Computer Science – Sound
Scientific paper
Mar 1981
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1981jgr....86.1313r&link_type=abstract
Journal of Geophysical Research, vol. 86, Mar. 1, 1981, p. 1313-1324. Research supported by the U.S. Defense Nuclear Agency.
Computer Science
Sound
25
Auroras, Infrared Spectra, Nitric Oxide, Spectrum Analysis, Atomic Collisions, Electron Transitions, Molecular Excitation, Reaction Kinetics, Rocket Sounding
Scientific paper
The high resolution NO emission data obtained in an aurora between 100 and 125 km by the HIRIS cryogenic interferometer spectrometer are analyzed by a spectral simulation technique. The resulting vibrational population distributions exhibit a bimodal behavior that indicates the presence of at least two competing excitation mechanisms. The results can be qualitatively interpreted in terms of the excitation of level v = 1 by collisions between atomic oxygen and aurorally enhanced NO, and the excitation of at least the first six vibrational levels by an auroral mechanism in which NO(v) is formed from the reaction of N(2D) with O2. The N(2D) mechanism is found to be responsible for 70-90% of the observed fundamental band intensity.
Caledonia George E.
Gibson James J.
Rawlins Wilson T.
Stair T. Jr. A.
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