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Geosat and ERS-1 Datum Offsets Relative to Topex/Poseidon Estimated Simultaneously with Geopotential Corrections from Multi-Satellite Crossover Altimetry

  • Wolfgang Bosch
  • Jaroslav Klokočnik
  • C. A. Wagner
  • Jan Kostelecký
Part of the International Association of Geodesy Symposia book series (IAG SYMPOSIA, volume 120)

Abstract

Crossover residuals, averaged over a sufficient long time period carry the signature of geopotentially based orbit errors. In addition they may exhibit geographical pattern which are inconsistent with orbit dynamics. Tracking system offsets and different orientations, for example, map to the so called “forbidden” harmonics: the degree 1 and the degree 2, order 1 coefficients. Long-term averaged dual satellite crossover residuals among Geosat, ERS-1 and Topex/Poseidon, all with JGM3 based orbits, have been used to solve simultaneously for i) corrections to the gravity field harmonics and ii) parameters which account for a coordinate frame offset relative to Topex/Poseidon. The parameters are estimated by a least squares adjustment. The paper investigates in particular the obstacle of large correlation between the shift parameters and the low degree order one harmonic coefficients. Results of the inversion indicate significant shifts between the coordinate frames of the altimeter missions involved. They must be taken into account, if secular sea level changes are to be investigated.

Keywords

Harmonic Coefficient Orbit Error Altimeter Mission Crossover Difference Data Offset 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

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References

  1. Bosch, W. (1997): Geoid and orbit corrections from crossover satellite altimetry. DGFI Report No. 63, Deutsches Geodätisches Forschungsinstitut, MünchenGoogle Scholar
  2. Kleusberg A. (1980): The Similarity Transformation of the Gravitational Potential Close to the Identity, manuscripta geodaetica, Vol. 5, 241–256Google Scholar
  3. Klokočník J., Kostelecky J., Jandová M. (1995): Altimetry with dual satellite crossovers, manuscripta geodaetica 20: 22–95Google Scholar
  4. Klokočník J., Wagner C.A., Kostelecky J. (1999): Spectral accuracy of Jgm3 from satellite crossover altimetry, J. Geodesy, 73, 138–146CrossRefGoogle Scholar
  5. Wagner C., Klokočník J., Kostelecky J (1997): Dualsatellite crossover lumped coefficients, their use in geodesy and oceanography. J. Geod 71: 603–616CrossRefGoogle Scholar
  6. Rosborough G.W. (1986): Satellite Orbit Perturbation due to the Geopotential. Report CSR-86-1, Univ. of Texas at Austin, Center for Space Research.Google Scholar

Copyright information

© Springer-Verlag Berlin · Heidelberg 2000

Authors and Affiliations

  • Wolfgang Bosch
    • 1
  • Jaroslav Klokočnik
    • 2
  • C. A. Wagner
    • 3
  • Jan Kostelecký
    • 4
  1. 1.Deutsches Geodätisches ForschungsinstitutMünchenGermany
  2. 2.Astronomical InstituteCzech Academy of SciencesCzech Republic
  3. 3.NOAA 1305 East-West HighwaySilver SpringUSA
  4. 4.Research Institute of Geodesy, Topography and CartographyCzech Republic

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