Preface; 24. What makes informal education programs successful? Nahide Craig and Isabel Hawkins; 25. The role of science centers and planetariums Nick Lomb; 26. Science education for the new century - a European perspective Claus Madsen; 27. Communicating astronomy to the public Charles Blue; 28. Poster highlights: public outreach in astronomy; Part IX. The Education Programs of the IAU: Preface; 29. A short overview of astronomical education carried out by the IAU Syuzo Isobe; Part X. Discussion; Index.

Pasachoff, Jay; Percy, John

2005-12-01

412

Teaching and Learning Astronomy  

NASA Astrophysics Data System (ADS)

Preface; Part I. Astronomy in the Curriculum Around the World: Preface; 1. Why astronomy is useful and should be included in the school curriculum John R. Percy; 2. Astronomy and mathematics education Rosa M. Ros; 3. Astronomy in the curriculum around the world; 4. Engaging gifted science students through astronomy Robert Hollow; 5. Poster highlights: astronomy in the curriculum around the world; Part II. Astronomy Education Research: Preface; 6. Astronomy education research down under John M. Broadfoot and Ian S. Ginns; 7. A contemporary review of K-16 astronomy education research Janelle M. Bailey and Timothy F. Slater; 8. Implementing astronomy education research Leonarda Fucili; 9. The Astronomy Education Review: report on a new journal Sidney C. Wolff and Andrew Fraknoi; 10. Poster highlights: astronomy education research; Part III. Educating Students: Preface; 11. Textbooks for K-12 astronomy Jay M. Pasachoff; 12. Distance/internet astronomy education David H. McKinnon; 13. Educating students with robotic telescopes - open discussion; 14. Poster highlights - educating students; Part IV. Educating teachers: Preface; 15. Pre-service astronomy education of teachers Mary Kay Hemenway; 16. In-service education of teachers Michèle Gerbaldi; 17. Poster highlights: educating teachers; Part V. Astronomy and Pseudoscience: Preface; 18. Astronomy, pseudoscience and rational thinking Jayant V. Narlikar; 19. Astronomical pseudosciences in North America John R. Percy and Jay M. Pasachoff; Part VI. Astronomy and Culture: Preface; 20. Teaching astronomy in other cultures: archeoastronomy Julieta Fierro; 21. Poster highlights: astronomy and culture; Part VII. Astronomy in Developing Countries: Preface; 22. Astronomy Curriculum for developing countries Case Rijsdijk; 23. Science education resources for the developing countries James C. White II; Part VIII. Public Outreach in Astronomy: Preface; 24. What makes informal education programs successful? Nahide Craig and Isabel Hawkins; 25. The role of science centers and planetariums Nick Lomb; 26. Science education for the new century - a European perspective Claus Madsen; 27. Communicating astronomy to the public Charles Blue; 28. Poster highlights: public outreach in astronomy; Part IX. The Education Programs of the IAU: Preface; 29. A short overview of astronomical education carried out by the IAU Syuzo Isobe; Part X. Discussion; Index.

Pasachoff, Jay; Percy, John

2009-07-01

413

Astropy: Community Python Software for Astronomy  

NASA Astrophysics Data System (ADS)

The Astropy Project is a community effort to develop an open source Python package of common data structures and routines for use by other, more specialized astronomy software in Python in order to foster software interoperability in the astronomical community. The project encompasses Astropy's ”core” and ”affiliated" packages that adopt Astropy’s coding, testing and documentation standards. By doing so we aim to improve interoperability with other Python packages in astronomy, and help a broader community implement more Pythonic solutions to astronomy computing problems while minimizing duplication of effort. The project provides a template for other projects that use Astropy to reuse much of Astropy’s development framework without reinventing the wheel. Here we present an overview of the key features of the core package (existing and upcoming), current and planned affiliated packages, and how we manage a large open source project with a diverse community of contributors.

Greenfield, Perry; Tollerud, E. J.; Robitaille, T.; Developers, Astropy

2014-01-01

414

Astronomy Education: a Challenge for Contemporary Education  

NASA Astrophysics Data System (ADS)

Tales around the World give visibility to local, national and international fundamental connection that always existed between people and the night sky that means Astronomy. In this paper we discuss and analyze further the role of Astronomy Education for achieving an integrated concept of education, one that enables individuals to adapt to a rapidly changing social, economic and cultural environment, and to continue to learn throughout life. It is no longer enough to learn how to read, write and count. We also discuss and present initiatives undertaken in the context of various national, and international educational projects in Greece as best practices on how Astronomy Education can actually reinforce the Contemporary Education.

Metaxa, M.

