1. Department of Astrophysical Sciences Princeton University Princeton NJ USA
2. Southwest Research Institute San Antonio TX USA
3. Department of Physics and Astronomy University of Texas at San Antonio San Antonio TX USA
4. Laboratory for Atmospheric and Space Physics University of Colorado Boulder Boulder CO USA
5. Space Sciences, Technologies and Astrophysics Research Institute, LPAP Université de Liège Liège Belgium
6. Johns Hopkins University Applied Physics Laboratory Laurel MD USA
7. Space Research Corporation Annapolis MD USA
8. Goddard Space Flight Center Greenbelt MD USA
9. Department of Physics and Astronomy University of Iowa Iowa City IA USA
10. Institut de Recherche en Astrophysique et Planétologie Toulouse France
11. Institute of Geophysics and Meteorology University of Cologne Cologne Germany