뇌방전에 의해 발생된 전장 및 자장의 특성

초록

This paper describes the features of electric and magnetic fields produced by lightning discharges. The measuring system consists of fast electric field sensor, crossed-loop magnetic field sensors, signal processing circuit, A/D converter and data acquisition equipment with a 12bit resolution and 10 [MS/s] Ϲsampling rate. The frequency bandwidth and responsitivity of the electric field measuring system were 40 [Hz] ~ 2.6 [MHz] and 2.08 [V/m/mV] and those of the magnetic field measuring system were 400 [Hz] ~ 1 [MHz] and 2.78 [nT/mV], respectively. The electric and magnetic fields produced by lightning discharges were observed, and the features and parameters of the waveforms were analyzed.