1. University of New Hampshire, Durham, NH, USA.
2. Southwest Research Institute (SwRI), San Antonio, TX, USA.
3. University of California, Berkeley, CA, USA.
4. University of Bergen, Bergen, Norway.
5. NASA Goddard Space Flight Center, Greenbelt, MD, USA.
6. University of Colorado Laboratory for Atmospheric and Space Physics, Boulder, CO, USA.
7. Swedish Institute of Space Physics, Uppsala, Sweden.
8. Space Research Institute, Austrian Academy of Sciences, Graz, Austria.
9. Aerospace Corporation, El Segundo, CA, USA.
10. Johns Hopkins University Applied Physics Laboratory, Laurel, MD, USA.
11. University of Maryland, College Park, MD, USA.
12. Blackett Laboratory, Imperial College London, London, UK.
13. University of Texas, San Antonio, TX, USA.
14. University of California, Los Angeles, CA, USA.
15. University of Delaware, Newark, DE, USA.
16. Royal Institute of Technology, Stockholm, Sweden.
17. University of Iowa, Iowa City, IA, USA.
18. Laboratoire de Physique des Plasmas, CNRS/Ecole Polytechnique/Sorbonne Université/Univ. Paris Sud/Observatoire de Paris, Paris, France.
19. Lockheed Martin Advanced Technology Center, Palo Alto, CA, USA.
20. Institut de Recherche en Astrophysique et Planétologie, CNRS, Centre National d’Etudes Spatiales, Université de Toulouse, Toulouse, France.
21. Institute for Space and Astronautical Sciences, Sagamihara, Japan.