Gravity Field of Venus: A Preliminary Analysis

  title={Gravity Field of Venus: A Preliminary Analysis},
  author={Roger J. Phillips and William L. Sjogren and Elsa A. Abbott and John C. Smith and R. N. Wimberly and Carl A. Wagner},
  pages={93 - 96}
The line-of-sight gravity field for Venus has been mapped by tracking the Pioneer Venus spacecraft in the vicinity of periapsis for a 45� swath of longitude eastward of 294�. There are consistent and systematic variations in the gravity signature from orbit to orbit, attesting to the reality of observed anomalies. Orbit 93 passes over a large positive topographic feature, the "northern plateau," for which there is no corresponding gravity signature. If this region has no isostatic compensation… 
18 Citations
A low-order global gravity field of Venus and dynamical implications
An estimate of sixth-degree and sixth-order harmonic coefficients of the global gravity field of Venus is obtained by processing the long periodic variations of the mean orbital elements of the
Gravity anomalies on Venus
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Gravity anomalies, compensation mechanisms, and the geodynamics of Western Ishtar Terra, Venus
Pioneer Venus line-of-sight orbital accelerations have been used to calculate the geoid and vertical gravity anomalies for western Ishtar Terra on various planes of altitude Z0. The apparent depth of
High‐resolution gravity model of Venus
The anomalous gravity field of Venus shows high correlation with surface features revealed by radar. We extract gravity models from the Doppler tracking data from the Pioneer Venus Orbiter (PVO) by
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We present a review of the long-wavelength gravity fields of the terrestrial planets, earth, moon, Mars, and Venus with particular emphasis placed on the interrelationship between gravity anomalies
Elastic thickness of the Venus lithosphere estimated from topography and gravity
The very close correlation observed on Venus between topography and gravity on a regional scale is clearly related to the isostatic compensation of the topographic loads. Observed gravity anomalies
Pioneer Venus Radar results: Geology from images and altimetry
Altimetry and radar image data obtained by the Pioneer Venus spacecraft and earth-based radars have provided a first look at the global distribution of topographic relief, regional morphology, and
Isostatic compensation of equatorial highlands on Venus
Abstract Spherical harmonic models for Venus' global topography and gravity incorporating Magellan data are used to test isostatic compensation models in five 30° × 30° regions representative of the
On Venus impact basins: Viscous relaxation of topographic relief
The question of whether impact basins dating from the time of heavy bombardment of the inner solar system are preserved on the surface of Venus is of paramount importance for an understanding of the


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Recent reductions of Apollo subsatellite and Lunar Orbiter 5 data have determined the first plausible models for the fatside lunar gravity field. This paper presents a selenodesy method which
Venus: Preliminary Topographic and Surface Imaging Results from the Pioneer Orbiter
A first radar-scattering image, compiled from data obtained by the Pioneer Venus radar mapper in its imaging mode, shows a region north of the equator; several circular depressions seen in this area may result from meteoritic impact.
Gravity anomalies, regional elevation, and the deep structure of the North Atlantic
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Estimation of Local Lunar Gravity Features
A quantitative estimate of the gravity features on the near surface of the moon has been obtained by iteratively constructing a mass density model to improve the agreement between actual Doppler
Lateral density anomalies in the upper mantle
The observed power spectrum of the earth's gravity field is interpreted as resulting from randomly distributed density anomalies of relatively small spatial coherence occurring throughout at least
Mars Gravity: High-Resolution Results from Viking Orbiter 2
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, revealing a huge anomaly associated with Olympus Mons, a mascon in Isidis Planitia, and other anomalies correlated with volcanic structure.
Mascons: Lunar Mass Concentrations
Lunar Orbiter tracking data have been processed to supply a qualitatively consistent gravimetric map of the lunar nearside and the results indicate that there are large mass concentrations under the lunar ringed maria.
New Radar Image of Venus
A new radar image of Venus covering the latitude range 46� to 75� and the approximate longitude range 290� to 10� is shown. The resolution is approximately 20 kilometers.
Jacobson and the Pioneer Venus Navigation Team are supplying the mean elements. The estimation technique is discussed by
  • J. Geophys. Res
  • 1979
Jacobson and the Pioneer Venus Navigation Team are supplying the mean elements . The estimation technique is discussed by A . J . Ferrari and M . P . Ananda [
  • J . Geophys . Res .