Characteristics of ring current protons and oxygen ions during the 7 January 2015 and 17 March 2015 storms: Van Allen Probes/RBSPICE observations

Kunihiro Keika, The University of Tokyo, Department of Earth and Planetary Science, Tokyo, Japan, Kanako Seki, University of Tokyo, Graduate School of Science, Bunkyo-ku, Japan, Masahito Nosé, Kyoto University, Graduate School of Science, Kyoto, Japan, Shinobu Machida, Nagoya University, Institute for Space-Earth Environmental Research, Nagoya, Japan, Yoshizumi Miyoshi, ISEE, Nagoya University, Nagoya, Japan, Louis J Lanzerotti, New Jersey Institute of Technology, Center for Solar-Terrestrial Research, Newark, NJ, United States, Donald G Mitchell, JHU/APL, Laurel, MD, United States, Matina Gkioulidou, Applied Physics Laboratory Johns Hopkins, Laurel, MD, United States, Andrew J Gerrard, New Jersey Institute of Technology, Edison, NJ, United States and Jerry Wayne Manweiler, Fundamental Technologies, LLC, Lawrence, KS, United States