1. Geophysical Institute University of Alaska Fairbanks Fairbanks AK USA
2. NASA Goddard Space Flight Center Greenbelt MD USA
3. Space Research Institute Russian Academy of Sciences Moscow Russia
4. Mullard Space Science Laboratory University College London London UK
5. Applied Physics Laboratory Johns Hopkins University Baltimore MD USA
6. Astronomy Department University of Maryland College Park MD USA
7. European Space Research and Technology Centre European Space Agency Noordwjik The Netherlands
8. Department of Physics College of Science Rikkyo University Tokyo Japan
9. Johns Hopkins University Baltimore MD USA
10. Leicester University Leicester UK
11. State Key Laboratory of Space Weather National Space Science Center Chinese Academy of Sciences Beijing China
12. Center for Space Physics Boston University Boston MA USA
13. Astrophysics Department Argelander Institut für Astronomie University of Bonn Bonn Germany