Atmospheric Densities and Temperatures from Precisely Reduced Observations of the Explorer IX Satellite

Details Atmospheric Densities and Temperatures from Precisely Reduced Observations of the Explorer IX Satellite Atmospheric Densities and Temperatures from Precisely Reduced Observations of the Explorer IX Satellite

Feb 1966

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1966saosr.199.....r&link_type=abstract

SAO Special Report #199 (1966)

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Scientific paper

The atmospheric drag of the Explorer 9 satellite through May 1963 was derived using precisely reduced photographs taken with the Baker-Nunn cameras. The accuracy of an individual acceleration was determined to be +/-5%. Analysis of the atmospheric-density data revealed a latitude-dependent seasonal density variation of +/-25% at a latitude of 39° and an average height of 690 km. The atmospheric density at a given height is higher in winter than in summer. The statistics of 100 atmospheric variations related to geomagnetic storms give 5.2 +/- 0.4 hours as the average time lag between the maximum of a geomagnetic storm and the peak in atmospheric density. The influence of the variation of the drag coefficient with atmospheric composition on the absolute density values is discussed.

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