1. The Blackett Laboratory Imperial College London London UK
2. School of Physics and Astronomy University of Southampton Southampton UK
3. Laboratory for Atmospheric and Space Physics University of Colorado Boulder Boulder CO USA
4. Southwest Research Institute San Antonio TX USA
5. NASA Goddard Space Flight Center Greenbelt MD USA
6. Swedish Institute of Space Physics (Uppsala) Uppsala Sweden
7. Institut de Recherche en Astrophysique et Planétologie, CNRS, UPS, CNES, Université de Toulouse Toulouse France
8. Space Science Laboratory University of California Berkeley CA USA
9. Institute of Geophysics and Planetary Physics University of California Los Angeles CA USA
10. Space Science Center University of New Hampshire Durham NH USA