Physics
Scientific paper
May 1976
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1976georl...3..273m&link_type=abstract
Geophysical Research Letters, vol. 3, May 1976, p. 273-276.
Physics
Atmospheric Temperature, Exosphere, Explorer 55 Satellite, Gas Temperature, Neutral Particles, Temperature Measurement, Data Reduction, Density Distribution, Mass Spectroscopy, Nitrogen, Oxygen Atoms, Scale Height
Scientific paper
The Atmosphere Explorer satellites (AE-C, -D, and -E) were initially placed into highly elliptical orbits with perigees around 140 km and apogees of 4000 km. As a result of such an orbital geometry, measurements of neutral constituents at high altitudes represent mainly vertical changes in densities. The influence of horizontal density gradients on measurements above 400 km is small. Under geomagnetically quiet conditions, the density profiles can be used to derive scale-height temperatures of the exosphere. The open-source neutral mass spectrometer (OSS) flown on all three AE-satellites measured neutral constituents such as N2, O, and N well above 400 km. The temperatures derived from scale heights show a good agreement among the constituents and the expected close correlation with the F10.7-cm solar flux. Satellites with highly elliptical orbits provide the opportunity to measure simultaneously both densities and temperatures.
Engebretson Mark J.
Kayser David C.
Mauersberger Konrad
Nier Alfred O.
Potter W. E.
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