Jie Ren, Peking University, Beijing, China, Q. -G. Zong, Peking University, Institute of space physics and applied technology school of Earth and Space Sciences,, Beijing, China, Xuzhi Zhou, Peking University, School of Earth and Space Sciences, Beijing, China, Harlan E. Spence, University of New Hampshire, Durham, NH, United States, Herbert O Funsten, Los Alamos National Laboratory, Los Alamos, NM, United States, John R Wygant, University of Minnesota, Minneapolis, MN, United States and Robert Rankin, University of Alberta, Department of Physics, Edmonton, AB, Canada