Gravity anomalies on Venus

Doppler radio tracking of the Pioneer Venus orbiter has provided gravity measures over a significant portion of Venus. Feature resolution is approximately 300–1000 km within an area extending from 10°S to 40°N latitude and from 70°W to 130°E longitude (≈200°). Many anomalies were detected, and there is considerable correlation with radar altimetry topography (Pettengill et al., this issue). The amplitudes of the anomalies are relatively mild and similar to those on the earth at this resolution. Calculations for isostatic adjustment reveal that significant compensation has occurred.

[1]  P. Gottlieb.  Estimation of Local Lunar Gravity Features , 1970 .

[2]  R. Tolson,et al.  Venus Thermosphere and Exosphere: First Satellite Drag Measurements of an Extraterrestrial Atmosphere , 1979, Science.

[3]  T. D. Moyer.  Mathematical formulation of the Double Precision Orbit Determination Program /DPODP/ , 1971 .

[4]  A low-order global gravity field of Venus and dynamical implications , 1980 .

[5]  W. Sjogren,et al.  Simulation gravity modeling to spacecraft‐tracking data: Analysis and application , 1978 .

[6]  W. Sjogren.  Mars Gravity: High-Resolution Results from Viking Orbiter 2 , 1979, Science.

[7]  Francis J. Lerch,et al.  Gravity model improvement using GEOS 3 /GEM 9 and 10/. [and Seasat altimetry data] , 1977 .

[8]  W. Sjogren,et al.  Gravity Field of Venus: A Preliminary Analysis , 1979, Science.

[9]  D. G. King-Hele,et al.  Theory of satellite orbits in an atmosphere , 1964 .

[10]  G. Kron,et al.  The Mass and Dynamical Oblateness of Venus , 1969 .

[11]  H. T. Howard,et al.  Venus: Mass, Gravity Field, Atmosphere, and Ionosphere as Measured by the Mariner 10 Dual-Frequency Radio System , 1974, Science.

[12]  W. E. Kirhofer,et al.  Venus: Density of Upper Atmosphere from Measurements of Drag on Pioneer Orbiter , 1979, Science.

[13]  W. Sjogren,et al.  Mascons: Lunar Mass Concentrations , 1968, Science.

[14]  W. Sjogren,et al.  Lunar gravity via the Apollo 15 and 16 subsatellites , 1974 .

[15]  Eric M. Eliason,et al.  Pioneer Venus Radar results altimetry and surface properties , 1980 .

[16]  D. Muhleman,et al.  Polar heating and the shape of Venus , 1979, Nature.