Physics
Scientific paper
Mar 1974
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1974p%26ss...22..391w&link_type=abstract
Planetary and Space Science, Volume 22, Issue 3, p. 391-402.
Physics
Scientific paper
Cosmos 359 rocket 1970-65D, was launched on 22 August 1970 into an orbit inclined at 51.2° to the Equator, with an initial perigee height of 209 km: it decayed on 6 October 1971 after a lifetime of 410 days. The orbit has been determined at 42 epochs during the lifetime, using the RAE orbit refinement program, PROP, with over 2600 observations. Observations from the Hewitt cameras at Malvern and Edinburgh were available for 10 of the 42 orbits. Ten values of density scale height, at heights between 185 and 261 km, have been determined from analysis of the variations in perigee height. Upper-atmosphere zonal winds and 15th-order harmonics in the geopotential have been evaluated from the changes in orbital inclination. The average atmospheric rotation rate, for heights near 220 km, is found to be 1.04 rev/day; but there are striking departures from the average, with well-established values of 1.30, 0.75, 1.35 and 0.95 over four successive 75-day intervals. The changes in inclination at the 15th-order resonance in November 1970 give values of lumped 15th-order harmonics, which will provide equations for evaluating coefficients of order 15 and even degree (16,18,...) and also show that useful results on the geopotential can be obtained from satellites with perigee as low as 200 km.
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