On Modelling the Regional Distortions of the European Gravimetric Geoid EGG97 in Romania

Robert Tenzer, I. Prutkin, R. Klees, T. Rus, N. Avramiuc

Research output: Chapter in book / Conference proceedingConference article published in proceeding or bookAcademic researchpeer-review


We analyze and model the regional distortions of the European Gravimetric Geoid 1997 (EGG97) in Romania using GPS-levelling data. A comparison of the EGG97 gravimetric quasi-geoid with the GPS-levelling data indicates the presence of significant regional distortions in particular areas along the border of the country. To model the regional distortions, we apply two methods: (i) the recently proposed innovation function approach by Prutkin and Klees (J. Geod. 82(3), 147-156, 2007), which is based on a mathematical formulation of the differences between gravimetric quasi-geoid and GPS-levelling data in terms of a Cauchy boundary-value problem for the Laplace equation. (ii) the conventional approach of a low-degree polynomial correction surface. The results reveal that the innovation function approach gives more options to model a more complex trend of the regional gravimetric quasi-geoid distortions than the correction surface approach.
Original languageEnglish
Title of host publicationGravity, Geoid and Earth Observation - IAG Commission 2
Subtitle of host publicationGravity Field
Number of pages6
Publication statusPublished - 1 Dec 2010
Externally publishedYes
EventIAG International Symposium on "Gravity, Geoid and Earth Observation 2008" - Chania, Crete, Germany
Duration: 23 Jun 200827 Jun 2008


ConferenceIAG International Symposium on "Gravity, Geoid and Earth Observation 2008"
CityChania, Crete


  • GPS-levelling
  • Gravimetric quasi-geoid
  • Regional distortions

ASJC Scopus subject areas

  • Computers in Earth Sciences
  • Geophysics

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