An analysis of satellite observations of the O I EUV dayglow

Physics

Scientific paper

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Atmospheric Physics, Dayglow, Extreme Ultraviolet Radiation, Oxygen Atoms, Electron Impact, Photoelectrons, Radiative Transfer, Satellite Observation

Scientific paper

Observations of the latitudinal variation of the 1356-A, 1304-A, and 989-A O I earth dayglow, obtained with the USAF STP78-1 satellite at solar maximum on March 21, 1979, are reported and compared with the predictions of thermospheric models and published laboratory measurements of electron-impact excitation cross sections. The results are presented in extensive tables and graphs and characterized in detail, with particular attention to the 1304-A solar flux and the 989-A branching ratio. The STP78-1 data (as well as simultaneous AE-E satellite measurements ) are shown to indicate exospheric temperatures that were 220-240-K higher, but varied significantly less with latitude, than those predicted by the MSIS-83 model (Hedin, 1983) for the day of the observations.

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