Simultaneous observation of geomagnetic sudden commencement above and below the ionosphere
スポンサーリンク
概要
- 論文の詳細を見る
A geomagnetic sudden commencement (SC) was observed by the low altitude geomagnetic satellite, MAGSAT, when it was flying very closely above a ground station (Magadan in east Siberia, geomagnetic latitude=51.1°) in a duskside (16-17h LT) meridian. The H-component at the satellite showed a positive pulse of 52nT and the D-component a negative pulse of 43nT in the beginning part of the SC. The duration of the pulse was 2-3min. The SC observed by normal-run magnetographs at Magadan and other ground stations near the satellite orbit was preceded by a typical preliminary impulse (PI) of which sense is opposite to that of the pulse observed by MAGSAT. By the use of high time resolution data from the IMS magnetometer network Alaska chain, the pulse detected by MAGSAT was identified with the PI observed at the ground stations. It was concluded that the main source current for the PI flowed between the satellite and the ground, that is, in the ionosphere, but effects of other source currents including field aligned currents should be taken into account.
- 国立極地研究所の論文
著者
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IYEMORI Toshihiko
Data Analysis Center for Geomagnetism and Space Magnetism, Garaduate School of Science, Kyoto Univer
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Araki T
Data Analysis Center For Geomagnetism And Spacemagnetism Faculty Of Science Kyoto University
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Araki T
Department Of Geophysics Faculty Of Science Kyoto University
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Araki Tohru
Data Analysis Center for Geomagnetism and Spacemagnetism, Faculty of Science, Kyoto University
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Kamei Toyohisa
Dataanalysis Center For Geomagnetism And Space Magnetism Kyoto University
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Iyemori Toshihiko
DataAnalysis Center for Geomagnetism and Space Magnetism, Kyoto University
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Kamei Toyohisa
Data Analysis Center for Geomagnetism and Spacemagnetism, Faculty of Science, Kyoto University
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Ikeda Tatsuya
Data Analysis Center For Geomagnetism And Spacemagnetism Faculty Of Science Kyoto University
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Kamei Toyohisa
Data Analysis Center For Geomagnetism And Space Magnetism Kyoto University
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Iyemori T
Kyoto Univ. Kyoto Jpn
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Iyemori Toshihiko
Data Analysis Center For Geomagnetism And Space Magnetism Garaduate School Of Science Kyoto Universi
関連論文
- Local time dependence of the dominant frequency of Pi2 pulsations at mid-and low-latitudes
- Characteristics of CNA associated with geomagnetic sudden commencements
- Geomagnetic sudden commencements observed at the Syowa-Iceland conjugate stations
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- Characteristics of polarization of geomagnetic sudden commencements at geostationary orbit
- Structure of large amplitude abrupt magnetic variations observed by the MAGSAT
- Characteristics of small-scale magnetic fluctuations over the high-latitude ionosphere
- Derivation of polar cap AE indices
- Simultaneous observation of geomagnetic sudden commencement above and below the ionosphere
- Characteristics of solar flare effect in the high-latitude ionosphere as observed by the SuperDARN radars