一种借助虚拟观测降低单站测向误差的方法

摘要

针对短基线测向精度难以提高的问题，提出了一种借助虚拟观测降低单站测向误差的方法。利用一个实测单站的相差定位测量结果，由三角函数关系可得到异地虚拟站点相对于目标的径向距离，由此得到异地虚拟站点与实测单站之间的虚拟程差，在此基础上，分别分析了借助虚拟单、双站的测向方法。误差分析表明，通过选择合适的虚拟基线长度，能有限地提高测向精度。%In view of the difficulties of improving the accuracy of short⁃baseline direction finding direction finding ( DF ) , this paper proposes a method of reducing single⁃station DF error with the help of virtual observation. By using the phase difference location result from a test site,the radial distance from virtual site of different station to the target can be derived by circular function.Thus,the virtual path difference can be obtained between the test site and the virtual site of different place.On this basis,the DF method is ana⁃lyzed respectively based on virtual single and double stations.The error analysis shows that the DF precision can be slightly improved by selecting appropriate length of virtual baseline.