Summary
The new CHAMP and GRACE global gravity field models provide a significantly improved long wavelength gravity spectrum. These satellite-only models are therefore a good basis for studying long wavelength errors of the terrestrial gravity data, as they can be considered as a completely independent source of information.
In this contribution, the models from the CHAMP and GRACE mission as well as EGM96 are used for the evaluation of a terrestrial gravity data set for Europe. The differences are examined both geographically and spectrally. Different techniques are applied for the evaluation, including spherical harmonic expansions, degree variances and the multiresolution analysis based on spherical wavelets. All techniques confirm the existence of small long wavelength errors in the terrestrial gravity data. The reason for such errors may be various, e.g., lacking or poor quality gravity data in some regions, or effects of datum inconsistencies.
Access this chapter
Tax calculation will be finalised at checkout
Purchases are for personal use only
Preview
Unable to display preview. Download preview PDF.
References
Center for Space Research, The University of Texas at Austin (2003) GRACE Gravity Model. http://www.csr.utexas.edu/grace/gravity/.
Denker H (2001) On the effect of datum inconsistencies of gravity and position on European geoid computations. In: Proc IAG Scientific Assembly, Budapest, Hungary, 2–7 Sep, on CD-ROM.
Denker H and Torge W (1998) The European Gravimetric Quasigeoid EGG97 — An IAG supported continental enterprise. In: Forsberg R, Feissel M, and Dietrich R, eds, Geodesy on the Move — Gravity, Geoid, Geodynamics, and Antarctica, IAG Symposia, 119, Springer Verlag: 249–254.
Freeden W, Grevens T, and Schreiner M (1998) Constructive Approximation on the Sphere with Application to Geomathematics. Clarendon Press, Oxford.
Heck B (1990) An evaluation of some systematic error sources affecting terrestrial gravity anomalies. Bulletin Géodésique 64: 88–108.
Reigber C, Balmino G, Schwintzer P, Biancale R, Bode A, Lemoine J-M, König R, Loyer S, Neumayer H, Marty J-C, Barthelmes F, Perosanz F, and Zhu SY (2002) A high quality global gravity field model from CHAMP GPS tracking data and Accelerometry (EIGEN-1S). Geoph Res Lett 29(14): doi:10.1029/2002GL015064.
Reigber C, Schmidt R, Flechtner F, König R, Meyer U, Neumayer K-H, Schwintzer P, and Zhu SY (2003) First EIGEN Gravity Field Model based on GRACE Mission Data Only. Geoph Res Lett (submitted).
Reigber C, Schwintzer P, Neumayer K-H, Barthelmes F, König R, Förste C, Balmino G, Biancale R, Lemoine J-M, Loyer S, Bruinsma S, Perosanz F, and Fayard T (2003) The CHAMP-only Earth Gravity Field Model EIGEN-2. Adv Space Res 31(8): doi:10.1016/S0273-1177(03)00162-5.
Roland M and Denker H (2003) Evaluation of Terrestrial Gravity Data by New Global Gravity Field Models. In: Tziavos IN, ed, Gravity and Geoid — 3rd Meeting of the International Gravity and Geoid Commission, Thessaloniki, Greece, August 26–30, 2002, Publishing Ziti: 256–261.
Author information
Authors and Affiliations
Editor information
Editors and Affiliations
Rights and permissions
Copyright information
© 2005 Springer-Verlag Berlin Heidelberg
About this chapter
Cite this chapter
Roland, M., Denker, H. (2005). Evaluation of Terrestrial Gravity Data by Independent Global Gravity Field Models. In: Reigber, C., Lühr, H., Schwintzer, P., Wickert, J. (eds) Earth Observation with CHAMP. Springer, Berlin, Heidelberg. https://doi.org/10.1007/3-540-26800-6_9
Download citation
DOI: https://doi.org/10.1007/3-540-26800-6_9
Publisher Name: Springer, Berlin, Heidelberg
Print ISBN: 978-3-540-22804-2
Online ISBN: 978-3-540-26800-0
eBook Packages: Earth and Environmental ScienceEarth and Environmental Science (R0)