David Chaparro, Thomas Jagdhuber, German Aerospace Center (DLR), Germany; María Piles, Universitat de València, Spain; François Jonard, Université de Liège (ULiege), Belgium; Mercè Vall-llossera, Adriano Camps, Carlos López-Marínez, Universitat Politècnica de Catalunya (UPC), Spain; Anke Fluhrer, German Aerospace Center (DLR), Germany; Roberto Fernández-Morán, Universitat de València, Spain; Martin J. Baur, Universtity of Cambridge, United Kingdom; Andrew F. Feldman, NASA Goddard Space Flight Center, United States; Dara Entekhabi, Massachusetts Institute of Technology (MIT), United States