1. Associate Professor, Dept. of Geomatics, HafenCity Univ., Hamburg, Hebebrandstr. 1, 22297, Germany; presently, Western Australian Centre for Geodesy, Curtin Univ. of Technology, G.P.O. Box 1987, Perth, WA 6845, Australia.
2. Senior Scientist, Geodesy and Geodynamics Lab, Institute for Geodesy and Photogrammetry, ETH Zurich, HPV H 51, Schafmattstrasse 34, Zürich CH-8093, Switzerland.
3. Research Associate, Geodesy and Geodynamics Lab, Institute of Geodesy and Photogrammetry, ETH Zurich, HPV H 51, Schafmattstrasse 34, Zürich CH-8093, Switzerland.
4. Professor, Institut für Erdmessung, Leibniz Univ. of Hannover, Schneiderberg 50, Hannover 30167, Germany.