人工触发闪电的先导磁定位与电流反演  

Leader magnetic location and current inversion of triggered lightning

作　　者：李少磊 邱实 石立华 李书磊 LI Shaolei;QIU Shi;SHI Lihua;LI Shulei(National Key Laboratory on Electromagnetic Environmental Effects and Electro-optical Engineering,Army Engineering University ofPLA,Nanjing 210007,China)

机构地区：[1]陆军工程大学电磁环境效应与光电工程国家级重点实验室,南京210007

出　　处：《电波科学学报》2021年第2期264-269,共6页Chinese Journal of Radio Science

基　　金：国家自然科学基金(41675002,51977219)。

摘　　要：为进一步分析人工触发闪电直窜先导的放电过程及其电流特征,建立了闪电通道双站交叉磁定位的方法.该方法利用低灵敏度磁场回击时刻及高灵敏度磁场直窜先导过程的磁定向(magnetic direction finding,MDF)结果,采用双站交叉对直窜先导的放电通道进行定位.人工触发闪电试验观测数据表明,定向结果误差范围在2%以内,双站磁定位的平均定位误差为89.06 m,验证了该方法的有效性.此外,基于磁场波形建立了先导电流重构模型,并通过逐级计算优化参数拟合,实测磁场波形与模拟磁场波形的相关度较高.In order to further analyze the discharge process and current characteristics of the triggered lightning direct leader,we establishes a method for dual station cross magnetic position of lightning channel.The method adopts the magnetic orientation of the low-sensitivity magnetic field return and the magnetic orientation of the high-sensitivity magnetic direction finding(MDF)process,and uses the two-station cross to locate the direct-lead discharge channel.The triggered lightning test observation data shows that the error of the orientation result is within 2%,and the average positioning error of the dual station magnetic positioning is 89.06 meters,which verifies the effectiveness of the proposed method.In addition,based on the magnetic field waveform,the leader current reconstruction model is established,and step by step calculation is used to optimize the parameter fitting.The correlation between the measured magnetic field waveform and the simulated magnetic field waveform is appropriate.

关 键 词：先导 回击 磁定向(MDF) 双站定位 电流重构 

分 类 号：P427.321[天文地球—大气科学及气象学]