北斗导航系统的整周模糊度解算及周跳探测

摘要

影响北斗卫星导航系统(BDS,BeiDou navigation satellite system)观测数据质量的重要指标包括整周模糊度的确定、周跳探测与修正.首先,从码伪距观测方程和载波相位观测方程出发,研究BDS整周模糊度解算方法.其次,利用电离层残差量作为探测周跳的手段,通过仿真实验分析该方法的可行性.实验表明:当周跳小于8周时,用电离层残差探测周跳比较适合;若周跳大于8周,需选用其它方法.%Confirmation of integer ambiguity and the detection and correction of cycle slip are important quality indices of BDS observed data.Firstly,based on the code pseudorange observation equation and carrier phase observation equation,BDS integer ambiguity resolution method is studied.Secondly,the ionospheric residual method is used to detect cycle slips,and its feasibility for BDS is analyzed by simulation.Results show that it is more suitable to detect cycle slips with ionospheric residuals when the cycle slip is less than 8 weeks;if the cycle is longer than 8 weeks,other methods should be used to detect cycel slip.