1. Southwest Research Institute San Antonio TX USA
2. Department of Physics and Astronomy University of Texas at San Antonio San Antonio TX USA
3. The Johns Hopkins University Applied Physics Laboratory Laurel MD USA
4. Department of Physics and Astronomy University of Iowa Iowa City IA USA
5. Laboratory for Atmospheric and Space Physics University of Colorado Boulder Boulder CO USA
6. Laboratoire de Physique Atmosphérique et Planétaire Université de Liège Liège Belgium
7. Space Research Corporation Annapolis MD USA
8. NASA Goddard Space Flight Center Greenbelt MD USA
9. Jet Propulsion Laboratory Pasadena CA USA
10. Institut de Recherche en Astrophysique et Planétologie (IRAP) Toulouse France
11. Department of Astrophysical Sciences Princeton University Princeton NJ USA
12. Institute of Geophysics and Meteorology University of Cologne Cologne Germany