1. Swedish Institute of Space Physics; Uppsala Sweden
2. Laboratoire de Physique des Plasmas (LPP), UMR7648, CNRS, Ecole Polytechnique, UPMC University Paris 06, University Paris-Sud, Observatoire de Paris; Paris France
3. Laboratory of Atmospheric and Space Physics; University of Colorado Boulder; Boulder CO USA
4. Space and Plasma Physics, School of Electrical Engineering; KTH Royal Institute of Technology; Stockholm Sweden
5. NASA Goddard Space Flight Center; Greenbelt MD USA
6. Department of Astronomy; University of Maryland; College Park MD USA
7. Space Research Institute; Austrian Academy of Sciences; Graz Austria
8. Department of Earth and Space Sciences; University of California; Los Angeles CA USA
9. Southwest Research Institute; San Antonio TX USA
10. Space Science Center; University of New Hampshire; Durham NH USA