1. University of Colorado, Laboratory for Atmospheric and Space Physics, Boulder, Colorado, United States
2. Space Telescope Science Institute, Baltimore, Maryland, United States
3. University of Arizona, Department of Astronomy and Steward Observatory, Tucson, Arizona, United States
4. Johns Hopkins University, Department of Physics and Astronomy, Baltimore, Maryland, United States
5. NASA/Goddard Space Flight Center, Greenbelt, Maryland, United States
6. Arizona State University, School of Earth and Space Exploration, Tempe, Arizona, United States
7. University of Washington, Department of Astronomy, Seattle, Washington, United States