抄録
The horizontal electric field (Er) contains useful information for estimating position of thundercloud. Unfortunately, it is difficult to detect horizontal electric field (Er) due to electric field component on the earth surface is almost a vertical component.
We propose a new idea for horizontal electric field (Er) detection. We developed two types of horizontal electric field meter (HEFM), i. e., a fixed electrode-type and a rotating electrode-type, and evaluated their performance experimentally and found that they have sufficient sensitivity to Er to estimate the direction of thundercloud. In this paper, we present the result of performance evaluation and also present an electric field data measured by HEFMs as examples.
