标题：Examination of the Odd Mode Model of Pi 2 Based on an Analysis of ULF Signals Received at Syowa Station (d. ULF Waves in the Magnetosphere) (Proceedings of the Second Symposium on Coordinated Observations of the Ionosphere and Magnetosphere in the Polar R
其他标题：昭和基地のULF波動解析に基づくPe 2型磁気脈動に関するOdd Modeのモデルの検証(d.磁気圏内のULF波動)(第2回極域における電離圏磁気圏総合観測シンポジウム : Part I)
摘要：A correlation analysis of hissagram, auroraeram, and magnetogram obtained from the Syowa Station data implies that magnetic Pi 2 pulsation is closely related to the onset mechanism of magnetosphenc substorm. Even at the polar station, Syowa, the Pi 2 component is clearly detected on hissagrams which are obtained by reproducing the original ULF signals by an FM tape recorder with a speed-up ratio of as much as 2×10^4. Based on summarized morphological characteristics of Pi 2, we confirmed the odd mode model of Pi 2 that the fundamental odd mode Alfven wave along a field line anchored in the midnight auroral oval is observed on the earth's surface as Pi 2. A rapid changing of the tail field configuration at the time of substorm onset is suggested.
