GPS对流层改正模型的最新进展及对比分析

摘要

对流层延迟是目前GNSS导航定位的主要误差源之一.随着导航用户对精度要求的不断提高和对大气研究的不断深入,近年来国内外相继提出了UNB3m、EGNOS和SHAO等多种对流层改正模型.在分析多种对流层模型异同点的基础上,利用3个IGS站的GPS观测数据对多个模型的精度进行了系统的比对分析.%The tropospheric delay is the main error for GNSS navigation and positioning. Along with the accuracy improved and deep research, the UNB3m, EGNOS, SHAO, etc. Tropospheric models were proposed in recent years. Three IGS stations are used to analyzed the accuracy of these models. The results offer some valuable information for COMPASS navigation users.