1. Goddard Planetary Heliophysics Institute University of Maryland, Baltimore County Baltimore Maryland USA
2. Heliophysics Science Division NASA Goddard Space Flight Center Greenbelt Maryland USA
3. Princeton Center for Heliophysics and Princeton Plasma Physics Laboratory Princeton University Princeton New Jersey USA
4. Department of Atmospheric, Oceanic and Space Sciences University of Michigan Ann Arbor Michigan USA
5. Geospace Physics Laboratory NASA Goddard Space Flight Center Greenbelt Maryland USA
6. Johns Hopkins University Applied Physics Laboratory Laurel Maryland USA
7. School of Physics and Astronomy Queen Mary University of London London UK
8. Department of Physics University of California Los Angeles California USA
9. Space Science Laboratory University of California Berkeley California USA