Physics
Scientific paper
Jul 1980
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1980jgr....85.3396y&link_type=abstract
Journal of Geophysical Research, vol. 85, July 1, 1980, p. 3396-3400
Physics
10
Atmospheric Composition, Fabry-Perot Interferometers, Oxygen Atoms, Solar Corona, Thermosphere, Brightness, Emission Spectra, Line Spectra, Near Infrared Radiation, Oxygen Ions, Solar Temperature, Twilight Glow
Scientific paper
A series of twilight interferometric observations of the near infrared O(+)(2P) doublets at 7320 and 7330 A between April 1979 and October 1979 detected excessive amounts of emission at shadow heights above 550 km. The scale height deduced from the vertical brightness profile determined from data taken on September 26, 1979, when the 10.7-cm flux was 231, showed a marked increase above 550 km. The equivalent temperature was estimated to be 4000 K or higher. Observations of the emission line shape with the high-resolution capability of the interferometer substantiated these results by a very apparent progressive broadening of the emission profile between times of low and high shadow height. It is concluded from these results that there exists an atomic oxygen corona overlying the thermosphere during the solar maximum period.
Hays Paul B.
Meriwether W. Jr. J.
Yee Jae Hyung
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