Computer Science – Sound
Scientific paper
Oct 1984
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1984jgr....89.9080c&link_type=abstract
Journal of Geophysical Research (ISSN 0148-0227), vol. 89, Oct. 1, 1984, p. 9080-9088.
Computer Science
Sound
14
Airglow, Oxygen Spectra, Rocket Sounding, Twilight Glow, Ultraviolet Spectroscopy, Emission Spectra, Herzberg Bands, Nitric Oxide, Spectral Bands, Vertical Distribution
Scientific paper
Rocket-borne (Astrobee) UV measurements were made of the terrestrial airglow at morning twilight from 82 and 90 deg zenith angles at altitudes of 90 and 246 km in September 1979. Data were acquired on the NO gamma and delta bands, the 2470 A O II, 1356 A and the 1304 A O I lines, the Lyman-Berge-Hopfield N2 and the Herzberg 02 lines. The zodiacal contribution was substracted to obtain pure airglow data. Spectral analyses supported a larger nighttime decrease of N(4S) than for NO, the latter being in diffusive equilibrium above 190 km altitude. The NO gamma band was directly related to the thermospheric N(4S) contribution, the latter having a density of 2-8 million/cu cm at 200 km. Finally, self-consistent photoionization and photoelectron impact ionization models were derived for the atomic and ionic oxygen emissions.
Cebula Richard P.
Feldman Paul D.
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