47 CFR 73.6016 - Digital Class A TV station protection of TV broadcast stations.

Code of Federal Regulations, 2011 CFR

2011-10-01

... 47 Telecommunication 4 2011-10-01 2011-10-01 false Digital Class A TV station protection of TV...) BROADCAST RADIO SERVICES RADIO BROADCAST SERVICES Class A Television Broadcast Stations § 73.6016 Digital Class A TV station protection of TV broadcast stations. Digital Class A TV stations must protect...

47 CFR 73.6016 - Digital Class A TV station protection of TV broadcast stations.

Code of Federal Regulations, 2010 CFR

2010-10-01

... 47 Telecommunication 4 2010-10-01 2010-10-01 false Digital Class A TV station protection of TV...) BROADCAST RADIO SERVICES RADIO BROADCAST SERVICES Class A Television Broadcast Stations § 73.6016 Digital Class A TV station protection of TV broadcast stations. Digital Class A TV stations must protect...

47 CFR 73.6019 - Digital Class A TV station protection of low power TV, TV translator, digital low power TV and...

Code of Federal Regulations, 2011 CFR

2011-10-01

... 47 Telecommunication 4 2011-10-01 2011-10-01 false Digital Class A TV station protection of low power TV, TV translator, digital low power TV and digital TV translator stations. 73.6019 Section 73... BROADCAST SERVICES Class A Television Broadcast Stations § 73.6019 Digital Class A TV station protection of...

47 CFR 73.6018 - Digital Class A TV station protection of DTV stations.

Code of Federal Regulations, 2011 CFR

2011-10-01

... 47 Telecommunication 4 2011-10-01 2011-10-01 false Digital Class A TV station protection of DTV... RADIO SERVICES RADIO BROADCAST SERVICES Class A Television Broadcast Stations § 73.6018 Digital Class A TV station protection of DTV stations. Digital Class A TV stations must protect the DTV service that...

47 CFR 73.6018 - Digital Class A TV station protection of DTV stations.

Code of Federal Regulations, 2010 CFR

2010-10-01

... 47 Telecommunication 4 2010-10-01 2010-10-01 false Digital Class A TV station protection of DTV... RADIO SERVICES RADIO BROADCAST SERVICES Class A Television Broadcast Stations § 73.6018 Digital Class A TV station protection of DTV stations. Digital Class A TV stations must protect the DTV service that...

Study of stability and control moment gyro wobble damping of flexible, spinning space stations

NASA Technical Reports Server (NTRS)

Berman, H.; Markowitz, J.; Holmer, W.

1972-01-01

An executive summary and an analysis of the results are discussed. A user's guide for the digital computer program that simulates the flexible, spinning space station is presented. Control analysis activities and derivation of dynamic equations of motion and the modal analysis are also cited.

A miniaturized digital telemetry system for physiological data transmission

NASA Technical Reports Server (NTRS)

Portnoy, W. M.; Stotts, L. J.

1978-01-01

A physiological date telemetry system, consisting basically of a portable unit and a ground base station was designed, built, and tested. The portable unit to be worn by the subject is composed of a single crystal controlled transmitter with AM transmission of digital data and narrowband FM transmission of voice; a crystal controlled FM receiver; thirteen input channels follwed by a PCM encoder (three of these channels are designed for ECG data); a calibration unit; and a transponder control system. The ground base station consists of a standard telemetry reciever, a decoder, and an FM transmitter for transmission of voice and transponder signals to the portable unit. The ground base station has complete control of power to all subsystems in the portable unit. The phase-locked loop circuit which is used to decode the data, remains in operation even when the signal from the portable unit is interrupted.

Use of small stand-alone Internet nodes as a distributed control system

NASA Astrophysics Data System (ADS)

Goodwin, Robert W.; Kucera, Michael J.; Shea, Michael F.

1994-12-01

For several years, the standard model for accelerator control systems has been workstation consoles connected to VME local stations by a Local Area Network with analog and digital data being accessed via a field bus to custom I/O interface electronics. Commercially available hardware has now made it possible to implement a small stand-alone data acquisition station that combines the LAN connection, the computer, and the analog and digital I/O interface on a single board. This eliminates the complexity of a field bus and the associated proprietary I/O hardware. A minimum control system is one data acquisition station and a Macintosh or workstation console, both connected to the network; larger systems have more consoles and nodes. An implementation of this architecture is described along with performance and operational experience.

47 CFR 74.793 - Digital low power TV and TV translator station protection of broadcast stations.

Code of Federal Regulations, 2010 CFR

2010-10-01

... 47 Telecommunication 4 2010-10-01 2010-10-01 false Digital low power TV and TV translator station... DISTRIBUTIONAL SERVICES Low Power TV, TV Translator, and TV Booster Stations § 74.793 Digital low power TV and TV translator station protection of broadcast stations. (a) An application to construct a new digital low power...

7 CFR 1740.1 - Purpose.

Code of Federal Regulations, 2011 CFR

2011-01-01

... PUBLIC TELEVISION STATION DIGITAL TRANSITION GRANT PROGRAM Public Television Station Digital Transition... Station Digital Transition Grant Program (Grant Program) is to enable public television stations serving rural areas to transition from broadcasting in analog to digital, as required under the Federal...

7 CFR 1740.1 - Purpose.

Code of Federal Regulations, 2010 CFR

2010-01-01

... PUBLIC TELEVISION STATION DIGITAL TRANSITION GRANT PROGRAM Public Television Station Digital Transition... Station Digital Transition Grant Program (Grant Program) is to enable public television stations serving rural areas to transition from broadcasting in analog to digital, as required under the Federal...

76 FR 11680 - Digital Low Power Television, Television Translator, and Television Booster Stations and Digital...

Federal Register 2010, 2011, 2012, 2013, 2014

2011-03-03

...] Digital Low Power Television, Television Translator, and Television Booster Stations and Digital Class A... Commission's Rules to Establish Rules for Digital Low Power, Television Translator, and Television Booster... Digital Low Power Television Translator, Television Booster Stations, and to Amend Rules for Digital Class...

47 CFR 73.6019 - Digital Class A TV station protection of low power TV, TV translator, digital low power TV and...

Code of Federal Regulations, 2010 CFR

2010-10-01

... power TV, TV translator, digital low power TV and digital TV translator stations. 73.6019 Section 73... low power TV, TV translator, digital low power TV and digital TV translator stations. An application... A TV station will not be accepted if it fails to protect authorized low power TV, TV translator...

Newly Digitized Historical Climate Data of the German Bight and the Southern Baltic Sea Coasts

NASA Astrophysics Data System (ADS)

Röhrbein, Dörte; Tinz, Birger; von Storch, Hans

2015-04-01

The detection of historical climate information plays an important role with regard to the discussion on climate change, particularly on storminess. The German Meteorological Service houses huge archives of historical handwritten journals of weather observations. A considerable number of original observation sheets from stations along the coast of the German Bight and the southern Baltic Sea exists which has been until recently almost unnoticed. These stations are called signal stations and are positioned close to the shore. However, for this region meteorological observation data of 128 stations exist from 1877 to 1999 and are partly digitized. In this study we show an analysis of firstly newly digitized wind and surface air pressure data of 15 stations from 1877 to 1939 and we also present a case study of the storm surge at the coast of the southern Baltic Sea in December 1913. The data are quality controlled by formal, climatological, temporal and consistency checks. It is shown that these historical climate data are usable in consistency and quality for further investigations on climate change, e.g. as input for regional and global reanalysis.

47 CFR 73.6014 - Protection of digital Class A TV stations.

Code of Federal Regulations, 2011 CFR

2011-10-01

... 47 Telecommunication 4 2011-10-01 2011-10-01 false Protection of digital Class A TV stations. 73... SERVICES RADIO BROADCAST SERVICES Class A Television Broadcast Stations § 73.6014 Protection of digital... be accepted if it fails to protect authorized digital Class A TV stations and applications for...

47 CFR 73.6014 - Protection of digital Class A TV stations.

Code of Federal Regulations, 2010 CFR

2010-10-01

... 47 Telecommunication 4 2010-10-01 2010-10-01 false Protection of digital Class A TV stations. 73... SERVICES RADIO BROADCAST SERVICES Class A Television Broadcast Stations § 73.6014 Protection of digital... be accepted if it fails to protect authorized digital Class A TV stations and applications for...

47 CFR 74.791 - Digital call signs.

Code of Federal Regulations, 2013 CFR

2013-10-01

... Booster Stations § 74.791 Digital call signs. (a) Digital low power stations. Call signs for digital low power stations will be made up of a prefix consisting of the initial letter K or W followed by the channel number assigned to the station and two additional letters and a suffix consisting of the letters...

47 CFR 74.791 - Digital call signs.

Code of Federal Regulations, 2011 CFR

2011-10-01

... Booster Stations § 74.791 Digital call signs. (a) Digital low power stations. Call signs for digital low power stations will be made up of a prefix consisting of the initial letter K or W followed by the channel number assigned to the station and two additional letters and a suffix consisting of the letters...

47 CFR 74.791 - Digital call signs.

Code of Federal Regulations, 2012 CFR

2012-10-01

... Booster Stations § 74.791 Digital call signs. (a) Digital low power stations. Call signs for digital low power stations will be made up of a prefix consisting of the initial letter K or W followed by the channel number assigned to the station and two additional letters and a suffix consisting of the letters...

47 CFR 74.791 - Digital call signs.

Code of Federal Regulations, 2014 CFR

2014-10-01

... Booster Stations § 74.791 Digital call signs. (a) Digital low power stations. Call signs for digital low power stations will be made up of a prefix consisting of the initial letter K or W followed by the channel number assigned to the station and two additional letters and a suffix consisting of the letters...

State-space self-tuner for on-line adaptive control

NASA Technical Reports Server (NTRS)

Shieh, L. S.

1994-01-01

Dynamic systems, such as flight vehicles, satellites and space stations, operating in real environments, constantly face parameter and/or structural variations owing to nonlinear behavior of actuators, failure of sensors, changes in operating conditions, disturbances acting on the system, etc. In the past three decades, adaptive control has been shown to be effective in dealing with dynamic systems in the presence of parameter uncertainties, structural perturbations, random disturbances and environmental variations. Among the existing adaptive control methodologies, the state-space self-tuning control methods, initially proposed by us, are shown to be effective in designing advanced adaptive controllers for multivariable systems. In our approaches, we have embedded the standard Kalman state-estimation algorithm into an online parameter estimation algorithm. Thus, the advanced state-feedback controllers can be easily established for digital adaptive control of continuous-time stochastic multivariable systems. A state-space self-tuner for a general multivariable stochastic system has been developed and successfully applied to the space station for on-line adaptive control. Also, a technique for multistage design of an optimal momentum management controller for the space station has been developed and reported in. Moreover, we have successfully developed various digital redesign techniques which can convert a continuous-time controller to an equivalent digital controller. As a result, the expensive and unreliable continuous-time controller can be implemented using low-cost and high performance microprocessors. Recently, we have developed a new hybrid state-space self tuner using a new dual-rate sampling scheme for on-line adaptive control of continuous-time uncertain systems.

47 CFR 74.792 - Digital low power TV and TV translator station protected contour.

Code of Federal Regulations, 2010 CFR

2010-10-01

... 47 Telecommunication 4 2010-10-01 2010-10-01 false Digital low power TV and TV translator station... SERVICES Low Power TV, TV Translator, and TV Booster Stations § 74.792 Digital low power TV and TV translator station protected contour. (a) A digital low power TV or TV translator will be protected from...

Proposed Construction of Boulder Seismic Station Monitoring Sites, Boulder, Wyoming. Environmental Assessment

DTIC Science & Technology

2009-02-01

power battery box and controllers, WiFi radio, network switch, vault seismometers, infrasonic digitizers, and excess cabling. In addition to the...installed around the boreholes. Immediately upon completion, each site will be cleared of all unused equipment, debris, materials, and trash . All...controllers, WiFi radio, network switch, vault seismometers, infrasonic digitizers, and excess cabling. In addition to the permanent infrastructure listed

New design conception and development of the synchronizer/data buffer system in CDA station for China's GMS

NASA Astrophysics Data System (ADS)

Tong, Kai; Fan, Shiming; Gong, Derong; Lu, Zuming; Liu, Jian

The synchronizer/data buffer (SDB) in the command and data acquisition station for China's future Geostationary Meteorological Satellite is described. Several computers and special microprocessors are used in tandem with minimized hardware to fulfill all of the functions. The high-accuracy digital phase locked loop is operated by computer and by controlling the count value of the 20-MHz clock to acquire and track such signals as sun pulse, scan synchronization detection pulse, and earth pulse. Sun pulse and VISSR data are recorded precisely and economically by digitizing the time relation. The VISSR scan timing and equiangular control timing, and equal time sampling on satellite are also discussed.

Imaging Total Stations - Modular and Integrated Concepts

NASA Astrophysics Data System (ADS)

Hauth, Stefan; Schlüter, Martin

2010-05-01

Keywords: 3D-Metrology, Engineering Geodesy, Digital Image Processing Initialized in 2009, the Institute for Spatial Information and Surveying Technology i3mainz, Mainz University of Applied Sciences, forces research towards modular concepts for imaging total stations. On the one hand, this research is driven by the successful setup of high precision imaging motor theodolites in the near past, on the other hand it is pushed by the actual introduction of integrated imaging total stations to the positioning market by the manufacturers Topcon and Trimble. Modular concepts for imaging total stations are manufacturer independent to a large extent and consist of a particular combination of accessory hardware, software and algorithmic procedures. The hardware part consists mainly of an interchangeable eyepiece adapter offering opportunities for digital imaging and motorized focus control. An easy assembly and disassembly in the field is possible allowing the user to switch between the classical and the imaging use of a robotic total station. The software part primarily has to ensure hardware control, but several level of algorithmic support might be added and have to be distinguished. Algorithmic procedures allow to reach several levels of calibration concerning the geometry of the external digital camera and the total station. We deliver insight in our recent developments and quality characteristics. Both the modular and the integrated approach seem to have its individual strengths and weaknesses. Therefore we expect that both approaches might point at different target applications. Our aim is a better understanding of appropriate applications for robotic imaging total stations. First results are presented. Stefan Hauth, Martin Schlüter i3mainz - Institut für Raumbezogene Informations- und Messtechnik FH Mainz University of Applied Sciences Lucy-Hillebrand-Straße 2, 55128 Mainz, Germany

A self-tuning automatic voltage regulator designed for an industrial environment

DOE Office of Scientific and Technical Information (OSTI.GOV)

Flynn, D.; Hogg, B.W.; Swidenbank, E.

Examination of the performance of fixed parameter controllers has resulted in the development of self-tuning strategies for excitation control of turbogenerator systems. In conjunction with the advanced control algorithms, sophisticated measurement techniques have previously been adopted on micromachine systems to provide generator terminal quantities. In power stations, however, a minimalist hardware arrangement would be selected leading to relatively simple measurement techniques. The performance of a range of self-tuning schemes is investigated on an industrial test-bed, employing a typical industrial hardware measurement system. Individual controllers are implemented on a standard digital automatic voltage regulator, as installed in power stations. This employsmore » a VME platform, and the self-tuning algorithms are introduced by linking to a transputer network. The AVR includes all normal features, such as field forcing, VAR limiting and overflux protection. Self-tuning controller performance is compared with that of a fixed gain digital AVR.« less

47 CFR 101.503 - Digital Electronic Message Service Nodal Stations.

Code of Federal Regulations, 2010 CFR

2010-10-01

... 47 Telecommunication 5 2010-10-01 2010-10-01 false Digital Electronic Message Service Nodal... AND SPECIAL RADIO SERVICES FIXED MICROWAVE SERVICES 24 GHz Service and Digital Electronic Message Service § 101.503 Digital Electronic Message Service Nodal Stations. 10.6 GHz DEMS Nodal Stations may be...

47 CFR 74.786 - Digital channel assignments.

Code of Federal Regulations, 2010 CFR

2010-10-01

... Translator, and TV Booster Stations § 74.786 Digital channel assignments. (a) An applicant for a new low power television or television translator digital station or for changes in the facilities of an... VHF digital low power television or television translator station. Channels 5 and 6 assigned in Alaska...

76 FR 72849 - Digital Low Power Television, Television Translator, and Television Booster Stations and To Amend...

Federal Register 2010, 2011, 2012, 2013, 2014

2011-11-28

...] Digital Low Power Television, Television Translator, and Television Booster Stations and To Amend Rules... for Digital Low Power Television, Television Translator, and Television Booster Stations and to Amend... television, TV translator, and Class A television station DTV licensees''). The Commission has also revised...

47 CFR 74.790 - Permissible service of digital TV translator and LPTV stations.

Code of Federal Regulations, 2013 CFR

2013-10-01

...) Digital signal regeneration (i.e., DTV signal demodulation, decoding, error processing, encoding... paragraph (f) of this section, a digital TV translator station may be used only to receive the signals of a... to alter a TV broadcast and/or DTV broadcast signal. (f) A digital TV translator station may transmit...

47 CFR 74.790 - Permissible service of digital TV translator and LPTV stations.

Code of Federal Regulations, 2014 CFR

2014-10-01

...) Digital signal regeneration (i.e., DTV signal demodulation, decoding, error processing, encoding... paragraph (f) of this section, a digital TV translator station may be used only to receive the signals of a... to alter a TV broadcast and/or DTV broadcast signal. (f) A digital TV translator station may transmit...

47 CFR 74.790 - Permissible service of digital TV translator and LPTV stations.

Code of Federal Regulations, 2012 CFR

2012-10-01

...) Digital signal regeneration (i.e., DTV signal demodulation, decoding, error processing, encoding... paragraph (f) of this section, a digital TV translator station may be used only to receive the signals of a... to alter a TV broadcast and/or DTV broadcast signal. (f) A digital TV translator station may transmit...

Helms with laptop in Destiny laboratory module

NASA Image and Video Library

2001-03-30

ISS002-E-5478 (30 March 2001) --- Astronaut Susan J. Helms, Expedition Two flight engineer, works at a laptop computer in the U.S. Laboratory / Destiny module of the International Space Station (ISS). The Space Station Remote Manipulator System (SSRMS) control panel is visible to Helms' right. This image was recorded with a digital still camera.

Automatic Train Operation Using Autonomic Prediction of Train Runs

NASA Astrophysics Data System (ADS)

Asuka, Masashi; Kataoka, Kenji; Komaya, Kiyotoshi; Nishida, Syogo

In this paper, we present an automatic train control method adaptable to disturbed train traffic conditions. The proposed method presumes transmission of detected time of a home track clearance to trains approaching to the station by employing equipment of Digital ATC (Automatic Train Control). Using the information, each train controls its acceleration by the method that consists of two approaches. First, by setting a designated restricted speed, the train controls its running time to arrive at the next station in accordance with predicted delay. Second, the train predicts the time at which it will reach the current braking pattern generated by Digital ATC, along with the time when the braking pattern transits ahead. By comparing them, the train correctly chooses the coasting drive mode in advance to avoid deceleration due to the current braking pattern. We evaluated the effectiveness of the proposed method regarding driving conditions, energy consumption and reduction of delays by simulation.

47 CFR 74.793 - Digital low power TV and TV translator station protection of broadcast stations.

Code of Federal Regulations, 2012 CFR

2012-10-01

... this section, interference prediction analysis is based on the interference thresholds (D/U signal.... Predictions of interference to co-channel DTV broadcast, digital Class A TV, digital LPTV and digital TV....” Predictions of interference to co-channel TV broadcast, Class A TV, LPTV and TV translator stations will be...

47 CFR 74.793 - Digital low power TV and TV translator station protection of broadcast stations.

Code of Federal Regulations, 2014 CFR

2014-10-01

... this section, interference prediction analysis is based on the interference thresholds (D/U signal.... Predictions of interference to co-channel DTV broadcast, digital Class A TV, digital LPTV and digital TV....” Predictions of interference to co-channel TV broadcast, Class A TV, LPTV and TV translator stations will be...

47 CFR 74.793 - Digital low power TV and TV translator station protection of broadcast stations.

Code of Federal Regulations, 2013 CFR

2013-10-01

... this section, interference prediction analysis is based on the interference thresholds (D/U signal.... Predictions of interference to co-channel DTV broadcast, digital Class A TV, digital LPTV and digital TV....” Predictions of interference to co-channel TV broadcast, Class A TV, LPTV and TV translator stations will be...

47 CFR 74.793 - Digital low power TV and TV translator station protection of broadcast stations.

Code of Federal Regulations, 2011 CFR

2011-10-01

... this section, interference prediction analysis is based on the interference thresholds (D/U signal.... Predictions of interference to co-channel DTV broadcast, digital Class A TV, digital LPTV and digital TV....” Predictions of interference to co-channel TV broadcast, Class A TV, LPTV and TV translator stations will be...

47 CFR 74.710 - Digital low power TV and TV translator station protection.

Code of Federal Regulations, 2010 CFR

2010-10-01

... 47 Telecommunication 4 2010-10-01 2010-10-01 false Digital low power TV and TV translator station... SERVICES Low Power TV, TV Translator, and TV Booster Stations § 74.710 Digital low power TV and TV translator station protection. (a) An application to construct a new low power TV, TV translator, or TV...

47 CFR 80.121 - Public coast stations using telegraphy.

Code of Federal Regulations, 2014 CFR

2014-10-01

... use the ship station selective calling number (5 digits) and its assigned coast station identification number (4 digits). Calls to ship stations must employ the following format: Ship station selective call number, repeated twice; “DE”, sent once; and coast station identification number, repeated twice. When...

47 CFR 80.121 - Public coast stations using telegraphy.

Code of Federal Regulations, 2012 CFR

2012-10-01

... use the ship station selective calling number (5 digits) and its assigned coast station identification number (4 digits). Calls to ship stations must employ the following format: Ship station selective call number, repeated twice; “DE”, sent once; and coast station identification number, repeated twice. When...

47 CFR 80.121 - Public coast stations using telegraphy.

Code of Federal Regulations, 2013 CFR

2013-10-01

... use the ship station selective calling number (5 digits) and its assigned coast station identification number (4 digits). Calls to ship stations must employ the following format: Ship station selective call number, repeated twice; “DE”, sent once; and coast station identification number, repeated twice. When...

47 CFR 80.121 - Public coast stations using telegraphy.

Code of Federal Regulations, 2011 CFR

2011-10-01

... use the ship station selective calling number (5 digits) and its assigned coast station identification number (4 digits). Calls to ship stations must employ the following format: Ship station selective call number, repeated twice; “DE”, sent once; and coast station identification number, repeated twice. When...

47 CFR 74.792 - Digital low power TV and TV translator station protected contour.

Code of Federal Regulations, 2013 CFR

2013-10-01

... SERVICES Low Power TV, TV Translator, and TV Booster Stations § 74.792 Digital low power TV and TV... interference from other low power TV, TV translator, Class A TV or TV booster stations or digital low power TV...

47 CFR 74.792 - Digital low power TV and TV translator station protected contour.

Code of Federal Regulations, 2011 CFR

2011-10-01

... SERVICES Low Power TV, TV Translator, and TV Booster Stations § 74.792 Digital low power TV and TV... interference from other low power TV, TV translator, Class A TV or TV booster stations or digital low power TV...

47 CFR 74.792 - Digital low power TV and TV translator station protected contour.

Code of Federal Regulations, 2014 CFR

2014-10-01

... SERVICES Low Power TV, TV Translator, and TV Booster Stations § 74.792 Digital low power TV and TV... interference from other low power TV, TV translator, Class A TV or TV booster stations or digital low power TV...

47 CFR 74.792 - Digital low power TV and TV translator station protected contour.

Code of Federal Regulations, 2012 CFR

2012-10-01

... SERVICES Low Power TV, TV Translator, and TV Booster Stations § 74.792 Digital low power TV and TV... interference from other low power TV, TV translator, Class A TV or TV booster stations or digital low power TV...

47 CFR 11.1 - Purpose.

Code of Federal Regulations, 2011 CFR

2011-10-01

... broadcast stations, digital broadcast stations, analog cable systems, digital cable systems, wireline video systems, wireless cable systems, Direct Broadcast Satellite (DBS) services, Satellite Digital Audio Radio...

76 FR 46292 - Information Collections Being Reviewed by the Federal Communications Commission

Federal Register 2010, 2011, 2012, 2013, 2014

2011-08-02

... Translator, and Television Booster Stations and to Amend Rules for Digital Class A Television Stations, MB... digital broadcasting and states that low power television, TV translator, and Class A television stations... Television, TV Translator and Class A Television Digital Transition Notifications; FCC Form 337. Form Number...

Quest airlock maneuvered into position

NASA Image and Video Library

2001-07-15

STS104-E-5068 (15 July 2001) --- Backdropped against a blue and white Earth, some 237 miles below, the Quest airlock is in the process of being installed onto the starboard side of Unity Node 1 of the International Space Station (ISS). Astronaut Susan J. Helms, Expedition Two flight engineer, used controls onboard the station to maneuver the Airlock into place with the Canadarm2 or Space Station Remote Manipulator System (SSRMS). This image was recorded with a digital still camera.

Integrated dynamic analysis simulation of space stations with controllable solar array

NASA Technical Reports Server (NTRS)

Heinrichs, J. A.; Fee, J. J.

1972-01-01

A methodology is formulated and presented for the integrated structural dynamic analysis of space stations with controllable solar arrays and non-controllable appendages. The structural system flexibility characteristics are considered in the dynamic analysis by a synthesis technique whereby free-free space station modal coordinates and cantilever appendage coordinates are inertially coupled. A digital simulation of this analysis method is described and verified by comparison of interaction load solutions with other methods of solution. Motion equations are simulated for both the zero gravity and artificial gravity (spinning) orbital conditions. Closed loop controlling dynamics for both orientation control of the arrays and attitude control of the space station are provided in the simulation by various generic types of controlling systems. The capability of the simulation as a design tool is demonstrated by utilizing typical space station and solar array structural representations and a specific structural perturbing force. Response and interaction load solutions are presented for this structural configuration and indicate the importance of using an integrated type analysis for the predictions of structural interactions.

7 CFR 1740.2 - Definitions.

Code of Federal Regulations, 2011 CFR

2011-01-01

.... Distance learning means any digital public television broadcast to a school, library, home, or other end... PUBLIC TELEVISION STATION DIGITAL TRANSITION GRANT PROGRAM Public Television Station Digital Transition... 75% covered, by a digital television transmitter or translator. Coverage contour area is the area...

7 CFR 1740.2 - Definitions.

Code of Federal Regulations, 2013 CFR

2013-01-01

.... Distance learning means any digital public television broadcast to a school, library, home, or other end... PUBLIC TELEVISION STATION DIGITAL TRANSITION GRANT PROGRAM Public Television Station Digital Transition... 75% covered, by a digital television transmitter or translator. Coverage contour area is the area...

7 CFR 1740.2 - Definitions.

Code of Federal Regulations, 2012 CFR

2012-01-01

.... Distance learning means any digital public television broadcast to a school, library, home, or other end... PUBLIC TELEVISION STATION DIGITAL TRANSITION GRANT PROGRAM Public Television Station Digital Transition... 75% covered, by a digital television transmitter or translator. Coverage contour area is the area...

7 CFR 1740.2 - Definitions.

Code of Federal Regulations, 2014 CFR

2014-01-01

.... Distance learning means any digital public television broadcast to a school, library, home, or other end... PUBLIC TELEVISION STATION DIGITAL TRANSITION GRANT PROGRAM Public Television Station Digital Transition... 75% covered, by a digital television transmitter or translator. Coverage contour area is the area...

7 CFR 1740.2 - Definitions.

Code of Federal Regulations, 2010 CFR

2010-01-01

.... Distance learning means any digital public television broadcast to a school, library, home, or other end... PUBLIC TELEVISION STATION DIGITAL TRANSITION GRANT PROGRAM Public Television Station Digital Transition... 75% covered, by a digital television transmitter or translator. Coverage contour area is the area...

76 FR 44821 - Digital Low Power Television, Television Translator, and Television Booster Stations and To Amend...

Federal Register 2010, 2011, 2012, 2013, 2014

2011-07-27

...] Digital Low Power Television, Television Translator, and Television Booster Stations and To Amend Rules... this proceeding in order to allow a timely and successful completion of the low power television digital transition. Although Congress established a hard deadline of June 12, 2009 for full power stations...

37 CFR 258.4 - Royalty fee for secondary transmission of digital signals of broadcast stations by satellite...

Code of Federal Regulations, 2012 CFR

2012-07-01

... transmission of digital signals of broadcast stations by satellite carriers. 258.4 Section 258.4 Patents, Trademarks, and Copyrights COPYRIGHT OFFICE, LIBRARY OF CONGRESS COPYRIGHT ARBITRATION ROYALTY PANEL RULES... Royalty fee for secondary transmission of digital signals of broadcast stations by satellite carriers. (a...

37 CFR 258.4 - Royalty fee for secondary transmission of digital signals of broadcast stations by satellite...

Code of Federal Regulations, 2013 CFR

2013-07-01

... transmission of digital signals of broadcast stations by satellite carriers. 258.4 Section 258.4 Patents, Trademarks, and Copyrights COPYRIGHT OFFICE, LIBRARY OF CONGRESS COPYRIGHT ARBITRATION ROYALTY PANEL RULES... Royalty fee for secondary transmission of digital signals of broadcast stations by satellite carriers. (a...

37 CFR 258.4 - Royalty fee for secondary transmission of digital signals of broadcast stations by satellite...

Code of Federal Regulations, 2011 CFR

2011-07-01

... transmission of digital signals of broadcast stations by satellite carriers. 258.4 Section 258.4 Patents, Trademarks, and Copyrights COPYRIGHT OFFICE, LIBRARY OF CONGRESS COPYRIGHT ARBITRATION ROYALTY PANEL RULES... Royalty fee for secondary transmission of digital signals of broadcast stations by satellite carriers. (a...

37 CFR 258.4 - Royalty fee for secondary transmission of digital signals of broadcast stations by satellite...

Code of Federal Regulations, 2014 CFR

2014-07-01

... transmission of digital signals of broadcast stations by satellite carriers. 258.4 Section 258.4 Patents, Trademarks, and Copyrights U.S. COPYRIGHT OFFICE, LIBRARY OF CONGRESS COPYRIGHT ARBITRATION ROYALTY PANEL... Royalty fee for secondary transmission of digital signals of broadcast stations by satellite carriers. (a...

37 CFR 258.4 - Royalty fee for secondary transmission of digital signals of broadcast stations by satellite...

Code of Federal Regulations, 2010 CFR

2010-07-01

... transmission of digital signals of broadcast stations by satellite carriers. 258.4 Section 258.4 Patents, Trademarks, and Copyrights COPYRIGHT OFFICE, LIBRARY OF CONGRESS COPYRIGHT ARBITRATION ROYALTY PANEL RULES... Royalty fee for secondary transmission of digital signals of broadcast stations by satellite carriers. (a...

47 CFR 74.791 - Digital call signs.

Code of Federal Regulations, 2010 CFR

2010-10-01

..., AUXILIARY, SPECIAL BROADCAST AND OTHER PROGRAM DISTRIBUTIONAL SERVICES Low Power TV, TV Translator, and TV... −D. (b) Digital television translator stations. Call signs for digital television translator stations...

Short-term exposure to mobile phone base station signals does not affect cognitive functioning or physiological measures in individuals who report sensitivity to electromagnetic fields and controls.

PubMed

Eltiti, Stacy; Wallace, Denise; Ridgewell, Anna; Zougkou, Konstantina; Russo, Riccardo; Sepulveda, Francisco; Fox, Elaine

2009-10-01

Individuals who report sensitivity to electromagnetic fields often report cognitive impairments that they believe are due to exposure to mobile phone technology. Previous research in this area has revealed mixed results, however, with the majority of research only testing control individuals. Two studies using control and self-reported sensitive participants found inconsistent effects of mobile phone base stations on cognitive functioning. The aim of the present study was to clarify whether short-term (50 min) exposure at 10 mW/m(2) to typical Global System for Mobile Communication (GSM) and Universal Mobile Telecommunications System (UMTS) base station signals affects attention, memory, and physiological endpoints in sensitive and control participants. Data from 44 sensitive and 44 matched-control participants who performed the digit symbol substitution task (DSST), digit span task (DS), and a mental arithmetic task (MA), while being exposed to GSM, UMTS, and sham signals under double-blind conditions were analyzed. Overall, cognitive functioning was not affected by short-term exposure to either GSM or UMTS signals in the current study. Nor did exposure affect the physiological measurements of blood volume pulse (BVP), heart rate (HR), and skin conductance (SC) that were taken while participants performed the cognitive tasks.

47 CFR 74.706 - Digital TV (DTV) station protection.

Code of Federal Regulations, 2010 CFR

2010-10-01

... Translator, and TV Booster Stations § 74.706 Digital TV (DTV) station protection. (a) For purposes of this... chapter. (b)(1) An application to construct a new low power TV or TV translator station or change the... translator or TV booster station field strength is calculated from the proposed effective radiated power (ERP...

47 CFR 74.788 - Digital construction period.

Code of Federal Regulations, 2010 CFR

2010-10-01

... Translator, and TV Booster Stations § 74.788 Digital construction period. (a) Each original construction permit for the construction of a new digital low power television or television translator station shall...

Air Weather Service Master Station Catalog: USAFETAC Climatic Database Users Handbook No. 6

DTIC Science & Technology

1993-03-01

4) . ... .4 • FIELD NO. DESCRIPTION OF FIELD AND COMMENTS 01 STN NUM. A 6- digit number with the first 5 digits assigned to a particular weather...reporting location lAW WMO ,ules plus a sixth digit as follows: 0 = The first five digits are the actual block/station number (WMO number) assigned to...it is considered inactive for that hour. A digit (1-9) tells how many months it has been since a report was received from the station for that hour

47 CFR 74.794 - Digital emissions.

Code of Federal Regulations, 2010 CFR

2010-10-01

..., AUXILIARY, SPECIAL BROADCAST AND OTHER PROGRAM DISTRIBUTIONAL SERVICES Low Power TV, TV Translator, and TV Booster Stations § 74.794 Digital emissions. (a)(1) An applicant for a digital LPTV or TV translator... (including attenuation of radio frequency harmonics), digital low power TV and TV translator stations...

47 CFR 25.214 - Technical requirements for space stations in the Satellite Digital Audio Radio Service and...

Code of Federal Regulations, 2014 CFR

2014-10-01

... 47 Telecommunication 2 2014-10-01 2014-10-01 false Technical requirements for space stations in the Satellite Digital Audio Radio Service and associated terrestrial repeaters. 25.214 Section 25.214... Technical Standards § 25.214 Technical requirements for space stations in the Satellite Digital Audio Radio...

47 CFR 25.214 - Technical requirements for space stations in the satellite digital audio radio service and...

Code of Federal Regulations, 2012 CFR

2012-10-01

... 47 Telecommunication 2 2012-10-01 2012-10-01 false Technical requirements for space stations in the satellite digital audio radio service and associated terrestrial repeaters. 25.214 Section 25.214... Technical Standards § 25.214 Technical requirements for space stations in the satellite digital audio radio...

47 CFR 25.214 - Technical requirements for space stations in the satellite digital audio radio service and...

Code of Federal Regulations, 2011 CFR

2011-10-01

... 47 Telecommunication 2 2011-10-01 2011-10-01 false Technical requirements for space stations in the satellite digital audio radio service and associated terrestrial repeaters. 25.214 Section 25.214... Technical Standards § 25.214 Technical requirements for space stations in the satellite digital audio radio...

47 CFR 25.214 - Technical requirements for space stations in the Satellite Digital Audio Radio Service and...

Code of Federal Regulations, 2013 CFR

2013-10-01

... 47 Telecommunication 2 2013-10-01 2013-10-01 false Technical requirements for space stations in the Satellite Digital Audio Radio Service and associated terrestrial repeaters. 25.214 Section 25.214... Technical Standards § 25.214 Technical requirements for space stations in the Satellite Digital Audio Radio...

47 CFR 25.214 - Technical requirements for space stations in the satellite digital audio radio service and...

Code of Federal Regulations, 2010 CFR

2010-10-01

... 47 Telecommunication 2 2010-10-01 2010-10-01 false Technical requirements for space stations in the satellite digital audio radio service and associated terrestrial repeaters. 25.214 Section 25.214... Technical Standards § 25.214 Technical requirements for space stations in the satellite digital audio radio...

KSC-00padig028

NASA Image and Video Library

2000-07-12

A Russian 3-stage Proton rocket blasts into the sky at 12:56 a.m. EDT with the Russian-built Zvezda module in a successful launch from Baikonur Cosmodrome, Kazakhstan. Zvezda is the primary Russian contribution to the International Space Station, serving as the early Station living quarters. It will also provide early propulsive attitude control and reboost capabilities and be the main docking port for Russian Progress cargo resupply vehicles. The third Station component, Zvezda will dock by remote control with the already orbiting Zarya and Unity modules at an altitude of about 245 by 230 statute miles. (Image taken with Nikon D1 digital camera.)

47 CFR 74.788 - Digital construction period.

Code of Federal Regulations, 2011 CFR

2011-10-01

... 47 Telecommunication 4 2011-10-01 2011-10-01 false Digital construction period. 74.788 Section 74... Translator, and TV Booster Stations § 74.788 Digital construction period. (a) Each original construction permit for the construction of a new digital low power television or television translator station shall...

47 CFR 73.674 - Digital television transition notices by broadcasters.

Code of Federal Regulations, 2011 CFR

2011-10-01

... 47 Telecommunication 4 2011-10-01 2011-10-01 false Digital television transition notices by... RADIO SERVICES RADIO BROADCAST SERVICES Television Broadcast Stations § 73.674 Digital television... broadcasting to digital television (DTV). For each such commercial station, a licensee or permittee must elect...

47 CFR 74.706 - Digital TV (DTV) station protection.

Code of Federal Regulations, 2013 CFR

2013-10-01

... Translator, and TV Booster Stations § 74.706 Digital TV (DTV) station protection. (a) For purposes of this... translator or TV booster station field strength is calculated from the proposed effective radiated power (ERP... translator or TV booster station application will not be accepted if the ratio in dB of its field strength to...

47 CFR 74.706 - Digital TV (DTV) station protection.

Code of Federal Regulations, 2011 CFR

2011-10-01

... Translator, and TV Booster Stations § 74.706 Digital TV (DTV) station protection. (a) For purposes of this... translator or TV booster station field strength is calculated from the proposed effective radiated power (ERP... translator or TV booster station application will not be accepted if the ratio in dB of its field strength to...

47 CFR 74.706 - Digital TV (DTV) station protection.

Code of Federal Regulations, 2014 CFR

2014-10-01

... Translator, and TV Booster Stations § 74.706 Digital TV (DTV) station protection. (a) For purposes of this... translator or TV booster station field strength is calculated from the proposed effective radiated power (ERP... translator or TV booster station application will not be accepted if the ratio in dB of its field strength to...

47 CFR 74.706 - Digital TV (DTV) station protection.

Code of Federal Regulations, 2012 CFR

2012-10-01

... Translator, and TV Booster Stations § 74.706 Digital TV (DTV) station protection. (a) For purposes of this... translator or TV booster station field strength is calculated from the proposed effective radiated power (ERP... translator or TV booster station application will not be accepted if the ratio in dB of its field strength to...

47 CFR 73.402 - Definitions.

Code of Federal Regulations, 2010 CFR

2010-10-01

... Digital Audio Broadcasting § 73.402 Definitions. (a) DAB. Digital audio broadcast stations are those radio... purposes. (b) In Band On Channel DAB System. A technical system in which a station's digital signal is... which transmits both the digital and analog signals within the spectral emission mask of a single AM or...

Digital watermarking for secure and adaptive teleconferencing

NASA Astrophysics Data System (ADS)

Vorbrueggen, Jan C.; Thorwirth, Niels

2002-04-01

The EC-sponsored project ANDROID aims to develop a management system for secure active networks. Active network means allowing the network's customers to execute code (Java-based so-called proxylets) on parts of the network infrastructure. Secure means that the network operator nonetheless retains full control over the network and its resources, and that proxylets use ANDROID-developed facilities to provide secure applications. Management is based on policies and allows autonomous, distributed decisions and actions to be taken. Proxylets interface with the system via policies; among actions they can take is controlling execution of other proxylets or redirection of network traffic. Secure teleconferencing is used as the application to demonstrate the approach's advantages. A way to control a teleconference's data streams is to use digital watermarking of the video, audio and/or shared-whiteboard streams, providing an imperceptible and inseparable side channel that delivers information from originating or intermediate stations to downstream stations. Depending on the information carried by the watermark, these stations can take many different actions. Examples are forwarding decisions based on security classifications (possibly time-varying) at security boundaries, set-up and tear-down of virtual private networks, intelligent and adaptive transcoding, recorder or playback control (e.g., speaking off the record), copyright protection, and sender authentication.

47 CFR 11.1 - Purpose.

Code of Federal Regulations, 2010 CFR

2010-10-01

... broadcast stations, digital broadcast stations, analog cable systems, digital cable systems, wireline video systems, wireless cable systems, Direct Broadcast Satellite (DBS) services, Satellite Digital Audio Radio... local government, or their designated representatives, with a means of emergency communication with the...

The validity and reliability of the StationMaster: a device to improve the accuracy of station assessment in labour.

PubMed

Awan, Noveen; Rhoades, Anthony; Weeks, Andrew D

2009-07-01

To compare the accuracy of digital assessment and the StationMaster (SM) in the assessment of fetal head station. The SM is a simple modification of the amniotomy hook which works by relocating the point of reference for station assessment from the ischial spines to the posterior fourchette. It is first adjusted to the woman's pelvic size, and then inserted into the vagina until it touches the fetal head. The station is then read off at the posterior fourchette in cm. An in vitro study of test validity and reliability was conducted at Liverpool Women's Hospital, Liverpool, UK. An apparatus was constructed in which a model fetal head could be accurately positioned within a mannequin's pelvis. Twenty midwives and 20 doctors (in current labour ward practice) gave their consent to take part. First, the head was placed in 5 random stations (-2 to +7 cm) and the participant asked to record their digital assessment for each. The participant was then taught to use the SM and the experiment repeated with 5 new stations. The complete experiment was repeated at least 2 weeks later using the same stations but in reverse order. The true values were compared with both the digital and SM assessments using mean differences with 95% limits of agreement. The repeatability of the two methods was assessed in the same way. Overall, the SM was more accurate than digital examination. The mean error (S.D.) ranged from 0.1 (1.2) to 2.6 (1.6) for the StationMaster and 0.3 (1.3) to 4.3 (1.1) for digital examination. Inaccuracies increased as the head descended through the pelvis. When assessed digitally, the true value fell outside one standard deviation for stations of more than +1cm. In contrast, with the SM the true value remained inside one standard deviation for all stations up to +5. In vitro the SM improves the accuracy of intrapartum station assessment.

Space Station on-orbit solar array loads during assembly

NASA Astrophysics Data System (ADS)

Ghofranian, S.; Fujii, E.; Larson, C. R.

This paper is concerned with the closed-loop dynamic analysis of on-orbit maneuvers when the Space Shuttle is fully mated to the Space Station Freedom. A flexible model of the Space Station in the form of component modes is attached to a rigid orbiter and on-orbit maneuvers are performed using the Shuttle Primary Reaction Control System jets. The traditional approach for this type of problems is to perform an open-loop analysis to determine the attitude control system jet profiles based on rigid vehicles and apply the resulting profile to a flexible Space Station. In this study a closed-loop Structure/Control model was developed in the Dynamic Analysis and Design System (DADS) program and the solar array loads were determined for single axis maneuvers with various delay times between jet firings. It is shown that the Digital Auto Pilot jet selection is affected by Space Station flexibility. It is also shown that for obtaining solar array loads the effect of high frequency modes cannot be ignored.

Electric field measuring and display system. [for cloud formations

NASA Technical Reports Server (NTRS)

Wojtasinski, R. J.; Lovall, D. D. (Inventor)

1974-01-01

An apparatus is described for monitoring the electric fields of cloud formations within a particular area. It utilizes capacitor plates that are alternately shielded from the clouds for generating an alternating signal corresponding to the intensity of the electric field of the clouds. A synchronizing signal is produced for controlling sampling of the alternating signal. Such samplings are fed through a filter and converted by an analogue to digital converter into digital form and subsequently fed to a transmitter for transmission to the control station for recording.

