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Pc 1 pulsations observed at Cambridge Bay in the cusp region and Fort Smith in the auroral region
https://doi.org/10.15094/00001991
https://doi.org/10.15094/0000199128dd298f-7625-42c0-a853-33afe97be266
名前 / ファイル | ライセンス | アクション |
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KJ00000012545 (829.9 kB)
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Item type | 紀要論文(ELS) / Departmental Bulletin Paper(1) | |||||
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公開日 | 1986-08-01 | |||||
タイトル | ||||||
タイトル | Pc 1 pulsations observed at Cambridge Bay in the cusp region and Fort Smith in the auroral region | |||||
言語 | ||||||
言語 | eng | |||||
資源タイプ | ||||||
資源タイプ識別子 | http://purl.org/coar/resource_type/c_6501 | |||||
資源タイプ | departmental bulletin paper | |||||
ID登録 | ||||||
ID登録 | 10.15094/00001991 | |||||
ID登録タイプ | JaLC | |||||
ページ属性 | ||||||
内容記述タイプ | Other | |||||
内容記述 | P(論文) | |||||
著者名(英) |
Kato, Yoshio
× Kato, Yoshio× Tonegawa, Yutaka |
|||||
著者所属(英) | ||||||
en | ||||||
Faculty of Science, Tohoku University | ||||||
著者所属(英) | ||||||
en | ||||||
Department of Aeronautics and Astronautics, Tokai University | ||||||
抄録(英) | ||||||
内容記述タイプ | Other | |||||
内容記述 | In order to understand the generation mechanism of daytime Pc 1 magnetic pulsations with 0.3-0.7Hz in the polar cusp and auroral regions, the authors analyzed the dynamic power spectra of the magnetic pulsations observed by the high sensitive induction magnetometer at Cmabridge Bay (Φ=76.8°⩘=299.6°) and Fort Smith (67.3°, 300.0°) during the period from 14 to 30 August 1974. It is found that Pc 1 pulsations having a patch-like structure were detected at Cambridge Bay in the cusp region near local noon, but were not observed at Fort Smith in the auroral region. On the other hand, during the period from 1300 to 1500 local time (LT) Pc 1 pulsations showing rising frequency with time appeared at Fort Smith in the sub-cleft region, while Pc 1 pulsations having rather stationary frequency were observed simultaneously at Cambridge Bay in the polar cusp region. After 1500LT, the patch-like Pc 1 pulsations disappeared at Cambridge Bay. From the spectrum analysis, a possible model for mechanism of excitation and propagation of daytime Pc 1 is proposed as follows; Pc 1 pulsations observed in the cusp region are the ion cyclotron wave which is excited near the dayside cusp magnetosheath boundary and propagates along the open field lines in the dayside cusp region. On the other hand, Pc 1 pulsations at Fort Smith in the auroral or sub-cleft region are the ion cyclotron wave, generated in the entry layer where the magnetic field is more intense than that in the magnetosheath. | |||||
雑誌書誌ID | ||||||
収録物識別子タイプ | NCID | |||||
収録物識別子 | AA00733561 | |||||
書誌情報 |
Memoirs of National Institute of Polar Research. Special issue 巻 42, p. 52-57, 発行日 1986-08 |
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出版者 | ||||||
出版者 | National Institute of Polar Research |