@article{oai:jaxa.repo.nii.ac.jp:00025795, author = {岡, 光夫 and 寺沢, 敏夫 and 野田, 寛大 and 齋藤, 義文 and 向井, 利典 and Oka, M. and Terasawa, T. and Noda, H. and Saito, Yoshifumi and Mukai, Toshifumi}, issue = {12}, journal = {Geophysical Research Letters}, month = {}, note = {Accepted: 2002-05-02, 資料番号: SA1002497000}, title = {'Torus' distribution of interstellar helium pickup ions: Direct observation}, volume = {29}, year = {2002} }