1. Heliophysics Science Division NASA Goddard Space Flight Center Greenbelt Maryland USA
2. Department of Earth, Planetary, and Space Sciences and Institute of Geophysics and Planetary Physics University of California Los Angeles California USA
3. Department of Climate and Space Sciences & Engineering University of Michigan Ann Arbor Michigan USA
4. The Johns Hopkins University Applied Physics Laboratory Laurel Maryland USA
5. NOAA Space Weather Prediction Center Boulder Colorado USA
6. Space Research Institute, Austrian Academy of Sciences Graz Austria
7. Physics Department University of New Hampshire Durham New Hampshire USA