2010-07-01

415

The SERENDIP piggyback SETI project.  

PubMed

The SERENDIP project is an ongoing program of monitoring and processing broadband radio signals acquired by existing radio astronomy observatories. SERENDIP operates in a piggyback mode: it makes use of whatever observing plan (sequence of frequencies, sky coordinates, and polarizations) is under way at its host observatory. Moreover, the SERENDIP data acquisition system, once installed, operates autonomously. This approach makes it possible to obtain large amounts of high quality observing time in a manner that is economical and that does not adversely affect ongoing radio astronomy survey work. The SERENDIP II system has been installed at the NRAO 300-foot telescope at Green Bank, West Virginia, and has operated there for several thousand hours. In this report, we summarize our findings from these observations and describe the present status of the project. Two key elements of SERENDIP are the automated data acquisition system that uses adaptive thresholds and logs only statistically significant peaks in the real-time power spectra, and the subsequent off-line analysis programs that identify and reject a variety of interference signals. Several specific correlations have been identified that offer promise. At present, the development and testing of these interference rejection algorithms is the main thrust of our work. PMID:11537162

Lampton, M; Bowyer, S; Werthimer, D; Donnelly, C; Herrick, W

1992-01-01

416

Bringing Astronomy Directly to People Who Do Not Come to Star Parties, Science Museums, or Science Festivals  

NASA Astrophysics Data System (ADS)

My successful programs have included telescope observations, hands-on activities, and edible astronomy demonstrations for: outdoor concerts or music festivals; the National Mall; churches, synagogues, seminaries, or clergy conferences; the Ronald McDonald House of Long Island (New Hyde Park, NY), the Winthrop University Hospital Children’s Medical Center (Mineola, NY); the Fresh Air Fund summer camps; a Halloween star party with costumed kids looking through telescopes; a Super Bowl Star Party; the World Science Festival (NYC); the Princeton University Science and Engineering Expo; the USA Science and Engineering Festival; and the NYC Columbus Day Parade. These outreach activities have reached thousands of people including many young girls. Information was also provided about local science museums, citizen science projects, astronomy educational sites, and astronomy clubs to encourage learning after these events. In 2010 I created Astronomy Night on the National Mall (co-sponsored the White House Office of Science and Technology Policy) with the participation of astronomy clubs, Chandra X-Ray Center, STScI, NASA, NOAO, NSF and the National Air and Space Museum. Since 2009 my NASA-funded Music and Astronomy Under the Stars (MAUS) program has brought astronomy to 50,000 music lovers who attended the Central Park Jazz, Newport Folk, Tanglewood, or Ravinia music festivals or classical, folk, rock, pop, opera, or county-western concerts in local parks assisted by astronomy clubs. MAUS is an evening, nighttime, and cloudy weather traveling astronomy program combining solar, optical, and radio telescope observations; a live image projection system; large outdoor posters and banners; videos; and hands-on activities before and after the concerts or at intermission. Yo-Yo-Ma and the Chicago Symphony or Boston Symphony Orchestras, the McCoy Tyner Quartet with Ravi Coltrane, Esperanza Spalding, the Stanley Clarke Band, Phish, Blood Sweat and Tears, Deep Purple, Patti Smith, Tony Orlando, and Ronan Tynan have performed at these concerts. MAUS attracts large enthusiastic crowds often with young children participating in this family learning experience - often the first time these children looked through a telescope.

Lubowich, Donald A.

2013-01-01

417

Nontechnical Astronomy Books of 1989.  

ERIC Educational Resources Information Center

Presented are 126 reviews. Categories include amateur astronomy, children's books, computers and astronomy, cosmic rays, cosmology, education in astronomy, galaxies, general astronomy, history of astronomy, life in the universe, physics and astronomy, pseudoscience, quasars and active galaxies, reference, solar system, space exploration, stars and…

Mercury, 1990

1990-01-01

418

Radio Telescope Gets Star Treatment  

NASA Astrophysics Data System (ADS)

Actress Jodie Foster, who played a scientist in search of extraterrestrial life in the 1997 film Contact, narrates a new promotional film to reintroduce the public to the National Radio Astronomy Observatory's (NRAO) renovated Karl G. Jansky Very Large Array (VLA) radio telescope in New Mexico. The 24-minute film, Beyond the Visible, which will air in the VLA Visitor Center, focuses on the operation of the telescope and scientific achievements associated with it.