Solar-Powered Airplane with Cameras and WLAN

NASA Technical Reports Server (NTRS)

Higgins, Robert G.; Dunagan, Steve E.; Sullivan, Don; Slye, Robert; Brass, James; Leung, Joe G.; Gallmeyer, Bruce; Aoyagi, Michio; Wei, Mei Y.; Herwitz, Stanley R.;

47 CFR 74.785 - Low power TV digital data service pilot project.

Code of Federal Regulations, 2011 CFR

2011-10-01

... 47 Telecommunication 4 2011-10-01 2011-10-01 false Low power TV digital data service pilot project... Power TV, TV Translator, and TV Booster Stations § 74.785 Low power TV digital data service pilot project. Low power TV stations authorized pursuant to the LPTV Digital Data Services Act (Public Law 106...

47 CFR 74.785 - Low power TV digital data service pilot project.

Code of Federal Regulations, 2010 CFR

2010-10-01

... 47 Telecommunication 4 2010-10-01 2010-10-01 false Low power TV digital data service pilot project... Power TV, TV Translator, and TV Booster Stations § 74.785 Low power TV digital data service pilot project. Low power TV stations authorized pursuant to the LPTV Digital Data Services Act (Public Law 106...

Latest developments in advanced network management and cross-sharing of next-generation flux stations

NASA Astrophysics Data System (ADS)

Burba, George; Johnson, Dave; Velgersdyk, Michael; Begashaw, Israel; Allyn, Douglas

2016-04-01

In recent years, spatial and temporal flux data coverage improved significantly and on multiple scales, from a single station to continental networks, due to standardization, automation, and management of the data collection, and better handling of the extensive amounts of generated data. However, operating budgets for flux research items, such as labor, travel, and hardware, are becoming more difficult to acquire and sustain. With more stations and networks, larger data flows from each station, and smaller operating budgets, modern tools are required to effectively and efficiently handle the entire process, including sharing data among collaborative groups. On one hand, such tools can maximize time dedicated to publications answering research questions, and minimize time and expenses spent on data acquisition, processing, quality control and overall station management. On the other hand, cross-sharing the stations with external collaborators may help leverage available funding, and promote data analyses and publications. A new low-cost, advanced system, FluxSuite, utilizes a combination of hardware, software and web-services to address these specific demands. It automates key stages of flux workflow, minimizes day-to-day site management, and modernizes the handling of data flows: (i) The system can be easily incorporated into a new flux station, or as un upgrade to many presently operating flux stations, via weatherized remotely-accessible microcomputer, SmartFlux 2, with fully digital inputs (ii) Each next-generation station will measure all parameters needed for flux computations in a digital and PTP time-synchronized mode, accepting digital signals from a number of anemometers and data loggers (iii) The field microcomputer will calculate final fully-processed flux rates in real time, including computation-intensive Fourier transforms, spectra, co-spectra, multiple rotations, stationarity, footprint, etc. (iv) Final fluxes, radiation, weather and soil data will be merged into a single quality-control file (v) Multiple flux stations can be linked into an automated time-synchronized network (vi) Flux network managers, or PI's, can see all stations in real-time, including fluxes, supporting data, automated reports, and email alerts (vii) PI's can assign rights, allow or restrict access to stations and data: selected stations can be shared via rights-managed access internally or with external institutions (viii) Researchers without stations could form "virtual networks" for specific projects by collaborating with PIs from different actual networks This presentation provides detailed examples of FluxSuite currently utilized to manage two large flux networks in China (National Academy of Sciences and Agricultural Academy of Sciences), and smaller networks with stations in the USA, Germany, Ireland, Malaysia and other locations around the globe. Very latest 2016 developments and expanded functionality are also discussed.

47 CFR 80.459 - Digital selective calling.

Code of Federal Regulations, 2011 CFR

2011-10-01

... 47 Telecommunication 5 2011-10-01 2011-10-01 false Digital selective calling. 80.459 Section 80.459 Telecommunication FEDERAL COMMUNICATIONS COMMISSION (CONTINUED) SAFETY AND SPECIAL RADIO SERVICES STATIONS IN THE MARITIME SERVICES Public Coast Stations Use of Telegraphy § 80.459 Digital selective...

47 CFR 80.459 - Digital selective calling.

Code of Federal Regulations, 2010 CFR

2010-10-01

... 47 Telecommunication 5 2010-10-01 2010-10-01 false Digital selective calling. 80.459 Section 80.459 Telecommunication FEDERAL COMMUNICATIONS COMMISSION (CONTINUED) SAFETY AND SPECIAL RADIO SERVICES STATIONS IN THE MARITIME SERVICES Public Coast Stations Use of Telegraphy § 80.459 Digital selective...

Digitalization in the space sector - The Guatemalan experience

NASA Astrophysics Data System (ADS)

Robles, Jorge Rodolfo

The present status of Guatemalan satellite- and communications-related technology is discussed, including recent changes and plans for future work. The international telecommunications capacity and the operations of Guatel are emphasized. Plans for the digitalization of the land-based station Quetzal I and the addition of a second station are described. The equipment and configurations of the digital conversion are specified. The anticipated capacity of the Quetzal I station will be 300,000 telephone lines and the technology used will integrate international digital service for both transmission and exchange. The capacity of the second land station includes 1500 telephone channels, 30 IBS channels, and television transmission and reception. A plan for regional cooperation is proposed to improve the utilization of satellite technology in Central America.

47 CFR 74.710 - Digital low power TV and TV translator station protection.

Code of Federal Regulations, 2012 CFR

2012-10-01

... SERVICES Low Power TV, TV Translator, and TV Booster Stations § 74.710 Digital low power TV and TV... booster station or change the facilities of an existing station will not be accepted if it fails to... filed prior to the date the low power TV, TV translator, or TV booster application is filed. (b...

47 CFR 74.710 - Digital low power TV and TV translator station protection.

Code of Federal Regulations, 2011 CFR

2011-10-01

... SERVICES Low Power TV, TV Translator, and TV Booster Stations § 74.710 Digital low power TV and TV... booster station or change the facilities of an existing station will not be accepted if it fails to... filed prior to the date the low power TV, TV translator, or TV booster application is filed. (b...

47 CFR 74.710 - Digital low power TV and TV translator station protection.

Code of Federal Regulations, 2014 CFR

2014-10-01

... SERVICES Low Power TV, TV Translator, and TV Booster Stations § 74.710 Digital low power TV and TV... booster station or change the facilities of an existing station will not be accepted if it fails to... filed prior to the date the low power TV, TV translator, or TV booster application is filed. (b...

47 CFR 74.708 - Class A TV and digital Class A TV station protection.

Code of Federal Regulations, 2012 CFR

2012-10-01

... SERVICES Low Power TV, TV Translator, and TV Booster Stations § 74.708 Class A TV and digital Class A TV... booster station or change the facilities of an existing station will not be accepted if it fails to... prior to the date the low power TV, TV translator, or TV booster application is filed. (c) Applications...

47 CFR 74.708 - Class A TV and digital Class A TV station protection.

Code of Federal Regulations, 2011 CFR

2011-10-01

... SERVICES Low Power TV, TV Translator, and TV Booster Stations § 74.708 Class A TV and digital Class A TV... booster station or change the facilities of an existing station will not be accepted if it fails to... prior to the date the low power TV, TV translator, or TV booster application is filed. (c) Applications...

47 CFR 74.710 - Digital low power TV and TV translator station protection.

Code of Federal Regulations, 2013 CFR

2013-10-01

... SERVICES Low Power TV, TV Translator, and TV Booster Stations § 74.710 Digital low power TV and TV... booster station or change the facilities of an existing station will not be accepted if it fails to... filed prior to the date the low power TV, TV translator, or TV booster application is filed. (b...

47 CFR 74.708 - Class A TV and digital Class A TV station protection.

Code of Federal Regulations, 2013 CFR

2013-10-01

... SERVICES Low Power TV, TV Translator, and TV Booster Stations § 74.708 Class A TV and digital Class A TV... booster station or change the facilities of an existing station will not be accepted if it fails to... prior to the date the low power TV, TV translator, or TV booster application is filed. (c) Applications...

47 CFR 74.708 - Class A TV and digital Class A TV station protection.

Code of Federal Regulations, 2014 CFR

2014-10-01

... SERVICES Low Power TV, TV Translator, and TV Booster Stations § 74.708 Class A TV and digital Class A TV... booster station or change the facilities of an existing station will not be accepted if it fails to... prior to the date the low power TV, TV translator, or TV booster application is filed. (c) Applications...

47 CFR 2.303 - Other forms of identification of stations.

Code of Federal Regulations, 2010 CFR

2010-10-01

... whose signals are being relayed, or by network identification. Broadcasting (television booster.... (b) Digital selective calls will be authorized by the Commission and will be formed by groups of... identification number: 4 digits. (2) Ship station selective call number: 5 digits. (3) Predetermined group of...

Mapping experiment with space station

NASA Technical Reports Server (NTRS)

Wu, S. S. C.

1986-01-01

Mapping of the Earth from space stations can be approached in two areas. One is to collect gravity data for defining topographic datum using Earth's gravity field in terms of spherical harmonics. The other is to search and explore techniques of mapping topography using either optical or radar images with or without reference to ground central points. Without ground control points, an integrated camera system can be designed. With ground control points, the position of the space station (camera station) can be precisely determined at any instant. Therefore, terrestrial topography can be precisely mapped either by conventional photogrammetric methods or by current digital technology of image correlation. For the mapping experiment, it is proposed to establish four ground points either in North America or Africa (including the Sahara desert). If this experiment should be successfully accomplished, it may also be applied to the defense charting systems.

The Integrated Mission-Planning Station: Functional Requirements, Aviator-Computer Dialogue, and Human Engineering Design Criteria.

DTIC Science & Technology

1983-08-01

AD- R136 99 THE INTEGRATED MISSION-PLNNING STATION: FUNCTIONAL 1/3 REQUIREMENTS AVIATOR-..(U) RNACAPR SCIENCES INC SANTA BARBARA CA S P ROGERS RUG...Continue on reverse side o necess.ar and identify by btock number) Interactive Systems Aviation Control-Display Functional Require- Plan-Computer...Dialogue Avionics Systems ments Map Display Army Aviation Design Criteria Helicopters M4ission Planning Cartography Digital Map Human Factors Navigation

47 CFR 74.798 - Digital television transition notices by broadcasters.

Code of Federal Regulations, 2012 CFR

2012-10-01

... the highest number of viewers is watching. Stations have the discretion as to the form of these... SERVICES Low Power TV, TV Translator, and TV Booster Stations § 74.798 Digital television transition notices by broadcasters. (a) Each low power television, TV translator and Class A television station...

47 CFR 74.798 - Digital television transition notices by broadcasters.

Code of Federal Regulations, 2013 CFR

2013-10-01

... the highest number of viewers is watching. Stations have the discretion as to the form of these... SERVICES Low Power TV, TV Translator, and TV Booster Stations § 74.798 Digital television transition notices by broadcasters. (a) Each low power television, TV translator and Class A television station...

47 CFR 74.798 - Digital television transition notices by broadcasters.

Code of Federal Regulations, 2011 CFR

2011-10-01

... the highest number of viewers is watching. Stations have the discretion as to the form of these... SERVICES Low Power TV, TV Translator, and TV Booster Stations § 74.798 Digital television transition notices by broadcasters. (a) Each low power television, TV translator and Class A television station...

47 CFR 74.798 - Digital television transition notices by broadcasters.

Code of Federal Regulations, 2014 CFR

2014-10-01

... the highest number of viewers is watching. Stations have the discretion as to the form of these... SERVICES Low Power TV, TV Translator, and TV Booster Stations § 74.798 Digital television transition notices by broadcasters. (a) Each low power television, TV translator and Class A television station...

75 FR 81269 - Public Information Collection Requirement Submitted to OMB for Review and Approval, Comments...

Federal Register 2010, 2011, 2012, 2013, 2014

2010-12-27

... Power Television Translator, Television Booster Stations, and to Amend Rules for Digital Class A... television translator (``TV translator'') stations and modifies certain rules applicable to digital Class A... (namely, ``low power television, TV translator, and Class A television station DTV licensees''). The...

47 CFR 74.789 - Broadcast regulations applicable to digital low power television and television translator stations.

Code of Federal Regulations, 2010 CFR

2010-10-01

... power television and television translator stations. 74.789 Section 74.789 Telecommunication FEDERAL... AND OTHER PROGRAM DISTRIBUTIONAL SERVICES Low Power TV, TV Translator, and TV Booster Stations § 74.789 Broadcast regulations applicable to digital low power television and television translator...

Implementation of a Digital Signal Processing Subsystem for a Long Wavelength Array Station

NASA Technical Reports Server (NTRS)

Soriano, Melissa; Navarro, Robert; D'Addario, Larry; Sigman, Elliott; Wang, Douglas

2011-01-01

This paper describes the implementation of a Digital Signal Processing (DP) subsystem for a single Long Wavelength Array (LWA) station.12 The LWA is a radio telescope that will consist of many phased array stations. Each LWA station consists of 256 pairs of dipole-like antennas operating over the 10-88 MHz frequency range. The Digital Signal Processing subsystem digitizes up to 260 dual-polarization signals at 196 MHz from the LWA Analog Receiver, adjusts the delay and amplitude of each signal, and forms four independent beams. Coarse delay is implemented using a first-in-first-out buffer and fine delay is implemented using a finite impulse response filter. Amplitude adjustment and polarization corrections are implemented using a 2x2 matrix multiplication

Preliminary control system design and analysis for the Space Station Furnace Facility thermal control system

NASA Technical Reports Server (NTRS)

Jackson, M. E.

1995-01-01

This report presents the Space Station Furnace Facility (SSFF) thermal control system (TCS) preliminary control system design and analysis. The SSFF provides the necessary core systems to operate various materials processing furnaces. The TCS is defined as one of the core systems, and its function is to collect excess heat from furnaces and to provide precise cold temperature control of components and of certain furnace zones. Physical interconnection of parallel thermal control subsystems through a common pump implies the description of the TCS by coupled nonlinear differential equations in pressure and flow. This report formulates the system equations and develops the controllers that cause the interconnected subsystems to satisfy flow rate tracking requirements. Extensive digital simulation results are presented to show the flow rate tracking performance.

75 FR 63766 - Digital Low Power Television, Television Translator, and Television Booster Stations and Digital...

Federal Register 2010, 2011, 2012, 2013, 2014

2010-10-18

... Displacement Application. Form Numbers: FCC Form 346. Type of Review: Revision of a currently approved... Displacement Application. The Commission proposes to require all low power station with facilities on out-of- core channels (channels 52-59) to submit a digital displacement (FCC Form 346) application proposing an...

Spacelab, Spacehab, and Space Station Freedom payload interface projects

NASA Technical Reports Server (NTRS)

Smith, Dean Lance

1992-01-01

Contributions were made to several projects. Howard Nguyen was assisted in developing the Space Station RPS (Rack Power Supply). The RPS is a computer controlled power supply that helps test equipment used for experiments before the equipment is installed on Space Station Freedom. Ron Bennett of General Electric Government Services was assisted in the design and analysis of the Standard Interface Rack Controller hardware and software. An analysis was made of the GPIB (General Purpose Interface Bus), looking for any potential problems while transmitting data across the bus, such as the interaction of the bus controller with a data talker and its listeners. An analysis was made of GPIB bus communications in general, including any negative impact the bus may have on transmitting data back to Earth. A study was made of transmitting digital data back to Earth over a video channel. A report was written about the study and a revised version of the report will be submitted for publication. Work was started on the design of a PC/AT compatible circuit board that will combine digital data with a video signal. Another PC/AT compatible circuit board is being designed to recover the digital data from the video signal. A proposal was submitted to support the continued development of the interface boards after the author returns to Memphis State University in the fall. A study was also made of storing circuit board design software and data on the hard disk server of a LAN (Local Area Network) that connects several IBM style PCs. A report was written that makes several recommendations. A preliminary design review was started of the AIVS (Automatic Interface Verification System). The summer was over before any significant contribution could be made to this project.

Aspects of quality insurance in digitizing historical climate data in Germany

NASA Astrophysics Data System (ADS)

Mächel, H.; Behrends, J.; Kapala, A.

2010-09-01

This contribution presents some of the problems and offers solutions regarding the digitization of historical meteorological data, and explains the need for verification and quality control. For the assessment of changes in climate extremes, long-term and complete observational records with a high temporal resolution are needed. However, in most countries, including Germany, such climate data are rare. Therefore, in 2005, the German Weather Service launched a project to inventory and digitize historical daily climatic records in cooperation with the Meteorological Institute of the University of Bonn. Experience with Optical Character Recognition (OCR) show that it is only of very limited use, as even printed tables (e.g. yearbooks) are not sufficiently recognized (10-20% error). In hand-written records, the recognition rate is about 50%. By comparing daily and monthly values, it is possible to auto-detect errors, but they can not be automatically corrected, since there is often more than one error per month. These erroneous data must then be controlled manually on an individual basis, which is significantly more error-prone than direct manual input. Therefore, both precipitation and climate station data are digitized manually. The time required to digitize one year of precipitation data (including the recording of daily precipitation amount and type, snow amount and type, and weather events such as thunder storms, fog, etc.) is equivalent to about five hours for one year of data. This involves manually typing, reformatting and quality control of the digitized data, as well as creating a digital photograph. For climate stations with three observations per day, the working time is 30-50 hours for one year of data, depending on the number of parameters and the condition of the documents. Several other problems occur when creating the digital records from historical observational data, some of which are listed below. Older records often used varying units and different conventions. For example, a value of 100 was added to the observed temperatures to avoid negative values. Furthermore, because standardization of the observations was very low when measurements began up to 200 years ago, the data often reflect a greater part of non-climatic influences. Varying daily observation times make it difficult to calculate a representative daily value. Even unconventional completed tables cost labor and requires experienced and trained staff. Data homogenization as well as both manual and automatic quality control may address some of these problems.

76 FR 31992 - In the Matter of Nine Mile Point Nuclear Station, LLC; Nine Mile Point Nuclear Station...

Federal Register 2010, 2011, 2012, 2013, 2014

2011-06-02

... Secretary by e-mail at [email protected] , or by telephone at 301-415-1677, to request (1) a digital...-issued digital ID certificate). Based upon this information, the Secretary will establish an electronic... docket. Information about applying for a digital ID certificate is available on the NRC's public Web site...

75 FR 35027 - Notice of Public Information Collection Approved By the Office of Management and Budget

Federal Register 2010, 2011, 2012, 2013, 2014

2010-06-21

... must file an informal request for any increase in the station's FM Digital ERP). (2) Licensees to... Digital ERP beyond 6 dB. (3) Licensees submitting such a request must use a simplified method set forth in the Order to determine the proponent station's maximum permissible FM Digital ERP. (4) In situations...

Sliding Mode Thermal Control System for Space Station Furnace Facility

NASA Technical Reports Server (NTRS)

Jackson Mark E.; Shtessel, Yuri B.

1998-01-01

The decoupled control of the nonlinear, multiinput-multioutput, and highly coupled space station furnace facility (SSFF) thermal control system is addressed. Sliding mode control theory, a subset of variable-structure control theory, is employed to increase the performance, robustness, and reliability of the SSFF's currently designed control system. This paper presents the nonlinear thermal control system description and develops the sliding mode controllers that cause the interconnected subsystems to operate in their local sliding modes, resulting in control system invariance to plant uncertainties and external and interaction disturbances. The desired decoupled flow-rate tracking is achieved by optimization of the local linear sliding mode equations. The controllers are implemented digitally and extensive simulation results are presented to show the flow-rate tracking robustness and invariance to plant uncertainties, nonlinearities, external disturbances, and variations of the system pressure supplied to the controlled subsystems.

Inverse planning in the age of digital LINACs: station parameter optimized radiation therapy (SPORT)

NASA Astrophysics Data System (ADS)

Xing, Lei; Li, Ruijiang

2014-03-01

The last few years have seen a number of technical and clinical advances which give rise to a need for innovations in dose optimization and delivery strategies. Technically, a new generation of digital linac has become available which offers features such as programmable motion between station parameters and high dose-rate Flattening Filter Free (FFF) beams. Current inverse planning methods are designed for traditional machines and cannot accommodate these features of new generation linacs without compromising either dose conformality and/or delivery efficiency. Furthermore, SBRT is becoming increasingly important, which elevates the need for more efficient delivery, improved dose distribution. Here we will give an overview of our recent work in SPORT designed to harness the digital linacs and highlight the essential components of SPORT. We will summarize the pros and cons of traditional beamlet-based optimization (BBO) and direct aperture optimization (DAO) and introduce a new type of algorithm, compressed sensing (CS)-based inverse planning, that is capable of automatically removing the redundant segments during optimization and providing a plan with high deliverability in the presence of a large number of station control points (potentially non-coplanar, non-isocentric, and even multi-isocenters). We show that CS-approach takes the interplay between planning and delivery into account and allows us to balance the dose optimality and delivery efficiency in a controlled way and, providing a viable framework to address various unmet demands of the new generation linacs. A few specific implementation strategies of SPORT in the forms of fixed-gantry and rotational arc delivery are also presented.

7 CFR 1740.7 - Ineligible purposes.

Code of Federal Regulations, 2011 CFR

2011-01-01

... 7 Agriculture 11 2011-01-01 2011-01-01 false Ineligible purposes. 1740.7 Section 1740.7 Agriculture Regulations of the Department of Agriculture (Continued) RURAL UTILITIES SERVICE, DEPARTMENT OF AGRICULTURE PUBLIC TELEVISION STATION DIGITAL TRANSITION GRANT PROGRAM Public Television Station Digital...

7 CFR 1740.10 - Grant documents.

Code of Federal Regulations, 2011 CFR

2011-01-01

... 7 Agriculture 11 2011-01-01 2011-01-01 false Grant documents. 1740.10 Section 1740.10 Agriculture Regulations of the Department of Agriculture (Continued) RURAL UTILITIES SERVICE, DEPARTMENT OF AGRICULTURE PUBLIC TELEVISION STATION DIGITAL TRANSITION GRANT PROGRAM Public Television Station Digital Transition...

7 CFR 1740.3 - Applicant eligibility.

Code of Federal Regulations, 2011 CFR

2011-01-01

... 7 Agriculture 11 2011-01-01 2011-01-01 false Applicant eligibility. 1740.3 Section 1740.3 Agriculture Regulations of the Department of Agriculture (Continued) RURAL UTILITIES SERVICE, DEPARTMENT OF AGRICULTURE PUBLIC TELEVISION STATION DIGITAL TRANSITION GRANT PROGRAM Public Television Station Digital...

7 CFR 1740.3 - Applicant eligibility.

Code of Federal Regulations, 2010 CFR

2010-01-01

... 7 Agriculture 11 2010-01-01 2010-01-01 false Applicant eligibility. 1740.3 Section 1740.3 Agriculture Regulations of the Department of Agriculture (Continued) RURAL UTILITIES SERVICE, DEPARTMENT OF AGRICULTURE PUBLIC TELEVISION STATION DIGITAL TRANSITION GRANT PROGRAM Public Television Station Digital...

7 CFR 1740.10 - Grant documents.

Code of Federal Regulations, 2010 CFR

2010-01-01

... 7 Agriculture 11 2010-01-01 2010-01-01 false Grant documents. 1740.10 Section 1740.10 Agriculture Regulations of the Department of Agriculture (Continued) RURAL UTILITIES SERVICE, DEPARTMENT OF AGRICULTURE PUBLIC TELEVISION STATION DIGITAL TRANSITION GRANT PROGRAM Public Television Station Digital Transition...

7 CFR 1740.7 - Ineligible purposes.

Code of Federal Regulations, 2010 CFR

2010-01-01

... 7 Agriculture 11 2010-01-01 2010-01-01 false Ineligible purposes. 1740.7 Section 1740.7 Agriculture Regulations of the Department of Agriculture (Continued) RURAL UTILITIES SERVICE, DEPARTMENT OF AGRICULTURE PUBLIC TELEVISION STATION DIGITAL TRANSITION GRANT PROGRAM Public Television Station Digital...

7 CFR 1740.5 - Matching funds.

Code of Federal Regulations, 2010 CFR

2010-01-01

... 7 Agriculture 11 2010-01-01 2010-01-01 false Matching funds. 1740.5 Section 1740.5 Agriculture Regulations of the Department of Agriculture (Continued) RURAL UTILITIES SERVICE, DEPARTMENT OF AGRICULTURE PUBLIC TELEVISION STATION DIGITAL TRANSITION GRANT PROGRAM Public Television Station Digital Transition...

7 CFR 1740.11 - Requests for funds.

Code of Federal Regulations, 2011 CFR

2011-01-01

... 7 Agriculture 11 2011-01-01 2011-01-01 false Requests for funds. 1740.11 Section 1740.11 Agriculture Regulations of the Department of Agriculture (Continued) RURAL UTILITIES SERVICE, DEPARTMENT OF AGRICULTURE PUBLIC TELEVISION STATION DIGITAL TRANSITION GRANT PROGRAM Public Television Station Digital...

7 CFR 1740.11 - Requests for funds.

Code of Federal Regulations, 2010 CFR

2010-01-01

... 7 Agriculture 11 2010-01-01 2010-01-01 false Requests for funds. 1740.11 Section 1740.11 Agriculture Regulations of the Department of Agriculture (Continued) RURAL UTILITIES SERVICE, DEPARTMENT OF AGRICULTURE PUBLIC TELEVISION STATION DIGITAL TRANSITION GRANT PROGRAM Public Television Station Digital...

USSR Report Earth Sciences.

DTIC Science & Technology

1987-05-22

Autonomous Digital Recording Tiltmeter Station (V. M. Ivshin, V. S. Kuznetsov, et al.; VULKANOLOGIYA I SEYSMOLOGIYA, No 6, Nov-Dec 86) 83 Influence of...2 Western. 6508/12955 CS0: 1865/303 UDC 550.34.038.8:528.087.4 AUTONOMOUS DIGITAL RECORDING TILTMETER STATION Moscow VULKANOLOGIYA I...point in the Kamchatka region, an autonomous tiltmeter station has been developed on the basis of the TM-1V tiltmeter . Measured data are registered

7 CFR 1740.4 - Maximum amounts of grants.

Code of Federal Regulations, 2011 CFR

2011-01-01

... 7 Agriculture 11 2011-01-01 2011-01-01 false Maximum amounts of grants. 1740.4 Section 1740.4 Agriculture Regulations of the Department of Agriculture (Continued) RURAL UTILITIES SERVICE, DEPARTMENT OF AGRICULTURE PUBLIC TELEVISION STATION DIGITAL TRANSITION GRANT PROGRAM Public Television Station Digital...

7 CFR 1740.4 - Maximum amounts of grants.

Code of Federal Regulations, 2010 CFR

2010-01-01

... 7 Agriculture 11 2010-01-01 2010-01-01 false Maximum amounts of grants. 1740.4 Section 1740.4 Agriculture Regulations of the Department of Agriculture (Continued) RURAL UTILITIES SERVICE, DEPARTMENT OF AGRICULTURE PUBLIC TELEVISION STATION DIGITAL TRANSITION GRANT PROGRAM Public Television Station Digital...

Hadfield, Helms and Voss work on the SSRMS controls in Destiny

NASA Image and Video Library

2001-04-28

S100-E-5884 (28 April 2001) --- Some of the principal participants of an historical event are pictured in the Destiny laboratory aboard the International Space Station (ISS). From left to right are astronauts Chris A. Hadfield, STS-100 mission specialist, and astronauts Susan J. Helms and James S. Voss, Expedition Two flight engineers. A Canadian “handshake in space” occurred at 4:02 p.m (CDT), April 28, 2001, as the Canadian-built space station robotic arm – operated by Helms – transferred its launch cradle over to Endeavour’s robotic arm, with Canadian Space Agency astronaut Hadfield at the controls. In this scene, Hadfield has temporarily vacated his post on Endeavour's aft flight deck and was having a brief strategy meeting with the Expedition Two crew on the docked station. The exchange of the pallet from station arm to shuttle arm marked the first ever robotic-to-robotic transfer in space. This image was recorded with a digital still camera.

Analog FM/FM versus digital color TV transmission aboard space station

NASA Technical Reports Server (NTRS)

Hart, M. M.

1985-01-01

Langley Research Center is developing an integrated fault tolerant network to support data, voice, and video communications aboard Space Station. The question of transmitting the video data via dedicated analog channels or converting it to the digital domain for consistancy with the test of the data is addressed. The recommendations in this paper are based on a comparison in the signal-to-noise ratio (SNR), the type of video processing required aboard Space Station, the applicability to Space Station, and how they integrate into the network.

Seismic databases of The Caucasus

NASA Astrophysics Data System (ADS)

Gunia, I.; Sokhadze, G.; Mikava, D.; Tvaradze, N.; Godoladze, T.

2012-12-01

The Caucasus is one of the active segments of the Alpine-Himalayan collision belt. The region needs continues seismic monitoring systems for better understanding of tectonic processes going in the region. Seismic Monitoring Center of Georgia (Ilia State University) is operating the digital seismic network of the country and is also collecting and exchanging data with neighboring countries. The main focus of our study was to create seismic database which is well organized, easily reachable and is convenient for scientists to use. The seismological database includes the information about more than 100 000 earthquakes from the whole Caucasus. We have to mention that it includes data from analog and digital seismic networks. The first analog seismic station in Georgia was installed in 1899 in the Caucasus in Tbilisi city. The number of analog seismic stations was increasing during next decades and in 1980s about 100 analog stations were operated all over the region. From 1992 due to political and economical situation the number of stations has been decreased and in 2002 just two analog equipments was operated. New digital seismic network was developed in Georgia since 2003. The number of digital seismic stations was increasing and in current days there are more than 25 digital stations operating in the country. The database includes the detailed information about all equipments installed on seismic stations. Database is available online. That will make convenient interface for seismic data exchange data between Caucasus neighboring countries. It also makes easier both the seismic data processing and transferring them to the database and decreases the operator's mistakes during the routine work. The database was created using the followings: php, MySql, Javascript, Ajax, GMT, Gmap, Hypoinverse.

View of the docking approach of Endeavour taken during Expedition Three

NASA Image and Video Library

2001-12-07

ISS003-E-8326 (7 Dec 2001) --- The Space Shuttle Endeavour, controlled by the flight crew of STS-108, is backdropped over a large area of cloud cover on Earth as it nears its rendezvous with the International Space Station (ISS). The Raffaello logistics module that is being brought up to the orbiting outpost is clearly visible in Endeavour's cargo bay. Among other activities the Endeavour's mission will include the change out of the station crews. The image was recorded with a digital still camera.

View of the docking approach of Endeavour taken during Expedition Three

NASA Image and Video Library

2001-12-07

ISS003-E-8328 (7 December 2001) --- The Space Shuttle Endeavour, controlled by the flight crew of STS-108, is backdropped over a large area of cloud cover on Earth as it nears its rendezvous with the International Space Station (ISS). The Raffaello logistics module that is being brought up to the orbiting outpost is clearly visible in Endeavour's cargo bay. Among other activities the Endeavour's mission will include the change out of the station crews. The image was recorded with a digital still camera.

Development of Automated Moment Tensor Software at the Prototype International Data Center

DTIC Science & Technology

2000-09-01

Berkeley Digital Seismic Network stations in the 100 to 500 km distance range. With sufficient azimuthal coverage this method is found to perform...the solution reported by NIED (http://argent.geo.bosai.go.jp/ freesia /event/hypo/joho.html). The normal mechanism obtained by the three-component...Digital Seismic Network stations. These stations provide more than 100 degrees of azimuthal coverage, which is an adequate sampling of the focal

Automation of servicibility of radio-relay station equipment

NASA Astrophysics Data System (ADS)

Uryev, A. G.; Mishkin, Y. I.; Itkis, G. Y.

1985-03-01

Automation of the serviceability of radio relay station equipment must ensure central gathering and primary processing of reliable instrument reading with subsequent display on the control panel, detection and recording of failures soon enough, advance enough warning based on analysis of detertioration symptoms, and correct remote measurement of equipment performance parameters. Such an inspection will minimize transmission losses while reducing nonproductive time and labor spent on documentation and measurement. A multichannel automated inspection system for this purpose should operate by a parallel rather than sequential procedure. Digital data processing is more expedient in this case than analog method and, therefore, analog to digital converters are required. Spepcial normal, above limit and below limit test signals provide means of self-inspection, to which must be added adequate interference immunization, stabilization, and standby power supply. Use of a microcomputer permits overall refinement and expansion of the inspection system while it minimizes though not completely eliminates dependence on subjective judgment.

Index of surface-water stations in Texas, January 1984

USGS Publications Warehouse

Carrillo, E.R.; Buckner, H.D.

1984-01-01

This index shows the station number and name, latitude and longitude, type of data collected, and the office principally responsible for the data collection (table 1). An 8-digit permanent numerical designation for gaging stations has been adopted on a nationwide basis; stations are numbered and listed in downstream order. In the downstream direction along the main stem, all stations on a tributary entering above a main-stem station are listed before that station. A tributary entering between two main-stem stations is listed between them. A similar order is followed in listing stations on first rank, second rank, and other ranks of tributaries. To indicate the rank of any tributary on which a gaging station is situated and the stream to which it is an immediate tributary, each indention in the listing of gaging stations represent one rank. This downstream order and system of indention show which gaging stations are on tributaries between any two stations on a main stem and the rank of the tributary on which each gaging station is situated. On plates 1 and 2 the 8-digit station number is abbreviated because of space limitation.

Index of surface-water stations in Texas, January 1985

USGS Publications Warehouse

Carrillo, E.R.; Buckner, H.D.; Rawson, Jack

1984-01-01

This index shows the station number -and name, latitude and longitude, type of data collected, and the office principally responsible for the data collection (table 1). An 8-digit permanent numerical designation for gaging stations has been adopted on a nationwide basis; stations are numbered and listed in downstream order. In the downstream direction along the main stem, all stations on a tributary entering above a main-stem station are listed before that station. A tributary entering between two main-stem stations is listed between them. A similar order is followed in listing stations on first rank, second rank, and other ranks of tributaries. To indicate the rank of any tributary on which a gaging station is situated and the stream to which it is an immediate tributary, each indention in the listing of gaging stations represent one rank. This downstream order and system of indention show which gaging stations are on tributaries between any two stations on a main stem and the rank of the tributary on which each gaging station is situated. On plates 1 and 2, the 8-digit station number is abbreviated because of space limitation.

Index of surface-water stations in Texas, January 1987

USGS Publications Warehouse

Rawson, Jack; Carrillo, E.R.; Buckner, H.D.

1987-01-01

This index shows the station number and name, latitude and longitude, type of data collected, and the office principally responsible for the data collection (table 1). An 8-digit permanent numerical designation for gaging stations has been adopted on a nationwide basis; stations are numbered and listed in downstream order. In the downstream direction along the main stem, all stations on a tributary entering above a main-stem station are listed before that station. A tributary entering between two main-stem stations is listed between them. A similar order is followed in listing stations on first rank, second rank, and other ranks of tributaries. To indicate the rank of any tributary on which a gaging station is situated and the stream to which it is an immediate tributary, each indention in the listing of gaging stations represent one rank. This downstream order and system of indention show which gaging stations are on tributaries between any two stations on a main stem and the rank of the tributary on which each gaging station is situated. On plates 1 and 2, the 8-digit station number is abbreviated because of space limitation.

Index of surface-water stations in Texas, January 1988

USGS Publications Warehouse

Rawson, Jack; Carrillo, E.R.; Buckner, H.D.

1988-01-01

This index shows the station number and name, latitude and longitude, type of data collected, and the office principally responsible for the data collection (table 1). An 8-digit permanent numerical designation for gaging stations has been adopted on a nationwide basis; stations are numbered and listed in downstream order. In the downstream direction along the main stem, all stations on a tributary entering above a main-stem station are listed before that station. A tributary entering between two main-stem stations is listed between them. A similar order is followed in listing stations on first rank, second rank, and other ranks of tributaries. To indicate the rank of any tributary on which a gaging station is situated and the stream to which it is an immediate tributary, each indention in the listing of gaging stations represent one rank. This downstream order and system of indention show which gaging stations are on tributaries between any two stations on a main stem and the rank of the tributary on which each gaging station is situated. On plates 1 and 2, the 8-digit station number is abbreviated because of space limitation.

Man-machine interactive imaging and data processing using high-speed digital mass storage

NASA Technical Reports Server (NTRS)

Alsberg, H.; Nathan, R.

1975-01-01

The role of vision in teleoperation has been recognized as an important element in the man-machine control loop. In most applications of remote manipulation, direct vision cannot be used. To overcome this handicap, the human operator's control capabilities are augmented by a television system. This medium provides a practical and useful link between workspace and the control station from which the operator perform his tasks. Human performance deteriorates when the images are degraded as a result of instrumental and transmission limitations. Image enhancement is used to bring out selected qualities in a picture to increase the perception of the observer. A general purpose digital computer, an extensive special purpose software system is used to perform an almost unlimited repertoire of processing operations.

47 CFR 73.402 - Definitions.

Code of Federal Regulations, 2011 CFR

2011-10-01

... Digital Audio Broadcasting § 73.402 Definitions. (a) DAB. Digital audio broadcast stations are those radio... into multiple channels for additional audio programming uses. (g) Datacasting. Subdividing the digital...

47 CFR 73.402 - Definitions.

Code of Federal Regulations, 2012 CFR

2012-10-01

... Digital Audio Broadcasting § 73.402 Definitions. (a) DAB. Digital audio broadcast stations are those radio... into multiple channels for additional audio programming uses. (g) Datacasting. Subdividing the digital...

47 CFR 73.402 - Definitions.

Code of Federal Regulations, 2014 CFR

2014-10-01

... Digital Audio Broadcasting § 73.402 Definitions. (a) DAB. Digital audio broadcast stations are those radio... into multiple channels for additional audio programming uses. (g) Datacasting. Subdividing the digital...

47 CFR 73.402 - Definitions.

Code of Federal Regulations, 2013 CFR

2013-10-01

... Digital Audio Broadcasting § 73.402 Definitions. (a) DAB. Digital audio broadcast stations are those radio... into multiple channels for additional audio programming uses. (g) Datacasting. Subdividing the digital...

Evaluation of force-torque displays for use with space station telerobotic activities

NASA Technical Reports Server (NTRS)

Hendrich, Robert C.; Bierschwale, John M.; Manahan, Meera K.; Stuart, Mark A.; Legendre, A. Jay

1992-01-01

Recent experiments which addressed Space Station remote manipulation tasks found that tactile force feedback (reflecting forces and torques encountered at the end-effector through the manipulator hand controller) does not improve performance significantly. Subjective response from astronaut and non-astronaut test subjects indicated that force information, provided visually, could be useful. No research exists which specifically investigates methods of presenting force-torque information visually. This experiment was designed to evaluate seven different visual force-torque displays which were found in an informal telephone survey. The displays were prototyped in the HyperCard programming environment. In a within-subjects experiment, 14 subjects nullified forces and torques presented statically, using response buttons located at the bottom of the screen. Dependent measures included questionnaire data, errors, and response time. Subjective data generally demonstrate that subjects rated variations of pseudo-perspective displays consistently better than bar graph and digital displays. Subjects commented that the bar graph and digital displays could be used, but were not compatible with using hand controllers. Quantitative data show similar trends to the subjective data, except that the bar graph and digital displays both provided good performance, perhaps do to the mapping of response buttons to display elements. Results indicate that for this set of displays, the pseudo-perspective displays generally represent a more intuitive format for presenting force-torque information.

Automated Meteor Detection by All-Sky Digital Camera Systems

NASA Astrophysics Data System (ADS)

Suk, Tomáš; Šimberová, Stanislava

2017-12-01

We have developed a set of methods to detect meteor light traces captured by all-sky CCD cameras. Operating at small automatic observatories (stations), these cameras create a network spread over a large territory. Image data coming from these stations are merged in one central node. Since a vast amount of data is collected by the stations in a single night, robotic storage and analysis are essential to processing. The proposed methodology is adapted to data from a network of automatic stations equipped with digital fish-eye cameras and includes data capturing, preparation, pre-processing, analysis, and finally recognition of objects in time sequences. In our experiments we utilized real observed data from two stations.

78 FR 42487 - Announcement of Grant Application Deadlines; Deadlines and Funding Levels

Federal Register 2010, 2011, 2012, 2013, 2014

2013-07-16

... full digital transition of their stations across all equipment. Rural stations often have translators... FCC deadline did not apply to translators, and in 2011 the FCC adopted a final deadline for analog-to-digital conversion of all translators by September 1, 2015. Because of this, translators have been allowed...

Broadband network on-line data acquisition system with web based interface for control and basic analysis

NASA Astrophysics Data System (ADS)

Polkowski, Marcin; Grad, Marek

2016-04-01

Passive seismic experiment "13BB Star" is operated since mid 2013 in northern Poland and consists of 13 broadband seismic stations. One of the elements of this experiment is dedicated on-line data acquisition system comprised of both client (station) side and server side modules with web based interface that allows monitoring of network status and provides tools for preliminary data analysis. Station side is controlled by ARM Linux board that is programmed to maintain 3G/EDGE internet connection, receive data from digitizer, send data do central server among with additional auxiliary parameters like temperatures, voltages and electric current measurements. Station side is controlled by set of easy to install PHP scripts. Data is transmitted securely over SSH protocol to central server. Central server is a dedicated Linux based machine. Its duty is receiving and processing all data from all stations including auxiliary parameters. Server side software is written in PHP and Python. Additionally, it allows remote station configuration and provides web based interface for user friendly interaction. All collected data can be displayed for each day and station. It also allows manual creation of event oriented plots with different filtering abilities and provides numerous status and statistic information. Our solution is very flexible and easy to modify. In this presentation we would like to share our solution and experience. National Science Centre Poland provided financial support for this work via NCN grant DEC-2011/02/A/ST10/00284.

47 CFR 73.403 - Digital audio broadcasting service requirements.

Code of Federal Regulations, 2012 CFR

2012-10-01

... 47 Telecommunication 4 2012-10-01 2012-10-01 false Digital audio broadcasting service requirements... SERVICES RADIO BROADCAST SERVICES Digital Audio Broadcasting § 73.403 Digital audio broadcasting service requirements. (a) Broadcast radio stations using IBOC must transmit at least one over-the-air digital audio...

47 CFR 73.403 - Digital audio broadcasting service requirements.

Code of Federal Regulations, 2011 CFR

2011-10-01

... 47 Telecommunication 4 2011-10-01 2011-10-01 false Digital audio broadcasting service requirements... SERVICES RADIO BROADCAST SERVICES Digital Audio Broadcasting § 73.403 Digital audio broadcasting service requirements. (a) Broadcast radio stations using IBOC must transmit at least one over-the-air digital audio...

47 CFR 73.403 - Digital audio broadcasting service requirements.

Code of Federal Regulations, 2014 CFR

2014-10-01

... 47 Telecommunication 4 2014-10-01 2014-10-01 false Digital audio broadcasting service requirements... SERVICES RADIO BROADCAST SERVICES Digital Audio Broadcasting § 73.403 Digital audio broadcasting service requirements. (a) Broadcast radio stations using IBOC must transmit at least one over-the-air digital audio...

47 CFR 73.403 - Digital audio broadcasting service requirements.

Code of Federal Regulations, 2013 CFR

2013-10-01

... 47 Telecommunication 4 2013-10-01 2013-10-01 false Digital audio broadcasting service requirements... SERVICES RADIO BROADCAST SERVICES Digital Audio Broadcasting § 73.403 Digital audio broadcasting service requirements. (a) Broadcast radio stations using IBOC must transmit at least one over-the-air digital audio...

Antenna unit and radio base station therewith

DOEpatents

Kuwahara, Mikio; Doi, Nobukazu; Suzuki, Toshiro; Ishida, Yuji; Inoue, Takashi; Niida, Sumaru

2007-04-10

Phase and amplitude deviations, which are generated, for example, by cables connecting an array antenna of a CDMA base station and the base station, are calibrated in the baseband. The base station comprises: an antenna apparatus 1; couplers 2; an RF unit 3 that converts a receive signal to a baseband signal, converts a transmit signal to a radio frequency, and performs power control; an A/D converter 4 for converting a receive signal to a digital signal; a receive beam form unit 6 that multiplies the receive signal by semi-fixed weight; a despreader 7 for this signal input; a time-space demodulator 8 for demodulating user data; a despreader 9 for probe signal; a space modulator 14 for user data; a spreader 13 for user signal; a channel combiner 12; a Tx calibrater 11 for controlling calibration of a signal; a D/A converter 10; a unit 16 for calculation of correlation matrix for generating a probe signal used for controlling an Rx calibration system and a TX calibration system; a spreader 17 for probe signal; a power control unit 18; a D/A converter 19; an RF unit 20 for probe signal; an A/D converter 21 for signal from the couplers 2; and a despreader 22.

