1. Physics Department; University of New Brunswick; Fredericton; New Brunswick; Canada
2. Department of Physics and Astronomy; University of Alberta; Edmonton; Alberta; Canada
3. Department of Physics and Astronomy; University of Western Ontario; London; Ontario; Canada
4. Geomagnetic Laboratory; Natural Resources Canada; Ottawa; Ontario; Canada
5. Communications Research Centre; Ottawa; Ontario; Canada
6. Solar Terrestrial Environment Laboratory; Nagoya University; Nagoya; Japan