1. Space Physics Laboratory, Vikram Sarabhai Space Centre, Trivandrum 695022, India
2. NASA Marshall Space Flight Center, Huntsville, AL 35805, USA
3. Southwest Research Institute, San Antonio, TX 78228-0510, USA
4. Mullard Space Science Laboratory, University College London, UK
5. MPI für extraterrestrische Physik, Garching, Germany
6. Applied Physics Laboratory, John Hopkins University, Laurel, MD 20723, USA
7. Department of Physics and Astronomy, University of Kansas, Lawrence, KS 66045, USA
8. Department of Physics and Technology, University of Bergen, Bergen, Norway
9. Lockheed Martin Advanced Technology Center, Palo Alto, CA 94304, USA
10. Harvard-Smithsonian Center for Astrophysics, Cambridge, MA 02138, USA
11. Space Sciences Laboratory, University of California, Berkeley, CA 94720, USA
12. NASA Goddard Space Flight center, Greenbelt, MD 20771, USA