北斗/GPS宽巷混合双差RTK定位方法  

The RTK Positioning Method Based Mixed Double-Difference Wide-Lane Combined BeiDou with GPS

作　　者：刘振波[1] 闫玉峰 LIU Zhenbo;YAN Yufeng(Jilin Railway Technology College,Jilin 132200,China;Changchun University of Science and Technology,Changchun 130022,China)

机构地区：[1]吉林铁道职业技术学院,吉林吉林132200 [2]长春理工大学,吉林长春130022

出　　处：《测绘科学技术学报》2019年第6期565-569,共5页Journal of Geomatics Science and Technology

摘　　要：针对在高遮挡环境下,通过双频混合双差RTK定位方法性能受限的问题进行了研究,提出一种北斗/GPS宽巷混合双差RTK定位方法。选择(1,-1)的宽巷组合系数,考虑宽巷系统延时偏差ISB(Inter-System Bias),完善双频混合双差模型;计算并补偿双频载波相位ISB和宽巷ISB,进而提高混合双差窄巷模糊度固定成功率。试验结果表明,在截止高度角为60°时,该方法模糊度固定率达到了78.54%,相比双频混合双差方法提高8.68%;比传统的双频标准双差方法提高130%,并且仍然能达到cm级的定位精度。In order to solve the problem of limited performance of double frequency mixed multi-difference RTK positioning method under high cut-off angles,the wide-lane mixed multi-difference RTK positioning method was proposed.The wide-lane combination coefficient of(1,-1)was selected,and the wide-lane system delay deviation ISB(Inter-System Bias)must be considered.Then,the wide-lane mixed multi-difference model was completed,the ISB of dual-frequency carrier phase and the ISB of wide-lane were calculated and compensated,and the ambiguity of mixed multi-difference narrow lane had higher fixed success rate.The test results show that when the cut-off angle is 60°,the fixed rate of ambiguity reaches 78.54%by this method,which is 8.68%higher than that of the mixed multi-difference method and 105%higher than that of the traditional multi-difference method,and this method can also reach the positioning accuracy of cm level.

关 键 词：北斗/GPS 实时动态差分定位 宽巷组合 混合双差 高精度定位 

分 类 号：P228[天文地球—大地测量学与测量工程]