Height System Unification with GOCE – Overview and Selected Results
Gruber, Thomas1; Rummel, Reiner1; Sideris, Michael2; Rangelova, Elena2; Woodworth, Phil3; Hughes, Chris3; Ihde, Johannes4; Liebsch, Gunter4; Schäfer, Uwe4; Rülke, Axel4; Gerlach, Christian5; Haagmans, Roger6
1Technical University Munich, GERMANY; 2University of Calgary, CANADA; 3National Oceanography Centre Liverpool, UNITED KINGDOM; 4Bundesamt für Kartographie und Geodäsie, Frankfurt/Main, GERMANY; 5Kommission für Erdmessung und Glaziologie, Bayerische Akademie der Wissenschaften, GERMANY; 6European Space Agency, NETHERLANDS

GOCE will allow the determination of geoid heights with an accuracy of 1-2cm and spatial resolution of about 100 km. An important application that will benefit from this is the global unification of the (over 100) existing height systems. GOCE will provide three important components of height unification: highly accurate potential differences (geopotential numbers), a global geoid- or quasi-geoid-based reference surface for elevations that will be independent of inaccuracies and inconsistencies of local and regional data, and a consistent way to refer to the same datum all the relevant gravimetric, topographic and oceanographic data. The paper summarizes results of a project supported by the European Space Agency, whose main goal is to identify the impact of GOCE gravity field models on world height system unification.