Gravity Field of Venus: A Preliminary Analysis

@article{Phillips1979GravityFO,
  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},
  journal={Science},
  year={1979},
  volume={205},
  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… 
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