Showstack, Randy

2013-11-01

419

Observatory Publishes Memoir of Pioneer Radio Astronomer  

NASA Astrophysics Data System (ADS)

One of the pioneers of radio astronomy tells her story of the formative years of that science in a memoir published by the National Radio Astronomy Observatory. Dr. Nan Dieter Conklin's book, Two Paths to Heaven's Gate, recounts her experiences making important scientific discoveries in an era when astronomy's "vision" was first extending beyond the light discernable to human eyes. Book Cover CREDIT: NRAO/AUI/NSF Conklin's story is remarkable not only because of her impressive scientific achievements, but also "because she was a woman who nevertheless pursued and succeeded in science -- the first U.S. woman whose Ph.D. thesis was based on her own radio astronomy research and the first U.S. woman to publish original radio astronomy research in a refereed journal -- and because she lived and worked with the degenerative disease multiple sclerosis," according to Claire Hooker of the University of Toronto. In the memoir, Conklin recounts her career and life from the awakening stirred by her first astronomy course at Goucher College in Baltimore, to junior research jobs in Washington, D.C., to graduate school at Harvard and ultimately to the faculty of the University of California at Berkeley. In addition to providing an insider's view of the process of scientific discovery, Conklin also gives the reader a fascinating look at a scientific community and social structure that, though only a half-century removed from the present, was vastly different from today's. Along the way, Conklin candidly reveals the person behind the science -- the person who dealt with the joys and tragedies of life while remaining dedicated to unlocking the secrets of the Universe. "Nan was and remains an inspiration to myself and hundreds of others in the field, both for her scientific acumen and for her ability to overcome extraordinary personal challenges," said Miller Goss of the National Radio Astronomy Observatory. The National Radio Astronomy Observatory is a facility of the National Science Foundation, operated under cooperative agreement by Associated Universities, Inc.

2006-07-01

420

Green Bank (National Radio Astronomical Observatory)  

NASA Astrophysics Data System (ADS)

Located in Green Bank, Pocahontas County, West Virginia. The site of the world's largest fully steerable radio telescope, which was under construction during 1999 and 2000. The National Radio Astronomy Observatory (NRAO) is a facility of the US National Science Foundation, and is operated under a cooperative agreement by Associated Universities, Inc. (AUI)....

Murdin, P.

2000-11-01

421

Radio Galaxies.  

ERIC Educational Resources Information Center

Provides background information on radio galaxies. Topic areas addressed include: what produces the radio emission; radio telescopes; locating radio galaxies; how distances to radio galaxies are found; physics of radio galaxies; computer simulations of radio galaxies; and the evolution of radio galaxies with cosmic time. (JN)

Downes, Ann

1986-01-01

422

Astronomy Links  

NSDL National Science Digital Library

Here are some links to Astronomy applets, animations, and movies. Celestial and Terrestrial Motions Sky and telescope Interactive Sky Chart Rotating Sky Explorer Ecliptic (Zodiac) Simulator Seasonal Solar Motions Antarctica Time Lapse: A Year on Ice Aurora Australis: The Southern Lights [Daylight Hours Explorer Season as viewed from Space Animation Sun Position and Season animation Paths of the Sun Seasons and Ecliptic Simulator Sun s Rays Simulator Sun Motions Simulator Time-Lapse Seasons Simulator Kepler's Laws of Planetary Motion Kepler s 1st and 2nd laws Applet Orbit Applet Planetary Orbit Simulator Gravity Simulator Moon Phases and Satellite Motions Lunar and Solar Eclipse Information Moon Phase Animation What Causes Tides Lunar Phase Quizzer Eclipse Shadow Simulator Moon Phases and the Horizon Diagram Synodic Lag The Solar System Solar and Heliospheric Observatory (SOHO) Images Planetary Photo Journal Planetary Configuration Simulator Geocentric Retrograde Motion Animation Epicycle / Orbit Applet Gravity Simulator Ptolemaic Orbit of Mars The Universe Virtual Reality Milky Way Panorama Interactive H-R Diagram Element Absorption and Emision Lines Doppler Shift Demonstrator Lookback Time Simulator Other: SpaceWeather.com ...

Mr. Teitelbaum

2010-11-18

423

Challenges in Astronomy Education  

NASA Astrophysics Data System (ADS)

Astronomy is an attractive subject for education. It deals with fascination of the unknown and the unreachable, yet is uses tools, concepts and insights from various fundamental sciences such as mathematics, physics, chemistry, biology. Because of this it can be well used for introducing sciences to young people and to raise their interest in further studies in that direction. It is also an interesting subject for teaching as its different aspects (observation techniques, theory, data sampling and analysis, modelling,?) offer various didactical approaches towards different levels of pupils, students and different backgrounds. And it gives great opportunities to teach and demonstrate the essence of scientific research, through tutorials and projects. In this paper we discuss some of the challenges education in general, and astronomy in particular, faces in the coming decades, given the major geophysical and technological changes that can be deducted from our present knowledge. This defines a general, but very important background in terms of educational needs at various levels, and in geographical distribution of future efforts of the astronomical community. Special emphasis will be given to creative approaches to teaching, to strategies that are successful (such as the use of tutorials with element from computer games), and to initiatives complementary to the regular educational system. The programs developed by the IAU will be briefly highlighted.

