1. Laboratory for Atmospheric and Space Physics; University of Colorado Boulder; Boulder Colorado USA
2. Geophysical Institute; University of Alaska Fairbanks; Fairbanks Alaska USA
3. Space Science and Engineering Division; Southwest Research Institute; San Antonio Texas USA
4. Applied Physics Laboratory; The Johns Hopkins University; Laurel Maryland USA
5. Center for Space Research; University of Texas at San Antonio; San Antonio Texas USA
6. Space Science Center; Massachusetts Institute of Technology; Cambridge Maryland USA
7. Department of Physics and Astronomy; University of New Hampshire; Durham New Hampshire USA
8. Earth and Planetary Sciences; The Johns Hopkins University; Baltimore Maryland USA