1. Space Sciences Laboratory; University of California; Berkeley California USA
2. LPC2E; University of Orleans; France
3. Institute of Geophysics and Planetary Sciences; University of California; Los Angeles CA USA
4. Space Research Institute of Russian Academy of Sciences; Moscow Russia
5. Physics Department; University of California; Berkeley CA USA
6. NASA; Goddard Space Flight Center; Greenbelt MD USA
7. University of Colorado Boulder; Boulder CO USA
8. Royal Institute of Technology; Stockholm Sweden
9. University of New Hampshire; Durham NH USA