[Yang, Chang; Liu, Si; He, Yihua; Xiao, Fuliang; Zhou, Qinghua] Changsha Univ Sci & Technol, Sch Phys & Elect Sci, Changsha, Hunan, Peoples R China.
[Tao, Xin; Su, Zhenpeng; Gao, Zhonglei] Univ Sci & Technol China, Chinese Acad Sci, Key Lab Basic Plasma Phys, Hefei, Peoples R China.
[He, Zhaoguo] Harbin Inst Technol, Shenzhen Grad Sch, Shenzhen, Peoples R China.
[Baker, D. N.] Univ Colorado, Lab Atmospher & Space Phys, Boulder, CO 80309 USA.
[Spence, H. E.] Univ New Hampshire, Inst Study Earth Oceans & Space, Durham, NH 03824 USA.