接收机自主完好性监测可用性判断方法研究

Research on RAIM Availability Algorithm

简介目前卫星导航中的接收机自主完好性监测RAIM算法和其中常用的三种可用性判断方法:δHm ax方法、ARP(Approxim ated R ad ia l-E rror Protected)方法和HPL(Horizonta l Protection Leve l)方法。对这三种可用性判断方法进行了理论分析和比较,证明δHm ax方法和HPL方法的理论等价性。通过计算机仿真对δHm ax方法和HPL方法的等价性进行了验证。并给出三种可用性判断方法在我国部分地区的RA IM算法的可用率。

δH_(max),Approximated Radial Protect(ARP)and Horizontal Protect Level(HPL) are the three usual ways to judge RAIM availability.The paper analyzes and compares the three methods,proves the equivalence of δH_(max) and HPL.Simulation result on computer proves this view point.Finally,the paper provides GPS RAIM availabilities in the cities of China.