De Greve, Jean-Pierre

2010-11-01

424

Astronomy in Iran  

NASA Astrophysics Data System (ADS)

Institute for Advanced Studies in Basic Sciences, Zanjan, Iran In spite of her renowned pivotal role in the advancement of astronomy on the world scale during 9th to 15th centuries, Iran's rekindled interest in modern astronomy is a recent happening. Serious attempts to introduce astronomy into university curricula and to develop it into a respectable and worthwhile field of research began in the mid 60's. The pioneer was Shiraz University. It should be credited for the first few dozens of astronomy- and astrophysics- related research papers in international journals, for training the first half a dozen of professional astronomers and for creating the Biruni Observatory. Here, I take this opportunity to acknowledge the valuable advice of Bob Koch and Ed Guinan, then of the University of Pennsylvania, in the course of the establishment of this observatory. At present the astronomical community of Iran consists of about 65 professionals, half university faculty members and half MS and PhD students. The yearly scientific contribution of its members has, in the past three years, averaged to about 15 papers in reputable international journals, and presently has a healthy growth rate. Among the existing observational facilities, Biruni Observatory with its 51 cm Cassegrain, CCD cameras, photometers and other smaller educational telescopes, is by far the most active place. Tusi Observatory of Tabriz University has 60 and 40 cm Cassegrains, and a small solar telescope. A number of smaller observing facilities exist in Meshed, Zanjan, Tehran, Babol and other places. The Astronomical Society of Iran (ASI), though some 30 years old, has expanded and institutionalized its activities since early 1990's. ASI sets up seasonal schools for novices, organizes annual colloquia and seminars for professionals and supports a huge body of amateur astronomers from among high school and university students. Over twenty of ASI members are also members of IAU and take active part in its events. In the past five years, astronomers of Iran have staged an intensive campaign to have a National Observatory of their Own (NOI). Initial planning is for one 2 m telescope and appropriate measuring devices. The project is approved and will be funded by the government in the course of five years. The site selection for NOI, however, is already in its third year and has been and is being generously funded by the government. Last, but not least, Nojum, the only astronomical monthly magazine of the Middle East, is presently in its fifteenth year. It has a good readership among both professionals and amateurs of Farsi speaking communities within the country and abroad. .

Sobouti, Y.

2006-08-01

425

5/29/13 BDlive -Print Article www.bdlive.co.za/national/science/2013/05/17/radio-astronomy-publication-a-milestone-for-sa?service=print 1/1  

E-print Network

Astronomers working on the KAT-7 radio telescope have published their first scientific paper ASTRONOMERS working on the KAT-7 radio telescope have published their first scientific paper, a milestone (SKA), which will be the world's most powerful radio telescope when completed. South Africa is co

Jarrett, Thomas H.

426

The Design of the Low Frequency All Sky Monitor (LoFASM) for the Study of Radio Transients and Student Training  

NASA Astrophysics Data System (ADS)

The Astronomy and Astrophysics Decadal Survey (Astro2010) identified transient science and time-domain studies as one of the most promising discovery areas of the coming decade. The Low Frequency All Sky Monitor (LoFASM) is a new distributed radio array designed specifically to search for and to study transient radio phenomena in the 5-88 MHz frequency range. LoFASM consists of four stations, each made up of 12 cross dipole-antennas. The stations were constructed by undergraduates at the University of Texas at Brownsville's Center for Advanced Radio Astronomy. LoFASM utilizes the same antennas and front-end electronics developed for the Long Wavelength Array (LWA) project by the Naval Research Laboratory. The stations are located at Port Mansfield, Texas, the LWA North Arm site of the LWA1 Radio Observatory in New Mexico, the Green Bank Radio Observatory, West Virginia, and NASA's Goldstone tracking center in California. Having the stations in these geographically distinct regions allows for the immediate discrimination between bonafide astronomical transient events and radio frequency interference. In this presentation, we will give an overview of LoFASM's design and capabilities as well as the project's primary scientific objectives

Jenet, Fredrick; Cohen, S.; Dartez, L. P.; Ford, A.; Garcia, A.; Hinojosa, J.; Longoria, C.; Lunsford, G.; Mata, A.; Miller, R. B.; Reser, J.; Rivera, J.; Stovall, K.; Creighton, T. D.; Hicks, B.; Price, R. H.; Taylor, G. B.

