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A 40th deg and order gravitational field model for MarsUnderstanding the origin and evolution of major photographic features on Mars, such as the hemispheric dichotomy and Tharsis rise, will require improved resolution of that planet's gravitational and topographic fields. The highest resolution gravity model for Mars published to date was derived from Doppler tracking data from the Mariner 9 and Viking 1 and 2 spacecraft, and is of 18th degree and order. That field has a maximum spatial resolution of approx. 600 km, which is comparable to that of the best topographic model. The resolution of previous gravity models was limited not by data density, but rather by the computational resources available at the time. Because this restriction is no longer a limitation, the Viking and Mariner data sets were reanalyzed and a gravitational field was derived complete to the 40th degree and order with a corresponding maximum spatial resolution of 300 km where the data permit.
Document ID
19920001542
Acquisition Source
Legacy CDMS
Document Type
Other
Authors
Zuber, M. T. (ST Systems Corp. Greenbelt, MD., United States)
Smith, D. E. (NASA Goddard Space Flight Center Greenbelt, MD, United States)
Lerch, F. J. (NASA Goddard Space Flight Center Greenbelt, MD, United States)
Nerem, R. S. (NASA Goddard Space Flight Center Greenbelt, MD, United States)
Patel, G. B. (NASA Goddard Space Flight Center Greenbelt, MD, United States)
Fricke, S. K. (RMS Technologies, Inc., Landover MD., United States)
Date Acquired
September 6, 2013
Publication Date
June 1, 1991
Publication Information
Publication: NASA, Washington, Reports of Planetary Geology and Geophysics Program, 1990
Subject Category
Lunar And Planetary Exploration
Accession Number
92N10760
Distribution Limits
Public
Copyright
Work of the US Gov. Public Use Permitted.

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