50MHz auroral doppler radar observations associated with Pc 5 geomagnetic pulsations
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概要
- 論文の詳細を見る
Radio auroral echo oscillations associated with Pc 5 geomagnetic pulsations are investigated using the 50MHz doppler radar installed in 1982 at Syowa Station, Antarctica. First, it is found that Pc 5 radar echo pulsations occur most frequently around dawn and dusk hours but do not appear around noon and midnight. Then, the doppler power spectrum of the Pc 5 pulsating radio aurora is presented which indicates that the irregularities causing echo pulsations might be produced by the gradient-drift plasma instability in the disturbed E-region. It is also demonstrated by using the mean doppler velocity of the Pc 5 pulsating radio aurora that during the pulsations the north-south components of electric fields are far larger than the east-west components, being consistent with the Kelvin-Helmholtz instability hypothesis as a cause of Pc 5 geomagnetic pulsations.
- 国立極地研究所の論文
著者
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Sato Natsuo
National Institude of Polar Research
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Ogawa T
Solar-terrestrial Environment Laboratory Nagoya University
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Fujii Ryoichi
National Institute of Polar Research
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Ogawa Tadahiko
Radio Research Laboratory
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Kuratani Yasukazu
Radio Research Laboratory
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Ogawa Toshio
Faculty Of Engineering Toyama Prefectural University
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Ogawa Tadahiko
Faculty Of Engineering Toyama Prefectural University
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Kuratani Yasukazu
Radio Research Laboratories
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Igarashi Kiyoshi
Radio Research Laboratories
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Igarashi K
Communication Research Laboratory Ministry Of Posts And Telecommunications
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Igarashi Kiyoshi
Communication Research Laboratory
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Ogawa Toshio
Solar-terrestrial Environment Laboratory Nagoya University
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Ogawa Tadahiko
Radio Research Laboratories
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