Computer Science
Scientific paper
Sep 1981
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1981p%26ss...29..989h&link_type=abstract
Planetary and Space Science, vol. 29, Sept. 1981, p. 989-998. Research sponsored by the Science Research Council.
Computer Science
3
Ariel 1 Satellite, Atmospheric Circulation, Atmospheric Density, Orbital Elements, Rotating Fluids, Satellite Perturbation, Diurnal Variations, Eccentricity, Inclination, Perigees, Wind Effects
Scientific paper
The final thousand day period of the orbit of Ariel 1 (1902-15A) is determined at 26 epochs using the RAE orbital refinement program PROP 6, as well as all available (over 1700) optical and radar observations. Temporal changes in the inclination and perigee height were used to calculate values of the atmospheric rotation rate, rev/day, and the density scale height for a height band 250-420 km. Atmospheric rotation rates were calculated as: (1) 0.9 at a mean height of 375 km for average conditions; (2) 1.25 at a mean height of 340 km for the evening bias; and (3) 0.75 at a mean height of 270 km for morning and summer conditions. Fourteen values of the density scale height were obtained, by consideration of the decrease in perigee height in an oblate atmosphere with a day-to-night variation in density. Comparison with CIRA 1972 shows a general agreement to within 10%.
Holland Dominic
Moore Patrick
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