1. Space Research Institute; Austrian Academy of Sciences; Graz Austria
2. Institute of Physics; St. Petersburg State University; St. Petersburg Russia
3. Finnish Meteorological Institute; Helsinki Finland
4. Space Sciences Laboratory; University of California; Berkeley California USA
5. Mullard Space Science Laboratory; University College London; Dorking UK
6. Space and Atmospheric Physics Group, Blackett Laboratory; Imperial College; London UK
7. Swedish Institute of Space Physics; Uppsala Sweden
8. CESR/CNRS; Toulouse France
9. MPE; Garching Germany