1. The Johns Hopkins University Applied Physics Laboratory; Laurel Maryland USA
2. Space Science Center; University of New Hampshire; Durham New Hampshire USA
3. Department of Astronomy; University of Maryland; College Park Maryland USA
4. The Aerospace Corporation; El Segundo California USA
5. Laboratory for Atmospheric and Space Physics; University of Colorado Boulder; Boulder Colorado USA
6. Center for Solar-Terrestrial Research; New Jersey Institute of Technology; Newark New Jersey USA
7. Southwest Research Institute; San Antonio Texas USA
8. Department of Physics and Astronomy; University of Texas at San Antonio; San Antonio Texas USA