无线电工程2025，Vol.55Issue(8)：1667-1674,8.DOI:10.3969/j.issn.1003-3106.2025.08.014
GLONASS精密单点定位伪距频间偏差模型化分析
Pseudorange Inter-frequency Bias Modeling Analysis for GLONASS Precise Point Positioning
摘要
Abstract
Russia's GLONASS pseudorange Inter-Frequency Bias(IFB)constitutes a significant error source in GLONASS pseudorange observations.Six parameterization strategies are proposed to address GLONASS pseudorange issues,and the impacts of these strategies on Precise Point Positioning(PPP)performance are analyzed.Verification using real data from 144 global stations demonstrates that neglecting GLONASS pseudorange IFB results in a pseudorange residual Root Mean Square(RMS)of 1.27 m and prolonged PPP convergence time.While down-weighting pseudorange observations reduces the convergence time by 7.1%,it fails to eliminate the systematic IFB biases.Parameterizing GLONASS pseudorange IFB as linear or polynomial functions significantly reduces residuals,with quadratic terms contributing 0.74 m for 51.3%of stations.Satellite-specific and frequency-specific estimation strategies further enhance model validity,reducing pseudorange residual RMS below 1.19 m,with satellite-specific solutions showing optimal convergence efficiency under sufficient satellite availability.The study recommends satellite-specific estimation for high and medium-latitude regions,down-weighting strategies for low-latitude or obstructed environments,and linear models as universal solutions when receiver types are unknown.These findings provide critical processing strategy references for GLONASS-only or multi-system PPP practical applications.关键词
GLONASS/精密单点定位/伪距频间偏差/定位精度/收敛时间Key words
GLONASS/PPP/pseudorange IFB/positioning accuracy/convergence time分类
天文与地球科学引用本文复制引用
苏珂,焦国强,徐莹,杨宇泽,孔一诺,王梓鑫..GLONASS精密单点定位伪距频间偏差模型化分析[J].无线电工程,2025,55(8):1667-1674,8.基金项目
重点实验室基金(SYS-ZX02-2024-01) Key Laboratory Fund(SYS-ZX02-2024-01) （SYS-ZX02-2024-01）
