GPS/BDS组合定位精度分析

随着定位技术的不断发展及多系统导航定位技术的逐步推广，多系统组合导航定位已经成为了GNSS导航定位领域中的主要发展趋势。主要阐述了GPS/BDS组合相对定位的观测方程和数学模型，并根据实测数据对比分析，从卫星可见性、精度因子、定位精度和均方根误差等方面对GPS、BDS及GPS/BDS组合定位系统的定位性能、定位精度进行了比较。研究结果表明，较单一的GPS和BDS系统定位，采用GPS/BDS组合定位可有效提高卫星可见数目和DOP值，且稳定性更好。GPS/BDS组合定位的定位精度也明显优于单一系统，这对GNSS高精度导航定位具有重要的参考价值。

Accuracy Analysis of GPS/BDS Combined Positioning

In view of the continuous development of positioning technology and the gradual promotion of multi-system navigation and positioning technology, multi-system integrated navigation and positioning has become the main development trend of GNSS navigation and positioning field. In this paper, the observation equation and mathematical model of GPS/BDS combination relative positioning are mainly described. The positioning performance and precision of GPS, BDS and GPS/BDS integrated positioning system are compared from the aspects of satellite visibility, precision factor, positioning accuracy and root mean square error. The results show that the GPS/BDS integrated positioning system can effectively improve the number of visible satellites and DOP values, and the stability is better than the single GPS and BDS positioning system. The positioning accuracy of GPS/BDS integrated positioning is also better than that of the single system, which has important reference value for GNSS high-precision navigation and positioning system.