1. Department of Astronomy; University of Maryland, College Park; College Park Maryland USA
2. NASA Goddard Spaceflight Center; Greenbelt Maryland USA
3. Universities Space Research Association; Columbia Maryland USA
4. Space Research Corporation; Annapolis Maryland USA
5. Department of Physics and Astronomy; University of Iowa; Iowa City Iowa USA
6. Southwest Research Institute; San Antonio Texas USA
7. Department of Physics and Astronomy; University of Texas at San Antonio; San Antonio Texas USA
8. Department of Astrophysical Sciences; Princeton University; Princeton New Jersey USA
9. Office of the VP for the Princeton Plasma Physics Laboratory; Princeton University; Princeton New Jersey USA
10. Laboratory for Atmospheric and Space Physics; University of Colorado Boulder; Boulder Colorado USA
11. Jet Propulsion Laboratory; Pasadena California USA