Computer Science
Scientific paper
Mar 1996
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1996lpi....27.1017p&link_type=abstract
Lunar and Planetary Science, volume 27, page 1017
Computer Science
Gravity, Planets: Accretion, Venus
Scientific paper
We are pursuing the development of a high resolution gravity field model for Venus using all of the available Doppler tracking data from the Pioneer Venus Orbiter (PVO) and Magellan missions. A previous investigation produced the GVM-1 (Goddard Venus Model-1) gravity model, a 50th degree and order spherical harmonic representation computed using data collected in the early phase of the PVO mission (1979-1982). Here we present our progress in the development of an improved model complete to degree and order 90, to be generated with the addition of Magellan tracking data to the PVO data set. Our preliminary results show significant improvements in gravity field resolution with the inclusion of the higher precision Magellan data, primarily due to its more complete geographical coverage at low altitudes. We also investigate the application of an eigenvalue analysis solution method which enables the estimation of global high degree and order gravity coefficients without the usual application of a priori constraints.
Lemoine Frank G.
Nerem Steven R.
Perini J. P.
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