GPS/BDS/GLONASS/Galileo多系统融合在中国区域的仿真分析

通过STK软件对GPS、BDS、GLONASS、Galileo四个系统的星座结构进行仿真,并选择单系统与多系统组合定位的方式对中国区域内的可见卫星数、GDOP值和定位精度进行覆盖分析。结果表明,GPS/BDS/GLONASS/Galileo四系统组合定位在我国的GDOP值可达0.7~0.8,定位精度可达3~4m,优于其他方式的组合定位;同时四系统组合定位下的GDOP值降低,定位精度更好,GDOP值与定位精度的波动异常得到了抑制,导航定位的性能与稳定性也得到了相应的提升。

Simulation analysis of GPS/BDS/GLONASS/Galileo multi-constellation satellite system in China

In this paper, the constellation structures of GPS, BDS, GLONASS and Galileo are simulated with STK software, then analysis is made on the visible satellite, GDOP value and positioning accuracy in China areas with single-system and multi-system combination positioning method.The result shows that the value of GDOP can reach 0.7~0.8 when the combination of four systems is chosen in our country, and the positioning accuracy can reach 3~4 meters, which is better than other combination systems.Meanwhile, the GDOP value decreases, the positioning accuracy is higher and the abnormal fluctuation of the GDOP value and the positioning accuracy are restrained.In addition, the performance and stability of the navigation and positioning are also improved accordingly.