1. Laboratory for Atmospheric and Space Physics University of Colorado Boulder CO USA
2. Department of Astrophysical and Planetary Sciences University of Colorado Boulder CO USA
3. Department of Physics and Astronomy Rice University Houston TX USA
4. LPP, CNRS, Ecole Polytechnique, Sorbonne Université, Univ. Paris Sud, Observatoire de Paris Paris France
5. Southwest Research Institute San Antonio TX USA
6. Department of Physics University of New Hampshire Durham NH USA
7. Department of Earth, Planetary and Space Sciences University of California Los Angeles Los Angeles CA USA
8. NASA Goddard Space Flight Center Greenbelt MD USA