1. Department of Atmospheric and Oceanic Sciences; University of California; Los Angeles California USA
2. Center for Geospace Studies; SRI International; Menlo Park California USA
3. Geophysical Institute; University of Alaska Fairbanks; Fairbanks Alaska USA
4. Department of Space Science and Engineering; Southwest Research Institute; San Antonio Texas USA
5. Department of Physics and Astronomy; University of Calgary; Calgary Alberta Canada
6. Department of Earth and Space Sciences; University of California; Los Angeles California USA
7. Space Science Laboratory; University of California; Berkeley California USA