Hot oxygen geocorona as inferred from neutral exospheric models and mass spectrometer measurements

Details Hot oxygen geocorona as inferred from neutral exospheric models and mass spectrometer measurements Hot oxygen geocorona as inferred from neutral exospheric models and mass spectrometer measurements

May 1989

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1989jgr....94.5523h&link_type=abstract

Journal of Geophysical Research (ISSN 0148-0227), vol. 94, May 1, 1989, p. 5523-5529.

Physics

19

Atmospheric Models, Exosphere, Geocoronal Emissions, Mass Spectroscopy, Oxygen, Atmospheric Density, Dynamics Explorer 2 Satellite, Gas Density, Solar Activity, Summer

Scientific paper

Summer hot oxygen densities of 10,000-30,000 per cubic cm at 1100 km (or 100,000-300,000 at 550 km) for low to moderate solar activities are inferred from differences between satellite drag and mass-spectrometer-based models. At high solar activities, densities at 925 km from 100,000-400,000 (or 5 x 10 to the 5th to 2 x 10 to the 6th at 550 km) are inferred from a limited number of Dynamics Explorer mass spectrometer measurements. The densities are of the same order as those reported previously from ground-based optical measurements. It is pointed out that a detailed theoretical calculation of the hot oxygen distribution consistent with the cool populations in mass-spectrometer-based models would provide the basis for a more complete interpretation of mass spectrometer data and of high-altitude differences between drag-based and mass-spectrometer-based models. It is concluded that hot oxygen could be providing the major contribution to satellite drag in the summer lower exosphere during low solar activity.

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