多系统GNSS在弱信号环境下的比较研究与精度评估

Comparative Study and Accuracy Evaluation of Multi-GNSS in Weak Signal Environment

针对GNSS接收机在弱信号环境下进行测量作业时,存在解算状态不稳定,定位精度难以控制等一系列问题,文章使用南方银河1接收机和南方灵锐S82接收机进行了实验。通过实测数据对可见卫星数和PDOP值进行了对比分析,来验证多系统GNSS在定位精度方面相对于单一系统具有改善效果。实验结果表明:组合系统能够明显改善卫星空间构型,在观测环境复杂的情况下仍可以提供可靠的高精度定位服务,大大增加系统的可用性,明显提高定位精度。

A series of problems occurred when working in the weak signal environment, such as the unstable state of calculationand the difficulty of precision controlling, According to such issues, the thesis does some research by using the Southern Galaxy 1 and the Southern Spirit S82 receiver.By analyzing and comparing the number of visible satellites and PDOP values, the influence of GNSS integrated navigation system and the single system on the reliability and accuracy of the positioning service is obtained. The experimental results show that the combined system can obviously improve the satellite space configuration, in the case of observation environment complex can still provide reliable and high precision positioning service, greatly increases the availability of the system, significantly improve the positioning accuracy.