Dipolarization observed by TC1 and ClusterII during substorm in Sep. 14, 2004 - Cao, X; Pu, Z-Y; Zhang, H; Fu, S-Y; Ma, Z-W; Xiao, C-J; Liu, Z-X; Xie, L; Dunlpo, MW; Korth, A; Frazen, M; Zong, QG; et al. (CHINESE JOURNAL OF GEOPHYSICS-CHINESE EDITION, 2007)