1. NASA Goddard Space Flight Center; Greenbelt Maryland USA
2. Mullard Space Science Laboratory; University College London; Surrey UK
3. Institute for Astrophysics and Computational Sciences; Catholic University of America; Washington District of Columbia USA
4. Southwest Research Institute; San Antonio Texas USA
5. Institutet för rymdfysik; Swedish Institute of Space Physics; Kiruna Sweden
6. L'Institut de Recherche en Astrophysique et Planétologie; CNRS; Toulouse France
7. University Paul Sabatier; Toulouse France
8. Jet Propulsion Laboratory; California Institute of Technology; Pasadena California USA
9. Space Sciences Laboratory; University of California; Berkeley California USA
10. Laboratory for Atmospheric and Space Physics; Boulder Colorado USA
11. Space Research Institute; Austrian Academy of Sciences; Graz Austria