76 FR 2114 - Notice of Public Information Collection(s) Being Reviewed by the Federal Communications...

Federal Register 2010, 2011, 2012, 2013, 2014

2011-01-12

... Television, Television Translator, and Television Booster Stations and To Amend Rules for Digital Class A... TV translator station operating on a channel from 52-69 is required to eliminate at its expense any... or public safety wireless licensees in the 700 MHz bands. The offending digital LPTV or translator...

Classical and modern control strategies for the deployment, reconfiguration, and station-keeping of the National Aeronautics and Space Administration (NASA) Benchmark Tetrahedron Constellation

NASA Astrophysics Data System (ADS)

Capo-Lugo, Pedro A.

Formation flying consists of multiple spacecraft orbiting in a required configuration about a planet or through Space. The National Aeronautics and Space Administration (NASA) Benchmark Tetrahedron Constellation is one of the proposed constellations to be launched in the year 2009 and provides the motivation for this investigation. The problem that will be researched here consists of three stages. The first stage contains the deployment of the satellites; the second stage is the reconfiguration process to transfer the satellites through different specific sizes of the NASA benchmark problem; and, the third stage is the station-keeping procedure for the tetrahedron constellation. Every stage contains different control schemes and transfer procedures to obtain/maintain the proposed tetrahedron constellation. In the first stage, the deployment procedure will depend on a combination of two techniques in which impulsive maneuvers and a digital controller are used to deploy the satellites and to maintain the tetrahedron constellation at the following apogee point. The second stage that corresponds to the reconfiguration procedure shows a different control scheme in which the intelligent control systems are implemented to perform this procedure. In this research work, intelligent systems will eliminate the use of complex mathematical models and will reduce the computational time to perform different maneuvers. Finally, the station-keeping process, which is the third stage of this research problem, will be implemented with a two-level hierarchical control scheme to maintain the separation distance constraints of the NASA Benchmark Tetrahedron Constellation. For this station-keeping procedure, the system of equations defining the dynamics of a pair of satellites is transformed to take in account the perturbation due to the oblateness of the Earth and the disturbances due to solar pressure. The control procedures used in this research will be transformed from a continuous control system to a digital control system which will simplify the implementation into the computer onboard the satellite. In addition, this research will show an introductory chapter on attitude dynamics that can be used to maintain the orientation of the satellites, and an adaptive intelligent control scheme will be proposed to maintain the desired orientation of the spacecraft. In conclusion, a solution for the dynamics of the NASA Benchmark Tetrahedron Constellation will be presented in this research work. The main contribution of this work is the use of discrete control schemes, impulsive maneuvers, and intelligent control schemes that can be used to reduce the computational time in which these control schemes can be easily implemented in the computer onboard the satellite. These contributions are explained through the deployment, reconfiguration, and station-keeping process of the proposed NASA Benchmark Tetrahedron Constellation.

ICC '86; Proceedings of the International Conference on Communications, Toronto, Canada, June 22-25, 1986, Conference Record. Volumes 1, 2, & 3

NASA Astrophysics Data System (ADS)

Papers are presented on ISDN, mobile radio systems and techniques for digital connectivity, centralized and distributed algorithms in computer networks, communications networks, quality assurance and impact on cost, adaptive filters in communications, the spread spectrum, signal processing, video communication techniques, and digital satellite services. Topics discussed include performance evaluation issues for integrated protocols, packet network operations, the computer network theory and multiple-access, microwave single sideband systems, switching architectures, fiber optic systems, wireless local communications, modulation, coding, and synchronization, remote switching, software quality, transmission, and expert systems in network operations. Consideration is given to wide area networks, image and speech processing, office communications application protocols, multimedia systems, customer-controlled network operations, digital radio systems, channel modeling and signal processing in digital communications, earth station/on-board modems, computer communications system performance evaluation, source encoding, compression, and quantization, and adaptive communications systems.

Usachev and Helms install SSRMS cables

NASA Image and Video Library

2001-03-30

ISS002E5480 (30 March 2001) --- Cosmonaut Yury V. Usachev (foreground), Expedition Two mission commander, and astronaut Susan J. Helms, Expedition Two flight engineer, install cables for the Space Station Remote Manipulator System (SSRMS) or Canadarm2 control panel in preparation for the delivery of the Canadarm2 by the STS-100 crew in April. This image was recorded with a digital still camera.

JPRS Report Science & Technology Europe.

DTIC Science & Technology

1992-09-17

9 Jul 92] 48 HERA Project Gets Green Light for Quark Structure Analysis [DuesseldorfVDI NACHRICHTEN, 12 Jul 92] .... 48 TELECOMMUNICATIONS...communicating with the control station. The demonstrator is the product of research performed at the Robot and Artificial Intel - ligence Unit of...from the microphones, speedometers, or tachometers. Each board is linked to a Motorola DSP [digital signal processor ]. Although the system has been

47 CFR 101.503 - Digital Electronic Message Service Nodal Stations.

Code of Federal Regulations, 2013 CFR

2013-10-01

... DEMS Nodal Station licenses should specify the maximum number of 10.6 GHz DEMS User Stations to be served by that nodal station. Any increase in that number must be applied for pursuant to § 1.913 of this... Stations. 101.503 Section 101.503 Telecommunication FEDERAL COMMUNICATIONS COMMISSION (CONTINUED) SAFETY...

47 CFR 101.503 - Digital Electronic Message Service Nodal Stations.

Code of Federal Regulations, 2014 CFR

2014-10-01

... DEMS Nodal Station licenses should specify the maximum number of 10.6 GHz DEMS User Stations to be served by that nodal station. Any increase in that number must be applied for pursuant to § 1.913 of this... Stations. 101.503 Section 101.503 Telecommunication FEDERAL COMMUNICATIONS COMMISSION (CONTINUED) SAFETY...

47 CFR 101.503 - Digital Electronic Message Service Nodal Stations.

Code of Federal Regulations, 2011 CFR

2011-10-01

... DEMS Nodal Station licenses should specify the maximum number of 10.6 GHz DEMS User Stations to be served by that nodal station. Any increase in that number must be applied for pursuant to § 1.913 of this... Stations. 101.503 Section 101.503 Telecommunication FEDERAL COMMUNICATIONS COMMISSION (CONTINUED) SAFETY...

47 CFR 101.503 - Digital Electronic Message Service Nodal Stations.

Code of Federal Regulations, 2012 CFR

2012-10-01

... DEMS Nodal Station licenses should specify the maximum number of 10.6 GHz DEMS User Stations to be served by that nodal station. Any increase in that number must be applied for pursuant to § 1.913 of this... Stations. 101.503 Section 101.503 Telecommunication FEDERAL COMMUNICATIONS COMMISSION (CONTINUED) SAFETY...

A modern control theory based algorithm for control of the NASA/JPL 70-meter antenna axis servos

NASA Technical Reports Server (NTRS)

Hill, R. E.

1987-01-01

A digital computer-based state variable controller was designed and applied to the 70-m antenna axis servos. The general equations and structure of the algorithm and provisions for alternate position error feedback modes to accommodate intertarget slew, encoder referenced tracking, and precision tracking modes are descibed. Development of the discrete time domain control model and computation of estimator and control gain parameters based on closed loop pole placement criteria are discussed. The new algorithm was successfully implemented and tested in the 70-m antenna at Deep Space Network station 63 in Spain.

Neurobehavioral effects among inhabitants around mobile phone base stations.

PubMed

Abdel-Rassoul, G; El-Fateh, O Abou; Salem, M Abou; Michael, A; Farahat, F; El-Batanouny, M; Salem, E

2007-03-01

There is a general concern on the possible hazardous health effects of exposure to radiofrequency electromagnetic radiations (RFR) emitted from mobile phone base station antennas on the human nervous system. To identify the possible neurobehavioral deficits among inhabitants living nearby mobile phone base stations. A cross-sectional study was conducted on (85) inhabitants living nearby the first mobile phone station antenna in Menoufiya governorate, Egypt, 37 are living in a building under the station antenna while 48 opposite the station. A control group (80) participants were matched with the exposed for age, sex, occupation and educational level. All participants completed a structured questionnaire containing: personal, educational and medical histories; general and neurological examinations; neurobehavioral test battery (NBTB) [involving tests for visuomotor speed, problem solving, attention and memory]; in addition to Eysenck personality questionnaire (EPQ). The prevalence of neuropsychiatric complaints as headache (23.5%), memory changes (28.2%), dizziness (18.8%), tremors (9.4%), depressive symptoms (21.7%), and sleep disturbance (23.5%) were significantly higher among exposed inhabitants than controls: (10%), (5%), (5%), (0%), (8.8%) and (10%), respectively (P<0.05). The NBTB indicated that the exposed inhabitants exhibited a significantly lower performance than controls in one of the tests of attention and short-term auditory memory [Paced Auditory Serial Addition Test (PASAT)]. Also, the inhabitants opposite the station exhibited a lower performance in the problem solving test (block design) than those under the station. All inhabitants exhibited a better performance in the two tests of visuomotor speed (Digit symbol and Trailmaking B) and one test of attention (Trailmaking A) than controls. The last available measures of RFR emitted from the first mobile phone base station antennas in Menoufiya governorate were less than the allowable standard level. Inhabitants living nearby mobile phone base stations are at risk for developing neuropsychiatric problems and some changes in the performance of neurobehavioral functions either by facilitation or inhibition. So, revision of standard guidelines for public exposure to RER from mobile phone base station antennas and using of NBTB for regular assessment and early detection of biological effects among inhabitants around the stations are recommended.

Application of space technologies for the purpose of education at the Belarusian state university

NASA Astrophysics Data System (ADS)

Liashkevich, Siarhey

Application of space technologies for the purpose of education at the Aerospace Educational Center of Belarusian state university is discussed. The aim of the work is to prepare launch of small satellite. Students are expected to participate in the design of control station, systems of communication, earth observation, navigation, and positioning. Benefit of such project-based learning from economical perspective is discussed. At present our training system at the base of EyasSat classroom satellite is used for management of satellite orientation and stabilization system. Principles of video processing, communication technologies and informational security for small spacecraft are developed at the base of Wi9M-2443 developer kit. More recent equipment allows obtaining the skills in digital signal processing at the base of FPGA. Development of ground station includes setup of 2.6 meter diameter dish for L-band, and spiral rotational antennas for UHF and VHF bands. Receiver equipment from National Instruments is used for digital signal processing and signal management.

Kelly and Lawrence in Destiny Laboratory module during berthing of MPLM

NASA Image and Video Library

2005-08-05

ISS011-E-11515 (5 August 2005) --- On the early Friday morning agenda for Astronauts James M. Kelly, pilot, and Wendy B. Lawrence, mission specialist, was important robotics duty at the controls of the Canadarm2 in the U.S. Lab, Destiny, on the International Space Station. Several digital photos in this sequence reveal the focal point of their work on the other end of the arm as the Italian-built Multi-Purpose Logistics Module Raffaello. The MPLM was being moved from its temporary parking place on the Station's Unity node to the payload bay of Discovery. The astronauts had arrived nine days ago with tons of fresh supplies for the Station, and with much effort, replaced that space on Raffaello with unneeded materials from the orbital outpost.

Design and clinical evaluation of a high-capacity digital image archival library and high-speed network for the replacement of cinefilm in the cardiac angiography environment

NASA Astrophysics Data System (ADS)

Cusma, Jack T.; Spero, Laurence A.; Groshong, Bennett R.; Cho, Teddy; Bashore, Thomas M.

1993-09-01

An economical and practical digital solution for the replacement of 35 mm cine film as the archive media in the cardiac x-ray imaging environment has remained lacking to date due to the demanding requirements of high capacity, high acquisition rate, high transfer rate, and a need for application in a distributed environment. A clinical digital image library and network based on the D2 digital video format has been installed in the Duke University Cardiac Catheterization Laboratory. The system architecture includes a central image library with digital video recorders and robotic tape retrieval, three acquisition stations, and remote review stations connected via a serial image network. The library has a capacity for over 20,000 Gigabytes of uncompressed image data, equivalent to records for approximately 20,000 patients. Image acquisition in the clinical laboratories is via a real-time digital interface between the digital angiography system and a local digital recorder. Images are transferred to the library over the serial network at a rate of 14.3 Mbytes/sec and permanently stored for later review. The image library and network are currently undergoing a clinical comparison with cine film for visual and quantitative assessment of coronary artery disease. At the conclusion of the evaluation, the configuration will be expanded to include four additional catheterization laboratories and remote review stations throughout the hospital.

Development of Standard Station Interface for Comprehensive Nuclear Test Ban Treaty Organistation Monitoring Networks

NASA Astrophysics Data System (ADS)

Dricker, I. G.; Friberg, P.; Hellman, S.

2001-12-01

Under the contract with the CTBTO, Instrumental Software Technologies Inc., (ISTI) has designed and developed a Standard Station Interface (SSI) - a set of executable programs and application programming interface libraries for acquisition, authentication, archiving and telemetry of seismic and infrasound data for stations of the CTBTO nuclear monitoring network. SSI (written in C) is fully supported under both the Solaris and Linux operating systems and will be shipped with fully documented source code. SSI consists of several interconnected modules. The Digitizer Interface Module maintains a near-real-time data flow between multiple digitizers and the SSI. The Disk Buffer Module is responsible for local data archival. The Station Key Management Module is a low-level tool for data authentication and verification of incoming signatures. The Data Transmission Module supports packetized near-real-time data transmission from the primary CTBTO stations to the designated Data Center. The AutoDRM module allows transport of seismic and infrasound signed data via electronic mail (auxiliary station mode). The Command Interface Module is used to pass the remote commands to the digitizers and other modules of SSI. A station operator has access to the state-of-health information and waveforms via an the Operator Interface Module. Modular design of SSI will allow painless extension of the software system within and outside the boundaries of CTBTO station requirements. Currently an alpha version of SSI undergoes extensive tests in the lab and onsite.

47 CFR 74.708 - Class A TV and digital Class A TV station protection.

Code of Federal Regulations, 2010 CFR

2010-10-01

... SERVICES Low Power TV, TV Translator, and TV Booster Stations § 74.708 Class A TV and digital Class A TV... § 73.6010 of this chapter. (b) An application to construct a new low power TV, TV translator, or TV... prior to the date the low power TV, TV translator, or TV booster application is filed. (c) Applications...

47 CFR 80.359 - Frequencies for digital selective calling (DSC).

Code of Federal Regulations, 2013 CFR

2013-10-01

... calling frequencies for use by authorized ship and coast stations for general purpose DSC. There are three.... The “Series A” designation includes coast stations along, and ship stations in, the Atlantic Ocean... location of the called station and propagation conditions. Acknowledgement is made on the paired frequency...

47 CFR 80.359 - Frequencies for digital selective calling (DSC).

Code of Federal Regulations, 2012 CFR

2012-10-01

... calling frequencies for use by authorized ship and coast stations for general purpose DSC. There are three.... The “Series A” designation includes coast stations along, and ship stations in, the Atlantic Ocean... location of the called station and propagation conditions. Acknowledgement is made on the paired frequency...

47 CFR 80.359 - Frequencies for digital selective calling (DSC).

Code of Federal Regulations, 2014 CFR

2014-10-01

... calling frequencies for use by authorized ship and coast stations for general purpose DSC. There are three.... The “Series A” designation includes coast stations along, and ship stations in, the Atlantic Ocean... location of the called station and propagation conditions. Acknowledgement is made on the paired frequency...

Optimizing digital elevation models (DEMs) accuracy for planning and design of mobile communication networks

NASA Astrophysics Data System (ADS)

Hassan, Mahmoud A.

2004-02-01

Digital elevation models (DEMs) are important tools in the planning, design and maintenance of mobile communication networks. This research paper proposes a method for generating high accuracy DEMs based on SPOT satellite 1A stereo pair images, ground control points (GCP) and Erdas OrthoBASE Pro image processing software. DEMs with 0.2911 m mean error were achieved for the hilly and heavily populated city of Amman. The generated DEM was used to design a mobile communication network resulted in a minimum number of radio base transceiver stations, maximum number of covered regions and less than 2% of dead zones.

47 CFR 32.5999 - General.

Code of Federal Regulations, 2014 CFR

2014-10-01

... switching expense 6210 Non-digital switching expense 6211 Digital electronic switching expense 6212... Circuit equipment expense 6232 Information origination/termination expense 6310 Station apparatus expense...

47 CFR 32.5999 - General.

Code of Federal Regulations, 2012 CFR

2012-10-01

... switching expense 6210 Non-digital switching expense 6211 Digital electronic switching expense 6212... Circuit equipment expense 6232 Information origination/termination expense 6310 Station apparatus expense...

47 CFR 32.5999 - General.

Code of Federal Regulations, 2013 CFR

2013-10-01

... switching expense 6210 Non-digital switching expense 6211 Digital electronic switching expense 6212... Circuit equipment expense 6232 Information origination/termination expense 6310 Station apparatus expense...

Cupola with Shutters Open

NASA Image and Video Library

2010-02-17

S130-E-009694 (17 Feb. 2010) --- This image is among the initial series taken through a first of its kind “bay window” on the International Space Station, the seven-windowed Cupola. The image shows small clouds over a light blue background. The image was recorded with a digital still camera using a 19mm lens setting. The Cupola, which a week and half ago was brought up to the orbital outpost by the STS-130 crew on the space shuttle Endeavour, will house controls for the station robotics and will be a location where crew members can operate the robotic arms and monitor other exterior activities.

Test and calibration of the Digital World-Wide Standardized Seismograph

USGS Publications Warehouse

Peterson, Jon; Hutt, Charles R.

1982-01-01

During the past decade there has been steady progress in the modernization of the global seismograph network operated by the U.S. Geological Survey (USGS). The World-Wide Standardized Seismograph Network (WWSSN) has been augmented by new stations with advanced instrumentation, including the Seismic Research Observatories (SRO) and the modified High-Gain Long-Period (ASRO) stations. One goal in the modernization effort has been to improve signal resolution in the long-period band. A second goal has been to generate a global digital data base to support contemporary computer-based analysis and research. In 1976, a Panel on Seismograph Networks was established by the Committee on Seismology of the National Academy of Sciences to review progress in network seismology and recommend actions that would lead to an improved global data base for seismology. One recommendation in the Panel report (Engdahl, 1977) called for upgrading selected WWSSN stations by the installation of digital recorders. This was viewed as an economical way of expanding the digital network, which had proven itself to be a very promising new tool for earthquake and explosion research. Funds for the development and assembly of 15 digital recorders were provided to the USGS by the Defense Advanced Research Projects Agency and an ad Inoc panel of scientists was convened by the Committee on Seismology to advise the USGS on the selection of stations to be upgraded and on data recording requirements, A total of 19 digital World-Wide Standardized Seismograph (DWWSS) systems will be operational when all are installed. The additional systems were made available through purchase by the USGS and other organizations; for example, the University of Bergen purchased and installed a DWWSS-type recorder and agreed to furnish the USGS with the data. A list of operational and planned DWWSS network stations is given in Table 1.1.As one might expect, the digital recorder turned out to be somewhat more sophisticated than the original concept. It was decided to record three components of long-period data continuously, three components of intermediateperiod data in an event mode, and the vertical-component short-period data in and event mode (with the capability of adding short-period horizontal channels in the future). Special amplifiers were developed for use with the WWSS seismometers, and a 16-bit fixed-point analog-to-digital converter was chosen to provide increased resolution (as opposed to a 16-bit gain-ranged encoder). The microprocessor-based digital recording systems were developed and assembled at the USGS Albuquerque Seismological Laboratory (ASL) and ASL-based technicians began installation at WWSSN stations in 1980.The current and proposed locations of the DWWSSN stations, together with other stations in the Global Digital Seismograph Network (GDSN), are shown on the map in Figure 1.1. A system was operated at Albuquerque for about 18 months, serving as a test bed for evaluation studies. Although the network hardware has been available for some time, the installation of the DWWSSN has proceeded slowly. The National Science Foundation supported installation of six stations and the USGS is funding installation of most of the others; however, the network completion date is conjectural because of funding uncertainties.The DWWSSN stations are supported with supplies and technical assistance from ASL (subject to availability of funds). Data recorded on magnetic tapes are mailed to ASL where they are reviewed for quality, then merged with other GDSN station data on the network-day tapes. Hoffman (1980) provides a description of the network-day tape format. Zirbes and Buland (1981) have developed and published user software for reading and interpreting the day tapes. This report will serve several purposes. One is to provide nominal system transfer functions and calibration information that are needed in the analysis of DWWSSN data. A second purpose is to report on an evaluation of operating characteristics (calibration stability, noise levels, and linearity) that may limit the usefulness of the data and to determine if modifications may be needed to improve the data. It is not an exhaustive study in this respect. We continue to depend mostly on data user feedback to point out deficiencies and we solicit comments whenever anomalies are observed in the data.

Concept for a lunar array for very low frequency radio astronomy

NASA Technical Reports Server (NTRS)

Marsh, Kenneth A.; Mahoney, Michael J.; Kuiper, Thomas B. H.; Jones, Dayton L.

1992-01-01

We discuss the design considerations relevant to a very low frequency array, to be deployed on the lunar near side during an early expedition. Such an array would operate in the frequency range 1-10 MHz, and would consist nominally of 20 antennas distributed over a region approximately 40 km in extent. Each antenna station would consist of a crossed-dipole antenna, together with a receiver, digitizer, solar cells, and batteries. In addition, the station will contain a UHF transmitter for relaying the digitized signal to a central station where it will be transmitted to Earth for subsequent processing, including cross-correlation with signals from other antennas. Each antenna station (including the central station) would be deployed as a self-contained unit, mounted on a miniature robotic vehicle. No fixed structures are required for the array.

76 FR 61358 - Information Collections Being Submitted for Review and Approval to the Office of Management and...

Federal Register 2010, 2011, 2012, 2013, 2014

2011-10-04

... Digital Low Power Television Translator, and Television Booster Stations and to Amend Rules for Digital...'') to transition from analog to digital broadcasting and states that low power television, TV translator...; Section 74.788; Low Power Television, TV Translator and Class A Television Digital Transition...

A computerized aircraft battery servicing facility

NASA Technical Reports Server (NTRS)

Glover, Richard D.

1992-01-01

The latest upgrade to the Aerospace Energy Systems Laboratory (AESL) is described. The AESL is a distributed digital system consisting of a central system and battery servicing stations connected by a high-speed serial data bus. The entire system is located in two adjoining rooms; the bus length is approximately 100 ft. Each battery station contains a digital processor, data acquisition, floppy diskette data storage, and operator interfaces. The operator initiates a servicing task and thereafter the battery station monitors the progress of the task and terminates it at the appropriate time. The central system provides data archives, manages the data bus, and provides a timeshare interface for multiple users. The system also hosts software production tools for the battery stations and the central system.

Goldstone R/D High Speed Data Acquisition System

NASA Technical Reports Server (NTRS)

Deutsch, L. J.; Jurgens, R. F.; Brokl, S. S.

1984-01-01

A digital data acquisition system that meets the requirements of several users (initially the planetary radar program) is planned for general use at Deep Space Station 14 (DSS 14). The system, now partially complete, is controlled by VAX 11/780 computer that is programmed in high level languages. A DEC Data Controller is included for moderate-speed data acquisition, low speed data display, and for a digital interface to special user-provided devices. The high-speed data acquisition is performed in devices that are being designed and built at JPL. Analog IF signals are converted to a digitized 50 MHz real signal. This signal is filtered and mixed digitally to baseband after which its phase code (a PN sequence in the case of planetary radar) is removed. It may then be accumulated (or averaged) and fed into the VAX through an FPS 5210 array processor. Further data processing before entering the VAX is thus possible (computation and accumulation of the power spectra, for example). The system is to be located in the research and development pedestal at DSS 14 for easy access by researchers in radio astronomy as well as telemetry processing and antenna arraying.

Analysis of recently digitized continuous seismic data recorded during the March-May, 1980, eruption sequence at Mount St. Helens

NASA Astrophysics Data System (ADS)

Moran, S. C.; Malone, S. D.

2013-12-01

The May 18, 1980, eruption of Mount St. Helens (MSH) was an historic event, both for society and for the field of volcanology. However, our knowledge of the eruption and the precursory period leading up it is limited by the fact that most of the data, particularly seismic recordings, were not kept due to severe limitations in the amount of digital data that could be handled and stored using 1980 computer technology. Because of these limitations, only about 900 digital event files have been available for seismic studies of the March-May seismic sequence out of a total of more than 4,000 events that were counted using paper records. Fortunately, data from a subset of stations were also recorded continuously on a series of 24 analog 14-track IRIG magnetic tapes. We have recently digitized these tapes and time-corrected and cataloged the resultant digital data streams, enabling more in-depth studies of the (almost) complete pre-eruption seismic sequence using modern digital processing techniques. Of the fifteen seismic stations operating near MSH for at least a part of the two months between March 20 and May 18, six stations have relatively complete analog recordings. These recordings have gaps of minutes to days because of radio noise, poor tape quality, or missing tapes. In addition, several other stations have partial records. All stations had short-period vertical-component sensors with very limited dynamic range and unknown response details. Nevertheless, because the stations were at a range of distances and were operated at a range of gains, a variety of earthquake sizes were recorded on scale by at least one station, and therefore a much more complete understanding of the evolution of event types, sizes and character should be achievable. In our preliminary analysis of this dataset we have found over 10,000 individual events as recorded on stations 35-40 km from MSH, spanning a recalculated coda-duration magnitude range of ~1.5 to 4.1, including many M < 3.0 events that are not part of the PNSN catalog. The closest stations (2-7 km from the summit) recorded several times as many events as the more remote stations during the times they were operational, although many signals are clipped. We see a range of event types including long-period events, tremor, and occasional volcano-tectonic earthquakes. The latter group includes small volcano-tectonic events that occurred at depths of > 7 km during the crypto-dome intrusion phase, which were recognized in 1980 but not fully described. In our analysis of the hours to days prior to the May 18 eruption, we find no obvious changes in seismicity that could have been interpreted as a short-term precursor to the May 18 eruption initiation. This new dataset is currently being formatted for permanent archiving in the IRIS Data Management Center, where it will be available for anyone to use.

Laying the foundation for a digital Nova Scotia

NASA Astrophysics Data System (ADS)

Bond, J.

2016-04-01

In 2013, the Province of Nova Scotia began an effort to modernize its coordinate referencing infrastructure known as the Nova Scotia Coordinate Referencing System (NSCRS). At that time, 8, active GPS stations were installed in southwest Nova Scotia to evaluate the technology's ability to address the Province's coordinate referencing needs. The success of the test phase helped build a business case to implement the technology across the entire Province. It is anticipated that by the end of 2015, 40 active GPS stations will be in place across Nova Scotia. This infrastructure, known as the Nova Scotia Active Control Stations (NSACS) network, will allow for instantaneous, centimetre level positioning across the Province. Originally designed to address the needs of the surveying community, the technology has also proven to have applications in mapping, machine automation, agriculture, navigation, emergency response, earthquake detection and other areas. In the foreseeable future, all spatial data sets captured in Nova Scotia will be either directly or indirectly derived from the NSACS network. The technology will promote high accuracy and homogenous spatial data sets across the Province. The technology behind the NSACS and the development of the system are described. Examples of how the technology is contributing to a digital Nova Scotia are presented. Future applications of the technology are also considered.

47 CFR 11.2 - Definitions.

Code of Federal Regulations, 2011 CFR

2011-10-01

... television stations, and wired and wireless cable television systems, DBS, DTV, SDARS, digital cable and DAB, and wireline video systems. (d) Wireline Video System. The system of a wireline common carrier used to provide video programming service. (e) Participating National (PN). PN stations are broadcast stations...

47 CFR 74.789 - Broadcast regulations applicable to digital low power television and television translator stations.

Code of Federal Regulations, 2011 CFR

2011-10-01

... AND OTHER PROGRAM DISTRIBUTIONAL SERVICES Low Power TV, TV Translator, and TV Booster Stations § 74... applicable to translators, low power, and booster stations (except § 73.653—Operation of TV aural and visual...

47 CFR 74.789 - Broadcast regulations applicable to digital low power television and television translator stations.

Code of Federal Regulations, 2013 CFR

2013-10-01

... AND OTHER PROGRAM DISTRIBUTIONAL SERVICES Low Power TV, TV Translator, and TV Booster Stations § 74... applicable to translators, low power, and booster stations (except § 73.653—Operation of TV aural and visual...

47 CFR 74.789 - Broadcast regulations applicable to digital low power television and television translator stations.

Code of Federal Regulations, 2014 CFR

2014-10-01

... AND OTHER PROGRAM DISTRIBUTIONAL SERVICES Low Power TV, TV Translator, and TV Booster Stations § 74... applicable to translators, low power, and booster stations (except § 73.653—Operation of TV aural and visual...

47 CFR 74.789 - Broadcast regulations applicable to digital low power television and television translator stations.

Code of Federal Regulations, 2012 CFR

2012-10-01

... AND OTHER PROGRAM DISTRIBUTIONAL SERVICES Low Power TV, TV Translator, and TV Booster Stations § 74... applicable to translators, low power, and booster stations (except § 73.653—Operation of TV aural and visual...

47 CFR 11.2 - Definitions.

Code of Federal Regulations, 2010 CFR

2010-10-01

... a nationwide network of broadcast stations and other entities connected with government activation... television stations, and wired and wireless cable television systems, DBS, DTV, SDARS, digital cable and DAB...

Digitization Procedures of Analogue Seismograms from the Adam Dziewonski Observatory (HRV) at Harvard, MA

NASA Astrophysics Data System (ADS)

Torpey, M.; Ishii, M.

2010-12-01

This project explores methods of digitization of analogue seismic recordings for better preservation and to facilitate data distribution to the community. Different techniques are investigated using seismograms from one particular station, the Adam Dziewonski Observatory (HRV) at Harvard, Massachusetts. This seismological station, still in operation as a part of the Global Seismographic Network today, is one of the oldest stations in the United States. The station was built in 1933, and since its installation, the station has produced approximately 16,000 analogue seismograms. The majority of these recordings were taken between 1933 and 1953, with some intermittent recordings between 1962 and 1998 after digital seismometers had become a standard. These analogue seismograms have the potential of expanding the database for seismological research such as identification of events previously not catalogued. Due to poor storage environment at the station, some of the records, especially those on regular type of paper, are damaged beyond repair. Nevertheless, many of the records on photographic paper are in better condition, and we have focused on a subset of these recordings that are least damaged. Even these seismograms require cleaning and, in consultation with the Weissman Preservation Center of Harvard Library, preparation techniques for the photographic records are examined. After the seismograms are cleaned and flattened, three different equipments are investigated for digitization, i.e., a copy machine, scanner, and camera. These instruments allow different imaging resolutions, ranging from 200 dots per inch (dpi) to 800 dpi. The image resolution and the bit depth have a wide range of implications that are closely linked to the digitization program one chooses to convert the image to time series. We explore three different software for this conversion, SeisDig (Bromirski and Chuang, 2003), Teseo2 (Pintore and Quintiliani, 2008), and NeuraLog (www.neuralog.com), and determine advantages and disadvantages associated with each software. One of the important features of the software is the automatic tracing algorithms. The success of the automatic tracing depends upon many factors, and this is examined using examples from long and short period recordings with high amplitude (thin and fading lines), and long and short period recordings with low amplitude (well-defined lines). Automatically traced data are also compared to manually traced samples. Based upon these results, we propose a set of procedures and recommendations for cleaning, imaging scheme including resolution and bit depth, and digitization software. Ultimately, we would like to outline a robust procedure for mass seismogram digitization and process all the Harvard station recordings and make them available to the community through the IRIS Data Management Center.

Development of the Langmuir Electric Field Array (LEFA)

NASA Astrophysics Data System (ADS)

Sonnenfeld, R. G.; Eack, K.; Eastvedt, E.; Edens, H. E.; Hager, W. W.; Hunyady, S.; Alvidrez, V.; Lapierre, J.; Morris, K.; Vaive, G.; Wang, T.; Zhang, J.

2009-12-01

An electric-field-change (ΔE) sensor (also called a ``slow antenna'') is a long proven instrument in atmospheric electricity research. While there is still value to be derived from single-station measurements of ΔE, multi-station measurements better constrain the data interpretation. Modern publications still cite the work of Krehbiel [et al] for the insights gleaned from the 8-station array they deployed in 1979. In particular, with four independent measurements, one can locate the center of charge discharged in a cloud-to-ground (CG) flash. With seven measurements, one can locate the two charge centers connected during an intra-cloud (IC) flash. The measurements become more interesting when multi-station ΔE data is combined with radio-frequency emission data from a lightning mapping array (LMA). The ΔE array allows an independent check of the assumptions about charge layers made in the interpretation of LMA data, as well as giving greater visibility into the effects of positive streamers. The Langmuir Electric Field Array (LEFA) is designed to accommodate the very large amplitude range of ΔE data characteristic of lightning. Such design is more important in an array than a single station, as the goal is explicitly to correlate data from ten stations spaced some kilometers apart. To address the dynamic range challenge, every ΔE sensor is a set of three independent sensors, integrated into a 19-inch-steel-mixing bowl. The electronic gain is a factor of 4 greater for the sensitive (S) channel than for the medium (M) channel, and 20X greater for the (S) channel compared to the insensitive (I) channel. Further, the electrode sensor areas decrease by factors of 5, moving from S, to M, to I, so that the (S) channel is hundreds of times more sensitive than the (I) channel. Since each channel is digitized with 16-bits of resolution, the ideal full range of the instrument is roughly equal to a single channel digitized at 24 bits. Digitizing the same signal at three sensitivities also turns out to be useful in identifying noise sources and separating unusual ΔE effects from instrumental noise. The LEFA was also designed for rapid data integration and processing. All three channels of ΔE data are continuously digitized with embedded PC-104 computers (along with timing data) at 50 kSamples/second and streamed to large hard-drives. Instruments are linked by a 802.11 wireless network, and a network broadcast protocol enables central control. During fair-weather, the controller tells all instruments to shut down and to do a first pass analysis of their own data, discarding periods of electrical inactivity, and imaging all interesting data. While the full precision data occupies 24~Mbytes/minute, the quick images are 20~kBytes/min, and are automatically uploaded to a web-server. We learned over a summer of operation that this method is workable, and allows one student to wrangle the data from the entire network. We are currently working toward a full deployment, hopefully before local electrical activity ends for the season.

47 CFR 73.6020 - Protection of stations in the land mobile radio service.

Code of Federal Regulations, 2010 CFR

2010-10-01

... stations in the land mobile radio service. An application for digital operation of an existing Class A TV... 47 Telecommunication 4 2010-10-01 2010-10-01 false Protection of stations in the land mobile radio... accepted if it fails to protect stations in the land mobile radio service pursuant to the requirements...

78 FR 37809 - Information Collections Being Reviewed by the Federal Communications Commission Under Delegated...

Federal Register 2010, 2011, 2012, 2013, 2014

2013-06-24

... licensees of low power TV or TV translator stations to send written notification to the FCC of equipment...(d) requires that licensees of low power TV or TV translator stations place in the station records a....793(d) requires that digital low power and TV translator stations shall be required to submit...

47 CFR 73.1201 - Station identification.

Code of Federal Regulations, 2010 CFR

2010-10-01

... offerings. Television and Class A television broadcast stations may make these announcements visually or... multicast audio programming streams, in a manner that appropriately alerts its audience to the fact that it is listening to a digital audio broadcast. No other insertion between the station's call letters and...

Cupola windows during Joint Operations

NASA Image and Video Library

2010-02-17

ISS022-E-066963 (17 Feb. 2010) --- This image is among the first taken through a first of its kind ?bay window? on the International Space Station, the seven-windowed Cupola. The image shows the coast of Algeria featuring (in the Cupola?s round window) an area between the cities of Dellys and Algiers. The image was recorded with a digital still camera using a 28mm lens setting. The Cupola, which a week and half ago was brought up to the orbital outpost by the STS-130 crew on the space shuttle Endeavour, will house controls for the station robotics and will be a location where crew members can operate the robotic arms and monitor other exterior activities.

KSC-07pd1271

NASA Image and Video Library

2007-05-24

KENNEDY SPACE CENTER, FLA. -- In Space Shuttle Maine Engine Shop, workers get ready to install an engine controller in one of the three main engines (behind them) of the orbiter Discovery. The controller is an electronics package mounted on each space shuttle main engine. It contains two digital computers and the associated electronics to control all main engine components and operations. The controller is attached to the main combustion chamber by shock-mounted fittings. Discovery is the designated orbiter for mission STS-120 to the International Space Station. It will carry a payload that includes the Node 2 module, named Harmony. Launch is targeted for no earlier than Oct. 20. Photo credit: NASA/Cory Huston

KSC-07pd1272

NASA Image and Video Library

2007-05-24

KENNEDY SPACE CENTER, FLA. -- In the Space Shuttle Maine Engine Shop, workers are installing an engine controller in one of the three main engines of the orbiter Discovery. The controller is an electronics package mounted on each space shuttle main engine. It contains two digital computers and the associated electronics to control all main engine components and operations. The controller is attached to the main combustion chamber by shock-mounted fittings. Discovery is the designated orbiter for mission STS-120 to the International Space Station. It will carry a payload that includes the Node 2 module, named Harmony. Launch is targeted for no earlier than Oct. 20. Photo credit: NASA/Cory Huston

KSC-07pd1274

NASA Image and Video Library

2007-05-24

KENNEDY SPACE CENTER, FLA. -- In the Space Shuttle Maine Engine Shop, workers check the installation of an engine controller in one of the three main engines of the orbiter Discovery. The controller is an electronics package mounted on each space shuttle main engine. It contains two digital computers and the associated electronics to control all main engine components and operations. The controller is attached to the main combustion chamber by shock-mounted fittings. Discovery is the designated orbiter for mission STS-120 to the International Space Station. It will carry a payload that includes the Node 2 module, named Harmony. Launch is targeted for no earlier than Oct. 20. Photo credit: NASA/Cory Huston

KSC-07pd1273

NASA Image and Video Library

2007-05-24

KENNEDY SPACE CENTER, FLA. -- In the Space Shuttle Maine Engine Shop, workers are installing an engine controller in one of the three main engines of the orbiter Discovery. The controller is an electronics package mounted on each space shuttle main engine. It contains two digital computers and the associated electronics to control all main engine components and operations. The controller is attached to the main combustion chamber by shock-mounted fittings. Discovery is the designated orbiter for mission STS-120 to the International Space Station. It will carry a payload that includes the Node 2 module, named Harmony. Launch is targeted for no earlier than Oct. 20. Photo credit: NASA/Cory Huston

KSC-07pd1270

NASA Image and Video Library

2007-05-24

KENNEDY SPACE CENTER, FLA. -- In the Space Shuttle Maine Engine Shop, workers get ready to install an engine controller in one of the three main engines of the orbiter Discovery. The controller is an electronics package mounted on each space shuttle main engine. It contains two digital computers and the associated electronics to control all main engine components and operations. The controller is attached to the main combustion chamber by shock-mounted fittings. Discovery is the designated orbiter for mission STS-120 to the International Space Station. It will carry a payload that includes the Node 2 module, named Harmony. Launch is targeted for no earlier than Oct. 20. Photo credit: NASA/Cory Huston

Data acquisition and processing history for the Explorer 33 (AIMP-D) satellite

NASA Technical Reports Server (NTRS)

Karras, T. J.

1972-01-01

The quality control monitoring system, using accounting and quality control data bases, made it possible to perform an in-depth analysis. Results show that the percentage of useable data files for experimenter analysis was 97.7%; only 0.4% of the data sequences supplied to the experimenter exhibited missing data. The 50 percentile probability delay values (referenced to station record data) indicate that the analog tapes arrived within 11 days, the data were digitized within 4.2 weeks, and the experimenter tapes were delivered in 8.95 weeks or less.

Display integration for ground combat vehicles

NASA Astrophysics Data System (ADS)

Busse, David J.

1998-09-01

The United States Army's requirement to employ high resolution target acquisition sensors and information warfare to increase its dominance over enemy forces has led to the need to integrate advanced display devices into ground combat vehicle crew stations. The Army's force structure require the integration of advanced displays on both existing and emerging ground combat vehicle systems. The fielding of second generation target acquisition sensors, color digital terrain maps and high volume digital command and control information networks on these platforms define display performance requirements. The greatest challenge facing the system integrator is the development and integration of advanced displays that meet operational, vehicle and human computer interface performance requirements for the ground combat vehicle fleet. The subject of this paper is to address those challenges: operational and vehicle performance, non-soldier centric crew station configurations, display performance limitations related to human computer interfaces and vehicle physical environments, display technology limitations and the Department of Defense (DOD) acquisition reform initiatives. How the ground combat vehicle Program Manager and system integrator are addressing these challenges are discussed through the integration of displays on fielded, current and future close combat vehicle applications.

47 CFR 80.359 - Frequencies for digital selective calling (DSC).

Code of Federal Regulations, 2011 CFR

2011-10-01

... 47 Telecommunication 5 2011-10-01 2011-10-01 false Frequencies for digital selective calling (DSC... for digital selective calling (DSC). (a) General purpose calling. The following table describes the calling frequencies for use by authorized ship and coast stations for general purpose DSC. There are three...

75 FR 34782 - Exelon Generation Company, LLC, Braidwood Station, Independent Spent Fuel Installation Order...

Federal Register 2010, 2011, 2012, 2013, 2014

2010-06-18

..., to request (1) a digital ID certificate, which allows the participant (or its counsel or... NRC- issued digital ID certificate). Based upon this information, the Secretary will establish an... electronic docket. Information about applying for a digital ID certificate is available on NRC's public Web...

47 CFR 73.404 - Interim hybrid IBOC DAB operation.

Code of Federal Regulations, 2010 CFR

2010-10-01

... RADIO BROADCAST SERVICES Digital Audio Broadcasting § 73.404 Interim hybrid IBOC DAB operation. (a) The... test operation pursuant to § 73.1620, may commence interim hybrid IBOC DAB operation with digital... No. 99-325. FM stations are permitted to operate with hybrid digital effective radiated power equal...

Digital Motion Imagery, Interoperability Challenges for Space Operations

NASA Technical Reports Server (NTRS)

Grubbs, Rodney

2012-01-01

With advances in available bandwidth from spacecraft and between terrestrial control centers, digital motion imagery and video is becoming more practical as a data gathering tool for science and engineering, as well as for sharing missions with the public. The digital motion imagery and video industry has done a good job of creating standards for compression, distribution, and physical interfaces. Compressed data streams can easily be transmitted or distributed over radio frequency, internet protocol, and other data networks. All of these standards, however, can make sharing video between spacecraft and terrestrial control centers a frustrating and complicated task when different standards and protocols are used by different agencies. This paper will explore the challenges presented by the abundance of motion imagery and video standards, interfaces and protocols with suggestions for common formats that could simplify interoperability between spacecraft and ground support systems. Real-world examples from the International Space Station will be examined. The paper will also discuss recent trends in the development of new video compression algorithms, as well likely expanded use of Delay (or Disruption) Tolerant Networking nodes.

78 FR 28749 - Private Land Mobile Radio Stations Below 800 MHz

Federal Register 2010, 2011, 2012, 2013, 2014

2013-05-16

... private land mobile radio (PLMR) licensing, including increasing the power limit for end-of-train devices, modifying trunking rules for PLMR stations below 800 MHz, and permitting digital transmission of station... provide clear and concise rules that facilitate new wireless technologies, devices and services, and are...

75 FR 64729 - Notice of Public Information Collection(s) Being Reviewed by the Federal Communications...

Federal Register 2010, 2011, 2012, 2013, 2014

2010-10-20

... Rules to Establish Rules for Digital Low Power Television Translator, Television Booster Stations, and... power television (``LPTV'') and television translator (``TV translator'') stations and modifies certain... to this collection (namely, ``low power television, TV translator, and Class A television station DTV...

