COMPASS伪距单点定位精度分析

摘要

The relations between the accuracy of COMPASS pseudorange observations and elevation angles of satellite are studied, and the pseudorange point positioning accuracy of the constellation which contains 4 Geosta tionary Orbit(GEO) satellites and 5 Inclined Geo-synchronization Orbit (IGSO) satellites is analyzed. The results demonstrate multi-path effects of COMPASS pseudorange and observation noise are about 0 - 3 m, and their accura cies are about 0. 3 -0. 7 m. At the higher elevation angles, multi-path effects and observation noise are the smal ler, and both of the multi-path effects and observation noise on all GEO satellites are smaller than those on IGSO satellites. The COMPASS pseudorange point positioning accuracy ( RMS) in the N, E and U directions are about 3. 33 , 3. 45 and 8. 84 m, respectively.%通过实测COMPASS数据处理,分析COMPASS伪距观测值精度与卫星高度角的关系,以及当前4GEO+5IGSO导航星座COMPASS伪距单点定位的精度.结果表明,COMPASS伪距多路径效应和观测噪声在0～3m之间变化,其精度为0.3 ～0.7 m；卫星高度角越大,多路径效应和观测噪声越小；GEO卫星受到的多路径效应和观测噪声要明显小于IGSO卫星；COMPASS伪距单点定位精度(RMS)在N、E、U方向上分别为3.33、3.45、8.84m.