1. CSPAR, University of Alabama in Huntsville; Huntsville; Alabama; USA
2. Space Science Office; NASA Marshall Space Flight Center; Huntsville; Alabama; USA
3. ISR-1, Los Alamos National Laboratory; Los Alamos; New Mexico; USA
4. Universities Space Research Association; Huntsville; Alabama; USA
5. Max-Planck Institut für extraterrestrische Physik; Garching; Germany
6. Physics and Space Sciences; Florida Institute of Technology; Melbourne; Florida; USA
7. Department of Physics; University of California; Santa Cruz; California; USA