Mars - Hellas Planitia gravity analysis

Details Mars - Hellas Planitia gravity analysis Mars - Hellas Planitia gravity analysis

Feb 1981

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1981icar...45..331s&link_type=abstract

Icarus, vol. 45, Feb. 1981, p. 331-338.

Astronomy and Astrophysics

Astronomy

24

Astronomical Models, Gravity Anomalies, Mars Surface, Planetary Structure, Radio Tracking, Computer Techniques, Gravitational Effects, Isostatic Pressure, Least Squares Method, Optimization, Orbital Maneuvers, Viking Orbiter 1, Mars, Hellas Planitia, Gravity, Doppler Observations, Viking 1 Orbiter, Isostasy, Models, Theoretical Studies, Depth, Mass, Data, Thickness, Data Reduction, Maps, Gravity Fields, Structure, Density, Compensation

Scientific paper

Doppler radio tracking data from Viking Orbiter 1 has provided new detailed observations of gravity variations over Hellas Planitia. Line-of-sight Bouguer gravity definitely indicates that isostatic adjustment has occurred. Two theoretical models were tested to obtain fits to the gravity data. Results for a surface deficit model, and a model with a surface deficit and a mass excess at depth are displayed. The mass-at-depth model produced very marked improvement in the data fit as compared to the surface deficit model. The optimum depth for the mass excess is 130 km.

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