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Erwan Tr´eguier received the Engineer Degree from the ´ Ecole Nationale Sup´erieure d’Ing´enieurs en Con- structions A´eronautiques (ENSICA, now part of the Institut Sup´erieur de l’A´eronautique et de l’Espace, Toulouse, France) in 2001. He received the Ph.D Degree from the Universit´e Paul Sabatier (UPS, Toulouse, France) in 2008, after defending his thesis at the Centre d’ ´ Etude Spatiale des Rayonnements (CESR). He is currently holding a postdoctoral posi- tion at ESAC. His main field of research is planetary science. His research interests include the composi- tion of the Martian surface, from both in-situ and orbital data, geochemical modeling of alteration, and investigating multidimensional dataset through statistical approaches. Ma¨el Guiheneuf received the M.S. degree in Signal Processing in 2009 from ´ Ecole Centrale de Nantes (France). He was a student fellow at ESAC during six months in 2009 on the following subject: “Opti- mization strategies for hyperspectral unmixing using Bayesian source separation”. Sa¨ıd Moussoui received the State engineering de- gree from ´ Ecole Nationale Polytechnique, Algiers, Algeria, in 2001, and, in 2005, the Ph.D. degree in Automatic Control and Signal Processing from Universit´e Henri Poincar´e, Nancy, France. He is currently an Associate Professor at ´ Ecole Centrale de Nantes. Since September 2006, he is with the Institut de Recherche en Communication et Cybern´etique de Nantes (IRCCYN, UMR CNRS 6597). His research interests are in statistical signal and image processing including source separation, Bayesian estimation and their applications. Fr´ed´eric Schmidt received his Ph.D. in 2007 at the Laboratoire de Plan´etologie de Grenoble (CNRS- UJF), Grenoble, France. He spent two years at European Space Agency (ESAC, Madrid) as a post- doctoral fellow. Since 2009, he has been assistant professor at the laboratory Interaction et Dynamique des Environnements de Surface (Universit´e Paris Sud - CNRS). His research interests are analysis of hyperspectral data, ices and polar processes on planet Mars. He is Co-Investigator of the OMEGA imaging spectrometer onboard Mars Express (ESA). Albrecht Schmidt received his Ph.D. in 2002 from the University of Amsterdam. After working three years at the University of Aalborg (Denmark), he joined the European Space Agency, where he now works as a Computer Scientist in Solar System Operations Division. His research interests are data management and data analysis. Nicolas Dobigeon (S’05–M’08) was born in An- goulˆeme, France, in 1981. He received the Eng. degree in electrical engineering from ENSEEIHT, Toulouse, France, and the M.Sc. degree in signal processing from the National Polytechnic Institute of Toulouse, both in 2004. In 2007, he received the Ph.D. degree in signal processing also from the National Polytechnic Institute of Toulouse. From 2007 to 2008, he was a postdoctoral re- search associate at the Department of Electrical Engineering and Computer Science, University of Michigan. Since 2008, he has been an Assistant Professor with the National Polytechnic Institute of Toulouse (ENSEEIHT - University of Toulouse), within the Signal and Communication Group of the IRIT Laboratory. His research interests are centered around statistical signal and image processing with a particular interest to Bayesian inference and Markov chain Monte Carlo (MCMC) methods.