@article{oai:jaxa.repo.nii.ac.jp:00025797, author = {堀, 智昭 and 大谷, 晋一 and Lui, A. T. Y. and McEntire, R. W. and 前澤, 洌 and 齋藤, 義文 and 向井, 利典 and Hori, T. and Ohtani, S. and Lui, A. T. Y. and McEntire, R. W. and Maezawa, Kiyoshi and Saito, Yoshifumi and Mukai, Toshifumi}, issue = {6}, journal = {Geophysical Research Letters}, month = {}, note = {Accepted: 2003-02-24, 資料番号: SA1002499000}, title = {A Substorm-Associated Drift Echo of Energetic Protons Observed by GEOTAIL: Radial Density Gradient Structure}, volume = {30}, year = {2003} }