Experiences with semiautomatic aerotriangulation on digital photogrammetric stations

NASA Astrophysics Data System (ADS)

Kersten, Thomas P.; Stallmann, Dirk

1995-12-01

With the development of higher-resolution scanners, faster image-handling capabilities, and higher-resolution screens, digital photogrammetric workstations promise to rival conventional analytical plotters in functionality, i.e. in the degree of automation in data capture and processing, and in accuracy. The availability of high quality digital image data and inexpensive high capacity fast mass storage offers the capability to perform accurate semi- automatic or automatic triangulation of digital aerial photo blocks on digital photogrammetric workstations instead of analytical plotters. In this paper, we present our investigations and results on two photogrammetric triangulation blocks, the OEEPE (European Organisation for Experimental Photogrammetric Research) test block (scale 1;4'000) and a Swiss test block (scale 1:12'000) using digitized images. Twenty-eight images of the OEEPE test block were scanned on the Zeiss/Intergraph PS1 and the digital images were delivered with a resolution of 15 micrometer and 30 micrometer, while 20 images of the Swiss test block were scanned on the Desktop Publishing Scanner Agfa Horizon with a resolution of 42 micrometer and on the PS1 with 15 micrometer. Measurements in the digital images were performed on the commercial Digital photogrammetric Station Leica/Helava DPW770 and with basic hard- and software components of the Digital Photogrammetric Station DIPS II, an experimental system of the Institute of Geodesy and Photogrammetry, ETH Zurich. As a reference, the analog images of both photogrammetric test blocks were measured at analytical plotters. On DIPS II measurements of fiducial marks, signalized and natural tie points were performed by least squares template and image matching, while on DPW770 all points were measured by the cross correlation technique. The observations were adjusted in a self-calibrating bundle adjustment. The comparisons between these results and the experiences with the functionality of the commercial and the experimental system are presented.

An XML-based method for astronomy software designing

NASA Astrophysics Data System (ADS)

Liao, Mingxue; Aili, Yusupu; Zhang, Jin

XML-based method for standardization of software designing is introduced and analyzed and successfully applied to renovating the hardware and software of the digital clock at Urumqi Astronomical Station. Basic strategy for eliciting time information from the new digital clock of FT206 in the antenna control program is introduced. By FT206, the need to compute how many centuries passed since a certain day with sophisticated formulas is eliminated and it is no longer necessary to set right UT time for the computer holding control over antenna because the information about year, month, day are all deduced from Julian day dwelling in FT206, rather than from computer time. With XML-based method and standard for software designing, various existing designing methods are unified, communications and collaborations between developers are facilitated, and thus Internet-based mode of developing software becomes possible. The trend of development of XML-based designing method is predicted.

Modeling of the ground-to-SSFMB link networking features using SPW

NASA Technical Reports Server (NTRS)

Watson, John C.

1993-01-01

This report describes the modeling and simulation of the networking features of the ground-to-Space Station Freedom manned base (SSFMB) link using COMDISCO signal processing work-system (SPW). The networking features modeled include the implementation of Consultative Committee for Space Data Systems (CCSDS) protocols in the multiplexing of digitized audio and core data into virtual channel data units (VCDU's) in the control center complex and the demultiplexing of VCDU's in the onboard baseband signal processor. The emphasis of this work has been placed on techniques for modeling the CCSDS networking features using SPW. The objectives for developing the SPW models are to test the suitability of SPW for modeling networking features and to develop SPW simulation models of the control center complex and space station baseband signal processor for use in end-to-end testing of the ground-to-SSFMB S-band single access forward (SSAF) link.

Software Graphical User Interface For Analysis Of Images

NASA Technical Reports Server (NTRS)

Leonard, Desiree M.; Nolf, Scott R.; Avis, Elizabeth L.; Stacy, Kathryn

1992-01-01

CAMTOOL software provides graphical interface between Sun Microsystems workstation and Eikonix Model 1412 digitizing camera system. Camera scans and digitizes images, halftones, reflectives, transmissives, rigid or flexible flat material, or three-dimensional objects. Users digitize images and select from three destinations: work-station display screen, magnetic-tape drive, or hard disk. Written in C.

47 CFR 74.796 - Modification of digital transmission systems and analog transmission systems for digital operation.

Code of Federal Regulations, 2010 CFR

2010-10-01

... AND OTHER PROGRAM DISTRIBUTIONAL SERVICES Low Power TV, TV Translator, and TV Booster Stations § 74... translator transmission systems and the modification of existing analog transmission systems for digital... specifically refitted or replaced to operate at a higher power. (3) Analog heterodyne translators, when...

Modernization of B-2 Data, Video, and Control Systems Infrastructure

NASA Technical Reports Server (NTRS)

Cmar, Mark D.; Maloney, Christian T.; Butala, Vishal D.

2012-01-01

The National Aeronautics and Space Administration (NASA) Glenn Research Center (GRC) Plum Brook Station (PBS) Spacecraft Propulsion Research Facility, commonly referred to as B-2, is NASA s third largest thermal-vacuum facility with propellant systems capability. B-2 has completed a modernization effort of its facility legacy data, video and control systems infrastructure to accommodate modern integrated testing and Information Technology (IT) Security requirements. Integrated systems tests have been conducted to demonstrate the new data, video and control systems functionality and capability. Discrete analog signal conditioners have been replaced by new programmable, signal processing hardware that is integrated with the data system. This integration supports automated calibration and verification of the analog subsystem. Modern measurement systems analysis (MSA) tools are being developed to help verify system health and measurement integrity. Legacy hard wired digital data systems have been replaced by distributed Fibre Channel (FC) network connected digitizers where high speed sampling rates have increased to 256,000 samples per second. Several analog video cameras have been replaced by digital image and storage systems. Hard-wired analog control systems have been replaced by Programmable Logic Controllers (PLC), fiber optic networks (FON) infrastructure and human machine interface (HMI) operator screens. New modern IT Security procedures and schemes have been employed to control data access and process control flows. Due to the nature of testing possible at B-2, flexibility and configurability of systems has been central to the architecture during modernization.

Modernization of B-2 Data, Video, and Control Systems Infrastructure

NASA Technical Reports Server (NTRS)

Cmar, Mark D.; Maloney, Christian T.; Butala, Vishal D.

2012-01-01

The National Aeronautics and Space Administration (NASA) Glenn Research Center (GRC) Plum Brook Station (PBS) Spacecraft Propulsion Research Facility, commonly referred to as B-2, is NASA's third largest thermal-vacuum facility with propellant systems capability. B-2 has completed a modernization effort of its facility legacy data, video and control systems infrastructure to accommodate modern integrated testing and Information Technology (IT) Security requirements. Integrated systems tests have been conducted to demonstrate the new data, video and control systems functionality and capability. Discrete analog signal conditioners have been replaced by new programmable, signal processing hardware that is integrated with the data system. This integration supports automated calibration and verification of the analog subsystem. Modern measurement systems analysis (MSA) tools are being developed to help verify system health and measurement integrity. Legacy hard wired digital data systems have been replaced by distributed Fibre Channel (FC) network connected digitizers where high speed sampling rates have increased to 256,000 samples per second. Several analog video cameras have been replaced by digital image and storage systems. Hard-wired analog control systems have been replaced by Programmable Logic Controllers (PLC), fiber optic networks (FON) infrastructure and human machine interface (HMI) operator screens. New modern IT Security procedures and schemes have been employed to control data access and process control flows. Due to the nature of testing possible at B-2, flexibility and configurability of systems has been central to the architecture during modernization.

47 CFR 80.207 - Classes of emission.

Code of Federal Regulations, 2013 CFR

2013-10-01

... radiotelephone and radiotelegraph emissions by ship and coast stations includes the use of digital selective... power; (B) For ship station transmitters installed before January 2, 1982, 16±2 dB below peak envelope power; and (C) For ship station transmitters installed after January 1, 1982, 18±2 dB below peak...

47 CFR 80.207 - Classes of emission.

Code of Federal Regulations, 2012 CFR

2012-10-01

... radiotelephone and radiotelegraph emissions by ship and coast stations includes the use of digital selective... power; (B) For ship station transmitters installed before January 2, 1982, 16±2 dB below peak envelope power; and (C) For ship station transmitters installed after January 1, 1982, 18±2 dB below peak...

View of the "handshake" of the SLP between the SSRMS and RMS during STS-100

NASA Image and Video Library

2001-04-28

S100-E-5898 (28 April 2001) --- A STS-100 crew member with a digital still camera recorded this image of an historical event through an overhead window on the aft flight deck of the Space Shuttle Endeavour. A Canadian “handshake in space” occurred at 4:02 p.m (CDT), April 28, 2001, as the Canadian-built space station robotic arm – operated by Expedition Two flight engineer Susan J. Helms –transferred its launch cradle over to Endeavour’s robotic arm, with Canadian Space Agency astronaut Chris A. Hadfield at the controls. The exchange of the pallet from station arm to shuttle arm marked the first ever robotic-to-robotic transfer in space.

Space station integrated wall design and penetration damage control. Task 4: Impact detection/location system

NASA Technical Reports Server (NTRS)

Nelson, J. M.; Lempriere, B. M.

1987-01-01

A program to develop a methodology is documented for detecting and locating meteoroid and debris impacts and penetrations of a wall configuration currently specified for use on space station. Testing consisted of penetrating and non-penetrating hypervelocity impacts on single and dual plate test configurations, including a prototype 1.22 m x 2.44 m x 3.56 mm (4 ft x 8 ft x 0.140 in) aluminum waffle grid backwall with multilayer insulation and a 0.063-in shield. Acoustic data were gathered with transducers and associated data acquisition systems and stored for later analysis with a multichannel digitizer. Preliminary analysis of test data included sensor evaluation, impact repeatability, first waveform arrival, and Fourier spectral analysis.

Convective rainfall estimation from digital GOES-1 infrared data

NASA Technical Reports Server (NTRS)

Sickler, G. L.; Thompson, A. H.

1979-01-01

An investigation was conducted to determine the feasibility of developing and objective technique for estimating convective rainfall from digital GOES-1 infrared data. The study area was a 240 km by 240 km box centered on College Station, Texas (Texas A and M University). The Scofield and Oliver (1977) rainfall estimation scheme was adapted and used with the digital geostationary satellite data. The concept of enhancement curves with respect to rainfall approximation is discussed. Raingage rainfall analyses and satellite-derived rainfall estimation analyses were compared. The correlation for the station data pairs (observed versus estimated rainfall amounts) for the convective portion of the storm was 0.92. It was demonstrated that a fairly accurate objective rainfall technique using digital geostationary infrared satellite data is feasible. The rawinsonde and some synoptic data that were used in this investigation came from NASA's Atmospheric Variability Experiment, AVE 7.

A Wireless Internet-Based Observatory: The Real-time Coastal Observation Network (ReCON)

DTIC Science & Technology

2007-09-01

48105 J. J. Gray National Oceanic and Atmospheric Administration Thunder Bay National Marine Sanctuary 500 W. Fletcher St. Alpena , MI 49707 S...underwater hubs with sensors. Shore Station Buoy or Permanent Station Alpena Muskegon Milwaukee Ann Arbor Chicago Cleveland Toledo...meteorological station located on TBI, and a shore station located at the Maritime Heritage Center in Alpena , MI. A digital video camera will be connected to

Interpretation of 2-probe turbulence measurements in an axisymmetric contraction

NASA Technical Reports Server (NTRS)

Marion-Moulin, C.; Tan-Atichat, J.; Nagib, H. M.

1983-01-01

Simultaneous measurements of the streamwise and radial velocity components at two points, one on and one off the centerline with variable radial separation, were digitally recorded and processed at several stations along a four to one contraction with controlled upstream turbulence conditions. Various statistical quantities are presented including spectra and coherence functions. The integral L sub ux, L sub um, L sub vx, L sub vm were also estimated and their variation along the contraction is examined.

75 FR 34787 - In the Matter of Luminant Generation Company LLC; Comanche Peak Steam Electric Station...

Federal Register 2010, 2011, 2012, 2013, 2014

2010-06-18

[email protected] , or by telephone at (301) 415-1677, to request (1) a digital ID certificate, which allows the... its counsel or representative, already holds an NRC- issued digital ID certificate). Based upon this... Secretary has not already established an electronic docket. Information about applying for a digital ID...

Dual keel Space Station payload pointing system design and analysis feasibility study

NASA Technical Reports Server (NTRS)

Smagala, Tom; Class, Brian F.; Bauer, Frank H.; Lebair, Deborah A.

1988-01-01

A Space Station attached Payload Pointing System (PPS) has been designed and analyzed. The PPS is responsible for maintaining fixed payload pointing in the presence of disturbance applied to the Space Station. The payload considered in this analysis is the Solar Optical Telescope. System performance is evaluated via digital time simulations by applying various disturbance forces to the Space Station. The PPS meets the Space Station articulated pointing requirement for all disturbances except Shuttle docking and some centrifuge cases.

75 FR 70260 - Notice of Public Information Collection(s) Being Reviewed by the Federal Communications...

Federal Register 2010, 2011, 2012, 2013, 2014

2010-11-17

... Construct or Make Changes in a Low Power TV, TV Translator, or TV Booster Station, FCC Form 346. Form Number... changes in a Low Power Television, TV Translator, or TV Booster broadcast station. On September 9, 2004..., Television Translator, and Television Booster Stations and to Amend Rules for Digital Class A Television...

Views of the ISS during Endeavour's final flyaround for STS-97

NASA Image and Video Library

2000-12-09

STS097-712-004 (9 December 2000) --- This picture of the distant International Space Station (ISS) blended against the darkness of space and the blue Earth at its horizon is one of a series of 70mm frames exposed of the station following undocking at 1:13 p.m. (CST), December 9, 2000. This series of images, as well as video and digital still imagery taken at the same time, represent the first imagery of the entire station with its new solar array panels deployed, though they are difficult to see in this angle. Before separation, the shuttle and space station had been docked to one another for 6 days, 23 hours and 13 minutes. Endeavour moved downward from the space station, then began a tail-first circle at a distance of about 500 feet. The maneuver, with pilot Michael J. Bloomfield at the controls, took about an hour. While Endeavour flew that circle, the two spacecraft, moving at five miles a second, navigated about two-thirds of the way around the Earth. Undocking took place 235 statute miles above the border of Kazakhstan and China. When Endeavour made its final separation burn, the orbiter and the space station were near the northeastern coast of South America.

36 CFR 1192.61 - Public information system.

Code of Federal Regulations, 2011 CFR

2011-07-01

... COMPLIANCE BOARD AMERICANS WITH DISABILITIES ACT (ADA) ACCESSIBILITY GUIDELINES FOR TRANSPORTATION VEHICLES... or digitized human speech messages, to announce stations and provide other passenger information... transportation system personnel, or recorded or digitized human speech messages, to announce train, route, or...

47 CFR 301.1 - Program purposes.

Code of Federal Regulations, 2010 CFR

2010-10-01

... Telecommunication NATIONAL TELECOMMUNICATIONS AND INFORMATION ADMINISTRATION, DEPARTMENT OF COMMERCE DIGITAL-TO... boxes. After February 17, 2009, the Federal Communications Commission will require that all full-power television stations in the United States broadcast using digital television technology. Consumers who wish to...

Station Crew Member Discusses Life in Space with Media

NASA Image and Video Library

2018-01-18

Aboard the International Space Station, Expedition 54 Flight Engineer Scott Tingle of NASA discussed life and research on the orbital complex during an in-flight interview session Jan. 18 with the ABC Digital Network and Space.com.

View of SSRMS during Expedition Six

NASA Image and Video Library

2003-03-19

ISS006-E-39746 (19 March 2003) --- Backdropped against the blackness of space, the Space Station Remote Manipulator System (SSRMS) or Canadarm2 is pictured in this digital still camera’s view taken from the International Space Station (ISS).

49 CFR 38.61 - Public information system.

Code of Federal Regulations, 2011 CFR

2011-10-01

... Transportation Office of the Secretary of Transportation AMERICANS WITH DISABILITIES ACT (ADA) ACCESSIBILITY... transportation system personnel, or recorded or digitized human speech messages, to announce stations and provide... public address system to permit transportation system personnel, or recorded or digitized human speech...

47 CFR 101.511 - Permissible services.

Code of Federal Regulations, 2010 CFR

2010-10-01

... authorization. (b) Stations may render any kind of digital communications service consistent with the Commission... Telecommunication FEDERAL COMMUNICATIONS COMMISSION (CONTINUED) SAFETY AND SPECIAL RADIO SERVICES FIXED MICROWAVE SERVICES 24 GHz Service and Digital Electronic Message Service § 101.511 Permissible services. (a...

78 FR 47795 - In the Matter of Entergy Nuclear Generation Company Pilgrim Power Station Independent Spent Fuel...

Federal Register 2010, 2011, 2012, 2013, 2014

2013-08-06

... by email at [email protected] , or by telephone at (301) 415-1677, to request (1) a digital ID... which the participant, or its counsel or representative, already holds an NRC-issued digital ID... about applying for a digital ID certificate is available on NRC's public Web site at http://www.nrc.gov...

76 FR 81542 - In the Matter of ZIONSOLUTIONS, LLC; Zion Nuclear Power Station; Independent Spent Fuel Storage...

Federal Register 2010, 2011, 2012, 2013, 2014

2011-12-28

... [email protected] , or by telephone at (301) 415-1677, to request (1) a digital ID certificate, which..., or its counsel or representative, already holds an NRC-issued digital ID certificate). Based upon... digital ID certificate is available on NRC's public Web site at http://www.nrc.gov/site-help/e-submittals...

75 FR 39986 - In the Matter of Entergy Operations, Inc., Waterford Steam Electric Station, Independent Spent...

Federal Register 2010, 2011, 2012, 2013, 2014

2010-07-13

... [email protected] , or by telephone at (301) 415-1677, to request (1) a digital ID certificate, which..., or its counsel or representative, already holds an NRC- issued digital ID certificate). Based upon... digital ID certificate is available on NRC's public Web site at http://www.nrc.gov/site-help/e-submittals...

PLT Polansky at commanders station on Atlantis

NASA Image and Video Library

2001-02-09

STS98-E-5024 (9 February 2001) --- Astronaut Mark L. Polansky, pilot, temporarily mans the commander's station on the flight deck of the Space Shuttle Atlantis during STS-98 Flight Day 2 maneuvers. The photograph was recorded with a digital still camera.

Horowitz checks flight notes at the commander's station

NASA Image and Video Library

2001-08-10

STS105-E-5002 (10 August 2001) --- Astronaut Scott J. Horowitz, STS-105 commander, checks flight notes at the commander's station on the flight deck of the Earth-orbiting Space Shuttle Discovery. The image was recorded with a digital still camera.

Horowitz checks flight notes at the commander's station

NASA Image and Video Library

2001-08-10

STS105-E-5001 (10 August 2001) --- Astronaut Scott J. Horowitz, STS-105 commander, checks flight notes at the commander's station on the flight deck of the Earth-orbiting Space Shuttle Discovery. The image was recorded with a digital still camera.

47 CFR 74.787 - Digital licensing.

Code of Federal Regulations, 2013 CFR

2013-10-01

... Telecommunication FEDERAL COMMUNICATIONS COMMISSION (CONTINUED) BROADCAST RADIO SERVICES EXPERIMENTAL RADIO... licensee that demonstrates in its application that a portion of the station's pre-transition analog service... demonstrated loss area within the full-service station's pre-transition analog service area. “Analog service...

47 CFR 74.787 - Digital licensing.

Code of Federal Regulations, 2012 CFR

2012-10-01

... Telecommunication FEDERAL COMMUNICATIONS COMMISSION (CONTINUED) BROADCAST RADIO SERVICES EXPERIMENTAL RADIO... licensee that demonstrates in its application that a portion of the station's pre-transition analog service... demonstrated loss area within the full-service station's pre-transition analog service area. “Analog service...

47 CFR 74.787 - Digital licensing.

Code of Federal Regulations, 2010 CFR

2010-10-01

... Telecommunication FEDERAL COMMUNICATIONS COMMISSION (CONTINUED) BROADCAST RADIO SERVICES EXPERIMENTAL RADIO... licensee that demonstrates in its application that a portion of the station's pre-transition analog service... demonstrated loss area within the full-service station's pre-transition analog service area. “Analog service...

47 CFR 74.787 - Digital licensing.

Code of Federal Regulations, 2011 CFR

2011-10-01

... Telecommunication FEDERAL COMMUNICATIONS COMMISSION (CONTINUED) BROADCAST RADIO SERVICES EXPERIMENTAL RADIO... licensee that demonstrates in its application that a portion of the station's pre-transition analog service... demonstrated loss area within the full-service station's pre-transition analog service area. “Analog service...

47 CFR 74.787 - Digital licensing.

Code of Federal Regulations, 2014 CFR

2014-10-01

... Telecommunication FEDERAL COMMUNICATIONS COMMISSION (CONTINUED) BROADCAST RADIO SERVICES EXPERIMENTAL RADIO... licensee that demonstrates in its application that a portion of the station's pre-transition analog service... demonstrated loss area within the full-service station's pre-transition analog service area. “Analog service...

Field Testing, Installation, and Calibration of a new Data Acquisition System for the USGS-Stanford-Berkley Ultra-Low Frequency Electromagnetic (ULFEM) Array

NASA Astrophysics Data System (ADS)

Creasy, N.; Gardner, J.; Spritzer, J. M.; Keneally, I.; Glen, J. M.; McPhee, D.; Klemperer, S. L.

2013-12-01

Since 2006, Stanford University, USGS, and UC Berkeley collaboratively maintain five permanent stations, to measure electric and magnetic data from 0.01 to 40Hz. Each station consists of three orthogonal coil magnetometers and two orthogonal 100m electrodes. The acquisition of ULFEM data helps study possible correlations between electromagnetic fields and seismic events related to the San Andreas Fault system. The current data acquisition system uses a Quanterra Q330 analog-to-digital converter. In 2010, we began development of a new 24-bit digitizing system known as the ULFEM 2010 digitizer in order to replace the Q330. The design of the new recorder was to be more economical and better tailored to the ULFEM network by providing power, calibration, and improved protection from lightning. However, the prototype had many problems, including a daily phase shift, amplifying error, and a time delay of 15 seconds (Bowden, et al., AGU, 2010). Currently, comparative testing of an improved prototype, ULFEM 2013, and the Q330 is taking place at the Jasper Ridge ULFEM station. The ULFEM 2013 contains eight channels that record input from three coil magnetometers, four electrodes, and temperature. Testing is ongoing and involves comparing the coil magnetometer and electrode signals processed by the Q330 and ULFEM 2013 digitizer. Data from the two systems will be compared in the time and frequency domains, and analyses will include calculating error and cross correlations. The ULFEM 2013 digitizer provides power to the magnetometer sensors as well as a calibration coil system (CCS). Every 24 hours, the CCS sends a calibration signal to calibration induction coils fitted to each of the three orthogonal magnetometers with the aim of testing the sensors' sensitivity and accuracy. The CCS produces a frequency sweep of 0.08, 0.51, 5, and 10Hz, creating a field nearly ten times greater than the Earth's field. The CCS consists of open source hardware and an amplifying frequency generator. Another ongoing effort to calibrate the ULFEM stations uses ground motion produced by distant earthquakes. Because of our stations' relatively close proximity (approximately 70km apart), teleseismic earthquakes at epicentral distances produce near-identical long-period seismic arrivals at each ULFEM station. The ground motion generated by the surface waves of distant earthquakes causes displacement of the induction coils, inducing magnetic anomalies in the recorded data. Because the ground motion has nearly the same characteristics at each station, the magnetic anomalies observed should have similar amplitudes regardless of the station (though modulated by the local conductivity structure at each site). To identify these coseismic signals, magnetic data were compared against seismic data from each station. Magnetic signals are clearly visible due to passage of Love and Rayleigh waves from teleseismic earthquakes of magnitude >7.4 and their relative amplitudes provide additional confirmation of the stability of our coils and recording system prior to the installation of the CCS.

PG&E's Seismic Network Goes Digital With Strong Motion: Successes and Challenges

NASA Astrophysics Data System (ADS)

Stanton, M. A.; Cullen, J.; McLaren, M. K.

2008-12-01

Pacific Gas and Electric Company (PG&E) is in year 3 of a 5-year project to upgrade the Central Coast Seismic Network (CCSN) from analog to digital. Located along the south-central California coast, the CCSN began operation in 1987, with 20 analog stations; 15 vertical component and 5 dual gain 3-component S-13 sensors. The analog signals travel over FM radio telemetry links and voice channels via PG&E's microwave network to our facility in San Francisco (SF), where the A/D conversion is performed on a computer running Earthworm v7.1, which also transmits the data to the USGS in Menlo Park. At the conversion point the dynamic ranges of the vertical and dual-gain sensors are 40-50dB and 60-70dB, respectively. Dynamic range exceedance (data clipping) generally occurs for a M2.5 or greater event within about 40 km of a station. The motivations to upgrade the seismic network were the need for higher dynamic range and to retire obsolete analog transmission equipment. The upgraded digital stations consist of the existing velocity sensors, a 131A-02/3 accelerometer and a Reftek 130-01 Broadband Seismic Recorder for digital data recording and transmission to SF. Vertical only stations have one component of velocity and 3 components of acceleration. Dual gain sites have 3 components of velocity and 3 of acceleration. To date we have successfully upgraded 6 sites; 3 more will be installed by the end of 2008. Some of the advantages of going digital are 1) data is recorded at each site and in SF, 2) substantially increased dynamic range of the velocity sensors to 120dB, as observed by on scale, close-by recordings from a M3.9 San Simeon aftershock on 04/29/2008, 3) accelerometers for on scale recording of large earthquakes, and 4) ability to contribute our strong motion data to USGS ShakeMaps. A significant challenge has been consistent radio communications. To resolve this issue we are installing point-to-multipoint Motorola Canopy spread spectrum radios at the stations and communication towers.

76 FR 5158 - Notice of Public Information Collection(s) Being Submitted for Review and Approval to the Office...

Federal Register 2010, 2011, 2012, 2013, 2014

2011-01-28

... Authority to Construct or Make Changes in a Low Power TV, TV Translator, or TV Booster Station, FCC Form 346... construct or make changes in a Low Power Television, TV Translator, or TV Booster broadcast station. On..., Television Translator, and Television Booster Stations and to Amend Rules for Digital Class A Television...

Radiofrequency electromagnetic fields emitted from base stations of DECT cordless phones and the risk of glioma and meningioma (Interphone Study Group, Germany).

PubMed

Schüz, Joachim; Böhler, Eva; Schlehofer, Brigitte; Berg, Gabriele; Schlaefer, Klaus; Hettinger, Iris; Kunna-Grass, Katharina; Wahrendorf, Jürgen; Blettner, Maria

2006-07-01

The objective of this study was to test the hypothesis that exposure to continuous low-level radiofrequency electromagnetic fields (RF EMFs) increases the risk of glioma and meningioma. Participants in a population-based case-control study in Germany on the risk of brain tumors in relation to cellular phone use were 747 incident brain tumor cases between the ages of 30 and 69 years and 1494 matched controls. The exposure measure of this analysis was the location of a base station of a DECT (Digital Enhanced Cordless Telecommunications) cordless phone close to the bed, which was used as a proxy for continuous low-level exposure to RF EMFs during the night. Estimated odds ratios were 0.82 (95% confidence interval: 0.29-2.33) for glioma and 0.83 (0.29-2.36) for meningioma. There was also no increasing risk observed with duration of exposure to DECT cordless phone base stations. Although the study was limited due to the small number of exposed subjects, it is still a first indication that residential low-level exposure to RF EMFs may not pose a higher risk of brain tumors.

The two-way time synchronization system via a satellite voice channel

NASA Technical Reports Server (NTRS)

Heng-Qiu, Zheng; Ren-Huan, Zhang; Yong-Hui, HU

1994-01-01

A newly developed two-way time synchronization system is described in this paper. The system uses one voice channel at a SCPC satellite digital communication earth station, whose bandwidth is only 45 kHz, thus saving satellite resources greatly. The system is composed of one master station and one or several, up to sixty-two, secondary stations. The master and secondary stations are equipped with the same equipment, including a set of timing equipment, a synthetic data terminal for time synchronizing, and a interface unit between the data terminal and the satellite earth station. The synthetic data terminal for time synchronization also has an IRIG-B code generator and a translator. The data terminal of master station is the key part of whole system. The system synchronization process is full automatic, which is controlled by the master station. Employing an autoscanning technique and conversational mode, the system accomplishes the following tasks: linking up liaison with each secondary station in turn, establishing a coarse time synchronization, calibrating date (years, months, days) and time of day (hours, minutes, seconds), precisely measuring the time difference between local station and the opposite station, exchanging measurement data, statistically processing the data, rejecting error terms, printing the data, calculating the clock difference and correcting the phase, thus realizing real-time synchronization from one point to multiple points. We also designed an adaptive phase circuit to eliminate the phase ambiguity of the PSK demodulator. The experiments have shown that the time synchronization accuracy is better than 2 mu S. The system has been put into regular operation.

A rotor-mounted digital instrumentation system for helicopter blade flight research measurements

NASA Technical Reports Server (NTRS)

Knight, V. H., Jr.; Haywood, W. S., Jr.; Williams, M. L.

1978-01-01

A rotor mounted flight instrumentation system developed for helicopter rotor blade research is described. The system utilizes high speed digital techniques to acquire research data from miniature pressure transducers on advanced rotor airfoils which are flight tested on an AH-1G helicopter. The system employs microelectronic pulse code modulation (PCM) multiplexer digitizer stations located remotely on the blade and in a hub mounted metal canister. As many as 25 sensors can be remotely digitized by a 2.5 mm thick electronics package mounted on the blade near the tip to reduce blade wiring. The electronics contained in the canister digitizes up to 16 sensors, formats these data with serial PCM data from the remote stations, and transmits the data from the canister which is above the plane of the rotor. Data are transmitted over an RF link to the ground for real time monitoring and to the helicopter fuselage for tape recording. The complete system is powered by batteries located in the canister and requires no slip rings on the rotor shaft.

Interior of the U.S. Laboratory / Destiny module

NASA Image and Video Library

2001-02-11

STS98-E-5113 (11 February 2001) --- This wide shot, photographed with a digital still camera, shows the interior of the newly attached Destiny laboratory. The crews of Atlantis and the International Space Station opened the laboratory on Feb. 11 and spent the first full day of what are planned to be years of work ahead inside the orbiting science and command center. Station commander William M. (Bill) Shepherd opened the Destiny hatch, and he and shuttle commander Kenneth D. Cockrell ventured inside at 8:38 a.m. (CST), Feb. 11. As depicted in subsequent digital images in this series, members of both crews went to work quickly inside the new module, activating air systems, fire extinguishers, alarm systems, computers and internal communications. The crew also continued equipment transfers from the shuttle to the station.

Evaluation of Preproduction Hardware Components for IMS Station Upgrades to Reduce Manufacturers Development Time

NASA Astrophysics Data System (ADS)

Hart, Darren; Pearce, Nathan; Starovoit, Yuri; Guralp, Cansun

2014-05-01

Since the Comprehensive Nuclear-Test-Ban Treaty was opened for signature in 1996, nearly 80% of the network has been certified as operational, and those stations are sending data to the International Data Centre (IDC) in Vienna. Several International Monitoring System (IMS) monitoring facilities have been in operation for close to 15 years, and several certified stations are facing equipment obsolescence issues. The search for engineering solutions to replace obsolete hardware components is guided by two primary goals: 1) be compliant with IMS minimum technical requirements and 2) be able to be integrated with the existing system. To reduce the development and verification time necessary to address obsolescence in equipment, the PTS has requested the preproduction testing of the recently revised Guralp CMG-DM24AM digitizer. Performing preproduction testing has helped in identifying issues, which Guralp Systems has resolved. In our poster, we will review the reasons for the digitizer updates, present results of the preproduction testing of the Guralp digitizer, and comment on the value this process has provided to the IMS operation.

View of the extended SSRMS or Canadarm2 with cloudy view in the background

NASA Image and Video Library

2003-01-09

ISS006-E-16947 (9 January 2003) --- The Space Station Remote Manipulator System (SSRMS) or Canadarm2 is pictured over the Bahama Islands in this digital still camera's view taken from the International Space Station (ISS).

Usachev in sleep station in Service Module

NASA Image and Video Library

2001-04-22

ISS002-E-5360 (22 April 2001) --- Cosmonaut Yury V. Usachev, Expedition Two mission commander, writes down some notes in his sleeping compartment in the Zvezda / Service Module of the International Space Station (ISS). This image was recorded with a digital still camera.

Usachev at sleep station in Service Module

NASA Image and Video Library

2001-04-28

ISS002-E-6337 (28 April 2001) --- Cosmonaut Yury V. Usachev, Expedition Two mission commander, writes down some notes in his sleeping compartment in the Zvezda / Service Module of the International Space Station (ISS). The image was taken with a digital still camera.

Advanced ground station architecture

NASA Technical Reports Server (NTRS)

Zillig, David; Benjamin, Ted

1994-01-01

This paper describes a new station architecture for NASA's Ground Network (GN). The architecture makes efficient use of emerging technologies to provide dramatic reductions in size, operational complexity, and operational and maintenance costs. The architecture, which is based on recent receiver work sponsored by the Office of Space Communications Advanced Systems Program, allows integration of both GN and Space Network (SN) modes of operation in the same electronics system. It is highly configurable through software and the use of charged coupled device (CCD) technology to provide a wide range of operating modes. Moreover, it affords modularity of features which are optional depending on the application. The resulting system incorporates advanced RF, digital, and remote control technology capable of introducing significant operational, performance, and cost benefits to a variety of NASA communications and tracking applications.

Space Station Freedom power supply commonality via modular design

NASA Technical Reports Server (NTRS)

Krauthamer, S.; Gangal, M. D.; Das, R.

1990-01-01

At mature operations, Space Station Freedom will need more than 2000 power supplies to feed housekeeping and user loads. Advanced technology power supplies from 20 to 250 W have been hybridized for terrestrial, aerospace, and industry applications in compact, efficient, reliable, lightweight packages compatible with electromagnetic interference requirements. The use of these hybridized packages as modules, either singly or in parallel, to satisfy the wide range of user power supply needs for all elements of the station is proposed. Proposed characteristics for the power supplies include common mechanical packaging, digital control, self-protection, high efficiency at full and partial loads, synchronization capability to reduce electromagnetic interference, redundancy, and soft-start capability. The inherent reliability is improved compared with conventional discrete component power supplies because the hybrid circuits use high-reliability components such as ceramic capacitors. Reliability is further improved over conventional supplies because the hybrid packages, which may be treated as a single part, reduce the parts count in the power supply.

Communications and control for electric power systems

NASA Technical Reports Server (NTRS)

Kirkham, H.

1992-01-01

A long-term strategy for the integration of new control technologies for power generation and delivery is proposed: the industry would benefit from an evolutionary approach that would adapt to its needs future technologies as well as those that it has so far not heeded. The integrated operation of the entire system, including the distribution system, was proposed as a future goal. The AbNET communication protocols are reviewed, and additions that were made in 1991 are described. In the original network, traffic was controlled by polling at the master station, located at the substation, and routed by a flooding algorithm. In a revised version, the polling and flooding are modified. The question of interfacing low-energy measurement transducers or instrument transformers is considered. There is presently little or no agreement on what the output of optical current transducers (CT's) should be. Appendices deal with the calibration of current transducers; with Delta modulation, a simple means of serially encoding the output of an OCT; and with noise shaping, a method of digital signal processing that trades off the number of bits in a digital sample for a higher number of samples.

Information management advanced development. Volume 3: Digital data bus breadboard

NASA Technical Reports Server (NTRS)

Gerber, C. R.

1972-01-01

The design, development, and evaluation of the digital data bus breadboard for the modular space station are discussed. Subjects presented are: (1) requirements summary, (2) parametric data for bus design, (3) redundancy concepts, and (4) data bus breadboard performance and interface requirements.

47 CFR 73.403 - Digital audio broadcasting service requirements.

Code of Federal Regulations, 2010 CFR

2010-10-01

... programming stream at no direct charge to listeners. In addition, a broadcast radio station must simulcast its analog audio programming on one of its digital audio programming streams. The DAB audio programming... analog programming service currently provided to listeners. (b) Emergency information. The emergency...

Usachev typing while in sleep station in the Service Module

NASA Image and Video Library

2001-03-23

ISS002-E-5730 (23 March 2001) --- Cosmonaut Yury V. Usachev, Expedition Two commander, works at a laptop computer in his crew compartment in the Zvezda Service Module aboard the International Space Station (ISS). The image was recorded with a digital still camera.

Characterization and Design of Digital Pointing Subsystem for Optical Communication Demonstrator

NASA Technical Reports Server (NTRS)

Racho, C.; Portillo, A.

1998-01-01

The Optical Communications Demonstrator (OCD) is a laboratory-based lasercom demonstration terminal designed to validate several key technologies, including beacon acquisition, high bandwidth tracking, precision bearn pointing, and point-ahead compensation functions. It has been under active development over the past few years. The instrument uses a CCD array detector for both spatial acquisition and high-bandwidth tracking, and a fiber coupled laser transmitter. The array detector tracking concept provides wide field-of-view acquisition and permits effective platform jitter compensation and point-ahead control using only one steering mirror. This paper describes the detailed design and characterization of the digital control loop system which includes the Fast Steering Mirror (FSM), the CCD image tracker, and the associated electronics. The objective is to improve the overall system performance using laboratory measured data. The. design of the digital control loop is based on a linear time invariant open loop model. The closed loop performance is predicted using the theoretical model. With the digital filter programmed into the OCD control software, data is collected to verify the predictions. This paper presents the results of the, system modeling and performance analysis. It has been shown that measurement data closely matches theoretical predictions. An important part of the laser communication experiment is the ability of FSM to track the laser beacon within the. required tolerances. The pointing must be maintained to an accuracy that is much smaller than the transmit signal beamwidth. For an earth orbit distance, the system must be able to track the receiving station to within a few microradians. The failure. to do so will result in a severely degraded system performance.

Ground terminal expert (GTEX). Part 2: Expert system diagnostics for a 30/20 Gigahertz satellite transponder

NASA Technical Reports Server (NTRS)

Durkin, John; Schlegelmilch, Richard; Tallo, Donald

1992-01-01

A research effort was undertaken to investigate how expert system technology could be applied to a satellite communications system. The focus of the expert system is the satellite earth station. A proof of concept expert system called the Ground Terminal Expert (GTEX) was developed at the University of Akron in collaboration with the NASA Lewis Research Center. With the increasing demand for satellite earth stations, maintenance is becoming a vital issue. Vendors of such systems will be looking for cost effective means of maintaining such systems. The objective of GTEX is to aid in diagnosis of faults occurring with the digital earth station. GTEX was developed on a personal computer using the Automated Reasoning Tool for Information Management (ART-IM) developed by the Inference Corporation. Developed for the Phase 2 digital earth station, GTEX is a part of the Systems Integration Test and Evaluation (SITE) facility located at the NASA Lewis Research Center.

PV-Diesel Hybrid SCADA Experiment Network Design

NASA Technical Reports Server (NTRS)

Kalu, Alex; Durand, S.; Emrich, Carol; Ventre, G.; Wilson, W.; Acosta, R.

1999-01-01

The essential features of an experimental network for renewable power system satellite based supervisory, control and data acquisition (SCADA) are communication links, controllers, diagnostic equipment and a hybrid power system. Required components for implementing the network consist of two satellite ground stations, to satellite modems, two 486 PCs, two telephone receivers, two telephone modems, two analog telephone lines, one digital telephone line, a hybrid-power system equipped with controller and a satellite spacecraft. In the technology verification experiment (TVE) conducted by Savannah State University and Florida Solar Energy Center, the renewable energy hybrid system is the Apex-1000 Mini-Hybrid which is equipped with NGC3188 for user interface and remote control and the NGC2010 for monitoring and basic control tasks. This power system is connected to a satellite modem via a smart interface, RS232. Commands are sent to the power system control unit through a control PC designed as PC1. PC1 is thus connected to a satellite model through RS232. A second PC, designated PC2, the diagnostic PC is connected to both satellite modems via separate analog telephone lines for checking modems'health. PC2 is also connected to PC1 via a telephone line. Due to the unavailability of a second ground station for the ACTS, one ground station is used to serve both the sending and receiving functions in this experiment. Signal is sent from the control PC to the Hybrid system at a frequency f(sub 1), different from f(sub 2), the signal from the hybrid system to the control PC. f(sub l) and f(sub 2) are sufficiently separated to avoid interference.

Payload specialist station study: Volume 2, part 3: Program analysis and planning for phase C/D

NASA Technical Reports Server (NTRS)

1976-01-01

The controls and displays (C&D) required at the Orbiter aft-flight deck (AFD) and the core C&D required at the Payload Specialist Station (PSS) are identified in this document. The AFD C&D Concept consists of a multifunction display system (MFDS) and elements of multiuse mission support equipment (MMSE). The MFDS consists of two CRTs, a display electronics unit (DEU), and a keyboard. The MMSE consists of a manual pointing controller (MPC), five digit numeric displays, 10 character alphanumeric legends, event timers, analog meters, rotary and toggle switches. The MMSE may be hardwired to the experiment, or interface with a data bus at the PSS for signal processing. The MFDS has video capability, with alphanumeric and graphic overlay features, on one CRT and alphanumeric and graphic (tricolor) capability on a second CRT. The DEU will have the capability to communicate, via redundant data buses, with both the spacelab experiment and subsystem computers.

Kotov during Albedo Experiment in the SM

NASA Image and Video Library

2013-11-18

ISS038-E-005022 (20 Nov. 2013) --- At a window in the International Space Station?s Zvezda Service Module, Russian cosmonaut Oleg Kotov, Expedition 38 commander, uses a digital camera photospectral system to perform a session for the Albedo Experiment. The experiment measures Earth?s albedo, or the amount of solar radiation reflected from the surface, in the hopes to develop methods to harness the reflected radiation to supplement the station?s power supply. The light reflection phenomenon is measured in units called albedo.

Kotov during Albedo Experiment in the SM

NASA Image and Video Library

2013-11-18

ISS038-E-005023 (20 Nov. 2013) --- At a window in the International Space Station?s Zvezda Service Module, Russian cosmonaut Oleg Kotov, Expedition 38 commander, uses a digital camera photospectral system to perform a session for the Albedo Experiment. The experiment measures Earth?s albedo, or the amount of solar radiation reflected from the surface, in the hopes to develop methods to harness the reflected radiation to supplement the station?s power supply. The light reflection phenomenon is measured in units called albedo.

Kotov during Albedo Experiment in the SM

NASA Image and Video Library

2013-11-18

ISS038-E-005031 (20 Nov. 2013) --- At a window in the International Space Station?s Zvezda Service Module, Russian cosmonaut Oleg Kotov, Expedition 38 commander, uses a digital camera photospectral system to perform a session for the Albedo Experiment. The experiment measures Earth?s albedo, or the amount of solar radiation reflected from the surface, in the hopes to develop methods to harness the reflected radiation to supplement the station?s power supply. The light reflection phenomenon is measured in units called albedo.

Kotov during Albedo Experiment in the SM

NASA Image and Video Library

2013-11-18

ISS038-E-005016 (20 Nov. 2013) --- At a window in the International Space Station?s Zvezda Service Module, Russian cosmonaut Oleg Kotov, Expedition 38 commander, uses a digital camera photospectral system to perform a session for the Albedo Experiment. The experiment measures Earth?s albedo, or the amount of solar radiation reflected from the surface, in the hopes to develop methods to harness the reflected radiation to supplement the station?s power supply. The light reflection phenomenon is measured in units called albedo.

Kotov during Albedo Experiment in the SM

NASA Image and Video Library

2013-11-18

ISS038-E-005019 (20 Nov. 2013) --- At a window in the International Space Station?s Zvezda Service Module, Russian cosmonaut Oleg Kotov, Expedition 38 commander, uses a digital camera photospectral system to perform a session for the Albedo Experiment. The experiment measures Earth?s albedo, or the amount of solar radiation reflected from the surface, in the hopes to develop methods to harness the reflected radiation to supplement the station?s power supply. The light reflection phenomenon is measured in units called albedo.

MS Currie on aft flight deck with checklist

NASA Image and Video Library

2002-03-07

STS109-E-5681 (7 March 2002) --- Astronaut Nancy J. Currie, mission specialist, remains very near the controls (upper left) for Columbia's Remote Manipulator System (RMS). On a week with one lengthy space walk per day, Currie has had her hands full with RMS duties to support the space walks of four crewmates. A short time later on this day, astronauts James H. Newman and Michael J. Massimino began EVA-4 and the duo required the services of Currie to control the robotic arm to maneuver them around the various work stations on the Hubble Space Telescope (HST). The image was recorded with a digital still camera.

Near-station terrain corrections for gravity data by a surface-integral technique

USGS Publications Warehouse

Gettings, M.E.

