1. Johns Hopkins University Applied Physics Laboratory; Laurel Maryland USA
2. Space Sciences Laboratory; University of California; Berkeley California USA
3. Institut für Geophysik und Extraterrestrische Physik; Technical University of Braunschweig; Braunschweig Germany
4. Institute of Geophysics and Planetary Physics; University of California; Los Angeles California USA
5. National Oceanic and Atmospheric Administration/National Weather Service; National Centers for Environmental Prediction, Space Weather Prediction Center; Boulder Colorado USA
6. Department of Physics and Astronomy; Dartmouth College; Hanover New Hampshire USA
7. Department of Atmospheric and Oceanic Sciences; University of California; Los Angeles California USA
8. School of Space Research; Kyung Hee University, Yongin; South Korea
9. Data Analysis Center for Geomagnetism and Space Magnetism, Graduate School of Science; Kyoto University; Kyoto Japan
10. Laboratory for Atmospheric and Space Physics; University of Colorado at Boulder; Boulder Colorado USA