[1] Brown Univ, Dept Earth Environm & Planetary Sci, Providence, RI 06912 USA
[2] Aistech Space SL, Rua Pontes 3, Nigran 36350, Galicia, Spain
[3] Univ Helsinki, Dept Phys, Gustaf Hallstromin Katu 2a,POB 64, FI-00014 Helsinki, Finland
[4] Ural Fed Univ, Inst Phys & Technol, Mira Str 19, Ekaterinburg 620002, Russia
[5] CSIC, ICE, Inst Space Sci, Meteorites,Minor Bodies & Planetary Sci Grp, Campus UAB,Carrer Can Magrans S-N, E-08193 Barcelona, Catalonia, Spain
[6] IEEC, C Gran Capita 2-4,Ed Nexus,Desp 201, E-08034 Barcelona, Catalonia, Spain
[7] Yale Univ, Dept Geol & Geophys, POB 6666, New Haven, CT 06511 USA