The determination of relative effective atmospheric densities at 800 km using Seasat laser range data

Details The determination of relative effective atmospheric densities at 800 km using Seasat laser range data The determination of relative effective atmospheric densities at 800 km using Seasat laser range data

Nov 1989

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1989p%26ss...37.1409r&link_type=abstract

Planetary and Space Science (ISSN 0032-0633), vol. 37, Nov. 1989, p. 1409-1420. Research supported by SERC.

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Atmospheric Density, Drag Coefficients, Laser Applications, Satellite Orbits, Seasat Satellites, Upper Atmosphere, Orbit Perturbation, Radiation Pressure, Solar Radiation

Scientific paper

A method to determine relative effective atmospheric densities from variations within the recovered drag coefficients of long-arc orbits is presented. Application to Seasat laser range data yields relative densities at heights near 800 km over daily intervals. For moderate levels of the base density (solar flux of about 150 x 10 to the -22nd W m sq/Hz), along-track gravity field and solar radiation pressure errors are shown to have little effect on the derived values. A constant scale error in the solar radiation pressure model has little effect for any level of the base density. Observed densities during a period of intense geomagnetic activity establish that, in general, thermospheric models underestimate the atmospheric response at heights near 800 km. By deriving observed and modeled density profiles, it is possible to predict where a good orbital fit with a single drag scale factor can occur.

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