1. Department of Atmospheric and Oceanic Sciences; University of California; Los Angeles California USA
2. Department of Physics and Astronomy; University of Calgary; Calgary Alberta Canada
3. Space Sciences Laboratory; University of California; Berkeley California USA
4. Department of Earth and Space Sciences; University of California; Los Angeles California USA
5. Bradley Department of Electrical and Computer Engineering; Virginia Tech; Blacksburg Virginia USA
6. Institute for Space and Atmospheric Studies; University of Saskatchewan; Saskatoon Saskatchewan Canada