The design and operation of a differential absorption lidar system capable of remotely measuring the
NASA Technical Reports Server (NTRS)
A ground-based differential absorption lidar (DIAL) system is described which has been developed for
Page 1. i Modeling Multiple Scattering and Absorption for a Differential Absorption LIDAR System by Daniel D. Blevins BS ...
DTIC Science & Technology
Mobile differential absorption lidar (DIAL) systems have been used for the last two decades. The lidar group in Lund has performed many DIAL measurements with a mobile lidar system which was first described in 1987. This report describes how that system ...
National Technical Information Service (NTIS)
Measurement Description: The UV Differential Absorption Lidar (DIAL) system is used to measure aerosol, cloud, and ozone profiles above the aircraft [Browell ...
NASA Website
Computer hardware and software of the NASA multipurpose differential absorption lidar (DIAL) sysatem
... range and chem-bio agent detection limits of direct detection LWIR differential absorption LIDAR systems * Standoff range: ~ 2x increase for fixed ...
The system control and signal conditioning electronics of the NASA three laser airborne differential
This report describes the background theory, experimental techniques, and results of research relating to lidar polarization, scattering, and absorption effects using the GL/OP low altitude lidar system. The work, which is aimed at improving the understan...
The Lidar Atmospheric Sensing Experiment (LASE) Instrument is the first fully-engineered, autonomous Differential Absorption Lidar (DIAL) System for the measurement of water vapor in the troposphere (aerosol and cloud measurements are included). LASE uses...
The present volume on lidar for remote sensing discusses lidar system techniques for remote sensing of atmospheric pollution, airborne and surface-based lidar for environmental sensing of water and oceans, Doppler lidar for wind sensing and related measurement, aerosol measurements using ...
Energy Citations Database
Differential absorption lidar and Raman lidar have been applied to the range-resolved measurements of water vapor density for more than 20 years. During this period, there have been considerable advances in laser and lidar technology, as well as in the understanding of the factors required to optimize both ...
The development of eye-safe, solid-state Lidar systems is discussed, with an emphasis on Coherent Doppler Lidar for Atmospheric Wind Measurements. The following subject areas are covered: tunable Ho DIAL (Differential Absorption Lidar)/lidar atmospheric m...
A measurement of ambient nitrogen dioxide concentration by an air quality monitoring station, and a visible lidar system using a differential absorption lidar (DIAL) technique are performed. The agreement between measured values is within experimental error of the lidar results for average wind ...
from a lidar system for measurements of ozone profiles in the troposphere ... and the two output wavelengths are generated and ... recorder/photon counting system (Licel). 1 .�e7 ... M. L. White, Differential Absorption Lidar Systems at JPL - ...
profiles obtained by differential absorption lidar (DIAL) analysis. ... Differential absorption lidars (DIAL) have been and continue to be widely used for the ...
The capabilities of the DIAL data acquisition system (DAS) for the remote measurement of atmospheric
An extension of the Kalman-Bucy algorithm for on-line estimation of multimaterial path-integrated concentration from multiwavelength differential absorption lidar time series data is presented in which the system model covariance is adaptively estimated from the input data. Performance of the filter is compared with that of a ...
PubMed
The Water Vapor Lidar was modified and extended to make differential absorption measurements of ozone. Water vapor measurements make use of a weak molecular scattering process known as Raman scattering. It is characterized by a shift in wavelength of the ...
Improvements to and complementary systems for a differential absorption lidar system for field work are discussed. A dual-wavelength laser and a dual-wavelength detection system, which make DIAL with simultaneous lidar measurements at two wavelengths possible, are ...
These activities have included the development and application of airborne Differential Absorption LiDAR (DIAL) systems for studies of ozone, water vapor, ...
Lidar, an acronym for light detection and ranging, represents a class of instruments that utilize lasers to send probe beams into the atmosphere or onto the surface of the Earth and detect the backscattered return in order to measure properties of the atmosphere or surface. The associated technology has matured to the point where two lidar facilities, ...
