1. Space and Atmospheric Physics Group Blackett Laboratory Imperial College London London UK
2. Space Sciences Laboratory University of California, Berkeley Berkeley CA USA
3. Institut de Recherche en Astrophysique et Planétologie CNRS UPS, CNES Université de Toulouse Toulouse France
4. Southwest Research Institute San Antonio TX USA
5. NASA Goddard Space Flight Center Greenbelt MD USA
6. University of New Hampshire Durham NH USA
7. KTH Royal Institute of Technology Stockholm Sweden
8. LASP/Department of Astrophysical and Planetary Sciences University of Colorado Boulder CO USA
9. Institute of Geophysics Earth, Planetary, and Space Sciences University of California, Los Angeles Los Angeles CA USA