Spherical wave propagation effects on sferics and development of a new portable lightning monitoring system

为了估计100公里水平距离内发生的闪电活动，我们研究了一种单站闪电定位技术。此外，我们还开发了一种新的便携式闪电定位监测系统，用于其单站闪电定位技术的应用。利用地震波直接波与反射波的时差信息，成功地提高了定位精度。我们研制了一种具有两个谐振频率的新型宽带搜索线圈磁强计，用于观测100公里范围内的杂散。我们采用模拟专用集成电路（ASIC）前置放大器缩小了便携式雷电定位监测系统的模拟电路。这些结果对于开发一种新的单站观测照明监测系统具有重要的指导意义。

In order to estimate lightning activities occurring within horizontal distance of 100 km, we have studied a single station lighting location technique. Additionally, we have developed a new portable lightning location monitoring system for an application of its single station lightning location technique. We have succeeded in the location accuracy improvement by using the information on time difference between the direct wave of sferics and the refection waves. We have developed a new wideband search coil magnetometer having two resonant frequencies for observation of sferics within 100 km. We have downsized analog circuits of a portable lightning location monitoring system by using an analog ASIC (application specific integrated circuit) preamplifier. These results could be important and useful for development of a new lighting monitor system by a single-station observation technique.