测绘科学技术学报2025，Vol.41Issue(1)：8-14,7.DOI:10.3969/j.issn.1673-6338.2025.01.002
单频PPP中电离层延迟影响及改正效果分析
Impact and Correction of Ionospheric Delay in Single-frequency Precise Point Positioning
摘要
Abstract
Single-frequency PPP cannot combine multi-frequency observations to eliminate ionospheric delay.In or-der to analyze and correct the single-frequency ionospheric delay,the measured data and the GPS dual-frequency observations with preset ionospheric delay obtained by simulation,are calculated based on the single-frequency un-combined PPP model and dual-frequency uncombined PPP model respectively.The comparative analysis shows that the ionospheric delay has great impact on the positioning performance of single-frequency PPP.The positioning performance of single-frequency PPP without ionospheric influence is comparable to that of dual-frequency PPP.Then three common constraint strategies including constant constraint,spatial-temporal constraint and stepwise-re-laxed constraint are used to perform PPP solving experiments on the measured data.The experimental results show that the additional ionospheric constraints can significantly shorten the convergence time of single-frequency PPP,but there is still a certain gap from the dual-frequency PPP.关键词
非差非组合PPP/单频/电离层约束/定位性能/Bernese软件Key words
undifferenced and uncombined PPP/single frequency/ionosphere constraint/positioning perform-ance/Bernese software分类
测绘与仪器引用本文复制引用
邱瑞瑾,冯哲煜,陈晨,景鑫,李建文..单频PPP中电离层延迟影响及改正效果分析[J].测绘科学技术学报,2025,41(1):8-14,7.基金项目
国家自然科学基金项目(42174036). （42174036）
