作者机构:[1]School of Earth and Space Sciences, Peking University, Beijing 100871, China, [2]State Key Laboratory of Space Weather, Chinese Academy of Sciences, Beijing 100190, China, [3]School of Space Science and Physics, Shandong University at Weihai, Weihai 264209, China, [4]Space Sciences Laboratory, UC Berkeley, Berkeley, CA94720-5200, USA
相关基金:This work was supported by the National Natural Science Foundation of China (40874086 and 41031065) and the Specialized Research Fund for State Key Laboratories (08262DAA4S).