[1] Danish Space Research Institute, Juliane Maries Vej 30, 2100 Copenhagen Ø, Denmark
[2] Metorex International Oy, Nihtisillankuja 5, 02631 Espoo, Finland
[3] Observatory, University of Helsinki, PO Box 14, 00014 Helsinki, Finland
[4] Space Research Center, Bartycka 18A, 00-716 Warsaw, Poland
[5] Institute de Astrofisica, CNR, via del Fosso del Cavaliere 100, 00133 Rome, Italy
[6] ENEA-Frascati, UTS-Fusione, via Enrico Fermi 45, 00045 Frascati, Italy
[7] IASF-Bologna, via Gobetti 101, 40129 Bologna, Italy
[8] Dipartimento di Fisica, University of Ferrara, via del Paradiso 12, 44100 Ferrara, Italy
[9] GACE, University of Valencia, PO Box 20085, 46071 Valencia, Spain
[10] Stockholm University, Roslagstullgatan 21, Stockholm, Sweden
[11] Copernicus Astronomical Center, Bartycka 18, 00-716 Warsaw, Poland
[12] Inst. Astrofis. Andalucia (IAA-CSIC), PO Box 03004, 18080 Granada, Spain
[13] Alenia Spazio, Space Division, Corso Marche 41, 10146 Torino, Italy
[14] ESOC, Robert-Bosch Str. 5, 64293 Darmstadt, Germany
[15] ESTEC, Keplerlaan 1, 2200 AG Noordwijk, Netherlands
[16] MPI Extraterr. Physik, Gießenbachstr., 85748 Garching, Germany
[17] ISDC, Chemin d'Écogia 16, Versoix, Switzerland