NASA Astrophysics Data System (ADS)
A differential absorption and scattering lidar that measures hydrogen chloride with a sensitivity of
A parametric analysis of the Shuttle-borne differential absorption lidar concept for the measurement
As part of its program to develop coherent heterodyne detection lidar technology for space, airborne, and ground based applications, the Optical Environment Division of the USAF's Phillips Laboratory developed a compact coherent CO2 TEA lidar system. Although originally conceived as a high altitude balloon borne ...
A differential absorption of scattered energy (DASE) Lidar scheme which uses polarization discrimination to distinguish between simultaneously backscattered Lidar return signals at two close lying wavelengths was conceived, analyzed, designed and built into a complete Lidar system. The ...
A single-ended laser radar (LIDAR) system was designed, built, and successfully operated to measure range-resolved concentrations of NO2, SO2, and O3 in the atmosphere using a Differential Absorption of Scattered Energy (DASE) LIDAR technique. The system used a flash-lamp pumped ...
EPA Science Inventory
In the context of this project, a UV lidar system was developed to measure the change with time of the vertical ozone distribution in the troposphere between about 0.1 km and 12 km above the site of the lidar (740 m above 0D). This very large range of mea...
... Title : NONLINEAR RESONANT ABSORPTION EFFECTS ON THE DESIGN OF RESONANCE FLUORESCENCE LIDARS AND LASER GUIDE ...
The horizontal distribution of ozone is measured by the DIAL-technique in an atmospheric layer near the surface. The laser system, which is first of all conceived as a laboratory experiment, provides spatially resolved measurements of the ozone-concentrat...
The design of a double pulsed, injection seeded, 2-micrometer compact coherent Differential absorption Lidar (DIAL) transmitter for CO2 sensing is presented. This system is hardened for ground and airborne applications. The design architecture includes th...
Many studies recently have investigated the active remote sensing of atmospheric greenhouse gases, such as CO2 and CH4, by means of differential absorption lidar systems. According to them, the accuracy of the laser wavelengths used is one of the most important issues of this technique in terms of conformance to the high measurement ...
A brief survey is given of remote measurements of air pollutants by the differential absorption technique. The use of differential absorption lidar (DIAL) systems in pollution studies is discussed, and suitable lasers are identified. Some results are presented for DIAL measurements with a tunable CO2 laser of the ...
The University of Wisconsin high spectral resolution lidar (HSRL) measures optical properties of the
A small compact ozone differential absorption lidar capable of being deployed on a small aircraft or
Development of advanced differential absorption lidar (DIAL) receivers is very important to increase
The theory of differential absorption lidar measurements for lines with a Voigt profile is given and
By combining the capability of a differential absorption lidar (DIAL) and the excellent characteristics of a micro pulse lidar (MPL) we have designed and tested a micro pulse DIAL system, which could be operated from the ground or airborne platform, to monitor the atmospheric water vapor mixing ratio. To maintain ...
The uses of light detection and ranging system (lidar) are examined. Lidar can measure metal vapors and trace gases, reflection coefficients of the earth surface, and wind velocities within the atmosphere. A 'multidisciplinary' airborne lidar is described which will detect both aerosols by the backscattering of ...
... These systems include backscatter lidars to study atmospheric aerosols, Doppler lidar systems to measure wind fields, and Raman lidars to study ...
Lidar monitoring of the gaseous molecules in atmosphere can be used for concentration measurements of the toxic pollutants in air of the urban and industrial regions. Such a concentration study in the multi-components gaseous mixture by lidar technique is a complex problem in atmospheric pollution monitoring. The differential ...
Airborne UV Differential Absorption Lidar (DIAL): Measuring Ozone and Aerosols in the Atmosphere. Figure 1: The Electromagnetic Spectrum The ozone hole ...
Sep 9, 2011 ... DIAL Ops. The NASA Langley airborne Differential Absorption Lidar (DIAL) uses ultraviolet (UV) DIAL wavelengths of 288 and 300 nm for the ...
The development of a differential absorption lidar (DIAL) system in the mid-IR region for the detection and monitoring of light hydrocarbons is presented. Two lithium niobate optical parametric oscillators provided the signal and reference wavelengths. With the aid of a retroreflector, the system detected 0.63 ppm ...
... PL-TR-94-2044 MOLECULAR NITROGEN FLUORESCENCE LIDAR FOR ... mobile lidar system at the HIPAS observatory in Alaska. 2 LIF Lidar ...