1982-01-01

A new method of computing gravity terrain corrections by use of a digitizer and digital computer can result in substantial savings in the time and manual labor required to perform such corrections by conventional manual ring-chart techniques. The method is typically applied to estimate terrain effects for topography near the station, for example within 3 km of the station, although it has been used successfully to a radius of 15 km to estimate corrections in areas where topographic mapping is poor. Points (about 20) that define topographic maxima, minima, and changes in the slope gradient are picked on the topographic map, within the desired radius of correction about the station. Particular attention must be paid to the area immediately surrounding the station to ensure a good topographic representation. The horizontal and vertical coordinates of these points are entered into the computer, usually by means of a digitizer. The computer then fits a multiquadric surface to the input points to form an analytic representation of the surface. By means of the divergence theorem, the gravity effect of an interior closed solid can be expressed as a surface integral, and the terrain correction is calculated by numerical evaluation of the integral over the surfaces of a cylinder, The vertical sides of which are at the correction radius about the station, the flat bottom surface at the topographic minimum, and the upper surface given by the multiquadric equation. The method has been tested with favorable results against models for which an exact result is available and against manually computed field-station locations in areas of rugged topography. By increasing the number of points defining the topographic surface, any desired degree of accuracy can be obtained. The method is more objective than manual ring-chart techniques because no average compartment elevations need be estimated ?

Imaging_Earth_With_MUSES

NASA Image and Video Library

2017-07-11

Commercial businesses and scientific researchers have a new capability to capture digital imagery of Earth, thanks to MUSES: the Multiple User System for Earth Sensing facility. This platform on the outside of the International Space Station is capable of holding four different payloads, ranging from high-resolution digital cameras to hyperspectral imagers, which will support Earth science observations in agricultural awareness, air quality, disaster response, fire detection, and many other research topics. MUSES program manager Mike Soutullo explains the system and its unique features including the ability to change and upgrade payloads using the space station’s Canadarm2 and Special Purpose Dexterous Manipulator. For more information about MUSES, please visit: https://www.nasa.gov/mission_pages/station/research/news/MUSES For more on ISS science, https://www.nasa.gov/mission_pages/station/research/index.html or follow us on Twitter @ISS_research

The compilation of the instrumental seismic catalogue of Italy: 1975-1984

NASA Astrophysics Data System (ADS)

Giardini, D.; Velonà, M. A.; Boschi, E.

1992-12-01

We compile a homogeneous and complete catalogue of the seismicity of the Italian region for 1975-1984, the period marking the transition from standard analogue seismometry to the new digital era. The work is developed in three phases: (1) the creation of a uniform digital databank of all seismic station readings, unifying the database available at the Istituto Nazionale di Geofisica with the catalogue of the International Seismological Centre; (2) the preparation of numerical procedures for automatic association of arrival data and for hypocentre location, using arrivals from local, regional and teleseismic stations in a spherical geometry; (3) the introduction of lateral heterogeneity by calibrating regional travel-time curves and station corrections. The first two phases have been completed, providing a new instrumental catalogue obtained using a spherical Earth model; the third phase is presented here in a preliminary stage.

Description of real-time Ada software implementation of a power system monitor for the Space Station Freedom PMAD DC testbed

NASA Technical Reports Server (NTRS)

Ludwig, Kimberly; Mackin, Michael; Wright, Theodore

1991-01-01

The authors describe the Ada language software developed to perform the electrical power system monitoring functions for the NASA Lewis Research Center's Power Management and Distribution (PMAD) DC testbed. The results of the effort to implement this monitor are presented. The PMAD DC testbed is a reduced-scale prototype of the electric power system to be used in Space Station Freedom. The power is controlled by smart switches known as power control components (or switchgear). The power control components are currently coordinated by five Compaq 386/20e computers connected through an 802.4 local area network. The power system monitor algorithm comprises several functions, including periodic data acquisition, data smoothing, system performance analysis, and status reporting. Data are collected from the switchgear sensors every 100 ms, then passed through a 2-Hz digital filter. System performance analysis includes power interruption and overcurrent detection. The system monitor required a hardware timer interrupt to activate the data acquisition function. The execution time of the code was optimized by using an assembly language routine. The routine allows direct vectoring of the processor to Ada language procedures that perform periodic control activities.

47 CFR 80.225 - Requirements for selective calling equipment.

Code of Federal Regulations, 2011 CFR

2011-10-01

... selective calling (DSC) equipment and selective calling equipment installed in ship and coast stations, and...-STD, “RTCM Recommended Minimum Standards for Digital Selective Calling (DSC) Equipment Providing... Class ‘D’ Digital Selective Calling (DSC)—Methods of testing and required test results,” March 2003. ITU...

GEONETCast Americas - Architecture

Science.gov Websites

service uses the commercial Intelsat-9 (IS-9) satellite to broadcast environmental and other observation found here. Users throughout the region can pick up the broadcast using inexpensive satellite receiver stations based on Digital Video Broadcast (DVB) standards (Digital Video Broadcast – Satellite or DVB-S

76 FR 49697 - Television Broadcasting Services; Eau Claire, WI

Federal Register 2010, 2011, 2012, 2013, 2014

2011-08-11

..., viewers have reported difficulties receiving the station's digital signal on channel 13 since the end of the digital transition. Substituting channel 38 for channel 13 will allow Gray to leverage the... Report and Order in a report to be sent to Congress and the Government Accountability Office pursuant to...

View of the SSRMS/Canadarm2 with blue and white Earth in the background during Expedition Six

NASA Image and Video Library

2003-04-06

ISS006-E-43973 (6 April 2003) --- Backdropped against a blue and white Earth, the Space Station Remote Manipulator System (SSRMS) or Canadarm2 is pictured in this digital still camera’s view taken from the International Space Station (ISS).

ISS, Soyuz, and Endeavour undocking seen from the SM during Expedition Four

NASA Image and Video Library

2001-12-15

ISS004-E-5024 (15 December 2001) --- A Soyuz vehicle, docked to the International Space Station (ISS), is photographed by a crewmember on the station. A portion of the Space Shuttle Endeavour is visible in the background. The image was taken with a digital still camera.

Data Rescue for precipitation station network in Slovak Republic

NASA Astrophysics Data System (ADS)

Fasko, Pavel; Bochníček, Oliver; Švec, Marek; Paľušová, Zuzana; Markovič, Ladislav

2016-04-01

Transparency of archive catalogues presents very important task for the data saving. It helps to the further activities e.g. digitalization and homogenization. For the time being visualization of time series continuation in precipitation stations (approximately 1250 stations) is under way in Slovak Republic since the beginning of observation (meteorological stations gradually began to operate during the second half of the 19th century in Slovakia). Visualization is joined with the activities like verification and accessibility of the data mentioned in the archive catalogue, station localization according to the historical annual books, conversion of coordinates into x-JTSK, y-JTSK and hydrological catchment assignment. Clustering of precipitation stations at the specific hydrological catchment in the map and visualization of the data duration (line graph) will lead to the effective assignment of corresponding precipitation stations for the prolongation of time series. This process should be followed by the process of turn or trend detection and homogenization. The risks and problems at verification of records from archive catalogues, their digitalization, repairs and the way of visualization will be seen in poster. During the searching process of the historical and often short time series, we realized the importance of mainly those stations, located in the middle and higher altitudes. They might be used as replacement for up to now quoted fictive points used at the construction of precipitation maps. Supplementing and enhancing the time series of individual stations will enable to follow changes in precipitation totals during the certain period as well as area totals for individual catchments in various time periods appreciated mainly by hydrologists and agro-climatologists.

A Precision, Low-Cost GPS-Based Transmitter Synchronization Scheme for Improved AM Reception

DOE Office of Scientific and Technical Information (OSTI.GOV)

Smith, Stephen Fulton; Moore, Anthony

2009-01-01

This paper describes a highly accurate carrier-frequency synchronization scheme for actively, automatically locking multiple, remotely located AM broadcast transmitters to a common frequency/timing reference source such as GPS. The extremely tight frequency lock (to {approx}1 part in 10{sup 9} or better) permits the effective elimination of audible and even sub-audible beats between the local (desired) station's carrier signal and the distant stations carriers, usually received via skywave propagation during the evening and nighttime hours. These carrier-beat components cause annoying modulations of the desired station's audio at the receiver and concurrent distortion of the audio modulation from the distant station(s) andmore » often cause listeners to ldquotune outrdquo due to the low reception quality. Significant reduction or elimination of the beats and related effects will greatly enlarge the effective (interference-limited) listening area of the desired station (from 4 to 10 times as indicated in our tests) and simultaneously reduce the corresponding interference of the local transmitter to the distant stations as well. In addition, AM stereo (CQUAM) reception will be particularly improved by minimizing the phase shifts induced by co-channel interfering signals; hybrid digital (HD) signals will also benefit via reduction in beats from analog signals. The automatic frequency-control hardware described is inexpensive ($1000-$2000), requires no periodic recalibration, has essentially zero long-term drift, and could employ alternate wide-area frequency references of suitable accuracy, including broadcasts from WWVB, LORAN-C, and equivalent sources. The basic configuration of the GPS-disciplined oscillator which solves this problem is extremely simple. The main oscillator is a conventional high-stability quartz-crystal type. To counter long- term drifts, the oscillator is slightly adjusted to track a high-precision source of standard frequency obtained from a specialized GPS receiver (or other source), usually at 10.000 MHz. This very stable local reference frequency is then used as a clock for a standard digitally implemented frequency synthesizer, which is programmed to generate the specific carrier frequency desired. The stability of the disciplining source, typically {approx}1 part in 10{sup 9} to 10{sup 11}, is thus transferred to the final AM transmitter carrier output frequency.« less

AIROscope: Ames infrared balloon-borne telescope

NASA Technical Reports Server (NTRS)

Koontz, O. L.; Scott, S. G.

1974-01-01

A balloon-borne telescope system designed for astronomical observations at infrared wavelengths is discussed. The telescope is gyro-stabilized with updated pointing information derived from television, star tracker, or ground commands. The television system furnishes both course and fine acquisition after initial orientation using a pair of fluxgate servo compasses. Command and control is by a UHF link with 256 commands available. Scientific and engineering data are telemetered to the ground station via narrow band F.M. in the L band. The ground station displays all scientific, engineering and status information during the flights and records the command and telemetry digital bit stream for detailed analysis. The AIROscope telescope has a 28-inch diameter primary mirror and Dall-Kirkham optics. The beam is modulated by oscillating a secondary mirror at 11 or 25 Hz with provision for left or right beam fixed positions by command.

Performance improvement of a measurement station for superconducting cable test

NASA Astrophysics Data System (ADS)

Arpaia, Pasquale; Bottura, Luca; Montenero, Giuseppe; Naour, Sandrine Le

2012-09-01

A fully digital system, improving measurements flexibility, integrator drift, and current control of superconducting transformers for cable test, is proposed. The system is based on a high-performance integration of Rogowski coil signal and a flexible direct control of the current into the secondary windings. This allows state-of-the-art performance to be overcome by means of out-of-the-shelf components: on a full-scale of 32 kA, current measurement resolution of 1 A, stability below 0.25 A min-1, and controller ripple less than ±50 ppm. The system effectiveness has been demonstrated experimentally on the superconducting transformer of the Facility for the Research of Superconducting Cables at the European Organization for Nuclear Research (CERN).

Use of digital photography for power plant retrofits

DOE Office of Scientific and Technical Information (OSTI.GOV)

Kamba, J.J.

1995-09-01

One of the latest advancements in electronic tools for reducing engineering and drafting effort is the use of digital photography (DP) for retrofit and betterment projects at fossil and nuclear power plants. Sargent and Lundy (S and L) has effectively used digital photography for condition assessments, minor backfit repairs, thermo-lag fire wrap assessments and repairs, and other applications. Digital photography offers several benefits on these types of projects including eliminating the need for official repair drawings and providing station maintenance with a true 3-D visualization of the repair.

NASA Spinoff Article: Automated Procedures To Improve Safety on Oil Rigs

NASA Technical Reports Server (NTRS)

Garud, Sumedha

2013-01-01

On May 11th, 2013, two astronauts emerged from the interior of the International Space Station (ISS) and worked their way toward the far end of spacecraft. Over the next 51/2 hours, the two replaced an ammonia pump that had developed a significant leak a few days before. On the ISS, ammonia serves the vital role of cooling components-in this case, one of the station's eight solar arrays. Throughout the extravehicular activity (EVA), the astronauts stayed in constant contact with mission control: every movement, every action strictly followed a carefully planned set of procedures to maximize crew safety and the chances of success. Though the leak had come as a surprise, NASA was prepared to handle it swiftly thanks in part to the thousands of procedures that have been written to cover every aspect of the ISS's operations. The ISS is not unique in this regard: Every NASA mission requires well-written procedures-or detailed lists of step-by-step instructions-that cover how to operate equipment in any scenario, from normal operations to the challenges created by malfunctioning hardware or software. Astronauts and mission control train and drill extensively in procedures to ensure they know what the proper procedures are and when they should be used. These procedures used to be exclusively written on paper, but over the past decade, NASA has transitioned to digital formats. Electronic-based documentation simplifies storage and use, allowing astronauts and flight controllers to find instructions more quickly and display them through a variety of media. Electronic procedures are also a crucial step toward automation: once instructions are digital, procedure display software can be designed to assist in authoring, reviewing, and even executing them.

Bulgarian National Digital Seismological Network

NASA Astrophysics Data System (ADS)

Dimitrova, L.; Solakov, D.; Nikolova, S.; Stoyanov, S.; Simeonova, S.; Zimakov, L. G.; Khaikin, L.

2011-12-01

The Bulgarian National Digital Seismological Network (BNDSN) consists of a National Data Center (NDC), 13 stations equipped with RefTek High Resolution Broadband Seismic Recorders - model DAS 130-01/3, 1 station equipped with Quanterra 680 and broadband sensors and accelerometers. Real-time data transfer from seismic stations to NDC is realized via Virtual Private Network of the Bulgarian Telecommunication Company. The communication interruptions don't cause any data loss at the NDC. The data are backed up in the field station recorder's 4Mb RAM memory and are retransmitted to the NDC immediately after the communication link is re-established. The recorders are equipped with 2 compact flash disks able to save more than 1 month long data. The data from the flash disks can be downloaded remotely using FTP. The data acquisition and processing hardware redundancy at the NDC is achieved by two clustered SUN servers and two Blade Workstations. To secure the acquisition, processing and data storage processes a three layer local network is designed at the NDC. Real-time data acquisition is performed using REFTEK's full duplex error-correction protocol RTPD. Data from the Quanterra recorder and foreign stations are fed into RTPD in real-time via SeisComP/SeedLink protocol. Using SeisComP/SeedLink software the NDC transfers real-time data to INGV-Roma, NEIC-USA, ORFEUS Data Center. Regional real-time data exchange with Romania, Macedonia, Serbia and Greece is established at the NDC also. Data processing is performed by the Seismic Network Data Processor (SNDP) software package running on the both Servers. SNDP includes subsystems: Real-time subsystem (RTS_SNDP) - for signal detection; evaluation of the signal parameters; phase identification and association; source estimation; Seismic analysis subsystem (SAS_SNDP) - for interactive data processing; Early warning subsystem (EWS_SNDP) - based on the first arrived P-phases. The signal detection process is performed by traditional STA/LTA detection algorithm. The filter parameters of the detectors are defined on the base of previously evaluated ambient noise at the seismic stations. Some extra modules for network command/control, state-of-health network monitoring and data archiving are running as well in the National Data Center. Three types of archives are produced in the NDC - two continuous - miniSEED format and RefTek PASSCAL format; and one event oriented in CSS3.0 scheme format. Modern digital equipment and broad-band seismometers installed at Bulgarian seismic stations, careful selection of the software packages for automatic and interactive data processing in the data center proved to be suitable choice for the purposes of BNDSN and NDC: ? to ensure reliable automatic localization of the seismic events and rapid notification of the governmental authorities in case of felt earthquakes on the territory of Bulgaria; ? to provide a modern basis for seismological studies in Bulgaria.

Modeling, simulation and control for a cryogenic fluid management facility, preliminary report

NASA Technical Reports Server (NTRS)

Turner, Max A.; Vanbuskirk, P. D.

1986-01-01

The synthesis of a control system for a cryogenic fluid management facility was studied. The severe demand for reliability as well as instrumentation and control unique to the Space Station environment are prime considerations. Realizing that the effective control system depends heavily on quantitative description of the facility dynamics, a methodology for process identification and parameter estimation is postulated. A block diagram of the associated control system is also produced. Finally, an on-line adaptive control strategy is developed utilizing optimization of the velocity form control parameters (proportional gains, integration and derivative time constants) in appropriate difference equations for direct digital control. Of special concern are the communications, software and hardware supporting interaction between the ground and orbital systems. It is visualized that specialist in the OSI/ISO utilizing the Ada programming language will influence further development, testing and validation of the simplistic models presented here for adaptation to the actual flight environment.

Virtual interactive presence and augmented reality (VIPAR) for remote surgical assistance.

PubMed

Shenai, Mahesh B; Dillavou, Marcus; Shum, Corey; Ross, Douglas; Tubbs, Richard S; Shih, Alan; Guthrie, Barton L

2011-03-01

Surgery is a highly technical field that combines continuous decision-making with the coordination of spatiovisual tasks. We designed a virtual interactive presence and augmented reality (VIPAR) platform that allows a remote surgeon to deliver real-time virtual assistance to a local surgeon, over a standard Internet connection. The VIPAR system consisted of a "local" and a "remote" station, each situated over a surgical field and a blue screen, respectively. Each station was equipped with a digital viewpiece, composed of 2 cameras for stereoscopic capture, and a high-definition viewer displaying a virtual field. The virtual field was created by digitally compositing selected elements within the remote field into the local field. The viewpieces were controlled by workstations mutually connected by the Internet, allowing virtual remote interaction in real time. Digital renderings derived from volumetric MRI were added to the virtual field to augment the surgeon's reality. For demonstration, a fixed-formalin cadaver head and neck were obtained, and a carotid endarterectomy (CEA) and pterional craniotomy were performed under the VIPAR system. The VIPAR system allowed for real-time, virtual interaction between a local (resident) and remote (attending) surgeon. In both carotid and pterional dissections, major anatomic structures were visualized and identified. Virtual interaction permitted remote instruction for the local surgeon, and MRI augmentation provided spatial guidance to both surgeons. Camera resolution, color contrast, time lag, and depth perception were identified as technical issues requiring further optimization. Virtual interactive presence and augmented reality provide a novel platform for remote surgical assistance, with multiple applications in surgical training and remote expert assistance.

Wireless Phone Threat Assessment for Aircraft Communication and Navigation Radios

NASA Technical Reports Server (NTRS)

Nguyens, T. X.; Koppen, S. V.; Smith, L. J.; Williams, R. A.; Salud, M. T.

2005-01-01

Emissions in aircraft communication and navigation bands are measured for the latest generation of wireless phones. The two wireless technologies considered, GSM/GPRS and CDMA2000, are the latest available to general consumers in the U.S. A base-station simulator is used to control the phones. The measurements are conducted using reverberation chambers, and the results are compared against FCC and aircraft installed equipment emission limits. The results are also compared against baseline emissions from laptop computers and personal digital assistant devices that are currently allowed to operate on aircraft.

Nuclear Science Symposium, 4th, and Nuclear Power Systems Symposium, 9th, San Francisco, Calif., October 19-21, 1977, Proceedings

NASA Technical Reports Server (NTRS)

1978-01-01

Consideration is given to the following types of high energy physics instrumentation: drift chambers, multiwire proportional chambers, calorimeters, optical detectors, ionization and scintillation detectors, solid state detectors, and electronic and digital subsystems. Attention is also paid to reactor instrumentation, nuclear medicine instrumentation, data acquisition systems for nuclear instrumentation, microprocessor applications in nuclear science, environmental instrumentation, control and instrumentation of nuclear power generating stations, and radiation monitoring. Papers are also presented on instrumentation for the High Energy Astronomy Observatory.

NASA Lewis F100 engine testing

NASA Technical Reports Server (NTRS)

Werner, R. A.; Willoh, R. G., Jr.; Abdelwahab, M.

1984-01-01

Two builds of an F100 engine model derivative (EMD) engine were evaluated for improvements in engine components and digital electronic engine control (DEEC) logic. Two DEEC flight logics were verified throughout the flight envelope in support of flight clearance for the F100 engine model derivative program (EMPD). A nozzle instability and a faster augmentor transient capability was investigated in support of the F-15 DEEC flight program. Off schedule coupled system mode fan flutter, DEEC nose-boom pressure correlation, DEEC station six pressure comparison, and a new fan inlet variable vane (CIVV) schedule are identified.

Data link communications in the National Airspace System

NASA Technical Reports Server (NTRS)

Lee, Alfred T.

1989-01-01

In the near future, conventional radio communications, currently the primary medium for the transfer of information between aircraft and ground stations, will be replaced by digital data link. This paper briefly describes this technology and summarizes what are believed to be the principal human factor issues associated with data link implementation in the airspace system. Integration of data link communications with existing systems on the flight deck and in the Air Traffic Control system is discussed with regard for both near term implementation and longer term operational issues.

LBR-2 Earth stations for the ACTS program

NASA Technical Reports Server (NTRS)

Oreilly, Michael; Jirberg, Russell; Spisz, Ernie

1990-01-01

The Low Burst Rate-2 (LBR-2) earth station being developed for NASA's Advanced Communications Technology Satellite (ACTS) is described. The LBR-2 is one of two earth station types that operate through the satellite's baseband processor. The LBR-2 is a small earth terminal (VSAT)-like earth station that is easily sited on a user's premises, and provides up to 1.792 megabits per second (MBPS) of voice, video, and data communications. Addressed here is the design of the antenna, the rf subsystems, the digital processing equipment, and the user interface equipment.

Nursing distance education at the dawn of digital broadcasting: a case study in collaboration.

PubMed

Whitmore, Brent A

2005-08-01

For separate reasons, schools of nursing and public television stations are finding it a matter of mutual interest to work together in the production of distance education content for college nursing students in their communities. The advent of digital television (DTV) broadcasting has given these distance education partnerships new capabilities for reaching more potential students. In this article, I review one innovative collaboration between several nursing education programs and a public broadcasting service member station in South Texas. In this pilot project, nursing faculty were trained in television production techniques and became producers of DTV instructional video material. This case study demonstrates a number of ways in which nursing distance education programs can benefit by designing and delivering course material via digital broadcasting. It also highlights several difficulties that should be considered by distance educators prior to embarking on DTV curriculum development projects.

Mapping of Polar Areas Based on High-Resolution Satellite Images: The Example of the Henryk Arctowski Polish Antarctic Station

NASA Astrophysics Data System (ADS)

Kurczyński, Zdzisław; Różycki, Sebastian; Bylina, Paweł

2017-12-01

To produce orthophotomaps or digital elevation models, the most commonly used method is photogrammetric measurement. However, the use of aerial images is not easy in polar regions for logistical reasons. In these areas, remote sensing data acquired from satellite systems is much more useful. This paper presents the basic technical requirements of different products which can be obtain (in particular orthoimages and digital elevation model (DEM)) using Very-High-Resolution Satellite (VHRS) images. The study area was situated in the vicinity of the Henryk Arctowski Polish Antarctic Station on the Western Shore of Admiralty Bay, King George Island, Western Antarctic. Image processing was applied on two triplets of images acquired by the Pléiades 1A and 1B in March 2013. The results of the generation of orthoimages from the Pléiades systems without control points showed that the proposed method can achieve Root Mean Squared Error (RMSE) of 3-9 m. The presented Pléiades images are useful for thematic remote sensing analysis and processing of measurements. Using satellite images to produce remote sensing products for polar regions is highly beneficial and reliable and compares well with more expensive airborne photographs or field surveys.

Hatch leading into U.S. Laboratory / Destiny module

NASA Image and Video Library

2001-02-11

STS98-E-5114 (11 February 2001) --- This medium close-up shot, photographed with a digital still camera, shows Unity's closed hatch to the newly delivered Destiny laboratory. The crews of Atlantis and the International Space Station opened the laboratory, shortly after this photo was made on Feb. 11, and the astronauts and cosmonauts spent the first full day of what are planned to be years of work ahead inside the orbiting science and command center. Station commander William M. (Bill) Shepherd opened the Destiny hatch, and he and shuttle commander Kenneth D. Cockrell ventured inside at 8:38 a.m. (CST), Feb. 11. As depicted in subsequent digital images in this series, members of both crews went to work quickly inside the new module, activating air systems, fire extinguishers, alarm systems, computers and internal communications. The crew also continued equipment transfers from the shuttle to the station.

Calibration of Low Cost Digital Camera Using Data from Simultaneous LIDAR and Photogrammetric Surveys

NASA Astrophysics Data System (ADS)

Mitishita, E.; Debiasi, P.; Hainosz, F.; Centeno, J.

2012-07-01

Digital photogrammetric products from the integration of imagery and lidar datasets are a reality nowadays. When the imagery and lidar surveys are performed together and the camera is connected to the lidar system, a direct georeferencing can be applied to compute the exterior orientation parameters of the images. Direct georeferencing of the images requires accurate interior orientation parameters to perform photogrammetric application. Camera calibration is a procedure applied to compute the interior orientation parameters (IOPs). Calibration researches have established that to obtain accurate IOPs, the calibration must be performed with same or equal condition that the photogrammetric survey is done. This paper shows the methodology and experiments results from in situ self-calibration using a simultaneous images block and lidar dataset. The calibration results are analyzed and discussed. To perform this research a test field was fixed in an urban area. A set of signalized points was implanted on the test field to use as the check points or control points. The photogrammetric images and lidar dataset of the test field were taken simultaneously. Four strips of flight were used to obtain a cross layout. The strips were taken with opposite directions of flight (W-E, E-W, N-S and S-N). The Kodak DSC Pro SLR/c digital camera was connected to the lidar system. The coordinates of the exposition station were computed from the lidar trajectory. Different layouts of vertical control points were used in the calibration experiments. The experiments use vertical coordinates from precise differential GPS survey or computed by an interpolation procedure using the lidar dataset. The positions of the exposition stations are used as control points in the calibration procedure to eliminate the linear dependency of the group of interior and exterior orientation parameters. This linear dependency happens, in the calibration procedure, when the vertical images and flat test field are used. The mathematic correlation of the interior and exterior orientation parameters are analyzed and discussed. The accuracies of the calibration experiments are, as well, analyzed and discussed.

47 CFR 2.302 - Call signs.

Code of Federal Regulations, 2012 CFR

2012-10-01

... location when required) KAA200 through KZZ999.WAA200 through WZZ999. Ship telegraph 4 letters 1 KAAA through KZZZ.WAAA through WZZZ. Ship telephone 2 letters, 4 digits, or 3 letters, 4 digits 1 WA2000... stations operating in two or more classes are authorized to the same licensee for the same location, the...

47 CFR 2.302 - Call signs.

Code of Federal Regulations, 2013 CFR

2013-10-01

... location when required) KAA200 through KZZ999.WAA200 through WZZ999. Ship telegraph 4 letters 1 KAAA through KZZZ.WAAA through WZZZ. Ship telephone 2 letters, 4 digits, or 3 letters, 4 digits 1 WA2000... stations operating in two or more classes are authorized to the same licensee for the same location, the...

47 CFR 2.302 - Call signs.

Code of Federal Regulations, 2014 CFR

2014-10-01

... location when required) KAA200 through KZZ999.WAA200 through WZZ999. Ship telegraph 4 letters 1 KAAA through KZZZ.WAAA through WZZZ. Ship telephone 2 letters, 4 digits, or 3 letters, 4 digits 1 WA2000... stations operating in two or more classes are authorized to the same licensee for the same location, the...

47 CFR 2.302 - Call signs.

Code of Federal Regulations, 2011 CFR

2011-10-01

... location when required) KAA200 through KZZ999. WAA200 through WZZ999. Ship telegraph 4 letters 1 KAAA through KZZZ. WAAA through WZZZ. Ship telephone 2 letters, 4 digits, or 3 letters, 4 digits 1 WA2000... stations operating in two or more classes are authorized to the same licensee for the same location, the...

37 CFR 386.2 - Royalty fee for secondary transmission by satellite carriers.

Code of Federal Regulations, 2011 CFR

2011-07-01

... BOARD, LIBRARY OF CONGRESS RATES AND TERMS FOR STATUTORY LICENSES ADJUSTMENT OF ROYALTY FEES FOR... a given month. (2) In the case of a station engaged in digital multicasting, the rates set forth in paragraph (b) of this section shall apply to each digital stream that a satellite carrier or distributor...

37 CFR 386.2 - Royalty fee for secondary transmission by satellite carriers.

Code of Federal Regulations, 2013 CFR

2013-07-01

... BOARD, LIBRARY OF CONGRESS RATES AND TERMS FOR STATUTORY LICENSES ADJUSTMENT OF ROYALTY FEES FOR... a given month. (2) In the case of a station engaged in digital multicasting, the rates set forth in paragraph (b) of this section shall apply to each digital stream that a satellite carrier or distributor...

37 CFR 386.2 - Royalty fee for secondary transmission by satellite carriers.

Code of Federal Regulations, 2014 CFR

2014-07-01

... BOARD, LIBRARY OF CONGRESS RATES AND TERMS FOR STATUTORY LICENSES ADJUSTMENT OF ROYALTY FEES FOR... a given month. (2) In the case of a station engaged in digital multicasting, the rates set forth in paragraph (b) of this section shall apply to each digital stream that a satellite carrier or distributor...

37 CFR 386.2 - Royalty fee for secondary transmission by satellite carriers.

Code of Federal Regulations, 2012 CFR

2012-07-01

... BOARD, LIBRARY OF CONGRESS RATES AND TERMS FOR STATUTORY LICENSES ADJUSTMENT OF ROYALTY FEES FOR... a given month. (2) In the case of a station engaged in digital multicasting, the rates set forth in paragraph (b) of this section shall apply to each digital stream that a satellite carrier or distributor...

MS Grunsfeld at commander's station on forward flight deck

NASA Image and Video Library

2002-03-08

STS109-E-5720 (8 March 2002) --- Astronaut John M. Grunsfeld, STS-109 payload commander, wearing a portion of the extravehicular mobility unit (EMU) space suit, occupies the commander’s station on the forward flight deck of the Space Shuttle Columbia. The image was recorded with a digital still camera.

A Computerized Weather Station for the Apple IIe.

ERIC Educational Resources Information Center

Lorson, Mark V.

Predicting weather conditions is a topic of interest for students who want to make plans for outside activities. This paper discusses the development of an inexpensive computer-interfaced classroom weather station using an Apple IIe computer that provides the viewer with up to the minute digital readings of inside and outside temperature,…

View of the extended SSRMS or Canadarm2 with cloudy view in the background

NASA Image and Video Library

2003-01-09

ISS006-E-16953 (9 January 2003) --- The Space Station Remote Manipulator System (SSRMS) or Canadarm2 is backdropped against the Caribbean Sea in this digital still camera's view taken from the International Space Station (ISS). Puerto Rico is in the left side of the frame.

77 FR 29589 - Announcement of Grant Application Deadlines and Funding Levels

Federal Register 2010, 2011, 2012, 2013, 2014

2012-05-18

... transition of their stations across all equipment. Rural stations often have translators serving small or... not apply to translators, and only recently in 2011 the FCC adopted a final deadline for analog-to-digital conversion of all translators by September 1, 2015. Because of this, translators have been allowed...

Wireless Acoustic Measurement System

NASA Technical Reports Server (NTRS)

Anderson, Paul D.; Dorland, Wade D.; Jolly, Ronald L.

2007-01-01

A prototype wireless acoustic measurement system (WAMS) is one of two main subsystems of the Acoustic Prediction/ Measurement Tool, which comprises software, acoustic instrumentation, and electronic hardware combined to afford integrated capabilities for predicting and measuring noise emitted by rocket and jet engines. The other main subsystem is described in the article on page 8. The WAMS includes analog acoustic measurement instrumentation and analog and digital electronic circuitry combined with computer wireless local-area networking to enable (1) measurement of sound-pressure levels at multiple locations in the sound field of an engine under test and (2) recording and processing of the measurement data. At each field location, the measurements are taken by a portable unit, denoted a field station. There are ten field stations, each of which can take two channels of measurements. Each field station is equipped with two instrumentation microphones, a micro- ATX computer, a wireless network adapter, an environmental enclosure, a directional radio antenna, and a battery power supply. The environmental enclosure shields the computer from weather and from extreme acoustically induced vibrations. The power supply is based on a marine-service lead-acid storage battery that has enough capacity to support operation for as long as 10 hours. A desktop computer serves as a control server for the WAMS. The server is connected to a wireless router for communication with the field stations via a wireless local-area network that complies with wireless-network standard 802.11b of the Institute of Electrical and Electronics Engineers. The router and the wireless network adapters are controlled by use of Linux-compatible driver software. The server runs custom Linux software for synchronizing the recording of measurement data in the field stations. The software includes a module that provides an intuitive graphical user interface through which an operator at the control server can control the operations of the field stations for calibration and for recording of measurement data. A test engineer positions and activates the WAMS. The WAMS automatically establishes the wireless network. Next, the engineer performs pretest calibrations. Then the engineer executes the test and measurement procedures. After the test, the raw measurement files are copied and transferred, through the wireless network, to a hard disk in the control server. Subsequently, the data are processed into 1.3-octave spectrograms.

Wireless Acoustic Measurement System

NASA Technical Reports Server (NTRS)

Anderson, Paul D.; Dorland, Wade D.

2005-01-01

A prototype wireless acoustic measurement system (WAMS) is one of two main subsystems of the Acoustic Prediction/Measurement Tool, which comprises software, acoustic instrumentation, and electronic hardware combined to afford integrated capabilities for predicting and measuring noise emitted by rocket and jet engines. The other main subsystem is described in "Predicting Rocket or Jet Noise in Real Time" (SSC-00215-1), which appears elsewhere in this issue of NASA Tech Briefs. The WAMS includes analog acoustic measurement instrumentation and analog and digital electronic circuitry combined with computer wireless local-area networking to enable (1) measurement of sound-pressure levels at multiple locations in the sound field of an engine under test and (2) recording and processing of the measurement data. At each field location, the measurements are taken by a portable unit, denoted a field station. There are ten field stations, each of which can take two channels of measurements. Each field station is equipped with two instrumentation microphones, a micro-ATX computer, a wireless network adapter, an environmental enclosure, a directional radio antenna, and a battery power supply. The environmental enclosure shields the computer from weather and from extreme acoustically induced vibrations. The power supply is based on a marine-service lead-acid storage battery that has enough capacity to support operation for as long as 10 hours. A desktop computer serves as a control server for the WAMS. The server is connected to a wireless router for communication with the field stations via a wireless local-area network that complies with wireless-network standard 802.11b of the Institute of Electrical and Electronics Engineers. The router and the wireless network adapters are controlled by use of Linux-compatible driver software. The server runs custom Linux software for synchronizing the recording of measurement data in the field stations. The software includes a module that provides an intuitive graphical user interface through which an operator at the control server can control the operations of the field stations for calibration and for recording of measurement data. A test engineer positions and activates the WAMS. The WAMS automatically establishes the wireless network. Next, the engineer performs pretest calibrations. Then the engineer executes the test and measurement procedures. After the test, the raw measurement files are copied and transferred, through the wireless network, to a hard disk in the control server. Subsequently, the data are processed into 1/3-octave spectrograms.

WE-D-BRD-01: Innovation in Radiation Therapy Delivery: Advanced Digital Linac Features

DOE Office of Scientific and Technical Information (OSTI.GOV)

Xing, L; Wong, J; Li, R

2014-06-15

Last few years has witnessed significant advances in linac technology and therapeutic dose delivery method. Digital linacs equipped with high dose rate FFF beams have been clinically implemented in a number of hospitals. Gated VMAT is becoming increasingly popular in treating tumors affected by respiratory motion. This session is devoted to update the audience with these technical advances and to present our experience in clinically implementing the new linacs and dose delivery methods. Topics to be covered include, technical features of new generation of linacs from different vendors, dosimetric characteristics and clinical need for FFF-beam based IMRT and VMAT, respiration-gatedmore » VMAT, the concept and implementation of station parameter optimized radiation therapy (SPORT), beam level imaging and onboard image guidance tools. Emphasis will be on providing fundamental understanding of the new treatment delivery and image guidance strategies, control systems, and the associated dosimetric characteristics. Commissioning and acceptance experience on these new treatment delivery technologies will be reported. Clinical experience and challenges encountered during the process of implementation of the new treatment techniques and future applications of the systems will also be highlighted. Learning Objectives: Present background knowledge of emerging digital linacs and summarize their key geometric and dosimetric features. SPORT as an emerging radiation therapy modality specifically designed to take advantage of digital linacs. Discuss issues related to the acceptance and commissioning of the digital linacs and FFF beams. Describe clinical utility of the new generation of digital linacs and their future applications.« less

Pattern Generator for Bench Test of Digital Boards

NASA Technical Reports Server (NTRS)

Berkun, Andrew C.; Chu, Anhua J.

2012-01-01

All efforts to develop electronic equipment reach a stage where they need a board test station for each board. The SMAP digital system consists of three board types that interact with each other using interfaces with critical timing. Each board needs to be tested individually before combining into the integrated digital electronics system. Each board needs critical timing signals from the others to be able to operate. A bench test system was developed to support test of each board. The test system produces all the outputs of the control and timing unit, and is delivered much earlier than the timing unit. Timing signals are treated as data. A large file is generated containing the state of every timing signal at any instant. This file is streamed out to an IO card, which is wired directly to the device-under-test (DUT) input pins. This provides a flexible test environment that can be adapted to any of the boards required to test in a standalone configuration. The problem of generating the critical timing signals is then transferred from a hardware problem to a software problem where it is more easily dealt with.

Weather satellite picture receiving stations, APT digital scan converter

NASA Technical Reports Server (NTRS)

Vermillion, C. H.; Kamowski, J. C.

1975-01-01

The automatic picture transmission digital scan converter is used at ground stations to convert signals received from scanning radiometers to data compatible with ground equipment designed to receive signals from vidicons aboard operational meteorological satellites. Information necessary to understand the circuit theory, functional operation, general construction and calibration of the converter is provided. Brief and detailed descriptions of each of the individual circuits are included, accompanied by a schematic diagram contained at the end of each circuit description. Listings of integral parts and testing equipment required as well as an overall wiring diagram are included. This unit will enable the user to readily accept and process weather photographs from the operational meteorological satellites.

Increasing capacity of baseband digital data communication networks

DOEpatents

Frankel, Robert S.; Herman, Alexander

1985-01-01

This invention provides broadband network capabilities for baseband digital collision detection transceiver equipment for communication between a plurality of data stations by affording simultaneous transmission of multiple channels over a broadband pass transmission link such as a coaxial cable. Thus, a fundamental carrier wave is transmitted on said link, received at local data stations and used to detect signals on different baseband channels for reception. For transmission the carrier wave typically is used for segregating a plurality of at least two transmission channels into typically single sideband upper and lower pass bands of baseband bandwidth capability adequately separated with guard bands to permit simple separation for receiving by means of pass band filters, etc.

Increasing capacity of baseband digital data communication networks

DOEpatents

Frankel, R.S.; Herman, A.

This invention provides broadbank network capabilities for baseband digital collision detection transceiver equipment for communication between a plurality of data stations by affording simultaneous transmission of multiple channels over a broadband pass transmission link such as a coaxial cable. Thus, a fundamental carrier wave is transmitted on said link, received at local data stations and used to detect signals on different baseband channels for reception. For transmission the carrier wave typically is used for segregating a plurality of at least two transmission channels into typically single sideband upper and lower pass bands of baseband bandwidth capability adequately separated with guard bands to permit simple separation for receiving by means of pass band filters, etc.

Digitalizing historical high resolution water level data: Challenges and opportunities

NASA Astrophysics Data System (ADS)

Holinde, Lars; Hein, Hartmut; Barjenbruch, Ulrich

2017-04-01

Historical tide-gauge data offer the opportunities for determining variations in key characteristics for water level data and the analyses of past extreme events (storm surges). These information are important for calculating future trends and scenarios. But there are challenges involved due to the extensive effort needed to digitalize gauge sheets and quality control the resulting historical data. Based on these conditions, two main sources for inaccuracies in historical time series can be identified. First are several challenges due to the digitalization of the historical data, e.g. general quality of the sheets, multiple crossing lines of the observed water levels and additional comments on the sheet describing problems or additional information during the measurements. Second are problems during the measurements themselves. These can include the incorrect positioning of the sheets, trouble with the tide-gauge and maintenance. Errors resulting from these problems can be e.g. flat lines, discontinuities and outlier. Especially, the characterization of outliers has to be conducted carefully, to distinguish between real outliers and the appearance of extreme events. Methods for the quality control process involve the use of statistics, machine learning and neural networks. These will be described and applied to three different time series from tide gauge stations at the cost of Lower Saxony, Germany. Resulting difficulties and outcomes of the quality control process will be presented and explained. Furthermore, we will present a first glance at analyses for these time series.

Rescuing biogeographic legacy data: The "Thor" Expedition, a historical oceanographic expedition to the Mediterranean Sea

PubMed Central

Mavraki, Dimitra; Fanini, Lucia; Tsompanou, Marilena; Gerovasileiou, Vasilis; Nikolopoulou, Stamatina; Chatzinikolaou, Eva; Plaitis, Wanda

2016-01-01

Abstract Background This article describes the digitization of a series of historical datasets based οn the reports of the 1908–1910 Danish Oceanographical Expeditions to the Mediterranean and adjacent seas. All station and sampling metadata as well as biodiversity data regarding calcareous rhodophytes, pelagic polychaetes, and fish (families Engraulidae and Clupeidae) obtained during these expeditions were digitized within the activities of the LifeWatchGreece Research Ιnfrastructure project and presented in the present paper. The aim was to safeguard public data availability by using an open access infrastructure, and to prevent potential loss of valuable historical data on the Mediterranean marine biodiversity. New information The datasets digitized here cover 2,043 samples taken at 567 stations during a time period from 1904 to 1930 in the Mediterranean and adjacent seas. The samples resulted in 1,588 occurrence records of pelagic polychaetes, fish (Clupeiformes) and calcareous algae (Rhodophyta). In addition, basic environmental data (e.g. sea surface temperature, salinity) as well as meterological conditions are included for most sampling events. In addition to the description of the digitized datasets, a detailed description of the problems encountered during the digitization of this historical dataset and a discussion on the value of such data are provided. PMID:28174510

Observations and modeling of seismic background noise

USGS Publications Warehouse

Peterson, Jon R.

1993-01-01

The preparation of this report had two purposes. One was to present a catalog of seismic background noise spectra obtained from a worldwide network of seismograph stations. The other purpose was to refine and document models of seismic background noise that have been in use for several years. The second objective was, in fact, the principal reason that this study was initiated and influenced the procedures used in collecting and processing the data.With a single exception, all of the data used in this study were extracted from the digital data archive at the U.S. Geological Survey's Albuquerque Seismological Laboratory (ASL). This archive dates from 1972 when ASL first began deploying digital seismograph systems and collecting and distributing digital data under the sponsorship of the Defense Advanced Research Projects Agency (DARPA). There have been many changes and additions to the global seismograph networks during the past twenty years, but perhaps none as significant as the current deployment of very broadband seismographs by the U.S. Geological Survey (USGS) and the University of California San Diego (UCSD) under the scientific direction of the IRIS consortium. The new data acquisition systems have extended the bandwidth and resolution of seismic recording, and they utilize high-density recording media that permit the continuous recording of broadband data. The data improvements and continuous recording greatly benefit and simplify surveys of seismic background noise.Although there are many other sources of digital data, the ASL archive data were used almost exclusively because of accessibility and because the data systems and their calibration are well documented for the most part. Fortunately, the ASL archive contains high-quality data from other stations in addition to those deployed by the USGS. Included are data from UCSD IRIS/IDA stations, the Regional Seismic Test Network (RSTN) deployed by Sandia National Laboratories (SNL), and the TERRAscope network deployed by the California Institute of Technology in cooperation with other institutions.A map showing the approximate locations of the stations used in this study is provided in Figure 1. One might hope for a better distribution of stations in the southern hemisphere, especially Africa and South America, in order to look for regional variations in seismic noise (apart from the major differences between continental, coastal and island sites). Unfortunately, anyone looking for subtle regional variations in seismic noise is probably going to be disappointed by the spectral data presented in this report because much of the station data appear to be dominated by local disturbances caused by instrumental, environmental, cultural, or surf noise. Better instruments and better instrument siting, or a well-funded field program, will be needed before a global isoseismal noise map can be produced. However, by assembling a composite of background noise from a large network of stations, many of the local station variables are masked, and it is possible to create generalized spectral plots of Earth noise for hypothetical quiet and noisy station sites.

Voss with video camera in Service Module

NASA Image and Video Library

2001-04-08

ISS002-E-5329 (08 April 2001) --- Astronaut James S. Voss, Expedition Two flight engineer, sets up a video camera on a mounting bracket in the Zvezda / Service Module of the International Space Station (ISS). A 35mm camera and a digital still camera are also visible nearby. This image was recorded with a digital still camera.

