基于测向测时差云闪定位精度分析及布局优化

针对多站雷电定位系统中的云闪定位问题,建立4站云闪辐射源定位模型。根据探测站探测的云闪电磁波到达的时间和角度信息,结合无源定位理论中的测向测时差定位法,给出云闪定位计算方法和精度评定。利用Maltab,仿真探测站不同布站方式下的云闪定位误差分布情况。通过对比研究,得出最优布站形式,并对最优布站形式的精度影响因素进行分析。结果表明,布站形式、基线长度、探测站高度等因素均可对云闪定位精度产生影响。

Location Accuracy Analysis and Layout Optimization for Intracloud Lightning based on AOA Jointed TDOA

As to positioning of intracloud lightning in the lightning location system,a four-detection-station location model for intracloud lightning was built.According to the arrival-time information and the direction information of the intracloud lightning which measured by detecting stations,combining the AOA jointed TDOA of passive location theory,the calculation method and accuracy assessment of intracloud lightning location were presented.The intracloud lightning location error map under the conditions of different station distribution was gotten by Matlab.Through the comparative study,the optimal？ station distribution？ form can be concluded,and the location accuracy factors of the optima one is analyzed.The results show that the distribution form,baseline length and height of stations can influence the positioning accuracy of intracloud lightning.