Orbit determination and analysis for Cosmos 482 from 1978 to 1981

Details Orbit determination and analysis for Cosmos 482 from 1978 to 1981 Orbit determination and analysis for Cosmos 482 from 1978 to 1981

Oct 1985

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1985p%26ss...33.1125k&link_type=abstract

Planetary and Space Science (ISSN 0032-0633), vol. 33, Oct. 1985, p. 1125-1143.

Statistics

Computation

4

Cosmos Satellites, Orbit Calculation, Perigees, Satellite Orbits, Solar Radiation, Computer Programs, Orbit Decay, Orbit Perturbation, Tables (Data)

Scientific paper

The orbit of the satellite Cosmos 482 (1972-23A) has been determined at 77 epochs between November 8, 1977 and April 18, 1981 from 5650 optical and radar observations. The computations were made with the RAE orbit determination program PROP6, and an average accuracy of 150 m radial and cross-track was achieved. Cosmos 482 was a high-drag satellite in an eccentric orbit and, between the first epoch and the last, the orbital period decreased from 157 to 94 min, the eccentricity decreased from 0.32 to 0.04, and the orbital inclination decreased from 52.14 deg to 51.95 deg due to the transverse forces caused by atmospheric rotation. The orbit was therefore ideal for determining the atmospheric rotation rate from the decrease in inclination, and seven accurate values of rotation rate have been obtained. The new values strengthen the existing overall picture of upper-atmosphere winds, and are generally in good accord with the previous results. An improved equation has been derived for calculating density scale height H from the decrease in perigee distance, and has been applied to determine seven values of H. The corresponding values of H from the COSPAR International Reference Atmosphere are on average 5 percent lower than the observational values, for 1980-81.

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