78 FR 8524 - Information Collection Being Reviewed by the Federal Communications Commission Under Delegated...

Federal Register 2010, 2011, 2012, 2013, 2014

2013-02-06

... Burden: 1,780 hours. Total Annual Cost: $606,500. Privacy Impact Assessment: No impact(s). Nature and... stations to commence operation of FM digital facilities with operating power up to -14 dB upon notice to... days of commencing in-band, on channel (IBOC) digital operation. The notification must include the...

PromISS 4 hardware set up in the MSG during Expedition 12

NASA Image and Video Library

2006-01-18

ISS012-E-16184 (18 Jan. 2006) --- Astronaut William S. (Bill) McArthur, Jr., Expedition 12 commander and NASA space station science officer, sets up the Protein Crystal Growth Monitoring by Digital Holographic Microscope (PromISS) experiment hardware inside the Microgravity Science Glovebox (MSG) facility in the Destiny laboratory on the International Space Station.

Wetherbee with the ship's log in the middeck

NASA Image and Video Library

2001-03-17

STS102-E-5234 (17 March 2001) --- On Discovery's mid deck, astronauts William M. (Bill) Shepherd (left) and James D. Wetherbee discuss events of the joint activities among shuttle and station crew members. Wetherbee, STS-102 commander, looks over the ship's log with the outgoing station commander. The image was recorded with a digital still camera.

47 CFR 73.624 - Digital television broadcast stations.

Code of Federal Regulations, 2011 CFR

2011-10-01

... video program signal at no direct charge to viewers on the DTV channel. Until such time as a DTV station... licensee transmits a video program signal on its analog television channel, it must also transmit at least one over-the-air video program signal on the DTV channel. The DTV service that is provided pursuant to...

47 CFR 73.624 - Digital television broadcast stations.

Code of Federal Regulations, 2010 CFR

2010-10-01

... video program signal at no direct charge to viewers on the DTV channel. Until such time as a DTV station... licensee transmits a video program signal on its analog television channel, it must also transmit at least one over-the-air video program signal on the DTV channel. The DTV service that is provided pursuant to...

47 CFR 73.624 - Digital television broadcast stations.

Code of Federal Regulations, 2013 CFR

2013-10-01

... video program signal at no direct charge to viewers on the DTV channel. Until such time as a DTV station... licensee transmits a video program signal on its analog television channel, it must also transmit at least one over-the-air video program signal on the DTV channel. The DTV service that is provided pursuant to...

47 CFR 73.624 - Digital television broadcast stations.

Code of Federal Regulations, 2014 CFR

2014-10-01

... video program signal at no direct charge to viewers on the DTV channel. Until such time as a DTV station... licensee transmits a video program signal on its analog television channel, it must also transmit at least one over-the-air video program signal on the DTV channel. The DTV service that is provided pursuant to...

47 CFR 73.624 - Digital television broadcast stations.

Code of Federal Regulations, 2012 CFR

2012-10-01

... video program signal at no direct charge to viewers on the DTV channel. Until such time as a DTV station... licensee transmits a video program signal on its analog television channel, it must also transmit at least one over-the-air video program signal on the DTV channel. The DTV service that is provided pursuant to...

A Synchronous Digital Duplexing Technique for OFDMA-Based Indoor Communications

NASA Astrophysics Data System (ADS)

Park, Chang-Hwan; Ko, Yo-Han; Kim, Yeong-Jun; Park, Kyung-Won; Jeon, Won-Gi; Paik, Jong-Ho; Lee, Seok-Pil; Cho, Yong-Soo

In this paper, we propose a new digital duplexing scheme, called synchronous digital duplexing (SDD), which can increase data efficiency and flexibility of resource by transmitting uplink signal and downlink signal simultaneously in wireless communication. In order to transmit uplink and downlink signals simultaneously, the proposed SDD obtains mutual information among subscriber stations (SSs) with a mutual ranging symbol. This information is used for selection of transmission time, decision on cyclic suffix (CS) insertion, determination of CS length, and re-establishment of FFT starting point.

Forward view of the ISS taken during final flyaround

NASA Image and Video Library

2001-04-29

S100-E-5958 (29 April 2001) --- Backdropped against the blue and white Earth and sporting a readily visible new addition in the form of the Canadarm2 or space station robotic arm, the International Space Station (ISS) was photographed following separation from the Space Shuttle Endeavour. With six astronauts and a Rosaviakosmos cosmonaut aboard the shuttle, the spacecraft performed a fly-around survey of the station, which was inhabited by two astronauts and a Russian cosmonaut. The image was recorded with a digital still camera.

International Space Station (ISS)

NASA Image and Video Library

2001-09-16

The setting sun and the thin blue airglow line at Earth's horizon was captured by the International Space Station's (ISS) Expedition Three crewmembers with a digital camera. Some of the Station's components are silhouetted in the foreground. The crew was launched aboard the Space Shuttle Orbiter Discovery STS-105 mission, on August 10, 2001, replacing the Expedition Two crew. After marning the orbiting ISS for 128 consecutive days, the three returned to Earth on December 17, 2001, aboard the STS-108 mission Space Shuttle Orbiter Endeavour.

A high-speed network for cardiac image review.

PubMed

Elion, J L; Petrocelli, R R

1994-01-01

A high-speed fiber-based network for the transmission and display of digitized full-motion cardiac images has been developed. Based on Asynchronous Transfer Mode (ATM), the network is scaleable, meaning that the same software and hardware is used for a small local area network or for a large multi-institutional network. The system can handle uncompressed digital angiographic images, considered to be at the "high-end" of the bandwidth requirements. Along with the networking, a general-purpose multi-modality review station has been implemented without specialized hardware. This station can store a full injection sequence in "loop RAM" in a 512 x 512 format, then interpolate to 1024 x 1024 while displaying at 30 frames per second. The network and review stations connect to a central file server that uses a virtual file system to make a large high-speed RAID storage disk and associated off-line storage tapes and cartridges all appear as a single large file system to the software. In addition to supporting archival storage and review, the system can also digitize live video using high-speed Direct Memory Access (DMA) from the frame grabber to present uncompressed data to the network. Fully functional prototypes have provided the proof of concept, with full deployment in the institution planned as the next stage.

A high-speed network for cardiac image review.

PubMed Central

Elion, J. L.; Petrocelli, R. R.

1994-01-01

A high-speed fiber-based network for the transmission and display of digitized full-motion cardiac images has been developed. Based on Asynchronous Transfer Mode (ATM), the network is scaleable, meaning that the same software and hardware is used for a small local area network or for a large multi-institutional network. The system can handle uncompressed digital angiographic images, considered to be at the "high-end" of the bandwidth requirements. Along with the networking, a general-purpose multi-modality review station has been implemented without specialized hardware. This station can store a full injection sequence in "loop RAM" in a 512 x 512 format, then interpolate to 1024 x 1024 while displaying at 30 frames per second. The network and review stations connect to a central file server that uses a virtual file system to make a large high-speed RAID storage disk and associated off-line storage tapes and cartridges all appear as a single large file system to the software. In addition to supporting archival storage and review, the system can also digitize live video using high-speed Direct Memory Access (DMA) from the frame grabber to present uncompressed data to the network. Fully functional prototypes have provided the proof of concept, with full deployment in the institution planned as the next stage. PMID:7949964

The Los Alamos Seismic Network (LASN): Improved Network Instrumentation, Local Earthquake Catalog Updates, and Peculiar Types of Data

NASA Astrophysics Data System (ADS)

Roberts, P. M.; Ten Cate, J. A.; House, L. S.; Greene, M. K.; Morton, E.; Kelley, R. E.

2013-12-01

The Los Alamos Seismic Network (LASN) has operated for 41 years, and provided the data to locate more than 2,500 earthquakes in north-central New Mexico. The network was installed for seismic verification research, as well as to monitor and locate earthquakes near Los Alamos National Laboratory (LANL). LASN stations are the only monitoring stations in New Mexico north of Albuquerque. The original network once included 22 stations in northern Mew Mexico. With limited funding in the early 1980's, the network was downsized to 7 stations within an area of about 15 km (N-S) by 15 km (E-W), centered on Los Alamos. Over the last four years, eight additional stations have been installed, which have considerably expanded the spatial coverage of the network. Currently, 7 stations have broadband, three-component seismometers with digital telemetry, and the remaining 8 have traditional 1 Hz short-period seismometers with either analog telemetry or on-site digital recording. A vertical array of accelerometers was also installed in a wellbore on LANL property. This borehole array has 3-component digital strong-motion sensors. Recently we began upgrading the local strong-motion accelerometer (SMA) network as well, with the addition of high-resolution digitizers and high-sensitivity force-balance accelerometers (FBA). We will present an updated description of the current LASN station, instrumentation and telemetry configurations, as well as the data acquisition and event-detection software structure used to record events in Earthworm. Although more than 2,000 earthquakes were detected and located in north-central New Mexico during the first 11 years of LASN's operation (1973 to 1984), currently only 1-2 earthquakes per month are detected and located within about 150 km of Los Alamos. Over 850 of these nearby earthquakes have been located from 1973 to present. We recently updated the LASN earthquake catalog for north-central New Mexico up through 2012 and most of 2013. Locations for these earthquakes are based on new, consistently picked arrival times, updated station locations, and the best available velocity model. Most have magnitudes less than 1.5 and are not contained in the catalogs of any other network. With 3 of the new broadband stations in and around the nearby Valles Caldera, LASN is now able to monitor even very small volcano-seismic events that may be associated with the caldera. The expanded station coverage and instrument sensitivity has also allowed detection of smaller, more distant events and new types of peculiar, non-earthquake signals we had not previously seen (e.g., train noise). These unusual signals have complicated our event discrimination efforts. We will show an updated map of north-central New Mexico seismicity based on these recent efforts, as well as examples of some the new types of data LASN is now picking up. Although the network and data are generally not accessible to the public, requests for data can be granted on a case-by-case basis.

Optical Mass Displacement Tracking: A simplified field calibration method for the electro-mechanical seismometer.

NASA Astrophysics Data System (ADS)

Burk, D. R.; Mackey, K. G.; Hartse, H. E.

2016-12-01

We have developed a simplified field calibration method for use in seismic networks that still employ the classical electro-mechanical seismometer. Smaller networks may not always have the financial capability to purchase and operate modern, state of the art equipment. Therefore these networks generally operate a modern, low-cost digitizer that is paired to an existing electro-mechanical seismometer. These systems are typically poorly calibrated. Calibration of the station is difficult to estimate because coil loading, digitizer input impedance, and amplifier gain differences vary by station and digitizer model. Therefore, it is necessary to calibrate the station channel as a complete system to take into account all components from instrument, to amplifier, to even the digitizer. Routine calibrations at the smaller networks are not always consistent, because existing calibration techniques require either specialized equipment or significant technical expertise. To improve station data quality at the small network, we developed a calibration method that utilizes open source software and a commonly available laser position sensor. Using a signal generator and a small excitation coil, we force the mass of the instrument to oscillate at various frequencies across its operating range. We then compare the channel voltage output to the laser-measured mass displacement to determine the instrument voltage sensitivity at each frequency point. Using the standard equations of forced motion, a representation of the calibration curve as a function of voltage per unit of ground velocity is calculated. A computer algorithm optimizes the curve and then translates the instrument response into a Seismic Analysis Code (SAC) poles & zeros format. Results have been demonstrated to fall within a few percent of a standard laboratory calibration. This method is an effective and affordable option for networks that employ electro-mechanical seismometers, and it is currently being deployed in regional networks throughout Russia and in Central Asia.

Index of stations; surface-water data-collections network of Texas, September 1993

USGS Publications Warehouse

Gandara, S.C.; Jones, R.E.

1995-01-01

Table 1 shows the station number and name, latitude and longitude, type of station, and the office principally responsible for collection of the data. An 8-digit permanent numerical designation for all gaging stations has been adopted on a nationwide basis; stations are numbered and listed in downstream order. In the downstream direction along the main stem, all stations on a tributary entering between two main-stem stations are listed between them. A similar order is followed in listing stations by first rank, second rank, and other ranks of tributaries. The rank of any tributary with respect to the stream to which it is an immediate tributary is indicated by an indention in the table. Each indention represents one rank. This downstream order and system of indention shows which gaging stations are on tributaries between any two stations on a main stem and the rank of the tributary on which each gaging station is situated.

Index of stations: surface-water data-collection network of Texas, September 1995

USGS Publications Warehouse

Gandara, S.C.; Jones, R.E.

1996-01-01

Table 1 shows the station number and name, latitude and longitude, type of station, and the office responsible for the collection of the data and the record. An 8-digit permanent numerical designation for all gaging stations has been adopted on a nationwide basis; stations are numbered and listed in downstream order. In the downstream direction along the main stem, all stations on a tributary entering between two main-stem stations are listed between them. A similar order is followed in listing stations by first rank, second rank, and other ranks of tributaries. The rank of any tributary with respect to the stream to which it is an immediate tributary is indicated by an indention in the table. Each indention represents one rank. This downstream order and system of indention shows which gaging stations are on tributaries between any two stations on a main stem and the rank of the tributary on which each gaging station is situated.

Space-Based Reconfigurable Software Defined Radio Test Bed Aboard International Space Station

NASA Technical Reports Server (NTRS)

Reinhart, Richard C.; Lux, James P.

2014-01-01

The National Aeronautical and Space Administration (NASA) recently launched a new software defined radio research test bed to the International Space Station. The test bed, sponsored by the Space Communications and Navigation (SCaN) Office within NASA is referred to as the SCaN Testbed. The SCaN Testbed is a highly capable communications system, composed of three software defined radios, integrated into a flight system, and mounted to the truss of the International Space Station. Software defined radios offer the future promise of in-flight reconfigurability, autonomy, and eventually cognitive operation. The adoption of software defined radios offers space missions a new way to develop and operate space transceivers for communications and navigation. Reconfigurable or software defined radios with communications and navigation functions implemented in software or VHDL (Very High Speed Hardware Description Language) provide the capability to change the functionality of the radio during development or after launch. The ability to change the operating characteristics of a radio through software once deployed to space offers the flexibility to adapt to new science opportunities, recover from anomalies within the science payload or communication system, and potentially reduce development cost and risk by adapting generic space platforms to meet specific mission requirements. The software defined radios on the SCaN Testbed are each compliant to NASA's Space Telecommunications Radio System (STRS) Architecture. The STRS Architecture is an open, non-proprietary architecture that defines interfaces for the connections between radio components. It provides an operating environment to abstract the communication waveform application from the underlying platform specific hardware such as digital-to-analog converters, analog-to-digital converters, oscillators, RF attenuators, automatic gain control circuits, FPGAs, general-purpose processors, etc. and the interconnections among different radio components.

The 727 approach energy management system avionics specification (preliminary)

NASA Technical Reports Server (NTRS)

Jackson, D. O.; Lambregts, A. A.

1976-01-01

Hardware and software requirements for an Approach Energy Management System (AEMS) consisting of an airborne digital computer and cockpit displays are presented. The displays provide the pilot with a visual indication of when to manually operate the gear, flaps, and throttles during a delayed flap approach so as to reduce approach time, fuel consumption, and community noise. The AEMS is an independent system that does not interact with other navigation or control systems, and is compatible with manually flown or autopilot coupled approaches. Operational use of the AEMS requires a DME ground station colocated with the flight path reference.

Method of locating underground mines fires

DOEpatents

Laage, Linneas; Pomroy, William

1992-01-01

An improved method of locating an underground mine fire by comparing the pattern of measured combustion product arrival times at detector locations with a real time computer-generated array of simulated patterns. A number of electronic fire detection devices are linked thru telemetry to a control station on the surface. The mine's ventilation is modeled on a digital computer using network analysis software. The time reguired to locate a fire consists of the time required to model the mines' ventilation, generate the arrival time array, scan the array, and to match measured arrival time patterns to the simulated patterns.

Development and implementation of ultrasound picture archiving and communication system

NASA Astrophysics Data System (ADS)

Weinberg, Wolfram S.; Tessler, Franklin N.; Grant, Edward G.; Kangarloo, Hooshang; Huang, H. K.

1990-08-01

The Department of Radiological Sciences at the UCLA School of Medicine is developing an archiving and communication system (PACS) for digitized ultrasound images. In its final stage the system will involve the acquisition and archiving of ultrasound studies from four different locations including the Center for Health Sciences, the Department for Mental Health and the Outpatient Radiology and Endoscopy Departments with a total of 200-250 patient studies per week. The concept comprises two stages of image manipulation for each ultrasound work area. The first station is located close to the examination site and accomodates the acquisition of digital images from up to five ultrasound devices and provides for instantaneous display and primary viewing and image selection. Completed patient studies are transferred to a main workstation for secondary review, further analysis and comparison studies. The review station has an on-line storage capacity of 10,000 images with a resolution of 512x512 8 bit data to allow for immediate retrieval of active patient studies of up to two weeks. The main work stations are connected through the general network and use one central archive for long term storage and a film printer for hardcopy output. First phase development efforts concentrate on the implementation and testing of a system at one location consisting of a number of ultrasound units with video digitizer and network interfaces and a microcomputer workstation as host for the display station with two color monitors, each allowing simultaneous display of four 512x512 images. The discussion emphasizes functionality, performance and acceptance of the system in the clinical environment.

Can You Hear Us Now? Investigating the Effects of a Wireless Grid Social Radio Station on Collaboration and Communication in Fragile Populations

ERIC Educational Resources Information Center

Chauncey, Sarah A.

2012-01-01

The ability to interact with peers and coworkers in online digital networks is essential in learning and business environments. Our digital participatory culture is based on communication in response to purposeful activity and is facilitated by information and communication technologies (ICT). Students with emotional, behavioral, and learning…

Going Digital - The Transition from Mark IV to DBBC at Onsala

NASA Astrophysics Data System (ADS)

Kareinen, Niko; Haas, Rüdiger; La Porta, Laura; Bertarini, Alessandra

2014-12-01

The Onsala Space Observatory is currently equipped with both a VLBI Mark IV rack and a digital BBC (DBBC). The Mark IV rack at Onsala has been used operationally for both astronomical and geodetic VLBI for more than 40 years. In 2011, Onsala purchased a DBBC and we started to test it and to gain experience with the new device, both for astronomical and geodetic VLBI. The DBBC was upgraded several times and the Field System (FS) interface was implemented. We did parallel recordings, with both the old Mark IV/Mark 5A system and the new DBBC/Mark 5B+ system, during numerous geodetic VLBI sessions. Several R1, T2, and Euro sessions were correlated during the last two years by the Bonn correlator with Onsala being included both as an analog station (two-letter code On) and as a digital station (two-letter code Od). We present results from these parallel sessions, both results from the original correlation and results from the analysis of the corresponding databases.

Cost-effective bidirectional digitized radio-over-fiber systems employing sigma delta modulation

NASA Astrophysics Data System (ADS)

Lee, Kyung Woon; Jung, HyunDo; Park, Jung Ho

2016-11-01

We propose a cost effective digitized radio-over-fiber (D-RoF) system employing a sigma delta modulation (SDM) and a bidirectional transmission technique using phase modulated downlink and intensity modulated uplink. SDM is transparent to different radio access technologies and modulation formats, and more suitable for a downlink of wireless system because a digital to analog converter (DAC) can be avoided at the base station (BS). Also, Central station and BS share the same light source by using a phase modulation for the downlink and an intensity modulation for the uplink transmission. Avoiding DACs and light sources have advantages in terms of cost reduction, power consumption, and compatibility with conventional wireless network structure. We have designed a cost effective bidirectional D-RoF system using a low pass SDM and measured the downlink and uplink transmission performance in terms of error vector magnitude, signal spectra, and constellations, which are based on the 10MHz LTE 64-QAM standard.

High speed imager test station

DOEpatents

Yates, George J.; Albright, Kevin L.; Turko, Bojan T.

1995-01-01

A test station enables the performance of a solid state imager (herein called a focal plane array or FPA) to be determined at high image frame rates. A programmable waveform generator is adapted to generate clock pulses at determinable rates for clock light-induced charges from a FPA. The FPA is mounted on an imager header board for placing the imager in operable proximity to level shifters for receiving the clock pulses and outputting pulses effective to clock charge from the pixels forming the FPA. Each of the clock level shifters is driven by leading and trailing edge portions of the clock pulses to reduce power dissipation in the FPA. Analog circuits receive output charge pulses clocked from the FPA pixels. The analog circuits condition the charge pulses to cancel noise in the pulses and to determine and hold a peak value of the charge for digitizing. A high speed digitizer receives the peak signal value and outputs a digital representation of each one of the charge pulses. A video system then displays an image associated with the digital representation of the output charge pulses clocked from the FPA. In one embodiment, the FPA image is formatted to a standard video format for display on conventional video equipment.

High speed imager test station

DOEpatents

Yates, G.J.; Albright, K.L.; Turko, B.T.

1995-11-14

A test station enables the performance of a solid state imager (herein called a focal plane array or FPA) to be determined at high image frame rates. A programmable waveform generator is adapted to generate clock pulses at determinable rates for clock light-induced charges from a FPA. The FPA is mounted on an imager header board for placing the imager in operable proximity to level shifters for receiving the clock pulses and outputting pulses effective to clock charge from the pixels forming the FPA. Each of the clock level shifters is driven by leading and trailing edge portions of the clock pulses to reduce power dissipation in the FPA. Analog circuits receive output charge pulses clocked from the FPA pixels. The analog circuits condition the charge pulses to cancel noise in the pulses and to determine and hold a peak value of the charge for digitizing. A high speed digitizer receives the peak signal value and outputs a digital representation of each one of the charge pulses. A video system then displays an image associated with the digital representation of the output charge pulses clocked from the FPA. In one embodiment, the FPA image is formatted to a standard video format for display on conventional video equipment. 12 figs.

Software for the First Station of the Long Wavelength Array

NASA Astrophysics Data System (ADS)

Dowell, J.; LWA Collaboration

2014-05-01

The first station of the Long Wavelength Array, LWA1, is currently operating at frequencies between 10 and 88 MHz in the Southwest United States. LWA1 consists of 256 cross-polarization dipole pairs spread over a 100 m aperture with five total-power outriggers up to ˜500 m from the center of the station. The raw voltages from the antennas are digitized and digitally combined to form four independent dual polarization beams, each with two tunings with up to 19.6 MHz of bandwidth. The telescope is designed to be a general-purpose instrument and supports a wide variety of science projects from the ionosphere to the cosmic dark ages. I will present the software behind this telescope and discuss the challenges associated with calibrating and maintaining an array of 261 dipoles. I will also discuss some of the challenges of handling the large data volume that LWA1 produces and how the LWA User Computing Facility helps address those problems.

PLT Polansky looks through hatch at U.S. Laboratory / Destiny module

NASA Image and Video Library

2001-02-11

STS98-E-5115 (11 February 2001) --- This medium shot, photographed with a digital still camera, shows STS-98 pilot Mark L. Polansky looking through the observation port on Unity's closed hatch to the newly attached Destiny laboratory. The crews of Atlantis and the International Space Station opened the laboratory shortly after this photo was made on Feb. 11; and the astronauts and cosmonauts spent the first full day of what are planned to be years of work ahead inside the orbiting science and command center. Station commander William M. (Bill) Shepherd opened the Destiny hatch, and he and shuttle commander Kenneth D. Cockrell ventured inside at 8:38 a.m. (CST), Feb. 11. As depicted in subsequent digital images in this series, members of both crews went to work quickly inside the new module, activating air systems, fire extinguishers, alarm systems, computers and internal communications. The crew also continued equipment transfers from the shuttle to the station.

A fast topographic characterization of seismic station locations in Iran through integrated use of digital elevation models and GIS

NASA Astrophysics Data System (ADS)

Karimzadeh, Sadra; Miyajima, Masakatsu; Kamel, Batoul; Pessina, Vera

2015-10-01

We present topographic slope positions of seismic stations within four independent networks (IGUT, IIEES, GSI, and BHRC) in Iran through integrated use of digital elevation models and GIS. Since topographic amplification factor (TAF) due to ground surface irregularity could be one of the reasons of earthquake wave amplification and unexpected damage of structures located on the top of ridges in many previous studies, the ridge stations in the study area are recognized using topographic position index (TPI) as a spatial-based scale-dependent approach that helps in classification of topographic positions. We also present the correlation between local topographic positions and V {/s 30} along with Voronoi tiles of two networks (IGUT and IIEES). The obtained results can be profitably used in seismology to establish homogeneous subnetworks based on Voronoi tiles with precise feedback and in the formulation of new ground motion prediction equations with respect to topographic position and topographic amplification factor.

Metsahovi Radio Observatory - IVS Network Station

NASA Technical Reports Server (NTRS)

Uunila, Minttu; Zubko, Nataliya; Poutanen, Markku; Kallunki, Juha; Kallio, Ulla

2013-01-01

In 2012, Metsahovi Radio Observatory together with Finnish Geodetic Institute officially became an IVS Network Station. Eight IVS sessions were observed during the year. Two spacecraft tracking and one EVN X-band experiment were also performed. In 2012, the Metsahovi VLBI equipment was upgraded with a Digital Base Band Converter, a Mark 5B+, a FILA10G, and a FlexBuff.

Usachev in Service Module with Russian food cans

NASA Image and Video Library

2001-07-16

STS104-E-5126 (16 July 2001) --- Cosmonaut Yury V. Usachev, Expedition Two commander, appears surrounded by food in the Zvezda service module aboard the International Space Station (ISS). Representing Rosaviakosmos, Usachev, commander, along with two astronauts, are hosting the STS-104 crew of astronauts on the International Space Station (ISS). The image was recorded with a digital still camera.

PromISS 4 hardware set up in the MSG during Expedition 12

NASA Image and Video Library

2006-01-18

ISS012-E-16162 (18 Jan. 2006) --- Astronaut William S. (Bill) McArthur, Expedition 12 commander and NASA space station science officer, configures the Microgravity Science Glovebox (MSG) facility to prepare for the installation and activation of the Protein Crystal Growth Monitoring by Digital Holographic Microscope (PromISS) experiment in the Destiny laboratory on the International Space Station.

PromISS 4 hardware set up in the MSG during Expedition 12

NASA Image and Video Library

2006-01-19

ISS012-E-16237 (19 Jan. 2006) --- Astronaut William S. (Bill) McArthur, Expedition 12 commander and NASA space station science officer, configures the Microgravity Science Glovebox (MSG) facility to prepare for the installation and activation of the Protein Crystal Growth Monitoring by Digital Holographic Microscope (PromISS) experiment in the Destiny laboratory on the International Space Station.

PromISS 4 hardware set up in the MSG during Expedition 12

NASA Image and Video Library

2006-01-19

ISS012-E-16245 (19 Jan. 2006) --- Astronaut William S. (Bill) McArthur, Expedition 12 commander and NASA space station science officer, configures the Microgravity Science Glovebox (MSG) facility to prepare for the installation and activation of the Protein Crystal Growth Monitoring by Digital Holographic Microscope (PromISS) experiment in the Destiny laboratory on the International Space Station.

75 FR 35813 - Notice of Public Information Collection Being Reviewed by the Federal Communications Commission...

Federal Register 2010, 2011, 2012, 2013, 2014

2010-06-23

... Number: 3060-0844. Title: Carriage of the Transmission of Digital Television Broadcast Stations, R&O, and... FCC adopted a Report and Order (R&O) on January 23, 2001 and Further Notice of Proposed Rulemaking (FNPRM). The R&O modified 47 CFR 76.64(f) to provide that stations that return their analog spectrum and...

Assessing the impact of PACS on patient care in a medical intensive care unit

NASA Astrophysics Data System (ADS)

Shile, Peter E.; Kundel, Harold L.; Seshadri, Sridhar B.; Carey, Bruce; Brikman, Inna; Kishore, Sheel; Feingold, Eric R.; Lanken, Paul N.

1993-09-01

In this paper we have present data from pilot studies to estimate the impact on patient care of an intensive care unit display station. The data were collected during two separate one-month periods in 1992. We compared these two different periods in terms of the relative speeds with which images were first viewed by MICU physicians. First, we found that images for routine chest radiographs (CXRs) are viewed by a greater number of physicians and slightly sooner with the PACS display station operating in the MICU than when it is not. Thus, for routine exams, PACS provide the potential for shortening of time intervals between exam completions and image-based clinical actions. A second finding is that the use of the display station for viewing non-routine CXRs is strongly influenced by the speed with which films are digitized. Hence, if film digitization is not rapid, the presence of a MICU display station is unlikely to contribute to a shortening of time intervals between exam completions and image-based clinical actions. This finding supports the use of computed radiography for CXRs in an intensive care unit.

Space Station Biological Research Project Habitat: Incubator

NASA Technical Reports Server (NTRS)

Nakamura, G. J.; Kirven-Brooks, M.; Scheller, N. M.

2001-01-01

Developed as part of the suite of Space Station Biological Research Project (SSBRP) hardware to support research aboard the International Space Station (ISS), the Incubator is a temperature-controlled chamber, for conducting life science research with small animal, plant and microbial specimens. The Incubator is designed for use only on the ISS and is transported to/from the ISS, unpowered and without specimens, in the Multi-Purpose Logistics Module (MPLM) of the Shuttle. The Incubator interfaces with the three SSBRP Host Systems; the Habitat Holding Racks (HHR), the Life Sciences Glovebox (LSG) and the 2.5 m Centrifuge Rotor (CR), providing investigators with the ability to conduct research in microgravity and at variable gravity levels of up to 2-g. The temperature within the Specimen Chamber can be controlled between 4 and 45 C. Cabin air is recirculated within the Specimen Chamber and can be exchanged with the ISS cabin at a rate of approximately equal 50 cc/min. The humidity of the Specimen Chamber is monitored. The Specimen Chamber has a usable volume of approximately equal 19 liters and contains two (2) connectors at 28v dc, (60W) for science equipment; 5 dedicated thermometers for science; ports to support analog and digital signals from experiment unique sensors or other equipment; an Ethernet port; and a video port. It is currently manifested for UF-3 and will be launched integrated within the first SSBRP Habitat Holding Rack.

Distributed Digital Survey Logbook Built on GeoServer and PostGIS

NASA Astrophysics Data System (ADS)

Jovicic, Aleksandar; Castelli, Ana; Kljajic, Zoran

2013-04-01

Keeping tracks of events that happens during survey (e.g. position and time when instruments goes into the water or come on-board, depths from which samples are taken or notes about equipment malfunctions and repairs) is essential for efficient post-processing and quality control of collected data especially in case of suspicious measurements. Most scientists still using good-old-paper way for such tasks and later transform it into digital form using spreadsheet applications. This approach looks more "safe" (if person is not confident in their computer skills) but in reality it turns to be more error-prone (especially when it comes to position recording and variations of sexagesimal representations or if there are no hints which timezone was used for time recording). As cruises usually involves various teams not always interested to do own measurements at each station, keeping eye on current position is essential, especially if cruise plan is changed (due to bad weather or discovering of some underwater features that requires more attention than originally planned). Also, position is usually displayed only at one monitor (as most GPS receivers provide just serial connectivity and distribution of such signal to multiple clients requires some devices non-wide-spread on computer equipment market) so it can make messy situation in control room when everybody try to write-down current position and time. To overcome all mentioned obstacles Distributed Digital Surevey Logbook is implemented. It is built on Open Geospatial Consortium (OGC) compliant GeoServer, using PostGIS database. It can handle geospatial content (charts and cruise plans), do recording of vessel track and all kind of events that any member of team want to record. As GeoServer allows distribution of position data to unlimited number of clients (from traditional PC's and laptops to tablets and smartphones), it can decrease pressure on control room no matter if all features are used or just as distant display of ship position. If vessel is equipped with Internet link, real-time situation can be distributed to expert on land, who can monitor progress and advise chief-scientist how to overcome issues. Each scientist can setup own pre-defined events, and trigger it by one click, or use free-text button and write-down note. Timestamp of event is recorded and in case that triggering was delayed (e.g. person was occupied with equipment preparation), time-delay modifier is available. Position of event is marked based on recorded timestamp, so all events that happens at single station can be shown on chart. Events can be filtered by contributor, so each team can get view of own stations only. ETA at next station and planned activities there are also shown, so crew can better estimate moment when need to start preparing equipment. Presented solution shows benefits that free software (e.g. GeoServer, PostGIS, OpenLayers, Geotools) produced according to OGC standards, brings to oceanographic community especially in decreasing of development time and providing multi-platform access. Applicability of such solutions is not limited only to on-board operations but can be easily extended to any task involving geospatial data.

36 CFR 1192.87 - Public information system.

Code of Federal Regulations, 2011 CFR

2011-07-01

... COMPLIANCE BOARD AMERICANS WITH DISABILITIES ACT (ADA) ACCESSIBILITY GUIDELINES FOR TRANSPORTATION VEHICLES... digitized human speech messages, to announce stations and provide other passenger information. Alternative...

Aerospace Applications Conference, Steamboat Springs, CO, Feb. 1-8, 1986, Digest

NASA Astrophysics Data System (ADS)

The present conference considers topics concerning the projected NASA Space Station's systems, digital signal and data processing applications, and space science and microwave applications. Attention is given to Space Station video and audio subsystems design, clock error, jitter, phase error and differential time-of-arrival in satellite communications, automation and robotics in space applications, target insertion into synthetic background scenes, and a novel scheme for the computation of the discrete Fourier transform on a systolic processor. Also discussed are a novel signal parameter measurement system employing digital signal processing, EEPROMS for spacecraft applications, a unique concurrent processor architecture for high speed simulation of dynamic systems, a dual polarization flat plate antenna, Fresnel diffraction, and ultralinear TWTs for high efficiency satellite communications.

Field-Deployable Acoustic Digital Systems for Noise Measurement

NASA Technical Reports Server (NTRS)

Shams, Qamar A.; Wright, Kenneth D.; Lunsford, Charles B.; Smith, Charlie D.

2000-01-01

Langley Research Center (LaRC) has for years been a leader in field acoustic array measurement technique. Two field-deployable digital measurement systems have been developed to support acoustic research programs at LaRC. For several years, LaRC has used the Digital Acoustic Measurement System (DAMS) for measuring the acoustic noise levels from rotorcraft and tiltrotor aircraft. Recently, a second system called Remote Acquisition and Storage System (RASS) was developed and deployed for the first time in the field along with DAMS system for the Community Noise Flight Test using the NASA LaRC-757 aircraft during April, 2000. The test was performed at Airborne Airport in Wilmington, OH to validate predicted noise reduction benefits from alternative operational procedures. The test matrix was composed of various combinations of altitude, cutback power, and aircraft weight. The DAMS digitizes the acoustic inputs at the microphone site and can be located up to 2000 feet from the van which houses the acquisition, storage and analysis equipment. Digitized data from up to 10 microphones is recorded on a Jaz disk and is analyzed post-test by microcomputer system. The RASS digitizes and stores acoustic inputs at the microphone site that can be located up to three miles from the base station and can compose a 3 mile by 3 mile array of microphones. 16-bit digitized data from the microphones is stored on removable Jaz disk and is transferred through a high speed array to a very large high speed permanent storage device. Up to 30 microphones can be utilized in the array. System control and monitoring is accomplished via Radio Frequency (RF) link. This paper will present a detailed description of both systems, along with acoustic data analysis from both systems.

Payload Bay of Endeavour

NASA Image and Video Library

2008-11-26

S126-E-11974 (26 Nov. 2008) --- Backdropped against white clouds, the aft section of Endeavour's cargo bay, now holding the multipurpose logistics module Leonardo, is featured in this digital still photo, framed through a window on the International Space Station. Endeavour and the orbital outpost have been docked for almost two weeks while their crews have joined efforts in home improvement on the station and other work. Astronauts Donald Pettit and Shane Kimbrough, operating the space station's robot arm from inside the Destiny laboratory module, detached the Leonardo cargo canister from its temporary parking place on the station a few hours earlier and re-berthed it in the cargo bay.

A digitally implemented phase-locked loop detection scheme for analysis of the phase and power stability of a calibration tone

NASA Technical Reports Server (NTRS)

Densmore, A. C.

1988-01-01

A digital phase-locked loop (PLL) scheme is described which detects the phase and power of a high SNR calibration tone. The digital PLL is implemented in software directly from the given description. It was used to evaluate the stability of the Goldstone Deep Space Station open loop receivers for Radio Science. Included is a derivative of the Allan variance sensitivity of the PLL imposed by additive white Gaussian noise; a lower limit is placed on the carrier frequency.

Upgrades and Modifications of the NASA Ames HFFAF Ballistic Range

NASA Technical Reports Server (NTRS)

Bogdanoff, David W.; Wilder, Michael C.; Cornelison, Charles J.; Perez, Alfredo J.

2017-01-01

The NASA Ames Hypervelocity Free Flight Aerodynamics Facility ballistic range is described. The various configurations of the shadowgraph stations are presented. This includes the original stations with film and configurations with two different types of digital cameras. Resolution tests for the 3 shadowgraph station configurations are described. The advantages of the digital cameras are discussed, including the immediate availability of the shadowgraphs. The final shadowgraph station configuration is a mix of 26 Nikon cameras and 6 PI-MAX2 cameras. Two types of trigger light sheet stations are described visible and IR. The two gunpowders used for the NASA Ames 6.251.50 light gas guns are presented. These are the Hercules HC-33-FS powder (no longer available) and the St. Marks Powder WC 886 powder. The results from eight proof shots for the two powders are presented. Both muzzle velocities and piston velocities are 5 9 lower for the new St. Marks WC 886 powder than for the old Hercules HC-33-FS powder (no longer available). The experimental and CFD (computational) piston and muzzle velocities are in good agreement. Shadowgraph-reading software that employs template-matching pattern recognition to locate the ballistic-range model is described. Templates are generated from a 3D solid model of the ballistic-range model. The accuracy of the approach is assessed using a set of computer-generated test images.

A study of universal modulation techniques applied to satellite data collection

NASA Technical Reports Server (NTRS)

1980-01-01

A universal modulation and frequency control system for use with data collection platform (DCP) transmitters is examined. The final design discussed can, under software/firmwave control, generate all of the specific digital data modulation formats currently used in the NASA satellite data collection service and can simultaneously synthesize the proper RF carrier frequencies employed. A novel technique for DCP time and frequency control is presented. The emissions of NBS radio station WWV/WWVH are received, detected, and finally decoded in microcomputer software to generate a highly accurate time base for the platform; with the assistance of external hardware, the microcomputer also directs the recalibration of all DCP oscillators to achieve very high frequency accuracies and low drift rates versus temperature, supply voltage, and time. The final programmable DCP design also employs direct microcomputer control of data reduction, formatting, transmitter switching, and system power management.

STS-98 and Expedition One crew with rack in U.S. Laboratory / Destiny module

NASA Image and Video Library

2001-02-11

STS98-E-5159 (11 February 2001) --- Astronaut Mark L. Polansky, STS-98 pilot, works inside the newly attached Destiny laboratory onboard the International Space Station (ISS). After the Destiny hatch was opened early in the day, members of both the shuttle and station crews went to work quickly inside the new module, activating air systems, fire extinguishers, alarm systems, computers and internal communications. The crews also took some photos and continued equipment transfers from the shuttle to the station. The scene was taken with a digital still camera.

View of the ISS taken during final flyaround of STS-100

NASA Image and Video Library

2001-04-29

S100-E-5960 (29 April 2001) --- Backdropped against the blue and white Earth and sporting a readily visible new addition in the form of the Canadarm2 or space station robotic arm, the International Space Station (ISS) was photographed following separation from the Space Shuttle Endeavour. With six astronauts and a Rosaviakosmos cosmonaut aboard the shuttle, the spacecraft performed a fly-around survey of the station, which was inhabited by two astronauts and a Russian cosmonaut. The image was recorded with a digital still camera.

View of the ISS taken during final flyaround of STS-100

NASA Image and Video Library

2001-04-29

S100-E-5973 (29 April 2001) --- Backdropped against the blackness of space and sporting a readily visible new addition in the form of the Canadarm2 or space station robotic arm, the International Space Station (ISS) was photographed following separation from the Space Shuttle Endeavour. With six astronauts and a Rosaviakosmos cosmonaut aboard the shuttle, the spacecraft performed a fly-around survey of the station, which was inhabited by two astronauts and a Russian cosmonaut. The image was recorded with a digital still camera.

Principal Facts for Gravity Data Collected in Wisconsin: A Web Site and CD-ROM for Distribution of Data

USGS Publications Warehouse

Snyder, Stephen L.; Geister, Daniel W.; Daniels, David L.; Ervin, C. Patrick

2004-01-01

Principal facts for 40,488 gravity stations covering the entire state of Wisconsin are presented here in digital form. This is a compilation of previously published data collected between 1948 and 1992 from numerous sources, along with over 10,000 new gravity stations collected by the USGS since 1999. Also included are 550 gravity stations from previously unpublished sources. Observed gravity and complete-Bouguer gravity anomaly data for this statewide compilation are included here. Altogether, 14 individual surveys are presented here.

STS-98 crewmembers prepare for rendezvous and docking with ISS

NASA Image and Video Library

2001-02-09

STS98-E-5030 (9 February 2001) --- Three members of the STS-98 crew prepare for rendezvous with the International Space Station (ISS). Astronaut Thomas D. Jones (right), mission specialist, temporarily mans the pilot's station on the flight deck of the Space Shuttle Atlantis. Astronaut Mark L. Polansky, left, sits at the commander's station for this maneuver. At lower left is Astronaut Robert L. Curbeam, mission specialist. Astronaut Kenneth D. Cockrell, mission commander, is just out of frame at right. The photograph was recorded with a digital still camera.

JPRS Report Telecommunications

DTIC Science & Technology

1988-02-18

Service, 2000 GMT 15 Jan 88] 1 GUINEA Telegraph, Telex To Link Conakry, Freetown [Conakry Domestic Service, 14 Dec 87] 1 NIGERIA NITEL Digital ...Radio-Monitoring Capability Turns Up Illegal Band Use [St Johns THE WORKERS VOICE, 5 Dec 87] 12 BAHAMAS Telephone Digital , Fibre Optic Projects Under...87] 15 PERU 5 Radio Stations Closed in Tarapoto, Moyobamba [Lima EL COMERCIO , 4 Dec 87] 16 TRINIDAD AND TOBAGO Government Studies, Weighs

Long-Period Seismological Research Program

DTIC Science & Technology

1976-06-30

previously gain seismograph stations at Charters Towers, Australia Alaska (FbK), Eilat, Israel (EIL), Chiang Mai , Thailand burg. New Jersey (OGD...digital systems have been operational. On 26 December 1971, the digital technician from Townsville, Australia, was sent to Chiang Mai , Thailand, to work...combined inspection-maintenance trips to ions at Charters Towers, Australia (CTA); Chiang Mai , Thailand a, Hawaii (KIP); and Matsushiro, Japan (MAT). As a

Sunlight and Solar Cells: Teaching Digital Design and Communication through the Development of a Simple Monitoring Station

ERIC Educational Resources Information Center

Downs, Nathan; Parisi, Alfio

2010-01-01

A method is described for building a cost effective digital circuit capable of monitoring the solar radiation incident upon a remote solar cell. The circuit is built in two sections, the first, digitises the analogue voltage produced by the solar cell at a remote location and transmits the received signal to the second receiver circuit which…

Climatic summaries and documentation for the primary meteorological station, H.J. Andrews Experimental Forest, 1972 To 1984.

Treesearch

Frederick A. Bierlmaler; Arthur McKee

1989-01-01

This report describes the primary meteorological station at the H.J. Andrews Experimental Forest (elev. 426 m, lat. 44°15' N., long. 122°10' W.) in the Willamette National Forest, the automatic digital data logger, sensors, and data-processing procedures used in measuring air temperature, dewpoint temperature, windspeed, precipitation, and solar radiation....

Principal facts for gravity data collected in South Dakota: a web site for distribution of data

USGS Publications Warehouse

Kucks, Robert P.; Zawislak, Ronald L.

2001-01-01

Principal facts for 12266 new gravity stations and 2880 stations previously released in paper form (Klasner and Kucks, 1988) for the state of South Dakota are presented. These data were contracted to fill a gap in existing data coverage for the state. Observed and Bouguer anomaly data for this regional compilation are available here in digital form.

75 FR 33804 - Notice of Public Information Collection Being Submitted for Review and Approval to the Office of...

Federal Register 2010, 2011, 2012, 2013, 2014

2010-06-15

....gov . To view a copy of this information collection request (ICR) submitted to OMB: (1) Go to the web page http://reginfo.gov/public/do/PRAMain , (2) look for the section of the web page called ``Currently..., digital, LPTV and TV translator stations. The CBPA directs that Class A stations must comply with the...

