1. Department of Earth, Planetary, and Space Sciences University of California, Los Angeles Los Angeles CA USA
2. Department of Physics and Astronomy University of Calgary Calgary AB Canada
3. Space Research Institute of Russian Academy of Sciences Russia Moscow
4. Department of Atmospheric and Oceanic Sciences University of California, Los Angeles Los Angeles CA USA
5. Center for Space Physics Boston University Boston MA USA
6. William B. Hanson Center for Space Sciences University of Texas at Dallas Richardson TX USA
7. Geophysical Institute University of Alaska Fairbanks at Fairbanks Fairbanks AK USA