@article{oai:nipr.repo.nii.ac.jp:00004062, author = {Yumoto, Kiyohumi and Takahashi, Kazue}, journal = {Proceedings of the NIPR Symposium on Upper Atmosphere Physics}, month = {Nov}, note = {P(論文), In order to investigate relations between low-latitude Pi 1-2 pulsations on the ground and substorm-associated variations in space, we analyzed magnetic data from the conjugate area of L=1.3-2.1 and λ~140°E, and from AMPTE/CCE in the midnight sector during August 9 to September 4,1986. From the correlation analysis, most of low-latitude Pi pulsations are found to occur within +1 to -2 min of the onsets of substorm-associated dipolarizations at geocentric distances of 8-9 R_E in the magnetotail. The dipolarizations appear to be localized in the magnetotail, because the orbiting spacecraft often cannot detect a dipolarization corresponding to an obvious Pi 2 on the grouud.}, pages = {38--46}, title = {Relation between Pi 2 magnetic pulsations at L=1.3-2.1 and dipolarizations at AMPTE/CCE}, volume = {2}, year = {1989} }