An Electronic Lightning Flash Counter

摘要

A modern electronic lightning flash counter is described here. Basic design princiles leading to the construction of this lightning flash counter are briefly discussed. A prototype instrument instrement was constructed and tested in actual thunderstrom environments. This lightning flash counter measures the cloud-to-ground flashes of 100 millisecond duration and disregards lightning flashes (strokes) of less than 100 millisecond duration. This instrument ahs an input filter of 2 kHz bandwidth. The input filter is decoupled from the antenna and the antenna-to-ground capacitance does not affect the input filter circuit. It improves over the requirement of large antennae for GIGRE type counters.