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CO2 lidar for measurements of trace gases and wind velocitiesCO2 lidar systems technology and signal processing requirements relevant to measurement needs and sensitivity are discussed. Doppler processing is similar to microwave radar, with signal reception controlled by a computer capable of both direct and heterodyne operations. Trace gas concentrations have been obtained with the NASA DIAL system, and trace gas transport has been determined with Doppler lidar measurements for wind velocity and turbulence. High vertical resolution measurement of trace gases, wind velocity, and turbulence are most important in the planetary boundary layer and in regions between the PBL and the lower stratosphere. Shear measurements are critical for airport operational safety. A sensitivity analysis for heterodyne detection with the DIAL system and for short pulses using a Doppler lidar system is presented. The development of transient injection locking techniques, as well as frequency stability by reducing chirp and catalytic control of closed cycle CO2 laser chemistry, is described.
Document ID
19830041286
Acquisition Source
Legacy CDMS
Document Type
Conference Proceedings
Authors
Hess, R. V.
(NASA Langley Research Center Hampton, VA, United States)
Date Acquired
August 11, 2013
Publication Date
January 1, 1982
Subject Category
Instrumentation And Photography
Meeting Information
Meeting: Physics and technology of coherent infrared radar
Location: San Diego, CA
Start Date: August 25, 1981
End Date: August 26, 1981
Sponsors: USAF
Accession Number
83A22504
Distribution Limits
Public
Copyright
Other

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