Electromagnetic waves are observed for location of lightning discharges, however, electromagnetic waves in the frequency ranges of MF and LF suffer from the propagation effect dependent on geography and ground conductivity. If electromagnetic waveforms are affected by the propagation effect, the peak time and the rise time elongates, resulting in inaccurate estimation in the lightning location by the time-of-arrival (TOA) method. FDTD method is a numerical electromagnetic field calculation code capable of handling complex geography. There are three subjects in this research. The first is changes of electromagnetic field waveforms affected by the above causes. The second is on the determination of arrival time for lightning location. The last is trial of improvement of location accuracy by using a table of propagation delay.
発行年
2007-02-02
日本十進分類法
547
学位名
修士(工学)
学位
master
研究科・専攻
工学系研究科電気工学専攻
学位授与年月日
2007-03
アイテムへのリンクの際はタイトル右肩にある「Permalink」をご利用ください！
Please use "Permalink" at the top right of the title when linking to items!
中長波帯電磁界パルスによる雷放電位置標定精度向上の研究
kawanuma.pdf
(671.65KB)
