基于Anubis的北斗观测数据质量分析

为分析BDS在亚太地区及其他范围内的数据质量差异，选取2个国内和3个境外MGEX连续跟踪站10 d的数据，利用Anubis软件对BDS及GPS数据质量进行对比和可视化分析，同时着重分析C37以上不同类型轨道卫星的多路径效应及信噪比。结果表明，BDS各测站的数据完整率均为100%；各频段各类型卫星的伪距多路径平均值均低于52.2 cm, 周跳比除URUM站略高外，其他各站均低于1，伪距单点定位精度与GPS相当；BDS-3三种类型的卫星轨道中，B1I频段的多路径误差最严重、信噪比最低。

Quality Analysis of BDS Observation Data Based on Anubis

In order to analyze the difference of data quality of the Beidou system in the Asia-Pacific region and other areas, we select the data of 10 days from 2 domestic and 3 overseas MGEX continuous tracking stations, then use Anubis software to compare and visualize the data quality of BDS and GPS systems. At the same time, we analyze the multipath effect and signal-to-noise ratio of satellites with different orbit types above C37. The results show that the data integrity rate of each BDS station is 100%. The mean value of pseudo range multipath of each frequency band and each type of satellite is lower than 52.2 cm, and the cycle slip ratio is lower than 1, except for the data of URUM station. The pseudo range single point positioning accuracy is similar to that of GPS, and in the three types of satellite orbit of BDS-3, B1I has the most serious multipath error and the lowest signal-to-noise ratio.