2013-01-01

427

Interstellar Radio Communication and the Frequency Selection Problem  

Microsoft Academic Search

THE largest microwave radio telescope on Earth, at the Arecibo Observatory of the National Astronomy and Ionosphere Center, will soon have the capability of communicating with an identical radio telescope, if such exists, anywhere in the Galaxy. But such communication assumes some previous agreement between the transmitting and receiving civilizations, or mutual discovery of the chosen radio frequency, bandpass, information

F. D. Drake; Carl Sagan

1973-01-01

428

Radio Interferometry & The Measurement Equation -1 School of Physics  

E-print Network

Radio Interferometry & The Measurement Equation - 1 School of Physics and Astronomy An Introduction to Radio Interferometry and The Measurement Equation Formalism Pedagogical Seminar Louise M. Ker March 2010 Abstract The next generation of radio telescopes, such as LOFAR, e-Merlin, ASKAP, MeerKat and even- tually

Tittley, Eric

429

Introductory Astronomy Clearinghouse Labs  

NSDL National Science Digital Library

This website from the University of Washington Department of Astronomy provides introductory astronomy activities on topics such as: fundamentals of astronomy, observing the sky, the sun, stars, stellar evolution, the H-R diagram, the Milky Way Galaxy, galaxies, and cosmology. Printable laboratory guides are available for download in Microsoft Word format.

2010-11-18

430

Discovering Astronomy Through Poetry  

Microsoft Academic Search

The literature is replete with astronomical references. And much of that literature is poetry. Using this fact, not only can the teacher infuse a new appreciation of astronomy, but also, the student has the opportunity to rediscover history through astronomy. Poetry can be an effective icebreaker in the introduction of new topics in physics and astronomy, as well as a

John C. Mannone

2011-01-01

431

Trends in Space Astronomy and Cosmic Vision 2015-2025  

E-print Network

As a short introduction to the astronomy session, the response of the community to the Call for Themes issued by ESA and the specific themes selected by the Astronomy Working Group are briefly presented in connection with the four grand themes finally selected for the ESA Science Programme. They are placed in the context of the main discoveries of the past decade and the astronomy projects currently in their development or definition phase. Finally, possible strategies for their implementation are summarised.

Catherine Turon; Chris Done; Andreas Quirrenbach; Peter Schneider; Conny Aerts; Angela Bazzano; Jose Cernicharo; Paolo De Bernardis; Ariel Goobar; Thomas Henning; Rob J. Ivison; Jean-Paul Kneib; Evert Meurs; Michiel Van Der Klis; Pedro Viana; Sergio Volonte; Werner W. Zeilinger

2005-10-28

432

Revisiting the spread spectrum effect in radio interferometric imaging: a sparse variant of the w-projection algorithm  

NASA Astrophysics Data System (ADS)

Next-generation radio interferometric telescopes will exhibit non-coplanar baseline configurations and wide field of views, inducing a w-modulation of the sky image, which induces the spread spectrum effect. We revisit the impact of this effect on the imaging quality and study a new algorithmic strategy to deal with the associated operator. In previous studies, it has been shown that image recovery in the framework of compressed sensing is improved due to this effect, where the w-modulation can increase the incoherence between measurement and sparsifying signal representations. For the purpose of computational efficiency, idealized experiments with a constant baseline component w were performed. We extend this analysis to the more realistic setting where the w-component varies for each visibility measurement. First, incorporating varying w-components into imaging algorithms is a computational demanding task. We propose a variant of the w-projection algorithm, which is based on an adaptive sparsification procedure, and incorporate it in compressed sensing imaging methods. Secondly, we show that for varying w-components, the reconstruction quality is significantly improved compared to no w-modulation, reaching levels comparable to a constant, maximal w-component. This finding confirms that one may seek to optimize future telescope configurations to promote large w-components, thus enhancing the fidelity of image reconstruction.

Wolz, L.; McEwen, J. D.; Abdalla, F. B.; Carrillo, R. E.; Wiaux, Y.

