Analysis of thermospheric dayglow spectra from the Spacelab 1 shuttle mission
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Author
Bosserman, James Lee
Date
1989-12Advisor
Cleary, David D.
Second Reader
Gnanalingam, Suntharalingam
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Show full item recordAbstract
Lower thermospheric airglow spectra in the wavelength range of 1840 A to
2280 A were analyzed. These data were obtained by the Spacelab 1 shuttle
mission in November, 1983. The analysis of the seven spectra was accomplished
by comparison of the data with synthetically calculated spectra for the gamma,
delta, and epsilon band emissions of nitric oxide. The tangent ray heights of the
measured spectra varied in two kilometer increments from 96 km to 108 km. The
strengths of 31 of the most prominent 7, 6, and e band emissions were
independently adjusted to achieve the best fits to the data. All of the major
features in the data were identified and gave conclusive evidence of the existence
of c band emissions. By fitting the double bandhead feature of the emissions, the
atmospheric temperature was determined for the first time from the NO emissions
and compared with the temperature profile predicted by the MSIS—83 model. The
Frank—Condon factors for the v" progression (v'=0) of the nitric oxide e band
were measured from the data and compared with theoretical calculations. The
fluorescence efficiency of the 6 bands was determined to be 0.32 ± 0.05 by fitting
the 6 (0,1) emission feature. Finally, a discrepancy between the observed and
calculated relative intensities of the two sub—bands for the 7 and 1 bands was
found.
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