基于参考站误差估计的GNSS区域增强技术

GNSS Regional Augmentation Technique Based on Reference Station Errors Estimation

研究了应用于民航航路、铁路、内河水运等领域的分布式卫星导航区域增强系统的定位方法,分析了参考站误差、单参考站电离层和对流层误差,提出了一种基于参考站误差估计的多站差分GNSS区域增强技术。仿真结果表明,该方法可减小参考站误差对多站差分的影响,解决现有技术中单差分系统用户与地面站的距离增加定位误差增大的问题,并增加了定位精度,同时提高了系统的可靠性和覆盖效率。

A positioning method of distributed GNSS regional augmentation system is studied for civil aviation and railway and river transport. The method is composed of multiple differential reference stations. Based on the analysis of the reference station errors and the ionospheric and tropospheric errors of single reference station, a reference station errors estimation positioning method of multiple differential stations area navigation system is proposed. The simulation results show that this method can reduce the reference station errors for multiple stations difference, resolve the single reference station difference positioning errors increasing with the distance between the reference station and the user station. Thereby, the positioning accuracy is improved, and reliability and overlay efficiency are increased.