2013-12-01

433

Distant FR I radio galaxies in the Hubble Deep Field: implications for the cosmological evolution of radio-loud AGN  

E-print Network

Distant FR I radio galaxies in the Hubble Deep Field: implications for the cosmological evolution of radio-loud AGN I. A. G. SnellenP and P. N. Best Institute for Astronomy, Royal Observatory, Blackford S T R AC T Deep and high-resolution radio observations of the Hubble Deep Field and flanking fields have

Best, Philip

434

Music and Astronomy Under the Stars  

NASA Astrophysics Data System (ADS)

Bring telescope to where the people are! Music and Astronomy Under the Stars is a public astronomy outreach program at community parks during and after free summer music concerts and outdoor movie nights. This project also includes daytime activities because there are some afternoon concerts and daylight children's concerts, and observations using remotely operated telescopes in cloudy weather. While there have been many astronomy outreach activities and telescope observations at city sidewalks and parks, this program targets a completely different audience---music lovers who are attending free summer concerts held in community parks. The music lovers who may never have visited a science museum, planetarium, or star party will be exposed to telescope observations and astronomy information with no additional travel costs. This program will permit the entire community to participate in telescope observations and view astronomical video information to enhance the public appreciation of astronomy. This program will also reach underrepresented and underserved groups (women, minorities, older adults). The population base for the initial target audience (Nassau and Suffolk Counties, New York) is 2,500,000. My partners are the Amateur Observers' Society of New York (AOS) and the Towns of Oyster Bay, Hempstead, North Hempstead, and Huntington. Music and Astronomy Under the Stars is program that should continue beyond the International Year of Astronomy 2009 (IYA2009) and can be expanded into a national program.

Lubowich, D.

2008-11-01

435

Dark Skies Awareness Programs for the International Year of Astronomy  

NASA Astrophysics Data System (ADS)

The arc of the Milky Way seen from a truly dark location is part of our planet's cultural and natural heritage. More than 1/5 of the world population, 2/3 of the United States population and 1/2 of the European Union population have already lost naked-eye visibility of the Milky Way. This loss, caused by light pollution, is a serious and growing issue that impacts astronomical research, the economy, ecology, energy conservation, human health, public safety and our shared ability to see the night sky. For this reason, "Dark Skies” is a cornerstone project of the International Year of Astronomy. Its goal is to raise public awareness of the impact of artificial lighting on local environments by getting people worldwide involved in a variety of programs that: 1) Teach about dark skies using new technology (e.g., an activity-based planetarium show on DVD, podcasting, social networking on Facebook and MySpace, a Second Life presence) 2) Provide thematic events on light pollution at star parties and observatory open houses (Dark Skies Discovery Sites, Nights in the (National) Parks, Sidewalk Astronomy) 3) Organize events in the arts (e.g., a photography contest) 4) Involve citizen-scientists in naked-eye and digital-meter star hunting programs (e.g., GLOBE at Night, "How Many Stars?", the Great World Wide Star Count and the radio frequency interference equivalent: "Quiet Skies") and 5) Raise awareness about the link between light pollution and public health, economic issues, ecological consequences, energy conservation, safety and security, and astronomy (e.g., The Starlight Initiative, World Night in Defense of Starlight, International Dark Sky Week, International Dark-Sky Communities, Earth Hour, The Great Switch Out, a traveling exhibit, downloadable posters and brochures). The poster will provide an update, describe how people can continue to participate, and take a look ahead at the program's sustainability. For more information, visit www.darkskiesawareness.org.

Walker, Constance E.; US IYA Dark Skies Working Group

2009-05-01

436

Author (s): NATIONAL RADIO ASTRONOMY OBSERVATORY  

E-print Network

/C card is shown in Figure 1 below. AKAN. Nitat 0 -> S/H AlD ECT () P/O SMD854 P/0 SMD854 HI/LD SE control circuit would latch in the base address bits (ADDRO-ADDR2) instead of the higher address bits (ODR, there is appreciable discharge of the 5000 pF capacitor. The time constant is around 8 ps. The test I made on the op

Groppi, Christopher

437

CROSSCORRELATION SPECTROPOLARIMETRY IN SINGLEDISH RADIO ASTRONOMY  

E-print Network

of the received linear polarization. Stokes V defines the circular polarization: V = i LCP \\Gamma i RCP . Here we follow the IEEE definition for circular polarization; LCP means left­hand­circular polarization. LCP anticlockwise. From the receiver, LCP appears to rotate clockwise. Generally in this paper we follow Tinbergen

Heiles, Carl

438

NATIONAL RADIO ASTRONOMY OBSERVATORY Charlottesville, Virginia  

E-print Network

the two calculator. keys FMT, GO TO, starting the card-reader motor. To load a card, insert.it into the upper slot of the card reader, oriented with the_card-,side to.be used _pointing _downward. Load, first, sides one and two of the program card, then sides three and four of the constant card. The card-reader

