LEMP from Lightning Discharges Observed by JLDN
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概要
- 論文の詳細を見る
JLDN (Japanese Lightning Detection Network) is a large-scale lightning location system, which covers from Hokkaido to Southwest Islands of Japan. It observes LEMP (lightning electromagnetic impulse) in the frequency ranges from VLF to LF, and estimates location and current amplitudes of lighting return strokes. The present study evaluates its ability to discriminate LEMP from return-strokes by comparing its output with the observation of a fast-antenna network constructed on Fukui Plain. It turns out that about 90% of the sources of LEMP, interpreted by JLDN as positive return strokes in the 10kA range in summer, are not cloud-to-ground strokes but in-cloud discharges. The number of termination points on ground produced by negative cloud-to-ground strokes in summer is about 1.3 to 1.4 times of the number of negative flashes observed by JLDN.
- 社団法人 電気学会の論文
- 2005-08-01
著者
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ITAMOTO Naoki
Hokuriku Electric Power Co., Inc.
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Ishii Masaru
The Univ. Of Tokyo
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Itamoto Naoki
Hokuriku Electric Power Co.
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Fujii Fumiyuki
The University Of Tokyo
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Fujii Fumiyuki
University Of Tokyo
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SHINJO Kazuo
Hokuriku Electric Power Company
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SAITO Mikihisa
The University of Tokyo
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MATSUI Michihiro
Franklin Japan Corporation
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HOJO Jun-Ichi
Lightning Research Office
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Saito Mikihisa
The Univ. Of Tokyo
関連論文
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- Numerical Simulation of Propagation Effect on Lightning Field Waveforms
- Evaluation of Characteristics of Lightning Faults on 275kV Transmission Lines
- Spatial distribution of high current lightning discharges in Hokuriku area in winter (特集 IWHV 2007 (5th International Workshop on High Voltage Engineering))
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