Active learning innovative for the study of climatic variations in Sicily (Italy) and micro-climates in confined environments. Digitized construction of agro-meteorological laboratory and entrepreneurial development of methodical home automation systems

NASA Astrophysics Data System (ADS)

Crimi, Pietro

2017-04-01

In education to issues of environmental sustainability and the use of renewable energy resources, there are the existing laboratory teaching methodologies in Superior School "A. Volta" in Palermo (Italy) for acquisition, processing and control network of agro-meteorological data on the local area. This station was planned to allow students practical multidisciplinary learning experiences in the field of agro-meteorological applications. The School started a few months ago a project of MIUR (Italian Ministry of Education) that updates the lab through the most innovative digital technologies in the field of mechatronics, domotic and sustainable energy, that are supported by the latest needs of scientific-educational multimedia. It is an educational training that intends to implement a data collection center agro-meteorological on "digital platforms," informational purposes and applications, on current issues of climate changes and their consequences in Sicily (Italy). This active learning will interconnect the data collected from the station weather and climate of the school with those locally and regionally, with "weather-climatic patterns" correlations that are implemented in the Mediterranean area (International Program "GAW-Global Atmosphere Watch"). For this reason were enabled synergies with two major public scientific research and acquisition services-data disclosure (ENEA and SIAS-Agrometeorological Information Service, Sicily Region), both to energy efficiency of the School Station, both to support data and digital applications in GIS, with agro-meteorological services to companies operating in the agricultural and environmental sustainability, high consideration themes in European Programming. A branch of this training course is the entrepreneurship education, carried out by a few years in School with the development of "experimental models" for the creation of "innovation clusters" to make entrepreneurial experience since school, creating/managing mini-companies. In the European educational program (Erasmus + KA3) called "Innovation Cluster for Entrepreneurship Education (ICEE)", aimed at enhancing the students' creativity and entrepreneurship, one of the mini-companies, created by students at the Institute, has developed and produced with innovative software a prototype automated system, a mini-greenhouse powered by solar energy, capable of recreating the habitat suitable for house plants, through the automated control of numerous agricultural micro-climatic parameters. Creating multimedia systems such as web platforms, advanced software and app/QR-code for mobile devices, defines the most innovative tools in computer science outreach phases. This experimental approach incorporates the teaching methods that are defined by the curriculum of the "Liceo delle Scienze Applicate" that exists in the School, with the proposition of experimental models that besides being "learning models" can switch into "knowledge models" correlated with scientific and technical-scientific models that exist in the world of research. La Natura non distrugge, che per creare, e non crea, che per distruggere (Storia dell'Astronomia, 1813 - Giacomo Leopardi)

Information management system breadboard data acquisition and control system.

NASA Technical Reports Server (NTRS)

Mallary, W. E.

1972-01-01

Description of a breadboard configuration of an advanced information management system based on requirements for high data rates and local and centralized computation for subsystems and experiments to be housed on a space station. The system is to contain a 10-megabit-per-second digital data bus, remote terminals with preprocessor capabilities, and a central multiprocessor. A concept definition is presented for the data acquisition and control system breadboard, and a detailed account is given of the operation of the bus control unit, the bus itself, and the remote acquisition and control unit. The data bus control unit is capable of operating under control of both its own test panel and the test processor. In either mode it is capable of both single- and multiple-message operation in that it can accept a block of data requests or update commands for transmission to the remote acquisition and control unit, which in turn is capable of three levels of data-handling complexity.

Rapid mapping of landslide disaster using UAV- photogrammetry

NASA Astrophysics Data System (ADS)

Cahyono, A. B.; Zayd, R. A.

2018-03-01

Unmanned Aerial Vehicle (UAV) systems offered many advantages in several mapping applications such as slope mapping, geohazard studies, etc. This study utilizes UAV system for landslide disaster occurred in Jombang Regency, East Java. This study concentrates on type of rotor-wing UAV, that is because rotor wing units are stable and able to capture images easily. Aerial photograph were acquired in the form of strips which followed the procedure of acquiring aerial photograph where taken 60 photos. Secondary data of ground control points using GPS Geodetic and check points established using Total Station technique was used. The digital camera was calibrated using close range photogrammetric software and the recovered camera calibration parameters were then used in the processing of digital images. All the aerial photographs were processed using digital photogrammetric software and the output in the form of orthophoto was produced. The final result shows a 1: 1500 scale orthophoto map from the data processing with SfM algorithm with GSD accuracy of 3.45 cm. And the calculated volume of contour line delineation of 10527.03 m3. The result is significantly different from the result of terrestrial methode equal to 964.67 m3 or 8.4% of the difference of both.

Experience with an integrated control and monitoring system at the El Segundo generating station

DOE Office of Scientific and Technical Information (OSTI.GOV)

Papilla, R.P.; McKinley, J.H.; Blanco, M.A.

1992-01-01

This paper describes the EPRI/Southern California Edison (SCE) El Segundo Integrated Control and Monitoring System (ICMS) project and relates key project experiences. The ICMS project is a cost-shared effort between EPRI and SCE designed to address the issues involved with integrating power plant diagnostic and condition monitoring with control. A digital distributed control system retrofit for SCE's El Segundo Units 3 and 4 provided the case study. although many utilities have retrofitted power plant units with distributed control systems (DCS's) and have applied diagnostics and monitoring programs to improve operations and performance, the approach taken in this project, that is,more » integrating the monitoring function with the control function, is profoundly new and unique. Over the life of the El Segundo ICMS, SCE expects to realize savings form life optimization, increased operating flexibility, improved heat rate, reduced NO{sub x} emissions, and lower maintenance costs. These savings are expected to be significant over the life of the system.« less

Collaborative Software Development Approach Used to Deliver the New Shuttle Telemetry Ground Station

NASA Technical Reports Server (NTRS)

Kirby, Randy L.; Mann, David; Prenger, Stephen G.; Craig, Wayne; Greenwood, Andrew; Morsics, Jonathan; Fricker, Charles H.; Quach, Son; Lechese, Paul

2003-01-01

United Space Alliance (USA) developed and used a new software development method to meet technical, schedule, and budget challenges faced during the development and delivery of the new Shuttle Telemetry Ground Station at Kennedy Space Center. This method, called Collaborative Software Development, enabled KSC to effectively leverage industrial software and build additional capabilities to meet shuttle system and operational requirements. Application of this method resulted in reduced time to market, reduced development cost, improved product quality, and improved programmer competence while developing technologies of benefit to a small company in California (AP Labs Inc.). Many modifications were made to the baseline software product (VMEwindow), which improved its quality and functionality. In addition, six new software capabilities were developed, which are the subject of this article and add useful functionality to the VMEwindow environment. These new software programs are written in C or VXWorks and are used in conjunction with other ground station software packages, such as VMEwindow, Matlab, Dataviews, and PVWave. The Space Shuttle Telemetry Ground Station receives frequency-modulation (FM) and pulse-code-modulated (PCM) signals from the shuttle and support equipment. The hardware architecture (see figure) includes Sun workstations connected to multiple PCM- and FM-processing VersaModule Eurocard (VME) chassis. A reflective memory network transports raw data from PCM Processors (PCMPs) to the programmable digital-to-analog (D/A) converters, strip chart recorders, and analysis and controller workstations.

5 Ways to Find Balance in the Digital Age

Cancer.gov

The digital age can help us thrive in our everyday lives—with greater access to health information and tools that support our well-being, local and world news websites that keep us informed, and social media tools and apps that make it easier to chat with family and friends, hunt for that great new job, or even find the nearest gas station when you are running on empty.

98. View of IBM digital computer model 7090 magnet core ...

Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

98. View of IBM digital computer model 7090 magnet core installation. ITT Artic Services, Inc., Official photograph BMEWS Site II, Clear, AK, by unknown photographer, 17 September 1965. BMEWS, clear as negative no. A-6606. - Clear Air Force Station, Ballistic Missile Early Warning System Site II, One mile west of mile marker 293.5 on Parks Highway, 5 miles southwest of Anderson, Anderson, Denali Borough, AK

A battery-free multichannel digital neural/EMG telemetry system for flying insects.

PubMed

Thomas, Stewart J; Harrison, Reid R; Leonardo, Anthony; Reynolds, Matthew S

2012-10-01

This paper presents a digital neural/EMG telemetry system small enough and lightweight enough to permit recording from insects in flight. It has a measured flight package mass of only 38 mg. This system includes a single-chip telemetry integrated circuit (IC) employing RF power harvesting for battery-free operation, with communication via modulated backscatter in the UHF (902-928 MHz) band. An on-chip 11-bit ADC digitizes 10 neural channels with a sampling rate of 26.1 kSps and 4 EMG channels at 1.63 kSps, and telemeters this data wirelessly to a base station. The companion base station transceiver includes an RF transmitter of +36 dBm (4 W) output power to wirelessly power the telemetry IC, and a digital receiver with a sensitivity of -70 dBm for 10⁻⁵ BER at 5.0 Mbps to receive the data stream from the telemetry IC. The telemetry chip was fabricated in a commercial 0.35 μ m 4M1P (4 metal, 1 poly) CMOS process. The die measures 2.36 × 1.88 mm, is 250 μm thick, and is wire bonded into a flex circuit assembly measuring 4.6 × 6.8 mm.

Fault tolerant data management system

NASA Technical Reports Server (NTRS)

Gustin, W. M.; Smither, M. A.

1972-01-01

Described in detail are: (1) results obtained in modifying the onboard data management system software to a multiprocessor fault tolerant system; (2) a functional description of the prototype buffer I/O units; (3) description of modification to the ACADC and stimuli generating unit of the DTS; and (4) summaries and conclusions on techniques implemented in the rack and prototype buffers. Also documented is the work done in investigating techniques of high speed (5 Mbps) digital data transmission in the data bus environment. The application considered is a multiport data bus operating with the following constraints: no preferred stations; random bus access by all stations; all stations equally likely to source or sink data; no limit to the number of stations along the bus; no branching of the bus; and no restriction on station placement along the bus.

Real-time processing of interferograms for monitoring protein crystal growth on the Space Station

NASA Technical Reports Server (NTRS)

Choudry, A.; Dupuis, N.

1988-01-01

The possibility of using microscopic interferometric techniques to monitor the growth of protein crystals on the Space Station is studied. Digital image processing techniques are used to develop a system for the real-time analysis of microscopic interferograms of nucleation sites during protein crystal growth. Features of the optical setup and the image processing system are discussed and experimental results are presented.

[MODERN INSTRUMENTS FOR EAR, NOSE AND THROAT RENDERING AND EVALUATION IN RESEARCHES ON RUSSIAN SEGMENT OF THE INTERNATIONAL SPACE STATION].

PubMed

Popova, I I; Orlov, O I; Matsnev, E I; Revyakin, Yu G

2016-01-01

The paper reports the results of testing some diagnostic video systems enabling digital rendering of TNT teeth and jaws. The authors substantiate the criteria of choosing and integration of imaging systems in future on Russian segment of the International space station kit LOR developed for examination and download of high-quality images of cosmonauts' TNT, parodentium and teeth.

Statistical analysis of long-term monitoring data for persistent organic pollutants in the atmosphere at 20 monitoring stations broadly indicates declining concentrations.

PubMed

Kong, Deguo; MacLeod, Matthew; Hung, Hayley; Cousins, Ian T

2014-11-04

During recent decades concentrations of persistent organic pollutants (POPs) in the atmosphere have been monitored at multiple stations worldwide. We used three statistical methods to analyze a total of 748 time series of selected POPs in the atmosphere to determine if there are statistically significant reductions in levels of POPs that have had control actions enacted to restrict or eliminate manufacture, use and emissions. Significant decreasing trends were identified in 560 (75%) of the 748 time series collected from the Arctic, North America, and Europe, indicating that the atmospheric concentrations of these POPs are generally decreasing, consistent with the overall effectiveness of emission control actions. Statistically significant trends in synthetic time series could be reliably identified with the improved Mann-Kendall (iMK) test and the digital filtration (DF) technique in time series longer than 5 years. The temporal trends of new (or emerging) POPs in the atmosphere are often unclear because time series are too short. A statistical detrending method based on the iMK test was not able to identify abrupt changes in the rates of decline of atmospheric POP concentrations encoded into synthetic time series.

CEA SMAD 2016 Digitizer Evaluation.

DOE Office of Scientific and Technical Information (OSTI.GOV)

Merchant, Bion J.

Sandia National Laboratories has tested and evaluated an updated SMAD digitizer, developed by the French Alternative Energies and Atomic Energy Commission (CEA). The SMAD digitizers are intended to record sensor output for seismic and infrasound monitoring applications. The purpose of this digitizer evaluation is to measure the performance characteristics in such areas as power consumption, input impedance, sensitivity, full scale, self-noise, dynamic range, system noise, response, passband, and timing. The SMAD digitizers have been updated since their last evaluation by Sandia to improve their performance when recording at a sample rate of 20 Hz for infrasound applications and 100 Hzmore » for hydro-acoustic seismic stations. This evaluation focuses primarily on the 20 Hz and 100 Hz sample rates. The SMAD digitizers are being evaluated for potential use in the International Monitoring System (IMS) of the Comprehensive Nuclear Test- Ban-Treaty Organization (CTBTO).« less

Inversion for slip distribution using teleseismic P waveforms: North Palm Springs, Borah Peak, and Michoacan earthquakes

USGS Publications Warehouse

Mendoza, C.; Hartzell, S.H.

1988-01-01

We have inverted the teleseismic P waveforms recorded by stations of the Global Digital Seismograph Network for the 8 July 1986 North Palm Springs, California, the 28 October 1983 Borah Peak, Idaho, and the 19 September 1985 Michoacan, Mexico, earthquakes to recover the distribution of slip on each of the faults using a point-by-point inversion method with smoothing and positivity constraints. Results of the inversion indicate that the Global digital Seismograph Network data are useful for deriving fault dislocation models for moderate to large events. However, a wide range of frequencies is necessary to infer the distribution of slip on the earthquake fault. Although the long-period waveforms define the size (dimensions and seismic moment) of the earthquake, data at shorter period provide additional constraints on the variation of slip on the fault. Dislocation models obtained for all three earthquakes are consistent with a heterogeneous rupture process where failure is controlled largely by the size and location of high-strength asperity regions. -from Authors

GTEX: An expert system for diagnosing faults in satellite ground stations

NASA Technical Reports Server (NTRS)

Schlegelmilch, Richard F.; Durkin, John; Petrik, Edward J.

1991-01-01

A proof of concept expert system called Ground Terminal Expert (GTEX) was developed at The University of Akron in collaboration with NASA Lewis Research Center. The objective of GTEX is to aid in diagnosing data faults occurring with a digital ground terminal. This strategy can also be applied to the Very Small Aperture Terminal (VSAT) technology. An expert system which detects and diagnoses faults would enhance the performance of the VSAT by improving reliability and reducing maintenance time. GTEX is capable of detecting faults, isolating the cause and recommending appropriate actions. Isolation of faults is completed to board-level modules. A graphical user interface provides control and a medium where data can be requested and cryptic information logically displayed. Interaction with GTEX consists of user responses and input from data files. The use of data files provides a method of simulating dynamic interaction between the digital ground terminal and the expert system. GTEX as described is capable of both improving reliability and reducing the time required for necessary maintenance.

GTEX: An expert system for diagnosing faults in satellite ground stations

NASA Astrophysics Data System (ADS)

Schlegelmilch, Richard F.; Durkin, John; Petrik, Edward J.

1991-11-01

A proof of concept expert system called Ground Terminal Expert (GTEX) was developed at The University of Akron in collaboration with NASA Lewis Research Center. The objective of GTEX is to aid in diagnosing data faults occurring with a digital ground terminal. This strategy can also be applied to the Very Small Aperture Terminal (VSAT) technology. An expert system which detects and diagnoses faults would enhance the performance of the VSAT by improving reliability and reducing maintenance time. GTEX is capable of detecting faults, isolating the cause and recommending appropriate actions. Isolation of faults is completed to board-level modules. A graphical user interface provides control and a medium where data can be requested and cryptic information logically displayed. Interaction with GTEX consists of user responses and input from data files. The use of data files provides a method of simulating dynamic interaction between the digital ground terminal and the expert system. GTEX as described is capable of both improving reliability and reducing the time required for necessary maintenance.

Haystack Observatory Technology Development Center

NASA Technical Reports Server (NTRS)

Beaudoin, Chris; Corey, Brian; Niell, Arthur; Cappallo, Roger; Whitney, Alan

2013-01-01

Technology development at MIT Haystack Observatory were focused on four areas in 2012: VGOS developments at GGAO; Digital backend developments and workshop; RFI compatibility at VLBI stations; Mark 6 VLBI data system development.

Unravelling Responses for the Canadian National Seismic Network

NASA Astrophysics Data System (ADS)

Mulder, T. L.

2009-12-01

There are a number of attendant difficulties any network must deal with that range from defining the transfer function to instrument naming conventions to choices of final local file format representation. These choices ultimately result in the ease of conversion to other data formats and therefore directly impact useability. In particular, the ease of data exhange and use of established software that is dependent on standard data types is impacted. This becomes particularly critical with large (terabyte) dataset processing and when integrating external datasets into analysis procedures. Transfer functions, often referred to as instrument responses, are a key component in describing instrumentation. The transfer function describes the complete response of the seismic system. The seismic system is designed to be a linear system that can be decomposed into discrete components. Analogue or digital convolution can be represented as multiplication in the frequency domain. The two basic elements of a seismic system are the sensor and datalogger. The analogue sensor can be represented mathmatically as poles and zeroes. The datalogger can be further broken down into its discrete analogue and digital components: the preamp, A/D converter, and fir filters. The Canadian seismic network (CNSN) digitizers have an additional complication. To save telemetry band-width, the 32 bit signal from the digitizer has a transmission gain removed. The transmission gain (txgain) represents the number of the least significant bits truncated from the sample (2^txgain) after which the data is compressed and transmitted. While telemetry band-width is not the issue it was, now that many sites have ip connectivity, this user programmable transmission gain is still in use and can vary from station to station. The processes receiving the transmitted data do not restore the pre-transmission scaling, consequently the archived waveform files can vary in bit weight over time from station to station depending on the value of the transmission gain. Consequently the transmission gain must be factored into the transfer function. This presentation describes the process for generating the transfer function based on the constituent components discussed here. A matlab routine run on the database generates the transfer function plots for the network.

High Speed A/D DSP Interface for Carrier Doppler Tracking

NASA Technical Reports Server (NTRS)

Baggett, Timothy

1998-01-01

As on-board satellite systems continue to increase in ability to perform self diagnostic checks, it will become more important for satellites to initiate ground communications contact. Currently, the NASA Space Network requires users to pre-arranged times for satellite communications links through the Tracking and Data Relay Satellite (TDRS). One of the challenges in implementing an on-demand access protocol into the Space Network, is the fact that a low Earth orbiting (LEO) satellite's communications will be subject to a doppler shift which is outside the capability of the NASA ground station to lock onto. In a prearranged system, the satellite's doppler is known a priori, and the ground station is able to lock onto the satellite's signal. This paper describes the development of a high speed analog to digital interface into a Digital Signal Processor (DSP). This system will be used for identifying the doppler shift of a LEO satellite through the Space Network, and aiding the ground station equipment in locking onto the signal. Although this interface is specific to one application, it can be used as a basis for interfacing other devices with a DSP.

Earth Observations taken by the Expedition Seven crew

NASA Image and Video Library

2003-10-26

ISS007-E-18086 (26 October 2003) --- The fires in the San Bernardino Mountains, fueled by Santa Ana winds, burned out of control on the morning of Oct. 26, 2003, when this image and several others were taken from the International Space Station. This frame and image numbers 18087 and 18088 were taken at approximately 19:54 GMT, October 26, 2003 with a digital still camera equipped with a 400mm lens. Lake Arrowhead and Silverwood Lake are just out of frame. Content was provided by JSC’s Earth Observation Lab. The International Space Station Program {link to http://spaceflight.nasa.gov} supports the laboratory to help astronauts take pictures of Earth that will be of the greatest value to scientists and the public, and to make those images freely available on the Internet. Additional images taken by astronauts and cosmonauts can be viewed at the NASA/JSC Gateway to Astronaut Photography of Earth [link to http://eol.jsc.nasa.gov/].

Earth Observations taken by the Expedition Seven crew

NASA Image and Video Library

2003-10-26

ISS007-E-18087 (26 October 2003) --- The fires in the San Bernardino Mountains, fueled by Santa Ana winds, burned out of control on the morning of Oct. 26, 2003, when this image and several others were taken from the International Space Station. This frame and image numbers 18086 and 18088 were taken at approximately 19:54 GMT, October 26, 2003 with a digital still camera equipped with a 400mm lens. Silverwood Lake is visible at the bottom of the image. Content was provided by JSC’s Earth Observation Lab. The International Space Station Program {link to http://spaceflight.nasa.gov} supports the laboratory to help astronauts take pictures of Earth that will be of the greatest value to scientists and the public, and to make those images freely available on the Internet. Additional images taken by astronauts and cosmonauts can be viewed at the NASA/JSC Gateway to Astronaut Photography of Earth [link to http://eol.jsc.nasa.gov/].

Earth Observations taken by the Expedition Seven crew

NASA Image and Video Library

2003-10-26

ISS007-E-18088 (26 October 2003) --- The fires in the San Bernardino Mountains, fueled by Santa Ana winds, burned out of control on the morning of Oct. 26, 2003, when this image and several others were taken from the International Space Station. This frame and image numbers 18086 and 18087 were taken at approximately 19:54 GMT, October 26, 2003 with a digital still camera equipped with a 400mm lens. Lake Arrowhead and Silverwood Lake are left and right, respectively, at bottom frame. Content was provided by JSC’s Earth Observation Lab. The International Space Station Program {link to http://spaceflight.nasa.gov} supports the laboratory to help astronauts take pictures of Earth that will be of the greatest value to scientists and the public, and to make those images freely available on the Internet. Additional images taken by astronauts and cosmonauts can be viewed at the NASA/JSC Gateway to Astronaut Photography of Earth [link to http://eol.jsc.nasa.gov/] .

Modernization of the Caltech/USGS Southern California Seismic Network

NASA Astrophysics Data System (ADS)

Bhadha, R.; Devora, A.; Hauksson, E.; Johnson, D.; Thomas, V.; Watkins, M.; Yip, R.; Yu, E.; Given, D.; Cone, G.; Koesterer, C.

2009-12-01

The USGS/ANSS/ARRA program is providing Government Furnished Equipment (GFE), and two year funding for upgrading the Caltech/USGS Southern California Seismic Network (SCSN). The SCSN is the modern digital ground motion seismic network in southern California that monitors seismicity and provides real-time earthquake information products such as rapid notifications, moment tensors, and ShakeMap. The SCSN has evolved through the years and now consists of several well-integrated components such as Short-Period analog, TERRAscope, digital stations, and real-time strong motion stations, or about 300 stations. In addition, the SCSN records data from about 100 stations provided by partner networks. To strengthen the ability of SCSN to meet the ANSS performance standards, we will install GFE and carry out the following upgrades and improvements of the various components of the SCSN: 1) Upgrade of dataloggers at seven TERRAscope stations; 2) Upgrade of dataloggers at 131 digital stations and upgrade broadband sensors at 25 stations; 3) Upgrade of SCSN metadata capabilities; 4) Upgrade of telemetry capabilities for both seismic and GPS data; and 5) Upgrade balers at stations with existing Q330 dataloggers. These upgrades will enable the SCSN to meet the ANSS Performance Standards more consistently than before. The new equipment will improve station uptimes and reduce maintenance costs. The new equipment will also provide improved waveform data quality and consequently superior data products. The data gaps due to various outages will be minimized, and ‘late’ data will be readily available through retrieval from on-site storage. Compared to the outdated equipment, the new equipment will speed up data delivery by about 10 sec, which is fast enough for earthquake early warning applications. The new equipment also has about a factor of ten lower consumption of power. We will also upgrade the SCSN data acquisition and data center facilities, which will improve the SCSN performance and metadata availability. We will improve existing software to facilitate the update of metadata, and to improve the interoperability between SeisNetWatch and our database of metadata. The improved software will also be made available to other regional networks as part of the CISN software distribution. These upgrades, will greatly improve the robustness of the SCSN, and facilitate higher quality and more reliable earthquake monitoring than was available before in southern California. The modernized SCSN will contribute to more coordinated search and rescue as well as economic resilience following a major earthquake by providing accurate earthquake information, and thus facilitate rapid deployment of field crews and rapid business resumption. Further, advances in seismological research will be facilitated by the high quality seismic data that will be collected in one of the most seismically active areas in the contiguous US.

Valve Health Monitoring System Utilizing Smart Instrumentation

NASA Technical Reports Server (NTRS)

Jensen, Scott L.; Drouant, George J.

2006-01-01

The valve monitoring system is a stand alone unit with network capabilities for integration into a higher level health management system. The system is designed for aiding in failure predictions of high-geared ball valves and linearly actuated valves. It performs data tracking and archiving for identifying degraded performance. The data collection types are cryogenic cycles, total cycles, inlet temperature, body temperature torsional strain, linear bonnet strain, preload position, total travel and total directional changes. Events are recorded and time stamped in accordance with the IRIG B True Time. The monitoring system is designed for use in a Class 1 Division II explosive environment. The basic configuration consists of several instrumentation sensor units and a base station. The sensor units are self contained microprocessor controlled and remotely mountable in three by three by two inches. Each unit is potted in a fire retardant substance without any cavities and limited to low operating power for maintaining safe operation in a hydrogen environment. The units are temperature monitored to safeguard against operation outside temperature limitations. Each contains 902-928 MHz band digital transmitters which meet Federal Communication Commission's requirements and are limited to a 35 foot transmission radius for preserving data security. The base-station controller correlates data from the sensor units and generates data event logs on a compact flash memory module for database uploading. The entries are also broadcast over an Ethernet network. Nitrogen purged National Electrical Manufactures Association (NEMA) Class 4 enclosures are used to house the base-station

Valve health monitoring system utilizing smart instrumentation

NASA Astrophysics Data System (ADS)

Jensen, Scott L.; Drouant, George J.

2006-05-01

The valve monitoring system is a stand alone unit with network capabilities for integration into a higher level health management system. The system is designed for aiding in failure predictions of high-geared ball valves and linearly actuated valves. It performs data tracking and archiving for identifying degraded performance. The data collection types are: cryogenic cycles, total cycles, inlet temperature, outlet temperature, body temperature, torsional strain, linear bonnet strain, preload position, total travel, and total directional changes. Events are recorded and time stamped in accordance with the IRIG B True Time. The monitoring system is designed for use in a Class 1 Division II explosive environment. The basic configuration consists of several instrumentation sensor units and a base station. The sensor units are self contained microprocessor controlled and remotely mountable in three by three by two inches. Each unit is potted in a fire retardant substance without any cavities and limited to low operating power for maintaining safe operation in a hydrogen environment. The units are temperature monitored to safeguard against operation outside temperature limitations. Each contains 902-928 MHz band digital transmitters which meet Federal Communication Commissions requirements and are limited to a 35 foot transmission radius for preserving data security. The base-station controller correlates related data from the sensor units and generates data event logs on a compact flash memory module for database uploading. The entries are also broadcast over an Ethernet network. Nitrogen purged National Electrical Manufactures Association (NEMA) Class 4 Enclosures are used to house the base-station.

Development of a Power Electronics Unit for the Space Station Plasma Contactor

NASA Technical Reports Server (NTRS)

Hamley, John A.; Hill, Gerald M.; Patterson, Michael J.; Saggio, Joseph, Jr.; Terdan, Fred; Mansell, Justin D.

1994-01-01

A hollow cathode plasma contactor has been baselined as a charge control device for the Space Station (SS) to prevent deleterious interactions of coated structural components with the ambient plasma. NASA LeRC Work Package 4 initiated the development of a plasma contactor system comprised of a Power Electronics Unit (PEU), an Expellant Management Unit (EMU), a command and data interface, and a Plasma Contactor Unit (PCU). A breadboard PEU was designed and fabricated. The breadboard PEU contains a cathode heater and discharge power supply, which were required to operate the PCU, a control and auxiliary power converter, an EMU interface, a command and telemetry interface, and a controller. The cathode heater and discharge supplies utilized a push-pull topology with a switching frequency of 20 kHz and pulse-width-modulated (PWM) control. A pulse ignition circuit derived from that used in arcjet power processors was incorporated in the discharge supply for discharge ignition. An 8088 based microcontroller was utilized in the breadboard model to provide a flexible platform for controller development with a simple command/data interface incorporating a direct connection to SS Mulitplexer/Demultiplexer (MDM) analog and digital I/O cards. Incorporating this in the flight model would eliminate the hardware and software overhead associated with a 1553 serial interface. The PEU autonomously operated the plasma contactor based on command inputs and was successfully integrated with a prototype plasma contactor unit demonstrating reliable ignition of the discharge and steady-state operation.

USMC UGS technology advancements

NASA Astrophysics Data System (ADS)

Hartup, David C.; Barr, Michael E.; Hirz, Philip M.; Kipp, Jason; Fishburn, Thomas A.; Waller, Ezra S.; Marks, Brian A.

2008-04-01

Technology advancements for the USMC UGS system are described. Integration of the ARL Blue Radio/CSR into the System Controller and Radio Repeater permit the TRSS system to operate seamlessly within the Family of UGS concept. In addition to the Blue Radio/CSR, the TRSS system provides VHF and SATCOM radio links. The TRSS system is compatible with a wide range of imagers, including those with both analog and digital interfaces. The TRSS System Controller permits simultaneous monitoring of 2 camera inputs. To complement enhanced compatibility and improved processing, the mechanical housing of the TRSS System Controller has been updated. The SDR-II, a system monitoring device, also incorporates four Blue Radio/CSRs along with other communication capabilities, making it an ideal choice for a monitoring station within the Family of UGS. Field testing of L-3 Nova's UGS system at YPG has shown flawless performance, capturing all 126 targets.

Cardio-PACs: a new opportunity

NASA Astrophysics Data System (ADS)

Heupler, Frederick A., Jr.; Thomas, James D.; Blume, Hartwig R.; Cecil, Robert A.; Heisler, Mary

2000-05-01

It is now possible to replace film-based image management in the cardiac catheterization laboratory with a Cardiology Picture Archiving and Communication System (Cardio-PACS) based on digital imaging technology. The first step in the conversion process is installation of a digital image acquisition system that is capable of generating high-quality DICOM-compatible images. The next three steps, which are the subject of this presentation, involve image display, distribution, and storage. Clinical requirements and associated cost considerations for these three steps are listed below: Image display: (1) Image quality equal to film, with DICOM format, lossless compression, image processing, desktop PC-based with color monitor, and physician-friendly imaging software; (2) Performance specifications include: acquire 30 frames/sec; replay 15 frames/sec; access to file server 5 seconds, and to archive 5 minutes; (3) Compatibility of image file, transmission, and processing formats; (4) Image manipulation: brightness, contrast, gray scale, zoom, biplane display, and quantification; (5) User-friendly control of image review. Image distribution: (1) Standard IP-based network between cardiac catheterization laboratories, file server, long-term archive, review stations, and remote sites; (2) Non-proprietary formats; (3) Bidirectional distribution. Image storage: (1) CD-ROM vs disk vs tape; (2) Verification of data integrity; (3) User-designated storage capacity for catheterization laboratory, file server, long-term archive. Costs: (1) Image acquisition equipment, file server, long-term archive; (2) Network infrastructure; (3) Review stations and software; (4) Maintenance and administration; (5) Future upgrades and expansion; (6) Personnel.

The potential of small unmanned aircraft systems and structure-from-motion for topographic surveys: A test of emerging integrated approaches at Cwm Idwal, North Wales

NASA Astrophysics Data System (ADS)

Tonkin, T. N.; Midgley, N. G.; Graham, D. J.; Labadz, J. C.

2014-12-01

Novel topographic survey methods that integrate both structure-from-motion (SfM) photogrammetry and small unmanned aircraft systems (sUAS) are a rapidly evolving investigative technique. Due to the diverse range of survey configurations available and the infancy of these new methods, further research is required. Here, the accuracy, precision and potential applications of this approach are investigated. A total of 543 images of the Cwm Idwal moraine-mound complex were captured from a light (< 5 kg) semi-autonomous multi-rotor unmanned aircraft system using a consumer-grade 18 MP compact digital camera. The images were used to produce a DSM (digital surface model) of the moraines. The DSM is in good agreement with 7761 total station survey points providing a total vertical RMSE value of 0.517 m and vertical RMSE values as low as 0.200 m for less densely vegetated areas of the DSM. High-precision topographic data can be acquired rapidly using this technique with the resulting DSMs and orthorectified aerial imagery at sub-decimetre resolutions. Positional errors on the total station dataset, vegetation and steep terrain are identified as the causes of vertical disagreement. Whilst this aerial survey approach is advocated for use in a range of geomorphological settings, care must be taken to ensure that adequate ground control is applied to give a high degree of accuracy.

97. View of International Business Machine (IBM) digital computer model ...

Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

97. View of International Business Machine (IBM) digital computer model 7090 magnetic core installation, international telephone and telegraph (ITT) Artic Services Inc., Official photograph BMEWS site II, Clear, AK, by unknown photographer, 17 September 1965, BMEWS, clear as negative no. A-6604. - Clear Air Force Station, Ballistic Missile Early Warning System Site II, One mile west of mile marker 293.5 on Parks Highway, 5 miles southwest of Anderson, Anderson, Denali Borough, AK

Translations on Telecommunications Policy, Research and Development, Number 13

DTIC Science & Technology

1977-09-14

9 Aug 77) 4 ATDA Says Research, Development Funds Being Wasted (THE AUSTRALIAN, 15 Aug 77) 5 Digital Unveils New Printer (THE AUSTRALIAN, 22...Argentina Accord 28 BOLIVIA Briefs Bolivian Television Reorganized 29 CUBA New Radio Station for Santa Cruz del Sur ( JUVENTUD REBELDE, 29 Jun 77...II micro- processor. The PM-DS/11 car- tridge disc memory sys- tem provides a double capacity plug-in alter- native to the Digital Equipment

An assessment of the utility of a non-metric digital camera for measuring standing trees

Treesearch

Neil Clark; Randolph H. Wynne; Daniel L. Schmoldt; Matthew F. Winn

2000-01-01

Images acquired with a commercially available digital camera were used to make measurements on 20 red oak (Quercus spp.) stems. The ranges of diameter at breast height (DBH) and height to a 10 cm upper-stem diameter were 16-66 cm and 12-20 m, respectively. Camera stations located 3, 6, 9, 12, and 15 m from the stem were studied to determine the best distance to be...

The GEOSCOPE program: state of the art in 2005

NASA Astrophysics Data System (ADS)

Roult, G.; Lepine, J.; Bonaime, S.; Riveira, L.; Geoscope Group, T.

2005-12-01

The GEOSCOPE program was launched in 1982 by the National Institute of Sciences of Universe (INSU), a department of the French National Center of Scientific Research (CNRS), at the instigation of the Institute of Physics of the Earth of Paris (IPGP). The purpose was the installation of about 25 stations well distributed worldwide (in particular in the southern hemisphere), in the standard configuration defined by the FDSN (very broad-band 24 bit, continuous recording at 20sps). The GEOSCOPE program is operating 28 digital 3-component very- broadband stations. Data from large events are teletransmitted from some stations (by phone RTC line or through internet) and made available within one day. A satellite transmission system is now working, in cooperation with the french military agency CEA/DASE, in cooperation with CTBTO (Dzumac in New Caledonia), and the data are available continuously, with a low gain. We are replacing the old Streckeisen digitizers with new Quanterra type ones, in order to be ready for the next step which will consist in gathering data towards our Data Center in real-time. Presently data from 6 stations arrive at the IPGP Geoscope Data Center in near real-time, with a delay depending on the station. The challenge is to link the maximum number of stations to our Data Center for getting data in real time; that purpose can be reached in few years. We are able to upgrade 3 or 4 stations every year, giving priority to the ones easy to link permanently to Paris. For the last ten years we've been progressively installing microbarometers and thermometers, transforming all our stations in multiparameter observatories. In terms of siting locations, the aim of the GEOSCOPE program is almost fulfilled; we re-installed the chinese station WUS with modern equipment in October 2004, we installed in December 2004 a new station TAOE in Marquesas Islands in cooperation with CEA/DASE, another one COYC in Patagonia (Chile) in December 2004. We plan to install a second station in Russia at high latitude at VOR (Vorkuta). In the framework of cooperation between IRIS and GEOSCOPE we installed in March 2004 a joint station at TRIS (Tristan Da Cunha), and we decided to share our equipment at KIP station that became a joint station. Our purpose is to maintain our stations at original sites (high latitudes) and to fill some geographical gaps in the southern hemisphere.

Astronauts Cockrell, Shepherd and Polansky during hatch opening

NASA Image and Video Library

2001-02-11

STS98-E-5130 (11 February 2001) --- The crews of Atlantis and the International Space Station open the Destiny laboratory on February 11 in this digital still camera view. From the left are astronauts Kenneth D. Cockrell, STS-98 commander; William M. (Bill) Shepherd, Expedition One commander; and Mark L. Polansky, STS-98 pilot. Later, the astronauts and cosmonauts spent the first full day of what are planned to be years of work ahead inside the orbiting science and command center. After Shepherd opened the Destiny hatch, he and Cockrell ventured inside at 8:38 a.m. (CST). As depicted in subsequent digital images in this series, members of both crews went to work quickly inside the new module, activating air systems, fire extinguishers, alarm systems, computers and internal communications. The crew also continued equipment transfers from the shuttle to the station.

Astronauts Cockrell, Shepherd and Polansky during hatch opening

NASA Image and Video Library

2001-02-11

STS98-E-5131 (11 February 2001) --- The crews of Atlantis and the International Space Station open the Destiny laboratory on February 11 in this digital still camera view. From the left are astronauts Kenneth D. Cockrell, STS-98 commander; William M. (Bill) Shepherd, Expedition One commander; and Mark L. Polansky, STS-98 pilot. Later, the astronauts and cosmonauts spent the first full day of what are planned to be years of work ahead inside the orbiting science and command center. After Shepherd opened the Destiny hatch, he and Cockrell ventured inside at 8:38 a.m. (CST). As depicted in subsequent digital images in this series, members of both crews went to work quickly inside the new module, activating air systems, fire extinguishers, alarm systems, computers and internal communications. The crew also continued equipment transfers from the shuttle to the station.

A Scaling Analysis of Frequency Dependent Energy Partition for Local and Regional Seismic Phases from Explosions

DTIC Science & Technology

2007-08-31

explosions at the former Soviet Semipalatinsk test site (STS). Labeled stations are those for which high resolution digital data are available. 12 8...characteristics of regional phase observations from underground nuclear explosions at the former Soviet Semipalatinsk and Novaya Zemlya test sites , the...various regional phases observed from underground nuclear explosions at the former Soviet Semipalatinsk test site (STS). Labeled stations are those for

View of STS-100 orbiter Endeavour approaching for docking

NASA Image and Video Library

2001-04-21

ISS002-E-5876 (21 April 2001) --- A distant view of the Space Shuttle Endeavour preparing to dock with the International Space Station (ISS) during the STS-100 mission. The STS-100 crewmembers are delivering the Canadarm2, Space Station Remote Manipulator System (SSRMS), and equipment stowed in the Multipurpose Logistics Module (MPLM) Raphaello to the ISS which are visible in Endeavour's payload bay. The image was taken with a digital still camera.

View of STS-100 orbiter Endeavour approaching for docking

NASA Image and Video Library

2001-04-21

ISS002-E-5887 (21 April 2001) --- A view of the Space Shuttle Endeavour preparing to dock with the International Space Station (ISS) during the STS-100 mission. The STS-100 crewmembers are delivering the Canadarm2, Space Station Remote Manipulator System (SSRMS), and equipment stowed in the Multipurpose Logistics Module (MPLM) Raphaello to the ISS which are visible in Endeavour's payload bay. The image was taken with a digital still camera.

A systematic analysis of directional site effects at stations of the Italian Seismic Network to test the role of local topography

NASA Astrophysics Data System (ADS)

Pischiutta, Marta; Cianfarra, Paola; Salvini, Francesco; Cara, Fabrizio; Vannoli, Paola

2018-03-01

Directional site effects observed at seismological stations on pronounced relief are analyzed. We investigate the ground motion properties calculating horizontal-to-vertical spectral ratios and horizontal polarization of both ambient vibrations and earthquake records using broadband seismograms of the Italian Seismic Network. We find that a subset of 47 stations with pronounced relief, results in a significant (>2) directional amplification of the horizontal component, with a well defined, site-specific direction of motion. However, the horizontal spectral response of sites is not uniform, varying from an isolated (resonant) frequency peak to a broadband amplification, interesting frequency bands as large as 1-10 Hz in many cases. Using the 47 selected stations, we have tried to establish a relation between directional amplification and topography geometry in a 2D-vision, when applicable, through a morphological analysis of the Digital Elevation Model using Geographic Information Systems. The procedure computes the parameters that characterize the geometry of topographic irregularities (size and slope), in combination with a principal component analysis that automatically yields the orientation of the elongated ridges. In seeking a relation between directional amplification and the surface morphology, we have found that it is impossible to fit the variety of observations with a resonant topography model as well as to identify common features in the ground motion behavior for stations with similar topography typologies. We conclude that, rather than the shape of the topography, local structural complexities and details of the near-surface structure must play a predominant role in controlling ground motion properties at sites with pronounced relief.

A systematic analysis of directional site effects at stations of the Italian seismic network to test the role of local topography

NASA Astrophysics Data System (ADS)

Pischiutta, Marta; Cianfarra, Paola; Salvini, Francesco; Cara, Fabrizio; Vannoli, Paola

2018-07-01

Directional site effects observed at seismological stations on pronounced relief are analysed. We investigate the ground motion properties calculating horizontal-to-vertical spectral ratios and horizontal polarization of both ambient vibrations and earthquake records using broad-band seismograms of the Italian seismic network. We find that a subset of 47 stations with pronounced relief results in a significant (>2) directional amplification of the horizontal component, with a well-defined, site-specific direction of motion. However, the horizontal spectral response of sites is not uniform, varying from an isolated (resonant) frequency peak to a broad-band amplification, interesting frequency bands as large as 1-10 Hz in many cases. Using 47 selected stations, we have tried to establish a relation between directional amplification and topography geometry in a 2-D vision, when applicable, through a morphological analysis of the digital elevation model using geographic information systems. The procedure computes the parameters that characterize the geometry of topographic irregularities (size and slope), in combination with a principal component analysis that automatically yields the orientation of the elongated ridges. In seeking a relation between directional amplification and the surface morphology, we have found that it is impossible to fit the variety of observations with a resonant topography model as well as to identify common features in the ground motion behaviour for stations with similar topography typologies. We conclude that, rather than the shape of the topography, local structural complexities and details of the near-surface structure must play a predominant role in controlling ground motion properties at sites with pronounced relief.

47 CFR 97.109 - Station control.

Code of Federal Regulations, 2013 CFR

2013-10-01

... 47 Telecommunication 5 2013-10-01 2013-10-01 false Station control. 97.109 Section 97.109... SERVICE Station Operation Standards § 97.109 Station control. (a) Each amateur station must have at least one control point. (b) When a station is being locally controlled, the control operator must be at the...

47 CFR 97.109 - Station control.

Code of Federal Regulations, 2010 CFR

2010-10-01

... 47 Telecommunication 5 2010-10-01 2010-10-01 false Station control. 97.109 Section 97.109... SERVICE Station Operation Standards § 97.109 Station control. (a) Each amateur station must have at least one control point. (b) When a station is being locally controlled, the control operator must be at the...

47 CFR 97.109 - Station control.

Code of Federal Regulations, 2011 CFR

2011-10-01

... 47 Telecommunication 5 2011-10-01 2011-10-01 false Station control. 97.109 Section 97.109... SERVICE Station Operation Standards § 97.109 Station control. (a) Each amateur station must have at least one control point. (b) When a station is being locally controlled, the control operator must be at the...

47 CFR 97.109 - Station control.

Code of Federal Regulations, 2014 CFR

2014-10-01

... 47 Telecommunication 5 2014-10-01 2014-10-01 false Station control. 97.109 Section 97.109... SERVICE Station Operation Standards § 97.109 Station control. (a) Each amateur station must have at least one control point. (b) When a station is being locally controlled, the control operator must be at the...

