1. Space Science and Engineering Division; Southwest Research Institute; San Antonio Texas USA
2. Dipartimento di Astronomia e Scienza del Spazio; Università degli Studi di Firenze; Florence Italy
3. Jet Propulsion Laboratory; Pasadena California USA
4. Department of Physics; Montana State University; Bozeman Montana USA
5. Processes, Materials and Solar Energy; CNRS; Font-Romeu France
6. Institut für Astrophysik; Georg-August-Universität Göttingen; Göttingen Germany
7. Science Applications International Corporation; Fountain Valley California USA
8. Los Alamos National Laboratory; Los Alamos New Mexico USA
9. Department of Physics; University of Maryland; College Park Maryland USA
10. Institute for Astronomy; University of Hawaii at Manoa; Honolulu USA
11. Space Studies Department; Southwest Research Institute; Boulder Colorado USA
12. Department of Earth and Planetary Sciences; Kobe University; Kobe Japan
13. Bartol Research Institute; University of Delaware; Newark Delaware USA
14. Johns Hopkins University Applied Physics Laboratory; Laurel Maryland USA
15. Space Radiation Laboratory; California Institute of Technology; Pasadena California USA
16. Physics Department; Catholic University of America; Washington, D. C. USA
17. NASA Goddard Space Flight Center; Greenbelt Maryland USA
18. Department of Earth, Oceans and Space; University of New Hampshire; Durham New Hampshire USA
19. Department of Atmospheric, Oceanic, and Space Science; University of Michigan; Ann Arbor Michigan USA