1. Laboratory for Atmospheric and Space Physics University of Colorado Boulder Boulder CO USA
2. Department of Physics and Astronomy University of Calgary Calgary Alberta Canada
3. Department of Atmospheric and Oceanic Sciences University of California Los Angeles CA USA
4. Institute of Geophysics and Planetary Physics University of California Los Angeles CA USA
5. Los Alamos National Laboratory Los Alamos NM USA
6. Department of Physics University of Minnesota, Twin Cities Minneapolis MN USA
7. Athabasca University Observatories Athabasca Alberta Canada
8. Department of Physics and Engineering Physics University of Saskatchewan Saskatoon Saskatchewan Canada
9. NASA Goddard Space Flight Center Greenbelt MD USA