The Johns Hopkins University Applied Physics Laboratory, Laurel, MD, United States
Saint Petersburg State University, Saint Petersburg, Russia
University of British Columbia, Vancouver, BC, Canada; Planetary Science Institute Tucson, Tucson, AZ, United States
University of British Columbia, Vancouver, BC, Canada
The Johns Hopkins University Applied Physics Laboratory, 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
The Johns Hopkins University Applied Physics Laboratory, Laurel, MD, United States