Catholic University of America, Washington, DC, United States
Johns Hopkins Univ/APL, Laurel, MD, United States
Johns Hopkins Univ/APL, Laurel, MD, United States
Johns Hopkins Univ/APL, Laurel, MD, United States
Johns Hopkins Univ/APL, Laurel, MD, United States
Johns Hopkins Univ/APL, Laurel, MD, United States; Office of Space Research and Technology, Academy of Athens, Athens, Greece
Johns Hopkins Univ/APL, Laurel, MD, United States
Department of Terrestrial Magnetism, Carnegie Institution of Washington, Washington, DC, United States; Lamont-Doherty Earth Observatory, Columbia University, Palisades, NY, United States
Laboratory for Atmospheric and Space Physics, University of Colorado, Boulder, CO, United States