1. Department of Electrical and Computer Engineering and Center for Space Physics Boston University Boston MA USA
2. Space Science Center University of New Hampshire Durham NH USA
3. SRI International Menlo Park CA USA
4. Department of Physics and Astronomy University of Calgary Calgary Alberta Canada
5. MIT Haystack Observatory Westford MA USA
6. Institute for Space Earth Environmental Research Nagoya University Nagoya Japan
7. Geophysical Institute University of Alaska Fairbanks Fairbanks AK USA