Affiliation: | a LAAS-CNRS, 7 Avenue du Colonel Roche, 31077, Toulouse, France;b CNES, 18 Avenue Edouard Belin, 31401, Toulouse, France;c University of Modena and Reggio Emilia and INFM, 905 Via Vignolese, 41100, Modena, Italy;d DaimlerChrysler Research Center, Wilhelm-Runge-Str. 11, 89081, Ulm, Germany |