1. Space Research Institute; Austrian Academy of Sciences; Graz Austria
2. Center for Solar-Terrestrial Research; New Jersey Institute of Technology; Newark New Jersey USA
3. Institute of Geophysics and Planetary Physics; University of California; Los Angeles California USA
4. Department of Physics; University of Alberta; Edmonton, Alberta Canada
5. Institut für Geophysik und extraterrestrische Physik; Technische Universität Braunschweig; Braunschweig Germany
6. Max Planck Institute of Solar System Research; Katlenburg-Lindau Germany
7. NASA Goddard Space Flight Center; Greenbelt Maryland USA
8. Space Sciences Laboratory; University of California; Berkeley California USA
9. Space and Atmospheric Physics Group; Imperial College London; London UK
10. Centre d'Etude Spatiale des Rayonnements; Université Paul Sabatier, UMR 5187, CNRS; Toulouse France