Computer Science – Sound
Scientific paper
Oct 1975
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1975p%26ss...23.1369h&link_type=abstract
Planetary and Space Science, vol. 23, Oct. 1975, p. 1369-1376.
Computer Science
Sound
1
Angular Velocity, Atmospheric Circulation, Cosmos Satellites, Orbital Elements, Satellite Observation, Upper Atmosphere, Atmospheric Density, Computer Programs, Curve Fitting, Inclination, Perigees, Root-Mean-Square Errors, Rotating Fluids, Satellite Orbits, Satellite Perturbation, Sounding Rockets, Tables (Data)
Scientific paper
Cosmos 378 rocket, 1970-97B, entered orbit on Nov. 17, 1970, with orbital inclination 74.0 deg, period 105 min, and perigee height 230 km, and decayed on Sept. 30, 1972 after 683 days in orbit. The RAE computer program PROP was used, with more than 1900 observations from 64 stations, to determine the orbit at 39 epochs between February 1971 and September 1972. The main aim of the analysis was to determine the atmospheric rotation rate from the decrease in orbital inclination. After removal of relevant perturbations, analysis of the variation in inclination between July 1971 and April 1972 yields the surprisingly low average atmospheric rotation rate of 0.75 plus or minus 0.05 rev/day, at a mean height of 250 km. The local time at perigee is however strongly biased towards daytime values (07-16 hr), so the results lend support to the picture of east-to-west winds by day and west-to-east winds by night.
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