1. Center for Space Physics Boston University Boston MA USA
2. Department of Atmospheric and Oceanic Sciences University of California Los Angeles CA USA
3. William B. Hanson Center for Space Sciences University of Texas at Dallas Richardson TX USA
4. Institute for the Study of Earth, Oceans, and Space University of New Hampshire Durham NH USA
5. Department of Physics Montana State University Bozeman MT USA
6. Cooperative Institute for Research in Environmental Sciences University of Colorado Boulder Boulder CO USA