The Johns Hopkins University Applied Physics Laboratory, Laurel, MD, USA;
Institute for Geophysics and Extraterrestrial Physics, Technical University of Braunschweig, Braunschweig, Germany;
Institute of Geophysics and Planetary Physics and Department of Earth and Space Sciences, University of California, Los Angeles, CA, USA;
Space Sciences Laboratory, University of California, Berkeley, CA, USA;
Department of Atmospheric and Oceanic Sciences, University of California, Los Angeles, CA, USA;
National Centers for Environmental Prediction, Space Weather Prediction Center, National Oceanic and Atmospheric Administration/National Weather Service, Boulder, CO, USA;
Institute of Geophysics and Planetary Physics and Department of Earth and Space Sciences, University of California, Los Angeles, CA, USA;