基于声光信号的雷电通道三维定位算法研究  

Research of 3D lightning channel based on the flash and thunder signal

作　　者：张传亮[1] 孙学金[1] 卫克晶[1] 李浩然[1] 颜万祥 

机构地区：[1]解放军理工大学气象海洋学院,南京211101

出　　处：《气象水文海洋仪器》2015年第1期6-12,共7页Meteorological,Hydrological and Marine Instruments

摘　　要：提出了一种利用雷电声光信号进行雷电三维通道定位方法。根据雷电现象发生时,流光每发展一步都会有对应的声光信号产生的原理,利用光信号极值之间的时间间隔,对相应的雷声信号进行不定长时间窗的分段,然后利用相关函数法和声光信号到达的时间差求出每段数据对应的声源三维坐标,最终获取雷电的三维通道。该方法克服了以往算法中利用定长时间窗对雷声信号进行分段带来的雷电通道定位误差。实验结果表明该方法具有一定的可行性。A 3D lightning channel location algorithm which makes use of the flash and thunder signal is proposed. According to the principle that each step develops the lightning streamer, the flash and thunder will occur synchronically. The thunder signal is divided into several segments which are in line with the intervals of contiguous flash pulses. It＇s worth nothing that the time of the segments is not isometric. The 3D coordinates of the sound sources in correspondence with the thunder segments are calculated by the cross-correlation analysis and the time interval between the arrival of flash and thunder. Finally, the lightning channel is obtained. The algorithm overcomes the location error of previous algorithm using isometric window of time. The result shows that this algorithm is feasible.

关 键 词：雷电 三维通道 声光信号 

分 类 号：P412.4[天文地球—大气科学及气象学]