交叉台链无线电导航定位中几何精度因子算法

摘要

Loran-C system commonly uses single chain hyperbola positioning algorithm. China stations distribution causes positioning accuracy declining. In order to improve the positioning accuracy, the cross-stations hyperbolic positioning GDOP algorithm was deduced. And GDOP regional distribution of the South China Sea area (16°N, 107°E) to (25°N, 118°E) was simulated by MATLAB software. The comparison between the GDOP values of single chain Hyperbola and cross-stations algorithm was carried on. The result indicated that poisoning with cross-stations algorithm in the cross-region of two sets of stations was able to improve the accuracy.%罗兰C系统常用单台链双曲线算法进行定位.我国台站的分布导致定位精度下降,为了改善台站分布对精度的影响,对罗兰C交叉台链双曲线的几何精度因子(GDOP)算法进行了推导.并运用MATIAB工具仿真了南海(16°N,107°E)到(25°N,118°E)区域的几何定位因子分布.对单台链和交叉台链算法的几何精度因子进行了对比,结果表明在两个台对的交叉区域利用交叉台链算法进行定位,能够提高定位精度.