1. Department of Atmospheric and Oceanic Sciences University of California Los Angeles CA USA
2. Center for Space Physics Boston University Boston MA USA
3. Geophysical Institute and Physics Department University of Alaska Fairbanks Fairbanks AK USA
4. Department of Earth, Planetary and Space Sciences University of California Los Angeles CA USA
5. Department of Physics and Astronomy University of Iowa Iowa City IA USA
6. Space Sciences Department The Aerospace Corporation Los Angeles CA USA
7. Space Science and Applications Group Los Alamos National Laboratory Los Alamos NM USA
8. Institute for the Study of Earth, Oceans, and Space University of New Hampshire Durham NH USA