Physics
Scientific paper
Aug 1976
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1976p%26ss...24..711b&link_type=abstract
Planetary and Space Science, vol. 24, Aug. 1976, p. 711-715.
Physics
2
Cosmos Satellites, Eccentricity, Orbit Calculation, Satellite Orbits, Geopotential, Gravitational Fields, Inclination, Orbital Elements, Perigees, Zonal Harmonics
Scientific paper
Cosmos 373, 1970-87 A, was launched on 20 October 1970 into an orbit inclined at 62.9 deg to the equator, with an initial perigee height of 472 km. The orbit has been determined at 25 epochs covering a period of just over 4 yr using the RAE orbit refinement program PROP, with over 1500 observations. Observations from the Hewitt camera at Malvern were available for all 25 orbits. The main purpose of the orbit determination was to provide accurate values of the eccentricity for use in determining the odd zonal harmonics in the earth's gravitational potential. The analysis has resulted in extremely accurate values of e with S.D.'s down to 0.000005 and has indicated an amplitude of the oscillation in eccentricity of 0.0085, equivalent to almost 60 km in perigee height - the largest yet recorded for any near-earth orbit of high accuracy.
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