Southwest Research Institute, P.O. Drawer 28510, San Antonio, TX 78228-0510, USA; Space Research Institute (IKI), 84/32 Profsoyuznaya Str, Moscow, 117997 Russian Federation
Centre d'étude des Environnements Terrestre et Planétaires/CNRS, 4 avenue de Neptune, Saint-Maur, 94107 France
Institut für Weltraumforschung, Schmiedlstr. 6, Graz, 8042 Austria
Service d'Aeronomie du CNRS, Cedex BP n"3, Verrieres-Le-Buisson, 91371 France
Max-Planck-Institut für Sonnensystemforschung, Max-Planck-Strasse 2, Katlenburg-Lindau, 37191 Germany
Institut für Weltraumforschung, Schmiedlstr. 6, Graz, 8042 Austria
NASA MSFC National Space Science & Technology Center, Mail Code SD50 320 Sparkman Dr., Huntsville, AL 35805, USA; Space Research Institute (IKI), 84/32 Profsoyuznaya Str, Moscow, 117997 Russian Federation
Southwest Research Institute, P.O. Drawer 28510, San Antonio, TX 78228-0510, USA
Centre d'étude des Environnements Terrestre et Planétaires/CNRS, 4 avenue de Neptune, Saint-Maur, 94107 France
Centre d'étude des Environnements Terrestre et Planétaires/CNRS, 4 avenue de Neptune, Saint-Maur, 94107 France
Physikalisches Institut, University of Bern, Sidlerstr. 5, Bern, CH-3012 Switzerland
Space Research Institute (IKI), 84/32 Profsoyuznaya Str, Moscow, 117997 Russian Federation
Space Research Institute (IKI), 84/32 Profsoyuznaya Str, Moscow, 117997 Russian Federation
Space Research Institute (IKI), 84/32 Profsoyuznaya Str, Moscow, 117997 Russian Federation
Research Institute for Particle and Nuclear Physics, 29-33 Konkoly Thege street, Budapest, H-1121 Hungary