1. Center for Space Physics; Boston University; Boston MA USA
2. LATMOS/IPSL, UPMC University Paris 06 Sorbonne Universités, UVSQ, CNRS; Paris France
3. Laboratory for Atmospheric and Space Physics; University of Colorado Boulder; Boulder CO USA
4. Department of Astronomy; New Mexico State University; Las Cruces NM USA
5. Planetary Science Institute; Tucson AZ USA
6. Department of Astronomy; University of Virginia; Charlottesville VA USA
7. Southwest Research Institute; San Antonio TX USA