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. Institute of Geophysics and Planetary Physics University of California Los Angeles CA USA
4. CEA, DAM, DIF Arpajon France
5. Department of Physics and Astronomy University of Iowa Iowa City IA USA
6. Space Science and Applications Group Los Alamos National Laboratory Los Alamos NM USA
7. Institute for the Study of Earth, Oceans, and Space University of New Hampshire Durham NH USA
8. School of Physics and Astronomy University of Minnesota, Twin Cities Minneapolis MN USA