Item type |
紀要論文(ELS) / Departmental Bulletin Paper(1) |
公開日 |
1984-07-01 |
タイトル |
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言語 |
en |
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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 |
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言語 |
eng |
資源タイプ |
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資源タイプ識別子 |
http://purl.org/coar/resource_type/c_6501 |
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資源タイプ |
departmental bulletin paper |
ページ属性 |
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内容記述タイプ |
Other |
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内容記述 |
P(論文) |
著者名(英) |
Sakurai, Tohru
Tonegawa, Yutaka
Tomomura, Kiyoshi
Kato, Yoshio
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著者所属(英) |
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en |
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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) |
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内容記述タイプ |
Other |
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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 |
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収録物識別子タイプ |
NCID |
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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
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