对流层延迟对GNSS精密单点定位精度的影响

The influence on accuracy of GPS precise point positioning caused by troposphere delay

从参数估计和模型改正两个方面来研究对流层对GNSS精密单点定位精度的影响。在参数估计方面,使用了Niell和Marini映射模型,分析了这两个映射模型对对流层延迟的影响;在模型改正方面,讨论了Sasstamonien模型和Sasstamonien模型分别与Niell、Marini映射模型的组合方式,比较了三种对流层延迟处理方法解算坐标的精度及收敛性,得出了在精密单点定位解算中减小对流层延迟误差的一种较好方案。

Parameter estimation and model correcting are used to study the influence of troposphere delay on GNSS precise point positioning. In terms of parameter estimation,we use the mapping model of Niell and Marini to analyze the influence of troposphere delay. In terms of model correcting,we discuss the Sasstamonien model and the combinations of Sasstamonien model separately with Niell and Marini model. While we compare the precision and convergence of calculating coordinates of three methods,and obtain a better solution to reduce tropospheric delay error in precise point positioning.