1. Department of Astrophysical Sciences Princeton University Princeton NJ USA
2. The Johns Hopkins University Applied Physics Laboratory Laurel MD USA
3. Laboratory for Atmospheric and Space Physics University of Colorado Boulder Boulder CO USA
4. Geophysical Institute University of Alaska Fairbanks Fairbanks AK USA
5. Southwest Research Institute San Antonio TX USA
6. Space Sciences Laboratory University of California Berkeley CA USA
7. Institut de Recherche en Astrophysique et Planétologie CNRS‐UPS‐CNES Toulouse France
8. Department of Physics and Astronomy University of Texas at San Antonio San Antonio TX USA