基于球体模型的短波固定多站测向交叉定位选站方法

Method of Station-Selecting of Direction-Finding Cross Location Based on Sphere Model

为解决测向交叉定位的选站定位问题,基于球体模型,提出以误差椭圆在站心坐标系上的投影为定位精度的度量方法,在此基础上,针对站数约束和精度需求两种选站要求,将投影椭圆的长半轴作为优化目标函数,使用分支定界法得到选站结果。仿真结果表明,该度量方法能准确度量定位精度并反映估计位置的分布情况,该选站方法能得到符合要求的选站方案。

In order to solve the problem of station-selecting of direction-finding cross location,a method using projection of error ellipse on the coordinate system of station center to measure positioning accuracy is proposed based on the sphere model.On this basis,result of station-selecting is given based on branch and bound Method,according to station number constraint and precision lower limit constraint.The simulation results show that projection of error ellipse on the coordinate system of station center can accurately measure the location accuracy and estimate the location distribution,and the methods of selection station can give different results of station-selecting based on different requirements.