Reports

Mars Gravity: High-Resolution Results from Viking Orbiter 2

Science  09 Mar 1979:
Vol. 203, Issue 4384, pp. 1006-1010
DOI: 10.1126/science.203.4384.1006

Abstract

Doppler radio-tracking data have provided detailed measurements for a martian gravity map extending from 30°S to 65°N in latitude and through 360° of longitude. The feature resolution is approximately 500 kilometers, revealing a huge anomaly associated with Olympus Mons, a mascon in Isidis Planitia, and other anomalies correlated with volcanic structure. Olympus Mons has been modeled with a 600-kilometer surface disk having a mass of 8.7 x 1021grams

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