1. Planetary Magnetospheres Laboratory (695) NASA Goddard Space Flight Center Greenbelt MD USA
2. Department of Astronomy University of Maryland College Park MD USA
3. Department of Physics and Astronomy University of Iowa Iowa City Iowa USA
4. Department of Electrical Engineering and Information Science, National Institute of Technology (KOSEN) Niihama College Niihama Japan
5. Space Research Corporation Annapolis MD USA
6. Space Measurements and Instrumentation Technical University of Denmark Lyngby Denmark