基于BDS/GPS的短基线单历元多频RTK定位研究

Research of SingleEpoch and MultiFrequency BDS/GPS RTK Positioning for Short Baseline

随着全球卫星导航系统(GNSS)进入多系统时代,天空中导航卫星的可见数不断增加,而我国北斗卫星导航系统(BDS)也已开始面向用户提供三频导航信号,为整周模糊度的解算提供有利条件,极大改善了GNSS单历元RTK定位的精度和可靠性。本文在基于几何的(TCAR)算法的基础上,将BDS/GPS组合引入到宽巷和窄巷模糊度解算中,提出一种基于双系统组合的单历元多频RTK定位模型,通过实验进行论证分析,结果表明:该模型在模糊度解算效率和定位精度两个指标方面都优于其他两种模型。

With the number of visible satellites in the age of multiple systems for global navigation satellite system （GNSS） increasing and Chinese BeiDou satellite navigation system （BDS） beginning to offer triple frequencies signals to users, ambiguity resolution was benefi- cially effected, and it greatly improved the accuracy and reliability of GNSS-RTK positio- ning. In this paper, based on the geometric TCAR （Three Carrier Ambiguity Resolution） al- gorithm BDS/GPS mode was brought into the calculation of wide lane and narrow lane, then the single epoch and multifrequency BDS/GPS RTK positioning model was present. The mathematical model and its feasibility were verified by experimental data and the results showed that compared with other models, the proposed model were optimal in ambiguity res- olution efficiency and positioning accuracy.