Physics
Scientific paper
May 1983
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1983rspsa.387..187w&link_type=abstract
Royal Society (London), Proceedings, Series A - Mathematical and Physical Sciences (ISSN 0080-4630), vol. 387, no. 1792, May 9,
Physics
5
Orbit Calculation, Orbit Decay, Orbital Elements, Skylab 1, Spacecraft Orbits, Aerodynamic Drag, Atmospheric Density, Atmospheric Effects, Circular Orbits, Earth Rotation, Geopotential, Orbit Perturbation, Perigees, Resonance
Scientific paper
The orbit of Skylab 1 has been determined from some 1400 observations during the 14 days before its decay. The orbital parameters are described, and the variations in inclination due to atmospheric rotation and 16th-order resonance with the geopotential are analyzed. Thirteen values of the air density, at heights from 252 km down to 179 km, are determined from the daily changes in the semimajor axis. Analysis of the variations of eccentricity and argument of perigee show that the variations are in full accord with the theory for an atmosphere with day-to-night variation in density, with the perigee progressing toward the point of minimum density. The remaining orbital elements, the semimajor axis, the right ascension of the ascending node, and the orbital decay rate are presented.
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