Sep 9, 2010 ... Cloud Physics Lidar Home Page ... The Cloud Physics Lidar is an airborne lidar system designed specifically for studying clouds and aerosols ...
Change Analysis Lidar Vegetation Delineation Predicting Vegetation Presence using Lidar Coral Reef Applications Lidar Rugosity Mapping NPS Benthic Mapping Protocol Barrier Island...
Science.gov Websites
The ability of a Differential Absorption Lidar (DIAL) system to measure vertical profiles of H2O in the lower atmosphere was demonstrated both in ground-based and airborne experiments. In these experiments, tunable lasers were used that required real-time experimenter control to locate and lock onto the atmospheric H2O ...
Measurements of lower stratospheric ozone in the Tropics using electrochemical concentrations cell (ECC) sondes and the airborne UV Differential Absorption Lidar (DIAL) system after the eruption of Mt. Pinatubo are compared with the Stratospheric Aerosol ...
An analysis of two sets of atmospheric optical and supporting meteorological data has been performed. The first data set was taken by an airborne differential absorption lidar (DIAL) system. From this data set, vertical water vapor density profiles were e...
This report is the third annual progress report on research into methods for remote measurement of air pollutants. The major thrust was toward establishing differential-absorption -lidar (DIAL) capabilities in the infrared. The first infrared DIAL system ...
A differential-absorption lidar system has been developed which uses a continuously tunable (1.5-2.3
Summarized here are the results of airborne water vapor measurements in the lower middle and upper troposphere using the Differential Absorption Lidar (DIAL) technique in the near infrared. The measurements were performed in July 1990 in Southern Bavaria ...
Air pollution problem in the Czech Republic is very complex due to large number of factors as turbulent dispersion and chemical reactions concurring in the status of the PBL. For this 3D distribution of pollutants is a key information that cannot be given by conventional monitoring stations. Combined use of DIAL lidar and sodar can give access to such information. Case studies ...
A high-performance airborne water vapor differential absorption lidar has been developed during the past years. This system uses a four-wavelength/three-absorption line measurement scheme in the 935 nm H2O absorption band to cover the whole troposphere and lower stratosphere simultaneously. ...
Remote detection of chemicals using LIDAR (Light Detection and Ranging) utilizing DIAL (Differential Absorption LIDAR) is now a standard detection technique for both military and civilian activities. We have developed a novel nonlinear optical phase conjugation system that can reduce the effects of speckle noise ...
DOE Information Bridge
In the present work, a picosecond lidar system aiming at single-ended combustion diagnostics in full-scale combustion devices with limited optical access, such as power plants, is described. The highest overall range resolution of the system was found to be <0.5 cm. A demonstration has been made in a nonsooty and sooty Bunsen burner ...
An Observing System Simulation Experiment (OSSE) was conducted to study the impact of airborne lidar
The Airborne Oceanographic Lidar (AOL), a spatially scanning range-gated device installed on board a
Shuttle lidar measurements of magnesium-ion (Mg+) number density in the ionosphere (80-500 km) have been numerically simulated. A set of recently defined system parameters are used to assess the system performance. These simulations take into account the saturation effect of atomic absorption due to the high ...
The GSFC pressure-temperature lidar is a differential absorption lidar operating in the oxygen A band absorption region (760 to 770 nm), and utilizes two tunable pulsed alexandrite lasers. For obtaining temperature measurements with an accuracy of less th...
The final optical design for a space-borne light detection and ranging (lidar) mission is presented, in response to the European Space Agency ``Advanced lidar concepts'' proposal for use of a differential absorption lidar system to measure water vapor distribution in atmosphere at 935.5 nm. The ...
An airborne high spectral resolution lidar (HSRL) based on an iodine absorption filter and a high-power frequency-doubled Nd:YAG laser has been developed to measure backscatter and extinction coefficients of aerosols and clouds. The instrument was operated aboard the Falcon 20 research aircraft of the German Aerospace Center (DLR) during the Saharan ...
including phytoplankton carbon biomass and physiology ... Characterization of algal absorption spectra, since physiology is best ...
