1. Department of Physics Augsburg University Minneapolis MN USA
2. Now at NASA/Goddard Space Flight Center Greenbelt MD USA
3. Space Research Institute Moscow Russia
4. Department of Climate and Space Sciences and Engineering University of Michigan Ann Arbor MI USA
5. Athabasca University Observatories Athabasca University Athabasca AB Canada
6. Geomagnetic Laboratory Natural Resources Canada Ottawa ON Canada
7. Department of Earth Planetary and Space Sciences University of California Los Angeles CA USA
8. Bradley Department of Electrical and Computer Engineering Virginia Tech Blacksburg VA USA
9. Johns Hopkins University Applied Physics Laboratory Laurel MD USA
10. Department of Physics and Technology University of Bergen Norway