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Proceedings Paper

Retrieval of the nighttime thermospheric temperature from NO(v=1) 5.3-um infrared emission
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Paper Abstract

Classical trajectory calculations have been performed to determine the rotational distribution of vibrationally excited nitric oxide from collisions with atomic oxygen. The reaction occurs on two electronic potential energy surfaces which must be considered for a realistic description of the O+NO collision dynamics. The results, which have been statistically averaged over both electronic potential energy surfaces, are in good agreement with the available experimental data for vibrational relaxation of NO(v less than or equal to 9), as well as the temperature dependence of NO(v equals 1). The state-to-state relaxation rate coefficients involve the formation of long-lived collision complexes and indicate statistical behavior in O+NO collisions. The present study confirms earlier analysis that the NO(v equals 1) rotational distributions can indeed by described by a Maxwell-Boltzmann distribution, albeit with a rotational temperature of approximately 75% of the initial translational temperature. Thus, it appears possible to establish a lower bound to, and an estimate of, the nighttime quiescent terrestrial thermosphere by measuring the rotational envelope of the 5.3 micrometer emission from NO.

Paper Details

Date Published: 1 January 1997
PDF: 7 pages
Proc. SPIE 3220, Satellite Remote Sensing of Clouds and the Atmosphere II, (1 January 1997); doi: 10.1117/12.301154
Show Author Affiliations
James W. Duff, Spectral Sciences, Inc. (United States)
Ramesh D. Sharma, Air Force Phillips Lab. (United States)

Published in SPIE Proceedings Vol. 3220:
Satellite Remote Sensing of Clouds and the Atmosphere II
Joanna D. Haigh, Editor(s)

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