Accuracy of Potential Coefficients Obtained from Present and Future Gravity Data

  1. Soren W. Henriksen,
  2. Armando Mancini and
  3. Bernard H. Chovitz
  1. Richard H. Rapp

Published Online: 15 MAR 2013

DOI: 10.1029/GM015p0151

The Use of Artificial Satellites for Geodesy

The Use of Artificial Satellites for Geodesy

How to Cite

Rapp, R. H. (1972) Accuracy of Potential Coefficients Obtained from Present and Future Gravity Data, in The Use of Artificial Satellites for Geodesy (eds S. W. Henriksen, A. Mancini and B. H. Chovitz), American Geophysical Union, Washington, D. C.. doi: 10.1029/GM015p0151

Author Information

  1. Department Of Geodetic Science Ohio State University, Columbus, Ohio 43210

Publication History

  1. Published Online: 15 MAR 2013
  2. Published Print: 1 JAN 1972

ISBN Information

Print ISBN: 9780875900155

Online ISBN: 9781118663646

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Keywords:

  • Gravity coverages;
  • Hemisphere solution;
  • Pellinen rule;
  • Satellite and terrestrial solutions;
  • Terrestrial gravity information

Summary

The accuracies of recent solutions of potential coefficients as determined from satellite and from terrestrial gravity data are compared. Certain terrestrial solutions are better than others. The determination of the potential coefficients from terrestrial gravity data is considered from the point of view of the variances of the coefficients and the correlation of the coefficients. Coefficients of degree n can be strongly correlated with coefficients of degree n + 1 and to a lesser extent with coefficients of degree n + 2. For existing terrestrial gravity data, these correlations may reach 0.8. These results suggest that significant aliasing error may exist in determinations of potential coefficients from terrestrial gravity data. This error could be reduced by solving for coefficients to degree n + 2 and retaining only those to degree n as a useful set. Tests are made, postulating various improvements in existing surface gravity, to estimate possible corresponding improvement in the potential coefficients.