1. Department of Physics; Auburn University; Auburn Alabama USA
2. Department of Atmospheric and Oceanic Sciences; University of California; Los Angeles California USA
3. Department of Physics and Astronomy; Dartmouth College; Hanover New Hampshire USA
4. Johns Hopkins University Applied Physics Laboratory; Laurel Maryland USA
5. School of Space Research; Kyung Hee University; Yongin Korea
6. Space Weather Prediction Center; NOAA; Boulder Colorado USA