1. Applied Physics Laboratory Johns Hopkins University Laurel MD USA
2. Department of Astrophysical Sciences Princeton University Princeton NJ USA
3. Department of Physics and Astronomy University of Iowa Iowa City IA USA
4. NASA Goddard Space Flight Center Greenbelt MD USA
5. Institute of Geophysics and Meteorology University of Cologne Cologne Germany
6. Southwest Research Institute San Antonio TX USA
7. Department of Physics and Astronomy University of Texas at San Antonio San Antonio TX USA
8. Laboratory for Atmospheric and Space Physics University of Colorado Boulder CO USA
9. Space Research Corporation Annapolis MD USA
10. Department of Electrical Engineering and Information Science, National Institute of Technology (KOSEN) Niihama College Niihama Japan
11. National Space Institute Measurement and Instrumentation Systems, DTU Kongens Lyngby Denmark