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European Gravity and Geoid Project (EGGP) of the International Association of Geodesy

Publications
The European Gravity and Geoid Project (EGGP) is incorporated within Commission 2 (Gravity Field), Sub-commission 2.4 (Regional Geoid Determination), of the International Association of Geodesy (IAG). The project was established directly after the IUGG General Assembly in Sapporo, Japan, 2003, and is running during the four-year period from 2003 to 2007. The main goal of the project is the re-computation of a European geoid and quasigeoid model with significantly improved accuracy as compared to the previous model EGG97 (Denker und Torge 1998). This appeared to be possible since improved gravity field data sets (global geopotential models from the CHAMP and GRACE missions, better digital terrain models such as SRTM3 and GTOPO30, updated land and marine gravity data, new altimetric gravity data, GPS and levelling data) as well as refined modelling and computing techniques have become available..
 
The project is organized by a steering committee (H. Denker (Chair), J.-P. Barriot, R. Barzaghi, R. Forsberg, J. Ihde, A. Kenyeres, U. Marti, I.N. Tziavos) and has about 50 national delegates (project members) from most of the countries in Europe. Furthermore, the project has strong connections to the International Gravity Field Service (IGFS), with its centers Bureau Gravimétrique International (BGI), International Geoid Service (IGeS), National Geospatial-Intelligence Agency (NGA), and GeoForschungsZentrum Potsdam (GFZ), as well as to several other IAG bodies, e.g., EUREF. The EGGP terms of reference can be found at
http://www.iag-aig.org/ or
http://www.geology.osu.edu/~jekeli.1/iag-commission2/

Interim solutions were presented at the IAG symposium in Porto, 2004 (Denker et al. 2004 and 2005), at the GRACE Science Team Meeting in Austin, 2005 (Denker 2005a), as well as at the IAG symposium in Istanbul, 2006 (Denker et al. 2006). The results obtained so far in Central Europe demonstrate that significant improvements are possible by utilizing updated gravity field data sets and global geopotential models from the GRACE mission (Denker 2006, Denker et al. 2006). The results indicate an accuracy potential of the gravimetric quasigeoid models in the order of 3 - 5 cm at continental scales and 1 - 2 cm over shorter distances up to a few 100 km, provided that high quality and resolution input data are available.
 
Contact person:
Dr.-Ing. Heiner Denker
Publications:
  • Denker, H.: Improved modeling of the geoid in Europe based on GRACE data. Vortrag u. CD-ROM Proceed., GRACE Science Team Meeting, The Univ. of Texas at Austin, Texas, U.S.A., Oct. 13-14, 2005a.
  • Denker, H.: Static and time-variable gravity field from GRACE. Pres. Paper and http://www.oso.chalmers.se/~hgs/NKGWG/M2005/PrelProg.html, Nordic Geodetic Commission, Annual Meeting, Masala, Finland, May 3-4, 2005b.
  • Denker, H.: Evaluation of SRTM3 and GTOPO30 terrain data in Germany. In: C. Jekeli, L. Bastos, J. Fernandes (eds.): Gravity, Geoid and Space Missions - GGSM2004, IAG Internat. Symp., Porto, Portugal, 2004. IAG Symp., Vol. 129, 218-223, Springer Verlag, Berlin, Heidelberg, New York, 2005c (download pdf-file).
  • Denker, H.: Das Europäische Schwere- und Geoidprojekt (EGGP) der Internationalen Assoziation für Geodäsie. Z.f.Verm.wesen 131, 2006 (downlaod pdf-file).
  • Denker, H., J.-P. Barriot, R. Barzaghi, R. Forsberg, J. Ihde, A. Kenyeres, U. Marti, I.N. Tziavos: Status of the European Gravity and Geoid Project EGGP. Newton's Bulletin, No. 2, 87-92, Toulouse, 2004.
  • Denker, H., J.-P. Barriot, R. Barzaghi, R. Forsberg, J. Ihde, A. Kenyeres, U. Marti, I.N. Tziavos: Status of the European Gravity and Geoid Project EGGP. In: C. Jekeli, L. Bastos, J. Fernandes (eds.): Gravity, Geoid and Space Missions - GGSM2004, IAG Internat. Symp., Porto, Portugal, 2004. IAG Symp., Vol. 129, 125-130, Springer Verlag, Berlin, Heidelberg, New York, 2005 (downlaod pdf-file).
  • Denker, H., J.-P. Barriot, R. Barzaghi, R. Forsberg, J. Ihde, A. Kenyeres, U. Marti, I.N. Tziavos: The European Gravity and Geoid Project EGGP. Proceed. 1st Symp. Internat. Gravity Field Service (IGFS), Gravity Field of the Earth, Istanbul, 28 Aug. - 1 Sept., 2006, in press.
  • Denker, H., M. Roland: Compilation and evaluation of a consistent marine gravity data set surrounding Europe. In: F. Sanso (ed.): A Window on the Future of Geodesy - Sapporo, Japan, June 30 - July 11, 2003. IAG Symp., Vol. 128, 248-253, Springer Verlag, Berlin, Heidelberg, New York, 2005 (downlaod pdf-file).
  • Denker, H., W. Torge: The European Gravimetric Quasigeoid EGG97 - An IAG supported continental enterprise. In: R. Forsberg, M. Feissel, R. Dietrich (eds.): Geodesy on the Move - Gravity, Geoid, Geodynamics and Antarctica. IAG Symp., Vol. 119, 249-254, Springer Verlag, Berlin, Heidelberg, New York, 1998 (download pdf-file).

last change 21.11.2006 by webmaster
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