高速铁路北斗三号基准站信号质量与性能分析
Signal Quality and Performance Analysis of Beidou-3 Benchmark Station on High-Speed Railway

为评价当前铁路复杂环境下建立的连续运行基准站网的BDS-3信号可靠性，使用G-Nut/Anubis对BDS-3的B1I/B3I和B1C/B2a信号进行观测数据质量分析，并基于无电离层组合PPP观测模型，分别采用CODE、ESA和GFZ的精密轨道和钟差产品进行B1I/B3I、B1C/B2a两种BDS-3双频组合静态PPP解算。与GPS对比结果表明，BDS-3采用COD产品和B1I/B3I组合模型可以达到最优的定位性能，结果精度与GPS相当。因此，在铁路连续运行基准站网测量应用中可以使用单BDS系统。
To evaluate the reliability of BDS-3 signals in the continuously operating reference station network established in the complex railway environment, the observation data quality of BDS-3's B1I/B3I and B1C/B2a signals was analyzed using G-Nut/Anubis. Based on the ionosphere-free combined PPP observation model, precise orbit and clock offset products from CODE, ESA, and GFZ were used to perform static PPP solutions for two BDS-3 dual-frequency combinations: B1I/B3I and B1C/B2a. The comparison with GPS results showed that BDS-3 achieves optimal positioning performance when using CODE products and the B1I/B3I combination model, with accuracy comparable to GPS. Therefore, the single BDS system can be used in the measurement applications of the continuously operating reference station network on railways.