Lin Wang¹, Daniela Thaller², Andreja Susnik^3,4 and Rolf Dach³, (1)BKG Federal Agency for Cartography and Geodesy, G1, Frankfurt, Germany, (2)BKG, Federal Agency for Cartography and Geodesy, Geodesy, Frankfurt, Germany, (3)University of Bern, Astronomical Institute, Bern, Switzerland, (4)University of Newcastle, School of Engineering, Newcastle, United Kingdom