Christopher M Fowler, Space Sciences Laboratory, Berkeley, CA, United States, Jasper S Halekas, University of Iowa, Department of Physics and Astronomy, Iowa City, IA, United States, Steven J Schwartz, Imperial College London, London, United Kingdom, Katherine Goodrich, University of Colorado Boulder, Boulder, CO, United States, Jacob Gruesbeck, University of Maryland College Park, College Park, MD, United States and Mehdi Benna, NASA Goddard Space Flight Center, Greenbelt, MD, United States