1. Department of Physics; Augsburg College; Minneapolis Minnesota USA
2. Laboratory for Atmospheric and Space Physics; University of Colorado; Boulder Colorado USA
3. Applied Physics Laboratory; Johns Hopkins University; Laurel Maryland USA
4. Institute for Geophysics and Planetary Physics; University of California; Los Angeles California USA
5. NOAA Space Environment Center; Boulder Colorado USA
6. Space Science Center; University of New Hampshire; Durham New Hampshire USA
7. Faculty of Science; Tohoku University; Sendai Japan