云闪定位算法及误差分析

Location algorithm and error analysis of cloud flashes

为了降低云闪对空间飞行器的危害,同时能够更全面地研究雷暴活动,并为地闪的探测预警提供技术支持,开展云闪定位方法的研究具有重要的价值。本文根据现场云闪探测仪采集到的VHF辐射源入射方向信息和达到探测站的时间差信息,结合无线电测向时差定位技术,研究了VHF云闪的四站定位算法及其误差精度分析。在对该算法和误差精度进行matlab仿真的基础上,得到了不同布站方式和基线距离情况下定位误差分布图,为探测站的布站选址提供了理论支撑。

In order to reduce the damage of space craft caused by cloud flashes,while redounding to a more comprehensive study of thunderstorm activity and providing a technical support to the ground lightning detection and warning,it is worth studying a method of cloud flashes detection.According to the information of VHF signal’s direction and time-difference detected by cloud flashes detector,this paper studies a location algorithm and its position accuracy of four detection stations with radio direction finding and time-difference techniques.The position accuracy map under the conditions of different way and distance of arrangement from a simulation of algorithm and error precision are gotten by Matlab,which can provide a support to the station’s arrangement.