Status of the European Gravity and Geoid Project EGGP

H. Denker; J. P. Barriot; R. Barzaghi; R. Forsberg; J. Ihde; A. Kenyeres; U. Marti; I. N. Tziavos

doi:10.1007/3-540-26932-0_22

Details

Original language	English
Title of host publication	Gravity, Geoid and Space Missions
Subtitle of host publication	GGSM 2004 IAG International Symposium Porto, Portugal August 30 – September 3, 2004
Pages	125-130
Number of pages	6
ISBN (electronic)	978-3-540-26932-8
Publication status	Published - Sept 2005

Publication series

Name	International Association of Geodesy Symposia
Volume	129
ISSN (Print)	0939-9585

Abstract

The European Gravity and Geoid Project (EGGP) is a project within I AG Commission 2, reporting to Sub-commission 2.4. The main goal of the project is to compute an improved European geoid and quasigeoid model. This appears to be possible now because significant new and improved data sets have become available since the last computation in 1997 (EGG97). These improvements include better global geopotential models from the CHAMP and GRACE missions, better digital elevation models (DEMs) in some regions (e.g., new national DEMs, SRTM3, GTOPO30), updated gravity data sets for selected regions, updated ship and altimetric gravity data including improved merging procedures, the use of GPS/levelling data, as well as improved modelling and computation techniques. An overview is given on the project structure, the computation strategy, the available data sets, the expected accuracies, the time schedule, and the work done so far. The primary input data sets are high-resolution gravity and terrain data supplemented by a state-of-the-art global geopotential model. The general computation strategy is the removerestore procedure. The initial computations are based on the spectral combination approach with integral formulas evaluated by ID FFT. First results based on an updated terrestrial gravity data set and GRACE geopotential models show significant improvements (up to 60%) as compared to GPS/- levelling. Moreover, also the tilts, existing in previous solutions, have been reduced to typically below 0.1 ppm.

Keywords

CHAMP, EGGP, Geoid, GPS/levelling, GRACE, Gravity field modelling, Quasigeoid

ASJC Scopus subject areas

Earth and Planetary Sciences(all)
Computers in Earth Sciences
Earth and Planetary Sciences(all)
Geophysics

Cite this

Status of the European Gravity and Geoid Project EGGP. / Denker, H.; Barriot, J. P.; Barzaghi, R. et al.
Gravity, Geoid and Space Missions: GGSM 2004 IAG International Symposium Porto, Portugal August 30 – September 3, 2004. 2005. p. 125-130 (International Association of Geodesy Symposia; Vol. 129).

Research output: Chapter in book/report/conference proceeding › Conference contribution › Research › peer review

Denker, H, Barriot, JP, Barzaghi, R, Forsberg, R, Ihde, J, Kenyeres, A, Marti, U & Tziavos, IN 2005, Status of the European Gravity and Geoid Project EGGP. in Gravity, Geoid and Space Missions: GGSM 2004 IAG International Symposium Porto, Portugal August 30 – September 3, 2004. International Association of Geodesy Symposia, vol. 129, pp. 125-130. https://doi.org/10.1007/3-540-26932-0_22

Denker, H., Barriot, J. P., Barzaghi, R., Forsberg, R., Ihde, J., Kenyeres, A., Marti, U., & Tziavos, I. N. (2005). Status of the European Gravity and Geoid Project EGGP. In Gravity, Geoid and Space Missions: GGSM 2004 IAG International Symposium Porto, Portugal August 30 – September 3, 2004 (pp. 125-130). (International Association of Geodesy Symposia; Vol. 129). https://doi.org/10.1007/3-540-26932-0_22

Denker H, Barriot JP, Barzaghi R, Forsberg R, Ihde J, Kenyeres A et al. Status of the European Gravity and Geoid Project EGGP. In Gravity, Geoid and Space Missions: GGSM 2004 IAG International Symposium Porto, Portugal August 30 – September 3, 2004. 2005. p. 125-130. (International Association of Geodesy Symposia). doi: 10.1007/3-540-26932-0_22

Denker, H. ; Barriot, J. P. ; Barzaghi, R. et al. / Status of the European Gravity and Geoid Project EGGP. Gravity, Geoid and Space Missions: GGSM 2004 IAG International Symposium Porto, Portugal August 30 – September 3, 2004. 2005. pp. 125-130 (International Association of Geodesy Symposia).

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