1. Embry‐Riddle Aeronautical University Daytona Beach FL USA
2. University of Alaska Fairbanks Fairbanks AK USA
3. University of Colorado Boulder Boulder CO USA
4. Institute of Geology and Geophysics Fairbanks AK USA
5. University of Maryland Baltimore MD USA
6. NASA Goddard Space Flight Center Greenbelt MD USA
7. Swedish Institute of Space Physics Uppsala Sweden