1. Space Sciences Laboratory University of California at Berkeley Berkeley CA USA
2. Department of Physics University of California at Berkeley Berkeley CA USA
3. Space Research Institute of Russian Academy of Sciences Moscow Russia
4. New Jersey Institute of Technology Newark NJ USA
5. Institute of Geophysics and Planetary Sciences University of California Los Angeles CA USA
6. Swedish Institute of Space Physics Uppsala Sweden
7. Space and Plasma Physics Department of Physics and Astronomy Uppsala University Uppsala Sweden
8. Laboratory of Atmospheric and Space Physics University of Colorado Boulder CO USA
9. NASA Goddard Space Flight Center Greenbelt MD USA
10. Royal Institute of Technology Stockholm Sweden