1. Southwest Research Institute, San Antonio, TX, USA.
2. University of New Hampshire, Durham, NH, USA.
3. University of California, Berkeley, CA, USA.
4. University of Maryland, College Park, MD, USA.
5. NASA, Goddard Space Flight Center, Greenbelt, MD, USA.
6. University of Colorado LASP, Boulder, CO, USA.
7. Blackett Laboratory, Imperial College London, London, UK.
8. West Virginia University, Morgantown, WV, USA.
9. Space Research Institute, Austrian Academy of Sciences, Graz, Austria.
10. Johns Hopkins University Applied Physics Laboratory, Laurel, MD, USA.
11. University of California, Los Angeles, CA, USA.
12. University of Delaware, Newark, DE, USA.
13. Swedish Institute of Space Physics, Uppsala, Sweden.
14. Royal Institute of Technology, Stockholm, Sweden.
15. Aerospace Corporation, El Segundo, CA, USA.
16. University of Colorado, Boulder, CO, USA.
17. Lockheed Martin Advanced Technology Center, Palo Alto, CA, USA.
18. Institut de Recherche en Astrophysique et Planétologie, Toulouse, France.
19. Department of Physics and Astronomy, Rice University, Houston, TX, USA.
20. Institute for Space and Astronautical Sciences, Sagamihara, Japan.
21. NASA, Marshall Space Flight Center, Huntsville, AL, USA.