1. Department of Electrical and Computer Engineering and Center for Space Physics Boston University Boston MA USA
2. Haystack Observatory Massachusetts Institute of Technology Cambridge MA USA
3. Physics Department University of New Brunswick Fredericton NB Canada
4. Institute for Scientific Research Boston College Chestnut Hill MA USA
5. Department of Physics and Astronomy University of Calgary Calgary AB Canada
6. Institute for Space Earth Environmental Research Nagoya University Nagoya Japan
7. Bradley Department of Electrical and Computer Engineering Virginia Tech Blacksburg VA USA