顾及频间钟偏差改正的精密单点定位模糊度固定

Precise Point Positioning Ambiguity Resolution with Inter-Frequency Clock Bias Correction

摘要:

针对频间钟偏差（IFCB）影响三频非差非组合精密单点定位模糊度固定（PPP-AR）性能的问题，提出了一种历元差分（ED）的方法估计全球定位系统（GPS）、伽利略卫星导航系统（Galileo）和北斗卫星导航系统（BDS）的IFCB；分析了GPS、Galileo和BDS卫星面向相位的（PIFCB）时变特性，评估了IFCB改正对GPS Block IIF卫星超宽巷（EWL）未校准相位延迟（UPD）和GPS三频非差非组合PPP-AR性能的影响。结果表明：GPS、Galileo和BDS卫星的PIFCB时变序列峰值分别约为10 cm、3cm和5 cm。IFCB改正可以显著提高GPS Block IIF卫星超宽巷UPD的稳定性和三频非差非组合PPP-AR性能。

Abstract:

This paper addresses the issue that inter-frequency clock bias （IFCB） affects the performance of triple-frequency undifferenced and uncombined precise point positioning ambiguity resolution （PPP-AR）. It proposes an epoch-differenced （ED） method to estimate IFCB for Global Positioning System （GPS）， Galileo Navigation Satellite System （Galileo）， and BeiDou Navigation Satellite System （BDS） satellites. It analyzes the time-varying characteristics of phase-specific IFCB （PIFCB） for these three satellite systems and evaluated the impacts of IFCB correction on extra-wide lane （EWL） uncalibrated phase delay （UPD） estimation for GPS Block IIF satellites and the performance of triple-frequency undifferenced and uncombined PPP-AR. The results demonstrate that the peak values of time-varying PIFCB series for GPS， Galileo， and BDS satellites are approximately 10 cm， 3 cm， and 5 cm， respectively. IFCB correction significantly improves the stability of EWL UPD estimation for GPS Block IIF satellites and enhances the performance of triple-frequency undifferenced and uncombined PPP-AR.