Deeper and earlier penetrations of oxygen ions than protons into the inner magnetosphere Observed by Van Allen probes.
Kenji Mitani, Nagoya-university, Institute for Space-Earth Environmental Research, Nagoya city, Japan, Kanako Seki, The University of Tokyo, Research Center for Advanced Science and Technology, Tokyo, Japan, Kunihiro Keika, University of Tokyo, Graduate School of Science, Bunkyo-ku, Japan, Louis J Lanzerotti, New Jersey Institute of Technology, Center for Solar-Terrestrial Research, Newark, NJ, United States, Matina Gkioulidou, Johns Hopkins Applied Physics Laboratory, Laurel, United States, Donald G Mitchell, JHU/APL, Laurel, MD, United States and Craig Kletzing, University of Iowa, Physics and Astronomy, Iowa City, United States
