Mars gravity field - Combined Viking and Mariner 9 results

Details Mars gravity field - Combined Viking and Mariner 9 results Mars gravity field - Combined Viking and Mariner 9 results

Sep 1977

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1977jgr....82.4325g&link_type=abstract

Journal of Geophysical Research, vol. 82, Sept. 30, 1977, p. 4325-4327.

Physics

5

Gravitational Fields, Mars Probes, Planetary Gravitation, Mariner 9 Space Probe, Remote Sensors, Viking Orbiter Spacecraft

Scientific paper

A Martian gravity field of sixth degree and order has been determined from an analysis of a combination of Viking and Mariner 9 spacecraft Doppler tracking data. A short-arc technique utilizing approximately 4 hours of data centered at periapsis was used, and the data covered 16 arcs from Mariner 9 and 17 arcs from the Viking orbiters. The data were selected so as to obtain a uniform distribution of periapsis longitudes over the surface of Mars, and both S band and X band data were used where possible to eliminate charged particle effects. Inclusion of the Viking data arcs altered the Martian geoid features, as defined by previous short-arc analysis techniques of Mariner 9 data, by about 80 m in the southern hemisphere and about 140 m in the northern hemisphere.

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