1. NASA/Marshall Space Flight Huntsville AL USA
2. Laboratory for Atmospheric and Space Physics Boulder CO USA
3. Imperial College London London UK
4. UMD College Park MD USA
5. NASA Goddard Space Flight Center Greenbelt MD USA
6. University of Alaska Fairbanks Geophysical Institute Fairbanks AK USA
7. Southwest Research Institute San Antonio TX USA
8. University of California Los Angeles Los Angeles CA USA
9. University of New Hampshire Durham NH USA