Dec 1997
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1997jgr...10228673z&link_type=abstract
Journal of Geophysical Research, Volume 102, Issue E12, p. 28673-28686
Other
36
Planetology: Solid Surface Planets: Gravitational Fields, Geodesy And Gravity: Planetary Geodesy And Gravity, Planetology: Solid Surface Planets: Tectonics
Scientific paper
The significant power in the Martian gravitational field due to the Tharsis rise may mask or modify gravitational signatures that contain important information on Martian geophysical processes. In order to isolate gravity signals in regions where the field is significantly affected by Tharsis as well to investigate characteristics of the global field, we present a numerical technique to ``remove'' Tharsis from the Martian gravitational field. Our analysis will show that to first order Tharsis can be represented as a sixth-degree spherical harmonic zonal gravitational feature in a reference frame in which the axis of symmetry runs through the center of the province. We produced the ``Mars without Tharsis'' (MWT) field by subtracting the gravitational signature of Tharsis from the full field and rotating the spherical harmonics back to the original coordinate system, in which the z-axis is coincident with the planetary rotation axis. Our study yields limits on the moment of inertia factor of 0.361
Smith David E.
Zuber Maria T.
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