Development of lightning observation methods for current waveforms and discharge progressing manner

摘要

CRIEPI and manufactures have been developing various kinds of lightning observation instruments. Improvement have been continuing until today because of various requirement of lightning protection. The author shows the development of two types of lightning observation systems , i.e. that of lightning current waveforms and that of lightning progressing manners. Also the author shows the system for simultaneous measurements of lightning currents with electric or magnetic fields at distant place .