BDS/GPS观测值质量评估与分析

Quality Evaluation and Analysis of BDS/GPS Observation

针对TEQC只能检核Rinex2.xx版的GPS数据的特点,编制了多模数据质量评估软件QC(Quality Check),实例验证了该软件的有效性,在此基础上分析了BDS/GPS的伪距多路径效应(mp1、mp2)与信噪比(sn1、sn2)。结果表明:BDS/GPS的mp1大于mp2,BDS的多路径效应存在MEO>IGSO>GEO的规律,且IGSO卫星存在明显的漂移;随着高度角的减小,BDS/GPS的sn1、sn2逐渐减小;BDS的IGSO卫星、MEO卫星和GPS卫星的信噪比与多路径存在负相关。

According to the characteristics of TEQC can only check the Rinex2.xx version of the data,this paper developed a software named QC（Quality Check）to evaluate observation quality.The software was validated,based on this analysis on multipath effect of BDS/GPS（MP1,MP2）and signal-to-noise ratio（SN1,SN2）.The results showed that the MP1 of BDS/GPS was bigger than MP2;the multipath effect BDS MEOIGSOIGSO,and that the GEO satellite has obvious drift.With the reduction of the elevation angle,SN1 and SN2 of BDS/GPS gradually reduced,the signal to noise ratio of IGSO,MEO and GPS is negative correlation with multipath.