全球定位系统2025，Vol.50Issue(1)：18-24,7.DOI:10.12265/j.gnss.2024164
不同对流层映射函数对多模GNSS实时PPP-AR性能影响
The effects of different tropospheric mapping functions for multi-GNSS real-time precise point positioning with ambiguity resolution performance
摘要
Abstract
The effects of tropospheric mapping functions on the precise point positioning with ambiguity resolution(PPP-AR)should not be neglected.Real-time data for Wuhan University's precise orbits,satellite clock biases,earth rotation parameters,and observable-specific signal bias(OSB)products were received through the international GNSS service(IGS)NTRIP client mount point OSBC00WHU1.The data were combined with observations from 11 multi-GNSS experiment(MGEX)stations distributed in Australia.The study investigated the effects of four tropospheric mapping functions,including Niell mapping function(NMF),global mapping function(GMF),Vienna mapping function 1(VMF1),and Vienna mapping function 3(VMF3)for real-time PPP-AR performance of the BeiDou navigation satellite system(BDS),BDS/GPS,and BDS/GPS/Galileo.The experimental results showed that the four tropospheric mapping functions had minimal effects for real-time PPP-AR performance of BDS,BDS/GPS,and BDS/GPS/Galileo.The use of GMF and VMF3 provided comparable real-time PPP-AR performance,outperforming NMF and VMF1.The average positioning accuracy of BDS real-time PPP-AR in the dynamic and static modes is generally comparable in the east and north directions,both around 1.0 cm.However,there is a significant difference in the average positioning accuracy in the up direction,approximately 3.5 cm and 2.6 cm,respectively.The average positioning accuracy of BDS/GPS/Galileo real-time PPP-AR shows a significant improvement more than BDS,while the improvement more than BDS/GPS is relatively small.关键词
对流层映射函数/GNSS/精密单点定位(PPP)/模糊度固定(AR)Key words
tropospheric mapping function/GNSS/precise point positioning(PPP)/ambiguity resolution(AR)分类
测绘与仪器引用本文复制引用
余治河,方卓,彭源芳..不同对流层映射函数对多模GNSS实时PPP-AR性能影响[J].全球定位系统,2025,50(1):18-24,7.基金项目
国家自然科学基金(42271106,42471301) （42271106,42471301）
