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Calibration and Validation of GOCE Gravity Gradients

  • J. Bouman
  • R. Koop
  • R. Haagmans
  • J. Müllerr
  • N. Sneeuw
  • C.C. Tscherning
  • P. Visser
Part of the International Association of Geodesy Symposia book series (IAG SYMPOSIA, volume 128)

Abstract

GOCE will be the first satellite ever to measure the second derivatives of the Earth’s gravitational potential in space. With these measurements it is possible to derive a high accuracy and resolution gravitational field if systematic errors have been removed to the extent possible from the data and the accuracy of the gravity gradients has been assessed. It is therefore necessary to understand the instrument characteristics and to setup a valid calibration model. The calibration parameters of this model could be determined by using GOCE data themselves or by using independent gravity field information. Also the accuracy or error assessment relies on either GOCE or independent data. We will demonstrate how state-of-the-art global gravity field models, terrestrial gravity data and observations at satellite track crossovers can be used for calibration/validation. In addition we will show how high quality terrestrial data could play a role in error assessment.

Keywords

Gravity Anomaly Gravity Gradient Omission Error Geoid Height Error Assessment 
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. Albertella, A., Migliaccio, F., Sansò, F., and Tscheming, C., Scientific data production quality assessment using local space-wise pre-processing, in From Eötvös to mGal, Final Report, edited by H. Sünkel, ESA/ESTEC contract no. 13392/98/NL/GD, 2000.Google Scholar
  2. Arabelos, D. and Tscheming, C., Calibration of satellite gradiometer data aided by ground gravity data, Journal of Geodesy, 72, 617–625, 1998.CrossRefGoogle Scholar
  3. Bouman, J. and Koop, R., Error assessment of GOCE SGG data using along track interpolation, Advances in Geosciences, 1, 27–32, 2003a.CrossRefGoogle Scholar
  4. Bouman, J. and Koop, R., Geodetic methods for calibration of GRACE and GOCE, Space Science Reviews, 108, 293–303, 2003b.CrossRefGoogle Scholar
  5. Denker, H., Computation of gravity gradients for Europe for calibration/validation of GOCE data, in Gravity and Geoid 2002; 3rd Meeting of the IGGC, edited by I. Tziavos, pp. 287–292, Ziti Editions, 2003.Google Scholar
  6. ESA, Gravity Field and Steady-State Ocean Circulation Mission, Reports for mission selection; the four candidate earth explorer core missions, ESA SP-1233(1), 1999.Google Scholar
  7. ESA, From Eötvös to mGal, Final report, ESA/ESTEC Contract No. 13392/98/NL/GD, 2000.Google Scholar
  8. Haagmans, R., Prijatna, K., and Omang, O., An alternative concept for validation of GOCE gradiometry results based on regional gravity, in Gravity and Geoid 2002; 3rd Meeting of the IGGC, edited by I. Tziavos, pp. 281–286, Ziti Editions, 2003.Google Scholar
  9. Heck, B., Zur lokalen Geoidbestimmung aus terrestrischen Messungen vertikaler Schweregradienten, Reihe C No. 259, Deutsche Geodätische Commission, 1979.Google Scholar
  10. Jarecki, F. and Müller, J., Validation of GOCE gradients using crossovers, in GEOTECHNOLOGIEN: Observation of the System Earth from Space, GEOTECHNOLOGIEN Science Report No. 3, 2003.Google Scholar
  11. Knudsen, P., Estimation and modelling of the local empirical covariance function using gravity and satellite altimeter data, Bulletin Géodésique, 61, 145–160, 1987.Google Scholar
  12. Koop, R., Visser, P., and Tscheming, C., Aspects of GOCE calibration, in International GOCE user workshop, vol. WPP-188, ESA/ESTEC, 2001.Google Scholar
  13. Koop, R., Bouman, J., Schrama, E., and Visser, P., Calibration and error assessment of GOCE data, in Vistas for Geodesy in the New Millenium, edited by J. Adam and K.-P. Schwarz, vol. 125 of International Association of Geodesy Symposia, pp. 167–174, Springer, 2002.Google Scholar
  14. Moritz, H., Advanced physical geodesy, Wichmann, 1980.Google Scholar
  15. Müller, J., Jarecki, F., and Wolf, K., External calibration and validation of GOCE gradients, in Gravity and Geoid 2002; 3rd Meeting of the IGGC, edited by I. Tziavos, pp. 268–274, Ziti Editions, 2003.Google Scholar
  16. Tscherning, C., A FORTRAN IV program for the determination of the anomalous potential using stepwise least squares collocation, Report No. 212, Department of Geodetic Science and Surveying, Ohio State University, 1974.Google Scholar
  17. Tscherning, C., Computation of covariances of derivatives of the anomalous gravity potential in a rotated reference frame, Manuscripta Geodetica, 8, 115–123, 1993.Google Scholar
  18. Tscherning, C. and Rapp, R., Closed covariance expressions for gravity anomalies, geoid undulations, and deflections of the vertical implied by anomaly degree variance models, Report No. 208, Department of Geodetic Science and Surveying, Ohio State University, 1974.Google Scholar

Copyright information

© Springer-Verlag Berlin Heidelberg 2005

Authors and Affiliations

  • J. Bouman
    • 1
  • R. Koop
    • 1
  • R. Haagmans
    • 2
  • J. Müllerr
    • 3
  • N. Sneeuw
    • 4
  • C.C. Tscherning
    • 5
  • P. Visser
    • 6
  1. 1.SRON National Institute for Space ResearchUtrechtThe Netherlands
  2. 2.European Space Agency, ESTECNoordwijkThe Netherlands
  3. 3.Institut für ErdmessungUniversity of HannoverHannoverGermany
  4. 4.Department of Geomatics EngineeringUniversity of CalgaryCalgaryCanada
  5. 5.Department of GeophysicsUniversity of CopenhagenCopenhagenDenmark
  6. 6.DEOS, Delft University of TechnologyDelftThe Netherlands

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