摘要
针对电离层延迟误差是单频用户精密单点定位(Precise Point Positioning,PPP)时主要误差源之一的问题,采用中国区域全球定位系统(Global Positioning System,GPS)单频数据进行静态、动态PPP试验。对比分析了Klobuchar模型、无改正方法和参数估计法得到的PPP解算结果。实验结果表明,不同的电离层延迟改正方法对单频PPP定位性能的影响有所不同,水平方向定位精度差异较小,高程方向定位精度有着显著差异。静态模式:参数估计法的平均收敛时间最短,大约为22 min;参数估计法定位精度最优,水平方向定位精度优于22 cm,高程方向优于48 cm。动态模式:Klobuchar模型平均收敛时间最短,收敛时间为28 min;定位精度Klobuchar模型最优,可以为单频PPP提供39 cm以内的水平精度和68 cm以内的高程精度。
Aiming at the problem that ionospheric delay error is one of the most significant error sources for single-frequency user precise point positioning(PPP),this paper used the single-frequency observations of Global Positioning System(GPS)in China for static and kinematic PPP.The PPP solution results obtained by Klobuchar model,no-correction method and parameter estimation method are compared.Experimental result showed that different ionospheric delay correction methods have different effects on single-frequency PPP accuracy.In the static mode,the average convergence time is the shortest of the parameter estimation method,which is about 22 min,and the precision of the parameter estimation is the best,which is better than 22 cm in horizontal direction and 48 cm in vertical direction.In the kinematic mode,Klobuchar model has the shortest average convergence time,and can converge in 28 min.Klobuchar model has the best positioning precision,which can provide the horizontal precision within 39 cm and the vertical precision within 68 cm for single frequency PPP.
作者
艾力·库尔班
KUERBAN Aili(School of Mechanical and Electrical Engineering,Xinjiang Institute of Technology,Akesu 843100,China)
出处
《四川建材》
2025年第6期60-65,共6页
Sichuan Building Materials
关键词
单频精密单点定位
电离层延迟改正
KLOBUCHAR模型
参数估计法
定位精度
single-frequency precise point positioning
ionospheric delay correction
Klobuchar model
parameter estimation method
positioning accuracy
