Accession Number : ADA193366

Title :   Components of an Atmospheric Lidar System.

Descriptive Note : Final rept. 1 Oct 86-30 Sep 87,

Corporate Author : UNIVERSITY COLL LONDON (ENGLAND) DEPT OF PHYSICS AND ASTRONOMY

Personal Author(s) : Rees, David

Report Date : 30 NOV 1987

Pagination or Media Count : 16

Abstract : A wavelength meter and a doppler interferometric detector were developed to use with a lidar for measurements of atmospheric temperature and wind. These high spectral resolution instruments are used to measure the laser output line width and the backscatter wavelength shift. The sodium resonance lines are used to measure atmospheric structure properties in the 80 to 110 km altitude range. In this region, meteoric debris enters the earths upper atmosphere and forms a layer of dust with many species in atomic form. Sodium resonance line components can be used to find the temperature from line broadening and the doppler velocity can be measured to measure the wind. The instruments which have been prepared are to assist in that research development. Keywords: Interferometers; Sodium resonance; Atmospheric structure properties.

Descriptors :   *ATMOSPHERIC TEMPERATURE, *OPTICAL RADAR, *UPPER ATMOSPHERE, *ATMOSPHERIC SOUNDING, BACKSCATTERING, DEBRIS, DETECTORS, DUST, FREQUENCY, INTERFEROMETERS, INTERFEROMETRY, LASERS, LAYERS, LINE SPECTRA, MEASURING INSTRUMENTS, METEORS, OUTPUT, SHIFTING, SODIUM, VELOCITY, WIDTH, WINGS, RESONANCE RADIATION, DOPPLER EFFECT.

Subject Categories : Infrared Detection and Detectors
      Atmospheric Physics

Distribution Statement : APPROVED FOR PUBLIC RELEASE