Computer Science
Scientific paper
Apr 1980
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1980rspta.296..597k&link_type=abstract
Royal Society (London), Philosophical Transactions, Series A, vol. 296, no. 1426, Apr. 18, 1980, p. 597-637.
Computer Science
Orbital Elements, Rocket Flight, Skylab 1, Spacecraft Orbits, Trajectory Analysis, Eccentricity, Inclination, Orbit Decay, Orbital Position Estimation, Perigees, Resonance, Satellite Drag
Scientific paper
The paper analyzes Skylab 1 rocket orbit and describes the geopotential resonance, atmospheric rotation, and variations in eccentricity due to drag. The final stage rocket which projected Skylab into orbit itself entered a nearly circular orbit which was determined at 62 epochs, with the orbital accuracy in perigee height and orbital inclination of 90 km. As the orbit contracted under influence of air drag, it passed slowly through the 31:2 geopotential resonance, when the track over the earth repeats every 31 revolutions at intervals of 2 days. The variations in inclination and eccentricity during the resonance phase were analyzed to determine the atmospheric rotation rate; the eccentricity variations were compared with the predicted values for orbit contraction in an atmosphere with a strong day-to-night variation in density.
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