Affiliation: | Department of Earth and Environmental Sciences, Ludwig-Maximilians-University Munich, Theresienstraße 41, D-80333;Munich, Germany. E-mail: Forschungseinrichtung Satellitengeodäsie, Technical University Munich, Fundamentalstation Wettzell, Sackenriederstrasse 25, D-93444;Kötzting, Germany Department of Physics and Astronomy, University of Canterbury, Private Bag 4800,;Christchurch, New Zealand |