Groppi, Christopher

439

NATIONAL RADIO ASTRONOMY OBSERVATORY CHARLOTTESVILLE, VIRGINIA  

E-print Network

· ·· · · · III. Configuration and Location of the Receiver RF Components . . . . . 11 IV. Vacuum System . · · · · · · · · · · · · · · · · · · . · · · · 31 Figures Figure 1 View of Interior of Dewar . . . . · · . · · · · · . . . 4 Figure 2 Cross Section Through Dewar and Tank Assembly . . . . . . 5 Figure 3 Cross Section Through Mixer Mounting Structure

Groppi, Christopher

440

NATIONAL RADIO ASTRONOMY OBSERVATORY CHARLOTTESVILLE, VIRGINIA  

E-print Network

of the system and recommendations for completion of the system are included. The test set is to be used of the mixer. II. General Layout of the System The system consists of three sections (Figure #1). The first of the photodetectors. The cold load is in a styrofoam dewar with a plastic lining to prevent leakage. It contains

Groppi, Christopher

441

NATIONAL RADIO ASTRONOMY OBSERVATORY SOCORRO, NEW MEXICO  

E-print Network

stress is significantly elevated. One way to reduce this stress concentration is to reduce the center reduces the stress riser at the shoulder fillet by making the diameter transition much more gradual. The finite element analysis result shown in Figure 1 verifies that the new axle design reduces the stress

Groppi, Christopher

442

NATIONAL RADIO ASTRONOMY OBSERVATORY Charlottesville, Virginia  

E-print Network

at present: electroplating gold, copper, nickel, chromium, tin; immersion plating · zinc; electropolishing) Stannate alkaline tinplate modified with bismuth addition5 Electropolishing is performed in a bath

Groppi, Christopher

443

NATIONAL RADIO ASTRONOMY OBSERVATORY Charlottesville, Virginia 22903  

E-print Network

bandwidth is examined for three circuits: (i) parallel RC, (ii) parallel RC with series L, and (iii be well described by the parallel RC circuit shown in Fig. 1(a). This is true of Schottky diodes and SIS) parallel RCL with series L. The broadband matching theories of Bode (1945) and Fano (1950) are used

Groppi, Christopher

444

NATIONAL RADIO ASTRONOMY OBSERVATORY Charlottesville, Virginia  

E-print Network

was 180 OPTION BASE 1 185 COM Zo,F,Dat(51,18),INTEGER Nogo,Count 190 Farstart 195 END When COMPILEd with SOURCE OFF, it read 185 COM Zo,F,Dat(51,18),INTEGER Nogo,Count 190 Farstart 195 end and when UNCOMPILEd, it then read 185 COM Zo,F,Dat(51,18),INTEGER Nogo,Count 190 Farstart 195 END Rerunning FARANT after

Groppi, Christopher

445

NATIONAL RADIO ASTRONOMY OBSERVATORY CHARLOTTESVILLE, VIRGINIA  

E-print Network

. Symmetrical square- wave bias of the junction, use of a cryogenic transformer, balanced-bridge techniques sensitivity, AT (which is proportional to minimum detectable flux, Smin = 2kAT/nA) gives: 2NEP ATd - \\ 2 kB 2 bandwidth. The 2 factor in the numerator is due to switching. Using values of Tm , Bm , and Bd for present

Groppi, Christopher

446

(Astro)Physics 343 Observational Radio Astronomy  

E-print Network

, cosmic microwave background #12; Labs Six labs planned, of which at least four will use the Small: measuring the Milky Way's rotation curve #5: millimeter interferometry of an external galaxy #6: class visit grains that glow because they're warm + ionized plasmas that glow because they're warm, or because

Baker, Andrew J.

447

National Radio Astronomy Observatory Green Bank, WV  

E-print Network

.....................................................7 Figure 5: Comparison radiometer and test setup...........................................10 Figure 7: Reference load connected to radiometer. ...........................................................11 Figure 8: LNA input port connected to radiometer. ...............................................

