1. German Aerospace Center (DLR), Münchener Strasse 20, 82234 Wessling, Germany
2. Faculty VI Planning Building Environment, Technische Universität Berlin (TUB), Strasse des 17. Juni 135, 10623 Berlin, Germany
3. German Research Centre for Geosciences (GFZ), Telegrafenberg, 14473 Potsdam, Germany