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The oscillations exhibited dampedtype, quasi-sinusoidal oscillations. They were purely transverse and azimuthally polarized, indicating a toroidal mode oscillation. The characteristics of the pure toroidal mode oscillation were emphasized with a drastic change of the oscillation component of the magnetic field perturbation from the radial (V) to the azimuthal (D) direction in association with the SSC. The oscillations appeared as a harmonic structure in the frequency. The dominant harmonics were odd ones, i. e. 1st, 3rd, etc. Furthermore, the frequencies of the harmonics observed at each satellite showed a clear local time dependence. 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A multi-satellite study of magnetic pulsations associated with a storm sudden commencement (SSC) as observed at syochronous orbit
https://nipr.repo.nii.ac.jp/records/1588
https://nipr.repo.nii.ac.jp/records/1588cfa5d977-040d-4e87-825a-955688ebfb7d
名前 / ファイル | ライセンス | アクション |
---|---|---|
KJ00000012221 (1.9 MB)
|
Item type | 紀要論文(ELS) / Departmental Bulletin Paper(1) | |||||
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公開日 | 1984-07-01 | |||||
タイトル | ||||||
言語 | en | |||||
タイトル | A multi-satellite study of magnetic pulsations associated with a storm sudden commencement (SSC) as observed at syochronous orbit | |||||
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 | |||||
ページ属性 | ||||||
内容記述タイプ | Other | |||||
内容記述 | P(論文) | |||||
著者名(英) |
Sakurai, Tohru
× Sakurai, Tohru× Tonegawa, Yutaka× Tomomura, Kiyoshi× Kato, Yoshio |
|||||
著者所属(英) | ||||||
en | ||||||
Department of Aeronautics and Astronautics, Tokai University/Department of Aeronautics and Astronautics, Tokai University/Department of Aeronautics and Astronautics, Tokai University/Department of Aeronautics and Astronautics, Tokai University | ||||||
抄録(英) | ||||||
内容記述タイプ | Other | |||||
内容記述 | Oscillation characteristics of ultra-low frequency (ULF) hydromagnetic waves at synchronous orbit in response to a storm sudden commencement (SSC) are studied on the basis of the magnetic field observed on March 23,1975,simultaneously by the three synchronous satellites, SMS-1,SMS-2 and ATS-6,20 degrees apart from one another in longitude. The oscillations exhibited dampedtype, quasi-sinusoidal oscillations. They were purely transverse and azimuthally polarized, indicating a toroidal mode oscillation. The characteristics of the pure toroidal mode oscillation were emphasized with a drastic change of the oscillation component of the magnetic field perturbation from the radial (V) to the azimuthal (D) direction in association with the SSC. The oscillations appeared as a harmonic structure in the frequency. The dominant harmonics were odd ones, i. e. 1st, 3rd, etc. Furthermore, the frequencies of the harmonics observed at each satellite showed a clear local time dependence. In conclusion, the present study verifies that the ULF waves in association with the SSC on March 23,1975 in the afternoonside of the magnetosphere behaved as a clear standing oscillation of toroidal mode of the field line resonance excited by the SSC. | |||||
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 31, p. 1-11, 発行日 1984-07 |