Beidou/GPS/GLONASS多系统卫星定位数据质量比较分析

Quality comparison and analysis of Beidou/GPS/GLONASS multi system satellite positioning data

本文在运用TEQC软件结合QCVIEW32和DOSBox 0.74两款软件对GPS/GLONASS定位数据分析的基础上,引入朱静然等人设计的多系统GNSS数据质量分析软件对Beidou/GPS/GLONASS定位数据进行质量分析,并对北斗卫星(Beidou)、双星(GPS/GLONASS)和多星(Beidou/GPS/GLONASS)定位数据的多路径效应、电离层延迟、数据利用率与信噪比、卫星可见数和精度因子PDOP值等几个方面进行比较分析.试验分析表明:双星系统下的L1、L2两大频率兼容性良好;双星系统下的双频数据质量和稳定性良好,接收机周跳修复能力较强;多星融合的多路径误差明显小于北斗单系统,平均mp1和mp2分别减小了18%和6%,多星融合增加的卫星在一定程度上可以相互补偿从而削弱多路径效应对定位结果的影响;在观测条件复杂,截止高度角较高的情况下,单一系统无法满足高精度定位需求,而组合系统可以保持较低并且变化平缓的PDOP值,提供了高精度的定位服务.

This paper is based on the analysis of GPS/GLONASS positioning data by using TEQC software, also combined with QCVIEW32 and DOSBox 0. 74 two software, the multi-system GNSS data quality analysis software designed by Zhu Jingran et al. was introduced to analyze the quality of Beidou/GPS/GLONASS positioning data. We also compare the positioning effect of the Beidou satellite（ Beidou）,binary（ GPS/GLONASS） and satellites（ Beidou/GPS/GLONASS） positioning data,such as multipath effect,ionospheric delay,data utilization and signal to noise ratio,satellite visibility and accuracy factor PDOP value. The experimental analysis shows that under the binary star system the two large frequencies of L1 and L2 are in good compatibility; the dual frequency data quality and stability in the binary system are good,and receiver cycle repair ability is stronger; the multipath error of multistar fusion is significantly less than that of Beidou single system,with the average mp1 and mp2 are reduced by 18% and 6% respectively. The increase of multi-satellite fusion can compensate each other to a certain extent and weaken the influence of multi-path effect on the positioning results. Under the condition of complex observation conditions and high cut-off angle,the single system can＇t meet the requirement of high precision positioning,while the combined system can maintain the PDOP value of low and gentle change,providing high precision positioning services.