Evaluating Multi-Input/Multi-Output Digital Control Systems

NASA Technical Reports Server (NTRS)

Pototzky, Anthony S.; Wieseman, Carol D.; Hoadley, Sherwood T.; Mukhopadhyay, Vivek

1994-01-01

Controller-performance-evaluation (CPE) methodology for multi-input/multi-output (MIMO) digital control systems developed. Procedures identify potentially destabilizing controllers and confirm satisfactory performance of stabilizing ones. Methodology generic and used in many types of multi-loop digital-controller applications, including digital flight-control systems, digitally controlled spacecraft structures, and actively controlled wind-tunnel models. Also applicable to other complex, highly dynamic digital controllers, such as those in high-performance robot systems.

Construction and development of IGP DMC of China National Seismological Network

NASA Astrophysics Data System (ADS)

Zheng, X.; Zheng, J.; Lin, P.; Yao, Z.; Liang, J.

2011-12-01

In 2003, CEA (China Earthquake Administration) commenced the construction of China Digital Seismological Observation Network. By the end of 2007, a new-generation digital seismological observation system had been established, which consists of 1 National Seismic Network, 32 regional seismic networks, 2 small-aperture seismic arrays, 6 volcano monitoring networks and 19 mobile seismic networks, as well as CENC (China Earthquake Network Center) DMC (Data Management Centre) and IGP (Institute of Geophysics) DMC. Since then, the seismological observation system of China has completely entered a digital time. For operational, data backup and data security considerations, the DMC at the Institute of Geophysics (IGP), CEA was established at the end of 2007. IGP DMC now receives and archives waveform data from more than 1000 permanent seismic stations around China in real-time. After the great Wenchuan and Yushu earthquakes, the real-time waveform data from 56 and 8 portable seismic stations deployed in the aftershock area are added to IGP DMC. The technical system of IGP DMC is designed to conduct data management, processing and service through the network of CEA. We developed and integrated a hardware system with high-performance servers, large-capacity disc arrays, tape library and other facilities, as well as software packages for real-time waveform data receiving, storage, quality control, processing and service. Considering the demands from researchers for large quantities of seismic event waveform data, IGP DMC adopts an innovative "user order" method to extract event waveform data. Users can specify seismic stations, epicenter distance and record length. In a short period of 3 years, IGP DMC has supplied about 350 Terabytes waveform data to over 200 researches of more than 40 academic institutions. According to incomplete statistics, over 40 papers have been published in professional journals, in which 30 papers were indexed by SCI. Now, IGP DMC has become an important platform of promoting seismological researches in China. In the future, IGP DMC will continue to improve its technical system with powerful ability of waveform data processing, management and service, and to provide better and more data service to the research community. We expect IGP DMC to become an exchange and collaboration platform for geo-scientific researchers around the world.

Description of real-time Ada software implementation of a power system monitor for the Space Station Freedom PMAD DC testbed

NASA Technical Reports Server (NTRS)

Ludwig, Kimberly; Mackin, Michael; Wright, Theodore

1991-01-01

The Ada language software development to perform the electrical system monitoring functions for the NASA Lewis Research Center's Power Management and Distribution (PMAD) DC testbed is described. The results of the effort to implement this monitor are presented. The PMAD DC testbed is a reduced-scale prototype of the electrical power system to be used in the Space Station Freedom. The power is controlled by smart switches known as power control components (or switchgear). The power control components are currently coordinated by five Compaq 382/20e computers connected through an 802.4 local area network. One of these computers is designated as the control node with the other four acting as subsidiary controllers. The subsidiary controllers are connected to the power control components with a Mil-Std-1553 network. An operator interface is supplied by adding a sixth computer. The power system monitor algorithm is comprised of several functions including: periodic data acquisition, data smoothing, system performance analysis, and status reporting. Data is collected from the switchgear sensors every 100 milliseconds, then passed through a 2 Hz digital filter. System performance analysis includes power interruption and overcurrent detection. The reporting mechanism notifies an operator of any abnormalities in the system. Once per second, the system monitor provides data to the control node for further processing, such as state estimation. The system monitor required a hardware time interrupt to activate the data acquisition function. The execution time of the code was optimized using an assembly language routine. The routine allows direct vectoring of the processor to Ada language procedures that perform periodic control activities. A summary of the advantages and side effects of this technique are discussed.

47 CFR 74.790 - Permissible service of digital TV translator and LPTV stations.

Code of Federal Regulations, 2010 CFR

2010-10-01

... public service announcements (PSAs) and to seeking or acknowledging financial support deemed necessary to... contributors. The originations concerning financial support and PSAs are limited to 30 seconds each, no more...

37 CFR 381.6 - Performance of musical compositions by other public broadcasting entities.

Code of Federal Regulations, 2010 CFR

2010-07-01

... COPYRIGHT ROYALTY BOARD, LIBRARY OF CONGRESS RATES AND TERMS FOR STATUTORY LICENSES USE OF CERTAIN...-channel (“IBOC”) digital radio signal and such programming is different than the station's analog...

37 CFR 381.6 - Performance of musical compositions by other public broadcasting entities.

Code of Federal Regulations, 2012 CFR

2012-07-01

... COPYRIGHT ROYALTY BOARD, LIBRARY OF CONGRESS RATES AND TERMS FOR STATUTORY LICENSES USE OF CERTAIN...-channel (“IBOC”) digital radio signal and such programming is different than the station's analog...

Using inferential sensors for quality control of Everglades Depth Estimation Network water-level data

USGS Publications Warehouse

Petkewich, Matthew D.; Daamen, Ruby C.; Roehl, Edwin A.; Conrads, Paul

2016-09-29

The Everglades Depth Estimation Network (EDEN), with over 240 real-time gaging stations, provides hydrologic data for freshwater and tidal areas of the Everglades. These data are used to generate daily water-level and water-depth maps of the Everglades that are used to assess biotic responses to hydrologic change resulting from the U.S. Army Corps of Engineers Comprehensive Everglades Restoration Plan. The generation of EDEN daily water-level and water-depth maps is dependent on high quality real-time data from water-level stations. Real-time data are automatically checked for outliers by assigning minimum and maximum thresholds for each station. Small errors in the real-time data, such as gradual drift of malfunctioning pressure transducers, are more difficult to immediately identify with visual inspection of time-series plots and may only be identified during on-site inspections of the stations. Correcting these small errors in the data often is time consuming and water-level data may not be finalized for several months. To provide daily water-level and water-depth maps on a near real-time basis, EDEN needed an automated process to identify errors in water-level data and to provide estimates for missing or erroneous water-level data.The Automated Data Assurance and Management (ADAM) software uses inferential sensor technology often used in industrial applications. Rather than installing a redundant sensor to measure a process, such as an additional water-level station, inferential sensors, or virtual sensors, were developed for each station that make accurate estimates of the process measured by the hard sensor (water-level gaging station). The inferential sensors in the ADAM software are empirical models that use inputs from one or more proximal stations. The advantage of ADAM is that it provides a redundant signal to the sensor in the field without the environmental threats associated with field conditions at stations (flood or hurricane, for example). In the event that a station does malfunction, ADAM provides an accurate estimate for the period of missing data. The ADAM software also is used in the quality assurance and quality control of the data. The virtual signals are compared to the real-time data, and if the difference between the two signals exceeds a certain tolerance, corrective action to the data and (or) the gaging station can be taken. The ADAM software is automated so that, each morning, the real-time EDEN data are compared to the inferential sensor signals and digital reports highlighting potential erroneous real-time data are generated for appropriate support personnel. The development and application of inferential sensors is easily transferable to other real-time hydrologic monitoring networks.

The Los Alamos Seismic Network (LASN): Recent Network Upgrades and Northern New Mexico Earthquake Catalog Updates

NASA Astrophysics Data System (ADS)

Roberts, P. M.; House, L. S.; Greene, M.; Ten Cate, J. A.; Schultz-Fellenz, E. S.; Kelley, R.

2012-12-01

From the first data recorded in the fall of 1973 to now, the Los Alamos Seismograph Network (LASN) has operated for nearly 40 years. LASN data have been used to locate more than 2,500 earthquakes in north-central New Mexico. The network was installed for seismic verification research, as well as to monitor and locate earthquakes near Los Alamos National Laboratory (LANL). LASN stations are the only earthquake monitoring stations in New Mexico north of Albuquerque. In the late 1970s, LASN included 22 stations spread over a geographic area of 150 km (N-S) by 350 km (E-W), of northern New Mexico. In the early 1980s, the available funding limited the stations that could be operated to a set of 7, located within an area of about 15 km (N-S) by 15 km (E-W), centered on Los Alamos. Over the last 3 years, 6 additional stations have been installed, which have considerably expanded the spatial coverage of the network. These new stations take advantage of broadband state-of-the-art sensors as well as digital recording and telemetry technology. Currently, 7 stations have broadband, three-component seismometers with digital telemetry, and the remaining 6 have traditional 1 Hz short-period seismometers with analog telemetry. In addition, a vertical array of accelerometers was installed in a wellbore on LANL property. This borehole station has 3-component digital strong-motion sensors. In addition, four forensic strong-motion accelerometers (SMA) are operated at LANL facilities. With 3 of the new broadband stations in and around the nearby Valles Caldera, LASN is now able to monitor any very small volcano-seismic events that may be associated with the caldera. We will present a complete description of the current LASN station, instrumentation and telemetry configurations, as well as the data acquisition and event-detection software structure used to record events in Earthworm. More than 2,000 earthquakes were detected and located in north-central New Mexico during the first 11 years of LASN's operation (1973 to 1984). With the subsequent downsizing of the network, only 1-2 earthquakes per month were detected and located within about 150 km of Los Alamos. Over 850 of these nearby earthquakes have been located from 1973 to present. We recently updated the LASN earthquake catalog for north-central New Mexico up through 2011 and most of 2012. This involved re-assessing phase picks and ensuring that all locations are derived using updated station locations and the best available velocity model. We are also looking at subsets of the catalog that include earthquake swarms and clusters and applying relative location techniques to obtain high-precision re-locations for these events. Most events that were detected and located by LASN have magnitudes less than 1.5 and do not appear in the catalogs of any other network. We will present a newly updated map of north-central New Mexico seismicity based on these recent efforts.

A Computer Program to Model Passive Acoustic Antisubmarine Search Using Monte Carlo Simulation Techniques.

DTIC Science & Technology

1983-09-01

duplicate a continuous function on a digital computer, and thus the machine representatic- of the GMA is only a close approximation of the continuous...error process. Thus, the manner in which the GMA process is digitally replicated has an effect on the results of the simulation. The parameterization of...Information Center 2 Cameron Station Alexandria, Virginia 22314 2. Libary , Code 0142 2 Naval Postgraduate School Monterey, California 93943 3. Professor

Satellite freeze forecast system

NASA Technical Reports Server (NTRS)

Martsolf, J. D. (Principal Investigator)

1983-01-01

Provisions for back-up operations for the satellite freeze forecast system are discussed including software and hardware maintenance and DS/1000-1V linkage; troubleshooting; and digitized radar usage. The documentation developed; dissemination of data products via television and the IFAS computer network; data base management; predictive models; the installation of and progress towards the operational status of key stations; and digital data acquisition are also considered. The d addition of dew point temperature into the P-model is outlined.

Global energy and water cycle experiment (GEWEX) continental-scale international project (GCIP); reference data sets CD-ROM

USGS Publications Warehouse

Rea, Alan; Cederstrand, Joel R.

1994-01-01

The data sets on this compact disc are a compilation of several geographic reference data sets of interest to the global-change research community. The data sets were chosen with input from the Global Energy and Water Cycle Experiment (GEWEX) Continental-Scale International Project (GCIP) Data Committee and the GCIP Hydrometeorology and Atmospheric Subpanels. The data sets include: locations and periods of record for stream gages, reservoir gages, and meteorological stations; a 500-meter-resolution digital elevation model; grid-node locations for the Eta numerical weather-prediction model; and digital map data sets of geology, land use, streams, large reservoirs, average annual runoff, average annual precipitation, average annual temperature, average annual heating and cooling degree days, hydrologic units, and state and county boundaries. Also included are digital index maps for LANDSAT scenes, and for the U.S. Geological Survey 1:250,000, 1:100,000, and 1:24,000-scale map series. Most of the data sets cover the conterminous United States; the digital elevation model also includes part of southern Canada. The stream and reservoir gage and meteorological station files cover all states having area within the Mississippi River Basin plus that part of the Mississippi River Basin lying within Canada. Several data-base retrievals were processed by state, therefore many sites outside the Mississippi River Basin are included.

The performance of the stations of the Romanian seismic network in monitoring the local seismic activity

NASA Astrophysics Data System (ADS)

Ardeleanu, Luminita Angela; Neagoe, Cristian

2014-05-01

The seismic survey of the territory of Romania is mainly performed by the national seismic network operated by the National Institute for Earth Physics of Bucharest. After successive developments and upgrades, the network consists at present of 123 permanent stations equipped with high quality digital instruments (Kinemetrics K2, Quantera Q330, Quantera Q330HR, PS6-24 and Basalt digitizers) - 102 real time and 20 off-line stations - which cover the whole territory of the country. All permanent stations are supplied with 3 component accelerometers (episenzor type), while the real time stations are in addition provided with broadband (CMG3ESP, CMG40T, KS2000, KS54000, KS2000, CMG3T, STS2) or short period (SH-1, S13, Mark l4c, Ranger, GS21, L22_VEL) velocity sensors. Several communication systems are currently used for the real time data transmission: an analog line in UHF band, a line through GPRS (General Packet Radio Service), a dedicated line through satellite, and a dedicated line provided by the Romanian Special Telecommunication Service. During the period January 1, 2006 - June 30, 2013, 5936 shallow depth seismic events - earthquakes and quarry blasts - with local magnitude ML ≥ 1.2 were localized on the Romanian territory, or in its immediate vicinity, using the records of the national seismic network; 1467 subcrustal earthquakes (depth ≥ 60 km) with magnitude ML ≥ 1.9 were also localized in the Vrancea region, at the bend of the Eastern Carpathians. The goal of the present study is to evaluate the individual contribution of the real time seismic stations to the monitoring of the local seismicity. The performance of each station is estimated by taking into consideration the fraction of events that are localised using the station records, compared to the total number of events of the catalogue, occurred during the time of station operation. Taking into account the nonuniform space distribution of earthquakes, the location of the site and the recovery rate of reliable data are defining elements for the usefulness of a particular station. Our analysis provides a measure of station reliability, essential indicator for decisions regarding the increasing of effectiveness and future development of the Romanian seismic network.

Bursch on outside of Quest Airlock during EVA 3, Expedition Four

NASA Image and Video Library

2002-02-20

ISS004-E-8043 (20 February 2002) --- Astronaut Daniel W. Bursch, Expedition Four flight engineer, participates in the five-hour, 47-minute space walk on February 20, 2002. He moves among the oxygen and nitrogen tanks on the exterior of Quest Airlock. The square device (left) on the Space Station Remote Manipulator System (SSRMS) or Canadarm2 is the Materials International Space Station Experiment (MISSE). The image was recorded with a digital still camera.

Raffaello Multi-Purpose Logistics Module (MPLM) in the Endeavour payload bay prior to docking

NASA Image and Video Library

2001-04-21

ISS002-E-5815 (21 April 2001) --- The Raffaello Multi-Purpose Logistics Module (MPLM), built by the Italian Space Agency (ASI), sits in its berthed position in the cargo bay of the Space Shuttle Endeavour as the STS-100 crew eases the vehicle close to the International Space Station (ISS) for docking. The image was recorded with a digital still camera by one of the Expedition Two crew members aboard the Station.

Earth Observations taken by the Expedition 31 Crew

NASA Image and Video Library

2012-06-02

ISS031-E-84006 (2 June 2012) --- This digital image from the Expedition 31 crew aboard the International Space Station is one of a series from a mounted, automated, and nighttime session of a still camera when viewed in sequence shows the flame-ring associated with wild fires in the Southwest slip by in the upper right while the lights of the El Paso-Las Cruces rise from bottom center. A Russian spacecraft is docked to the station

47 CFR 90.249 - Control stations.

Code of Federal Regulations, 2011 CFR

2011-10-01

... 47 Telecommunication 5 2011-10-01 2011-10-01 false Control stations. 90.249 Section 90.249... MOBILE RADIO SERVICES Non-Voice and Other Specialized Operations § 90.249 Control stations. Control... following: (a) Frequencies for control stations. (1) Control stations may be authorized to operate on...

47 CFR 90.249 - Control stations.

Code of Federal Regulations, 2013 CFR

2013-10-01

... 47 Telecommunication 5 2013-10-01 2013-10-01 false Control stations. 90.249 Section 90.249... MOBILE RADIO SERVICES Non-Voice and Other Specialized Operations § 90.249 Control stations. Control... following: (a) Frequencies for control stations. (1) Control stations may be authorized to operate on...

47 CFR 90.249 - Control stations.

Code of Federal Regulations, 2014 CFR

2014-10-01

... 47 Telecommunication 5 2014-10-01 2014-10-01 false Control stations. 90.249 Section 90.249... MOBILE RADIO SERVICES Non-Voice and Other Specialized Operations § 90.249 Control stations. Control... following: (a) Frequencies for control stations. (1) Control stations may be authorized to operate on...

47 CFR 90.249 - Control stations.

Code of Federal Regulations, 2010 CFR

2010-10-01

... 47 Telecommunication 5 2010-10-01 2010-10-01 false Control stations. 90.249 Section 90.249... MOBILE RADIO SERVICES Non-Voice and Other Specialized Operations § 90.249 Control stations. Control... following: (a) Frequencies for control stations. (1) Control stations may be authorized to operate on...

Comparison of Two Digital Stethoscopes with the Traditional Stethoscope Used on International Space Station

NASA Technical Reports Server (NTRS)

Rasbury, Jack; Bascal, Kira; Ownby, Matt; McCulley, Phyllis; Paul, Bonnie

2004-01-01

A traditional stethoscope is currently flown on the International Space Station (ISS). The background noise on the ISS is much higher than a normal exam room, and the literature shows that traditional stethoscopes are unable to function effectively in high noise environments. Digital stethoscopes provide amplification which improves the audibility in a quiet environment. This study is designed to determine if digital stethoscopes offer any advantage over traditional stethoscopes in being able to identify normal and abnormal sounds in the ISS noise environment. Methods: An ISS noise simulation facility was created to reproduce ISS noise profiles by modifying pink noise with a software-based graphic equalizer. The files were played in a continuous loop on a computer, amplified through a high-end stereo system and adjusted using a sound level meter. Nine caregiver analogues were given the same auscultation lesson received by astronauts. They began testing by becoming familiar with normal and abnormal sounds on a Student Auscultation Manikin . They then used two digital stethoscopes and a traditional stethoscope identical to the one flown on the ISS to auscultate the manikin sounds in the noise facility. They identified the sounds on a questionnaire and picked which of the three stethoscopes they preferred. Results: Evaluators displayed equivalent accuracy in sound identification when using either the 3M model 4000 digital stethoscope or traditional stethoscope. However, the 3M was preferred 2 to 1 by the evaluators, primarily because of additional amplification of the sounds. Discussion: Although our results show that the current ISS stethoscope and the "best-of-breed" digital stethoscope provide essentially the same auscultation utility, the latter has the advantage of recording and transmitting sounds to a remote physician. Since the astronaut caregivers are non-physiCians, this capability may be worth the additional expense and effort needed to certify the digital stethoscope for flight.

International Space Station

NASA Technical Reports Server (NTRS)

1998-01-01

This artist's digital concept depicts the completely assembled International Space Station (ISS) passing over Florida. As a gateway to permanent human presence in space, the Space Station Program is to expand knowledge benefiting all people and nations. The ISS is a multidisciplinary laboratory, technology test bed, and observatory that will provide unprecedented undertakings in scientific, technological, and international experimentation. Experiments to be conducted in the ISS include: microgravity research, Earth science, space science, life sciences, space product development, and engineering research and technology. The sixteen countries participating the ISS are: United States, Russian Federation, Canada, Japan, United Kingdom, Germany, Italy, France, Norway, Netherlands, Belgium, Spain, Denmark, Sweden, Switzerland, and Brazil.

International Space Station (ISS)

NASA Image and Video Library

1998-01-01

This artist's digital concept depicts the completely assembled International Space Station (ISS) passing over Florida. As a gateway to permanent human presence in space, the Space Station Program is to expand knowledge benefiting all people and nations. The ISS is a multidisciplinary laboratory, technology test bed, and observatory that will provide unprecedented undertakings in scientific, technological, and international experimentation. Experiments to be conducted in the ISS include: microgravity research, Earth science, space science, life sciences, space product development, and engineering research and technology. The sixteen countries participating the ISS are: United States, Russian Federation, Canada, Japan, United Kingdom, Germany, Italy, France, Norway, Netherlands, Belgium, Spain, Denmark, Sweden, Switzerland, and Brazil.

LANDSAT information for state planning

NASA Technical Reports Server (NTRS)

Faust, N. L.; Spann, G. W.

1977-01-01

The transfer of remote sensing technology for the digital processing of LANDSAT data to state and local agencies in Georgia and other southeastern states is discussed. The project consists of a series of workshops, seminars, and demonstration efforts, and transfer of NASA-developed hardware concepts and computer software to state agencies. Throughout the multi-year effort, digital processing techniques have been emphasized classification algorithms. Software for LANDSAT data rectification and processing have been developed and/or transferred. A hardware system is available at EES (engineering experiment station) to allow user interactive processing of LANDSAT data. Seminars and workshops emphasize the digital approach to LANDSAT data utilization and the system improvements scheduled for LANDSATs C and D. Results of the project indicate a substantially increased awareness of the utility of digital LANDSAT processing techniques among the agencies contracted throughout the southeast. In Georgia, several agencies have jointly funded a program to map the entire state using digitally processed LANDSAT data.

Satellite analog FDMA/FM to digital TDMA conversion

NASA Technical Reports Server (NTRS)

Driggers, T.; Nguyen, T.; Kolavennu, V.

1987-01-01

The results of a study which investigated design issues regarding the use of analog to digital (A/D) conversion on board a satellite are presented. The need for A/D, and of course D/A as well, conversion arose from a satellite design which required analog FDMA/FM up and down links to/from a digitally modulated intersatellite link. There are also some advantages when one must interconnect a large number of various spot beams which are using analog, and therefore cannot take advantage of SS/TDMA switching among the beams, thus resulting in low fill factors. Various tradeoffs were performed regarding the implementation of on-board A/D processing, including mass, power, and costs. The various technologies which were considered included flash ADCs, surface acoustic wave (SAW) devices, and digital signal processing (DSP) chips. Impact analyses were also performed to determine the effect on ground stations to convert to digital if the A/D approach were not implemented.

47 CFR 80.71 - Operating controls for stations on land.

Code of Federal Regulations, 2010 CFR

2010-10-01

... 47 Telecommunication 5 2010-10-01 2010-10-01 false Operating controls for stations on land. 80.71... SERVICES STATIONS IN THE MARITIME SERVICES Operating Requirements and Procedures Station Requirements-Land Stations § 80.71 Operating controls for stations on land. Each coast station, Alaska-public fixed station...

Information management advanced development. Volume 1: Summary

NASA Technical Reports Server (NTRS)

Gerber, C. R.

1972-01-01

The information management systems designed for the modular space station are discussed. Subjects presented are: (1) communications terminal breadboard configuration, (2) digital data bus breadboard configuration, (3) data processing assembly definition, and (4) computer program (software) assembly definition.

78 FR 66704 - Information Collections Being Reviewed by the Federal Communications Commission

Federal Register 2010, 2011, 2012, 2013, 2014

2013-11-06

... Displacement Application. Form Number: FCC Form 346. Type of Review: Extension of a currently approved... station with facilities on out-of-core channels (channels 52-59) submit a digital displacement (FCC Form...

Image Transformations-Montserrat

NASA Technical Reports Server (NTRS)

2002-01-01

A slightly oblique digital photograph of Montserrat taken from the International Space Station was posted to Earth Observatory in December 2001. An Earth Observatory reader used widely available software to correct the oblique perspective and adjust the color. The story of how he modified the image includes step-by-step instructions that can be applied to other photographs. Photographs of Earth taken by astronauts have shaped our view of the Earth and are part of our popular culture because NASA makes them easily accessible to the public. Read the Transformations Story for more information. The original image was digital photograph number ISS002-E-9309, taken on July 9, 2001, from the International Space Station and was provided by the Earth Sciences and Image Analysis Laboratory at Johnson Space Center. Additional images taken by astronauts and cosmonauts can be viewed at the NASA-JSC Gateway to Astronaut Photography of Earth. Bill Innanen provided the transformed image and the story of how he did it.

Antarctic atmospheric infrasound. Final technical report, 1 July 1981-30 September 1984

DOE Office of Scientific and Technical Information (OSTI.GOV)

Wilson, C.R.; McKibben, B.N.

1986-11-01

In order to monitor atmospheric infrasonic waves in the passband from 0.1 to 0.01 Hz a digital infrasonic detection system was installed in Antarctica on the Ross Ice shelf near McMurdo Station on McMurdo Sound. An array of seven infrasonic microphones subtending an area of about 35 sg km was operated in Windless Bight. The analog microphone data were telemetered to McMurdo station where the infrasonic date were digitized and subjected to on-line real-time analysis to detect traveling infrasonic waves with periods from 10 to 100 seconds. During the period of operation of the Antartic infrasonic observatory, hundreds of infrasonicmore » signals were detected in association with many natural sources such as the aurora australis, marine storm sea-air interactions, volcanic eruptions, mountain generated lee-wave effects, large meteors and auroral electrojet supersonic motions.« less

Astronauts Cockrell, Shepherd and Polansky during hatch opening

NASA Image and Video Library

2001-02-11

STS98-E-5133 (11 February 2001) --- The crew commanders of Atlantis and the International Space Station shake hands following the opening of the Destiny laboratory on February 11 in this digital still camera view. From the left are astronauts Kenneth D. Cockrell, STS-98 commander; William M. (Bill) Shepherd, Expedition One commander; and Mark L. Polansky, STS-98 pilot. Later, the astronauts and cosmonauts spent the first full day of what are planned to be years of work ahead inside the orbiting science and command center. After Shepherd opened the Destiny hatch, he and Cockrell ventured inside at 8:38 a.m. (CST). As depicted in subsequent digital images in this series, members of both crews went to work quickly inside the new module, activating air systems, fire extinguishers, alarm systems, computers and internal communications. The crew also continued equipment transfers from the shuttle to the station.

Single Event Upset Analysis: On-orbit performance of the Alpha Magnetic Spectrometer Digital Signal Processor Memory aboard the International Space Station

NASA Astrophysics Data System (ADS)

Li, Jiaqiang; Choutko, Vitaly; Xiao, Liyi

2018-03-01

Based on the collection of error data from the Alpha Magnetic Spectrometer (AMS) Digital Signal Processors (DSP), on-orbit Single Event Upsets (SEUs) of the DSP program memory are analyzed. The daily error distribution and time intervals between errors are calculated to evaluate the reliability of the system. The particle density distribution of International Space Station (ISS) orbit is presented and the effects from the South Atlantic Anomaly (SAA) and the geomagnetic poles are analyzed. The impact of solar events on the DSP program memory is carried out combining data analysis and Monte Carlo simulation (MC). From the analysis and simulation results, it is concluded that the area corresponding to the SAA is the main source of errors on the ISS orbit. Solar events can also cause errors on DSP program memory, but the effect depends on the on-orbit particle density.

A method for remote sounding of a bottom relief of water objects with using GPS

NASA Astrophysics Data System (ADS)

Mamontova, L. S.

2014-12-01

The no-fly automated system of small rivers' depth's measurement which is based on a combination of a differential method GPS-definition of the pro-measured vessel's coordinates both the method of depth's measurement with sonic depth finder and the method of the vessel's management was examined in this article.On the central station the digital card with a relief for a pro-measured zone of the reservoir is formed and the position of a pro-measured vessel on the tacks is controlled thanks to the coordinates of a pro-measured vessel and depth's measurements with sonic depth finder.The offered system allows to raise the level of depth's pro-measured works.

Mikhnevo: from seismic station no. 1 to a modern geophysical observatory

NASA Astrophysics Data System (ADS)

Adushkin, V. V.; Ovchinnikov, V. M.; Sanina, I. A.; Riznichenko, O. Yu.

2016-01-01

The Mikhnevo seismic station was founded in accordance with directive no. 1134 RS of the Council of Ministers of the Soviet Union of February 6, 1954. The station, installed south of Moscow, began its operations on monitoring nuclear tests in the United States and England in 1954. For dozens of years this station was the leading experimental base for elaborating new technical solutions and methods for monitoring nuclear explosions, equipped with modern seismological instruments. At present, the focus of activities has been moved from military applications to fundamental geophysical research. The station preserves its leading position in seismological observations due to the development of national high-performance digital instruments and creation of the small-aperture seismic array, the only one in the central part of European Russia, which is capable of recording weak seismic events with M L ≥ 1.5 within a distance of 100 km.

A solar station in Ica - Mutsumi Ishitsuka: a research center to improve education at the university and schools

NASA Astrophysics Data System (ADS)

Terrazas-Ramos, Raúl

2012-07-01

The San Luis Gonzaga National University of Ica has built a solar station, in collaboration with the Geophysical Institute of Peru, the National Astronomical Observatory of Japan and the Hida Observatory. The Solar Station has the following equipment: a digital Spectrograph Solar Refractor Telescope Takahashi 15 cm aperture, 60 cm reflector telescope aperture, a magnetometer-MAGDAS/CPNM and a Burst Monitor Telescope Solar-FMT (Project CHAIN). These teams support the development of astronomical science and Ica in Peru, likewise contributing to science worldwide. The development of basic science will be guaranteed when university students, professors and researchers work together. The Solar Station will be useful for studying the different levels of university education and also for the general public. The Solar Station will be a good way to spread science in the region through public disclosure.

Digitized Database of Old Seismograms Recorder in Romania

NASA Astrophysics Data System (ADS)

Paulescu, Daniel; Rogozea, Maria; Popa, Mihaela; Radulian, Mircea

2016-08-01

The aim of this paper is to describe a managing system for a unique Romanian database of historical seismograms and complementary documentation (metadata) and its dissemination and analysis procedure. For this study, 5188 historical seismograms recorded between 1903 and 1957 by the Romanian seismological observatories (Bucharest-Filaret, Focşani, Bacău, Vrincioaia, Câmpulung-Muscel, Iaşi) were used. In order to reconsider the historical instrumental data, the analog seismograms are converted to digital images and digital waveforms (digitization/ vectorialisation). First, we applied a careful scanning procedure of the seismograms and related material (seismic bulletins, station books, etc.). In a next step, the high resolution scanned seismograms will be processed to obtain the digital/numeric waveforms. We used a Colortrac Smartlf Cx40 scanner which provides images in TIFF or JPG format. For digitization the algorithm Teseo2 developed by the National Institute of Geophysics and Volcanology in Rome (Italy), within the framework of the SISMOS Project, will be used.

Digital redesign of anti-wind-up controller for cascaded analog system.

PubMed

Chen, Y S; Tsai, J S H; Shieh, L S; Moussighi, M M

2003-01-01

The cascaded conventional anti-wind-up (CAW) design method for integral controller is discussed. Then, the prediction-based digital redesign methodology is utilized to find the new pulse amplitude modulated (PAM) digital controller for effective digital control of the analog plant with input saturation constraint. The desired digital controller is determined from existing or pre-designed CAW analog controller. The proposed method provides a novel methodology for indirect digital design of a continuous-time unity output-feedback system with a cascaded analog controller as in the case of PID controllers for industrial control processes with the presence of actuator saturations. It enables us to implement an existing or pre-designed cascaded CAW analog controller via a digital controller effectively.

47 CFR 80.80 - Operating controls for ship stations.

Code of Federal Regulations, 2011 CFR

2011-10-01

... 47 Telecommunication 5 2011-10-01 2011-10-01 false Operating controls for ship stations. 80.80... SERVICES STATIONS IN THE MARITIME SERVICES Operating Requirements and Procedures Station Requirements-Ship Stations § 80.80 Operating controls for ship stations. (a) Each control point must be capable of: (1...

47 CFR 80.80 - Operating controls for ship stations.

Code of Federal Regulations, 2012 CFR

2012-10-01

... 47 Telecommunication 5 2012-10-01 2012-10-01 false Operating controls for ship stations. 80.80... SERVICES STATIONS IN THE MARITIME SERVICES Operating Requirements and Procedures Station Requirements-Ship Stations § 80.80 Operating controls for ship stations. (a) Each control point must be capable of: (1...

47 CFR 80.80 - Operating controls for ship stations.

Code of Federal Regulations, 2014 CFR

2014-10-01

... 47 Telecommunication 5 2014-10-01 2014-10-01 false Operating controls for ship stations. 80.80... SERVICES STATIONS IN THE MARITIME SERVICES Operating Requirements and Procedures Station Requirements-Ship Stations § 80.80 Operating controls for ship stations. (a) Each control point must be capable of: (1...

47 CFR 80.80 - Operating controls for ship stations.

Code of Federal Regulations, 2013 CFR

2013-10-01

... 47 Telecommunication 5 2013-10-01 2013-10-01 false Operating controls for ship stations. 80.80... SERVICES STATIONS IN THE MARITIME SERVICES Operating Requirements and Procedures Station Requirements-Ship Stations § 80.80 Operating controls for ship stations. (a) Each control point must be capable of: (1...

Monitoring of the orbital position of geostationary satellite by spatially separated reception of signals of digital satellite television

NASA Astrophysics Data System (ADS)

Kaliuzhnyi, M. P.; Bushuev, F. I.; Sibiriakova, Ye. S.; Shulga, O. V.; Shakun, L. S.; Bezrukovs, V.; Kulishenko, V. F.; Moskalenko, S. S.; Malynovsky, Ye. V.; Balagura, O. A.

2017-02-01

The results of the determination of the geostationary satellite "Eutelsat-13B" orbital position obtained during 2015-2016 years using European stations' network for reception of DVB-S signals from the satellite are presented. The network consists of five stations located in Ukraine and Latvia. The stations are equipped with a radio engineering complex developed by the RI "MAO". The measured parameter is a time difference of arrival (TDOA) of the DVB-S signals to the stations of the network. The errors of TDOA determination and satellite coordinates, obtained using a numerical model of satellite motion, are equal ±2.6 m and ±35 m respectively. Software implementation of the numerical model is taken from the free space dynamics library OREKIT.

Index of stations: surface-water data-collection network of Texas, September 1999

USGS Publications Warehouse

Gandara, Susan C.; Barbie, Dana L.

2001-01-01

As of September 30, 1999, the surface-water data-collection network of Texas (table 1) included 321 continuous-record streamflow stations (D), 20 continuous-record gage-height only stations (G), 24 crest-stage partial-record stations (C), 40 floodhydrograph partial-record stations (H), 25 low-flow partial-record stations (L), 1 continuous-record temperature station (M1), 25 continuous-record temperature and specific conductance stations (M2), 17 continuous-record temperature, specific conductance, dissolved oxygen, and pH stations (M4), 4 daily water-quality stations (Qd), 115 periodic water-quality stations (Qp), 17 reservoir/lake surveys for water quality stations (Qs), 85 continuous or daily reservoircontent stations (R), and 10 daily precipitation stations (Pd). Plate 1 identifies the major river basins in Texas and shows the location of the stations listed in table 1. Table 1 shows the station number and name, latitude and longitude, type of station, and office responsible for the collection of the data and maintenance of the record. An 8-digit permanent numerical designation for all gaging stations has been adopted on a nationwide basis; stations are numbered and listed in downstream order. In the downstream direction along the main stem, all stations on a tributary entering between two main-stem stations are listed between these two stations. A similar order is followed in listing stations by first rank, second rank, and other ranks of tributaries. The rank of any tributary, with respect to the stream to which it is an immediate tributary, is indicated by an indention in the table. Each indention represents one rank. This downstream order and system of indention shows which gaging stations are on tributaries between any two stations on a main stem and the rank of the tributary on which each gaging station is situated.

Extended experience with digital radiography and viewing in an ICU environment

NASA Astrophysics Data System (ADS)

Humphrey, Louis M.; Fitzpatrick, Kevin; Paine, Susan; Ravin, Carl E.

1992-07-01

After several years of continual operation, the utility of digital viewing stations was investigated by distributing questionnaires to past and present users. The results of the questionnaire indicated that the respondents preferred using the workstations over handling film. For evaluation of line placements, chest tubes and pleural effusions, softcopy display was preferred over hardcopy. However, for analysis of air space disease and pneumothorax, images displayed on the workstation were not perceived to be as useful as standard hardcopy.

47 CFR 95.139 - Adding a small base station or a small control station.

Code of Federal Regulations, 2010 CFR

2010-10-01

... 47 Telecommunication 5 2010-10-01 2010-10-01 false Adding a small base station or a small control... base station or a small control station. (a) Except for a GMRS system licensed to a non-individual, one or more small base stations or a small control station may be added to a GMRS system at any point...

Spaceborne Autonomous and Ground Based Relative Orbit Control for the TerraSAR-X/TanDEM-X Formation

NASA Technical Reports Server (NTRS)

Ardaens, J. S.; D'Amico, S.; Kazeminejad, B.; Montenbruck, O.; Gill, E.

2007-01-01

TerraSAR-X (TSX) and TanDEM-X (TDX) are two advanced synthetic aperture radar (SAR) satellites flying in formation. SAR interferometry allows a high resolution imaging of the Earth by processing SAR images obtained from two slightly different orbits. TSX operates as a repeat-pass interferometer in the first phase of its lifetime and will be supplemented after two years by TDX in order to produce digital elevation models (DEM) with unprecedented accuracy. Such a flying formation makes indeed possible a simultaneous interferometric data acquisition characterized by highly flexible baselines with range of variations between a few hundreds meters and several kilometers [1]. TSX has been successfully launched on the 15th of June, 2007. TDX is expected to be launched on the 31st of May, 2009. A safe and robust maintenance of the formation is based on the concept of relative eccentricity/inclination (e/i) vector separation whose efficiency has already been demonstrated during the Gravity Recovery and Climate Experiment (GRACE) [2]. Here, the satellite relative motion is parameterized by mean of relative orbit elements and the key idea is to align the relative eccentricity and inclination vectors to minimize the hazard of a collision. Previous studies have already shown the pertinence of this concept and have described the way of controlling the formation using an impulsive deterministic control law [3]. Despite the completely different relative orbit control requirements, the same approach can be applied to the TSX/TDX formation. The task of TDX is to maintain the close formation configuration by actively controlling its relative motion with respect to TSX, the leader of the formation. TDX must replicate the absolute orbit keeping maneuvers executed by TSX and also compensate the natural deviation of the relative e/i vectors. In fact the relative orbital elements of the formation tend to drift because of the secular non-keplerian perturbations acting on both satellites. The goal of the ground segment is thus to regularly correct this configuration by performing small orbit correction maneuvers on TDX. The ground station contacts are limited due to the geographic position of the station and the costs for contact time. Only with a polar ground station a contact visibility is possible every orbit for LEO satellites. TSX and TDX use only the Weilheim ground station (in the southern part of Germany) during routine operations. This station allows two scheduled contact per day for the nominal orbit configuration, meaning that the satellite conditions can be checked with an interval of 12 hours. While this limitation is usually not critical for single satellite operations, the visibility constraints drive the achievable orbit control accuracy for a LEO formation if a ground based approach is chosen. Along-track position uncertainties and maneuver execution errors affect the relative motion and can be compensated only after a ground station contact.

Earth Observations taken by Expedition 26 crewmember

NASA Image and Video Library

2011-02-20

ISS026-E-028384 (22 Feb. 2011) --- This high oblique night time view of the bottom two thirds of the Florida peninsula, photographed by an Expedition 26 crew member aboard the International Space Station at 220 miles above Earth, displays many of the state's well-lighted metropolitan areas. The crew member used a digital still camera equipped with an 80-mm lens to expose the frame. The station was above the Gulf of Mexico, facing eastward toward the Atlantic, at the time the photo was taken.

MS Ivins floats through U.S. Laboratory / Destiny module

NASA Image and Video Library

2001-02-11

STS98-E-5161 (11 February 2001) --- Astronaut Marsha S. Ivins, STS-98 mission specialist, floats into the newly attached Destiny laboratory onboard the International Space Station (ISS). After the Destiny hatch was opened early in the day, members of both crews went to work quickly inside the new module, activating air systems, fire extinguishers, alarm systems, computers and internal communications. The crews also took some photos and continued equipment transfers from the shuttle to the station. The scene was taken with a digital still camera.

DOE Office of Scientific and Technical Information (OSTI.GOV)

Nekoogar, Faranak; Reynolds, Matthew; Lefton, Scott

A secure optionally passive RFID tag or sensor system comprises a passive RFID tag having means for receiving radio signals from at least one base station and for transmitting radio signals to at least one base station, where the tag is capable of being powered exclusively by received radio energy, and an external power and data logging device having at least one battery and electronic circuitry including a digital memory configured for storing and recalling data. The external power and data logging device has a means for powering the tag, and also has a means.

PROMIS series. Volume 8: Midlatitude ground magnetograms

NASA Technical Reports Server (NTRS)

Fairfield, D. H.; Russell, C. T.

1990-01-01

This is the eighth in a series of volumes pertaining to the Polar Region Outer Magnetosphere International Study (PROMIS). This volume contains 24 hour stack plots of 1-minute average, H and D component, ground magnetograms for the period March 10 through June 16, 1986. Nine midlatitude ground stations were selected from the UCLA magnetogram data base that was constructed from all available digitized magnetogram stations. The primary purpose of this publication is to allow users to define universal times and onset longitudes of magnetospheric substorms.

Mapping Sequence performed during the STS-117 R-Bar Pitch Maneuver

NASA Image and Video Library

2007-06-10

ISS015-E-11298 (10 June 2007) --- This is one of a series of images photographed with a digital still camera using an 800mm focal length featuring the different areas of the Space Shuttle Atlantis as it approached the International Space Station and performed a back-flip to accommodate close scrutiny by eyeballs and cameras. This image shows part of the commander's side or port side of Atlantis' cabin. Distance from the station and shuttle at this time was approximately 600 feet.

Mapping Sequence performed during the STS-118 R-Bar Pitch Maneuver

NASA Image and Video Library

2007-08-10

ISS015-E-21344 (10 Aug. 2007) --- This is one of a series of images photographed with a digital still camera using an 800mm focal length featuring the different areas of the Space Shuttle Endeavour as it approached the International Space Station and performed a back-flip to accommodate close scrutiny by eyeballs and cameras. This image shows the nose cone of Endeavour and surrounding area. Distance between the station and shuttle at this time was approximately 600 feet.

Distributed Optimization of Multi Beam Directional Communication Networks

DTIC Science & Technology

2017-06-30

kT is the noise figure of the receiver. The path loss from node i to the central station is denoted as fi,C and is similarly defined. We seek to...optimally allocate power among several transmit beams per node in order to maximize the total signal-to- interference noise ratio at the central station...Computing, vol. 15, no. 9, September 2016. [6] X. Quan, Y. Liu, S. Shao, C. Huang, and Y. Tang, “Impacts of Phase Noise on Digital Self-Iinterference

Fly-around view of the ISS

NASA Image and Video Library

2001-03-19

STS102-E-5315 (18 March 2001) --- The International Space Station (ISS) backdropped against a mass of clouds over Earth was photographed with a digital still camera from the Space Shuttle Discovery on March 18, 2001. It is a standard operation for the shuttle to make a final fly-around of the outpost following unlinking from it. A new crew comprised of cosmonaut Yury V. Usachev and astronauts James S. Voss and Susan J. Helms will spend several months aboard the station.

ISS seen during flyaround

NASA Image and Video Library

2001-02-16

STS98-E-5310 (16 February 2001) --- Sporting an important new component in the Destiny laboratory (near center of frame), the International Space Station (ISS) is backdropped against the blackness of space following undocking. The photo was taken with a digital still camera.

Usachev with docking probe in Destiny module

NASA Image and Video Library

2001-05-30

ISS002-E-6576 (30 May 2001) --- Yury V. Usachev of Rosaviakosmos, Expedition Two mission commander, moves a docking probe through the Destiny Laboratory on the International Space Station (ISS). The image was recorded with a digital still camera.

Voss and Wetherbee open the hatch to the ISS

NASA Image and Video Library

2001-03-10

TS102-E-5089 (10 March 2001) --- Astronauts James D. Wetherbee (top) and James S. Voss, STS-102 commander and mission specialist, respectively, open hatch to the Space Station. The photograph was recorded with a digital still camera.