1. School of Physics and Astronomy University of Minnesota Minneapolis MN USA
2. Department of Atmospheric and Oceanic Sciences University of California Los Angeles CA USA
3. Department of Electrical and Computer Engineering and Center for Space Physics Boston University Boston MA USA
4. Los Alamos National Laboratory Los Alamos NM USA
5. Geospace Physics Laboratory NASA Goddard Space Flight Center Greenbelt MD USA
6. Department of Earth, Planetary, and Space Sciences University of California Los Angeles CA USA
7. Department of Physics and Astronomy Louisiana State University Baton Rouge LA USA