Computer Science
Scientific paper
Mar 1983
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1983p%26ss...31..303a&link_type=abstract
Planetary and Space Science (ISSN 0032-0633), vol. 31, March 1983, p. 303-310.
Computer Science
17
Atmospheric Scattering, Thermosphere, Wind Measurement, Atmospheric Models, Brightness, Doppler Effect, Fabry-Perot Interferometers, Wind Profiles
Scientific paper
Convergent or divergent thermospheric wind patterns detected by ground-based Fabry-Perot interferometric measurements of the Doppler shifts of atomic lines are demonstrated to occur in the presence of strong intensity gradients and a scattering atmosphere. Consideration is given to the color shifts observed when sighting to the north or the south, and a numerical model is developed to describe the wind patterns which produce the recorded shifts. An account is taken of the direct and scattered components of the brightness, with the atmosphere treated as a single scattering layer with a reflecting surface underneath. A scattering coefficient is calculated, together with the line shape of the wavelength shifts. The scattered light is demonstrated, both through simulations and measurements taken near Calgary, Alberta, to produce convergence or divergence of the color shifts, depending on the line-of-sight of the viewing.
Abreu Vincent J.
Cogger Leroy L.
Hays Paul B.
Meriwether W. Jr. J.
Schmitt G. A.
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