Other
Scientific paper
Jun 1976
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1976p%26ss...24..529b&link_type=abstract
Planetary and Space Science, vol. 24, June 1976, p. 529-539.
Other
1
Atmospheric Circulation, Exosphere, Explorer 24 Satellite, Gravitational Effects, Satellite Orbits, Diurnal Variations, Geopotential, Lunar Gravitational Effects, Radiation Effects, Radiation Pressure, Solar Radiation, Time Dependence
Scientific paper
Data on the variation of the orbital inclination of the balloon satellite Explorer 24 have been used to determine zonal winds between 540 and 620 km. In this height region, the effect of zonal winds on the orbital inclination may become very small compared with other perturbations, such as accelerations due to the geopotential, lunisolar gravitation, and the solar radiation pressure. It is demonstrated that the solar radiation pressure may become the most significant force changing the orbital inclination. The diurnal mean zonal winds derived from Explorer 24 point to an exospheric rotation rate which is about 6-10% less than the rotation rate of the earth in the analyzed height region. Since the possible errors of the data analysis are of a similar order of magnitude, it can not be excluded that the exosphere corotates with the earth. Furthermore, a local time dependence of the zonal winds could be detected. The diurnal variation of the zonal wind is shown to be in good agreement with the theoretical model of Blum and Harris (1975). The present results are discussed and compared with all previous investigations of orbital inclination changes of satellites above 350 km.
Blum Peter W.
Schuchardt G. H. K.
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