Groppi, Christopher

448

NATIONAL RADIO ASTRONOMY OBSERVATORY Charlottesville, Virginia  

E-print Network

to the cold plate of the refrigerator, and the other end to a heater resistor. Temperature sensors were. 2. Location of heater resistor and temperature sensors when measuring the thermal resistance/32" sheet stock: Unannealed. Annealed. This specimen was annealed at 550EC for 3.5 hours in a nitrogen

Groppi, Christopher

449

NATIONAL RADIO ASTRONOMY OBSERVATORY Charlottesville, Virginia  

E-print Network

with a sensitivity of ~10-10 std. cc/sec indicated no measurable leak at the metal to G-10 O-ring seals failures in the CDL "rocket" test receiver. Two concerns about these helium line isolators are helium

Groppi, Christopher

450

NATIONAL RADIO ASTRONOMY OBSERVATORY Charlottesville, Virginia 22901  

E-print Network

Description of Control System ........................................................... .........2 4. 0. eLoadiWind Torque for Closed Position Loop 16. Tachometer Buffer 17. Control Circuits 18. Elevation Report No. 127 THE 45-FOOT ANTENNA DRIVE SYSTEM John M. Payne MARCH 1973 NUMBER OF COPIES: 150 #12;THE 45

Groppi, Christopher

451

Interference Mitigation In Radio Astronomy and  

E-print Network

protected world-wide by ITU regulation GLONASS ­ The Russian Version of the US Global Position System (GPS temperatures infer ocean salinity, soil moisture, ... · AND this entire band is allocated primarily to aviation ocean salinity, soil moisture, ... · AND this entire band is allocated primarily to aviation radars

Ellingson, Steven W.

452

Network for Astronomy School Education  

NASA Astrophysics Data System (ADS)

The Network for Astronomy School Education Project (NASE) was developed in response to the IAU's most recent 10 Years Strategic Plan to increase the efforts of the IAU in schools. NASE's mission is to stimulate teaching astronomy in schools, through professional development of primary and secondary school science teachers in developing and emerging countries. NASE's organizational principle is to build capacity by providing courses for three years in cooperation with a Local Organizing Committee (Local NASE Group). The Local NASE Group consists of 6-8 local university professors and education professional who will promote astronomy activities and organize future courses in subsequent years in their region of their country. NASE philosophy is to introduce low-tech astronomy, and has thus developed an a suite of activities that can be carried out with inexpensive, quotidian materials. Supporting these activities is a text for teachers, plus a complete set of instructional materials for each topic. These materials are available in English and Spanish, with future editions available in Chinese and Portuguese. We describe and discuss NASE activities in Central and South America from 2009 to the present.

Deustua, Susana E.; Ros, R. M.; Garcia, B.

2014-01-01

453

eRadio : empowerment through community Web radio  

E-print Network

The eRadio project proposes to be an effective aid to increase interaction and reduce alienation among the members of dispersed communities by using a holistic approach to participatory and interactive web radio-production, ...

Gomez-Monroy, Carla, 1977-

2004-01-01

454

Using large radio telescopes at decametre wavelengths  

Microsoft Academic Search

With the aim of evaluating the actual possibilities of doing, from the ground, sensitive radio astronomy at decametre wavelengths (particularly below ?50MHz), an extensive program of radio observations was carried out, in 1999–2002, by using digital spectral and waveform analysers (DSP) of new generation, connected to several of the largest, decametre radio telescopes in the world (i.e., the UTR-2 and

A. Lecacheux; A. A. Konovalenko; H. O. Rucker

2004-01-01

455

Astronomy and Politics  

NASA Astrophysics Data System (ADS)

The relationship between astronomy and politics is a complex but important part of understanding the practice of astronomy throughout history. This chapter explores some of the ways that astronomy, astrology, and politics have interacted, placing particular focus on the way that astronomy and astrology have been used for political purposes by both people in power and people who wish to influence a ruler's policy. Also discussed are the effects that politics has had on the development of astronomy and, in particular, upon the recording and preservation of astronomical knowledge.

Steele, John M.

456

Radio Science in Africa  

NASA Astrophysics Data System (ADS)

Radio science activities covered by URSI (International Radio Science Union) are briefly reviewed. They encompass the knowledge and study of all aspects of electromagnetic fields and waves in a wide frequency range running from micro pulsation frequencies (i.e. from ~1 mHz) to Terahertz. The topics include: electromagnetic measurements and standards, electromagnetic theory and applications, radio-communication systems and signal processing, electronics and Photonics, electromagnetic environment and interference, wave propagation and remote sensing, ionospheric radio and propagation, waves in plasmas, radio astronomy, and electromagnetics in biology and medicine. The main radio science activities conducted by the URSI national Committees of South Africa, Egypt and Nigeria, and by African radio scientists groups gathered in GIRGEA (Groupe International de Recherche en Géophysique Europe Afrique) are reviewed. The emphasis is put on the activities developed in the context of the IHY programme and of the SCINDA network for forecasting ionospheric irregularities that adversely impact communication and navigation systems in the low latitude regions.

Lefeuvre, Francois; Mc Kinnel, Lee-Anne; Chukwuma, Victor; Amory-Mazaudier, Christine

2010-05-01