1. Laboratory for Atmospheric and Space Physics; University of Colorado Boulder; Boulder Colorado USA
2. Space Sciences Department; The Aerospace Corporation; El Segundo California USA
3. Department of Radio Science and Engineering; Aalto University; Helsinki Finland
4. The Johns Hopkins University Applied Physics Laboratory; Laurel Maryland USA
5. Los Alamos National Laboratory; Los Alamos New Mexico USA
6. NASA Goddard Space Flight Center; Greenbelt Maryland USA
7. Space Science Center; University of New Hampshire; Durham New Hampshire USA
8. Southwest Research Institute; San Antonio Texas USA