1. University of California Los Angeles Los Angeles CA USA
2. University of Colorado at Boulder, Laboratory for Atmospheric and Space Physics Boulder CO USA
3. Space Science Institute Boulder CO USA
4. Department of Physics Auburn University Auburn AL USA
5. University of California, Space Sciences Laboratory Berkeley CA USA
6. Department of Physics and Astronomy Dartmouth College Hanover NH USA
7. National Center for Atmospheric Research High Altitude Observatory Boulder CO USA
8. GFZ German Centre for Geosciences Potsdam Germany
9. Department of Physics University of Alberta Edmonton AB Canada
10. Department of Physics & Astronomy University of Iowa Iowa City IA USA