Other
Scientific paper
May 2002
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2002agusm.p21a..07c&link_type=abstract
American Geophysical Union, Spring Meeting 2002, abstract #P21A-07
Other
5417 Gravitational Fields (1227), 5450 Orbital And Rotational Dynamics, 6295 Venus, 1227 Planetary Geodesy And Gravity (5420, 5714, 6019), 1241 Satellite Orbits
Scientific paper
The Magellan tracking data from Cycles 4, 5, and 6 (September, 1992-October, 1994), and Pioneer Venus Orbiter tracking from 1978-1982 has been combined to develop gravitational field models of Venus complete up to spherical harmonic degree and order 180. The recovered solution is accompanied by a covariance matrix that is complete to the same degree. The X and S band Magellan and S band PVO tracking data has been processed in multiple day arcs, using enhanced nonconservative force modeling, including form models for the variation on the coefficient of drag as a function of orientation with respect to the spacecraft velocity direction. The resulting potential coefficient models and other solution parameters including the K2 Love number, periodic variations in rotation, and planetary orientation will be presented. Also presented will be examples of the dependency of the recovered K2 value with the assumed reflective properties of the spacecraft.
Beall James
Cox Christopher M.
Lemoine Frank G.
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