1. Centre d'Etude Spatiale des Rayonnements; Toulouse France
2. Space Sciences Lab; University of California; Berkeley California USA
3. Department of Geophysics; University of Washington; Seattle Washington USA
4. Institute for the Study of Earth, Oceans, and Space; University of New Hampshire; Durham New Hampshire USA
5. Istituto di Fisica dello Spazio Interplanetario; Rome Italy
6. Max-Planck-Institut für Extraterrestrische Physik; Garching Germany
7. Max-Planck-Institut für Aeronomie; Katlenburg-Lindau Germany
8. Swedish Institute of Space Physics; Kiruna Sweden