1. NASA Goddard Space Flight Center Greenbelt Maryland 20771 USA
2. Princeton University Princeton New Jersey 08544 USA
3. Applied Physics Laboratory Johns Hopkins University Laurel Maryland 20723 USA
4. LASP University of Colorado Boulder Colorado 80303 USA
5. Smead Aerospace Sciences University of Colorado Boulder Colorado 80309 USA
6. Physics Department University of Colorado Boulder Colorado 80309 USA