精密单点定位中对流层延迟改正模型分析

摘要

在精密单点定位中,通过有效的方法减小对流层误差源对定位精度的影响。其中Saastamoinen模型和Niell模型对减小对流层延迟误差效果较好。重点介绍了这两种模型,并通过实验分析了两种模型在精密单点定位中对对流层延迟误差的改正效果。实验结果以标准偏差和均方根的形式给出,说明了Saastamoinen模型与Niell模型对定位结果都有所改善,但Niell模型结果较好。%In Precise Point Positioning,the key problem is to reduce the influence of errors for positioning accuracy through the effectual methods.Saastamoinen and Niell are nice to reduce the tropospheric delay.The paper mainly focuses on the introduction of this two kinds of models,and analyses their correction effect of tropospheric delay in PPP through the positioning results.Positioning results are given in the form of the STD and RMS,it shows that Saastamoinen and Niell both can improve the positioning results,but the effect of Niell is much better.