1. Department of Physics Augsburg University Minneapolis MN USA
2. Center for Space Physics Boston University Boston MA USA
3. Department of Atmospheric and Oceanic Sciences University of California Los Angeles CA USA
4. Institute for the Study of the Earth, Oceans, and Space University of New Hampshire Durham NH USA
5. NASA/Goddard Space Flight Center Greenbelt MD USA
6. Department of Physics and Astronomy University of Iowa Iowa City IA USA
7. School of Physics and Astronomy University of Minnesota Minneapolis MN USA
8. Laboratory for Atmospheric and Space Physics University of Colorado Boulder Boulder CO USA
9. The Aerospace Corporation Los Angeles CA USA
10. NOAA Space Weather Prediction Center Boulder CO USA
11. British Antarctic Survey Cambridge UK
12. Sodankylä Geophysical Observatory Sodankylä Finland
13. Institute for Space-Earth Environmental Research Nagoya University Nagoya Japan
14. Institute of Solar‐Terrestrial Physics Irkutsk Russia
15. Borok Geophysical Observatory Borok Russia
16. Radiophysical Research Institute Lobachevsky State University Nizhny Novgorod Russia