Liu Yang, Peking University, Institute of Space Physics and Applied Technology, Beijing, China, Lars Berger, Institute for Experimental and Applied Physics (IEAP), Christian-Albrechts-University of Kiel, Kiel, Germany, Jia Yu, University of Kiel, Kiel, Germany, Robert F Wimmer-Schweingruber, University of Kiel, Institute for Experimental and Applied Physics, Kiel, Germany, Linghua Wang, Peking University, Beijing, China, Antoinette Broe Galvin, Univ of New Hampshire, Durham, NH, United States and Eberhard Moebius, University of New Hampshire, Durham, NH, United States