1. European Space Operations Centre, Mission Analysis Office, Robert-Bosch-Str. 5, D-64293 Darmstadt, Germany
2. International Space University, Parc d’Innovation, 1 Rue Jean Dominique Cassini, F-67400 Illkirch - Graffenstaden, France
3. Astronomical Institute of the University of Bern, Sidlerstrasse 5, CH-3012, Bern, Switzerland
4. Institute of Aerospace Systems (ILR), Technische Universität Braunschweig, Hermann-Blenk-Str. 23, D-38108, Braunschweig, Germany