Karl Ulrich Schreiber¹, Johann J Eckl², Andreas Leidig², Theodor Bachem³, Alexander Neidhart³ and Torben Schüler³, (1)Technical University of Munich, FESG - Geodetic Observatory Wettzell, Bad Koetzting, Germany, (2)BKG Geodetic Observatory Wettzell, Geodetic Observatory Wettzell, Bad Kötzting, Germany, (3)BKG Geodetic Observatory Wettzell, Bad Kötzting, Germany