1. Southwest Research Institute; San Antonio Texas USA
2. University of Texas at San Antonio; San Antonio Texas USA
3. Space Research Institute; Austrian Academy of Sciences; Graz Austria
4. The Johns Hopkins University Applied Physics Laboratory; Laurel Maryland USA
5. Laboratory for Atmospheric and Space Physics; University of Colorado Boulder; Boulder Colorado USA
6. Advanced Technology Center, Lockheed Martin; Palo Alto California USA
7. Institut de Recherche en Astrophysique et Plantologie; Université de Toulouse; Toulouse France
8. Centre National de la Recherche Scientifique; Toulouse France
9. Department of Earth and Space Sciences; University of California; Los Angeles California USA