低成本接收机单频周跳探测与修复方法  

Single-frequency cycle-slip detection and repair method for low-cost receivers

作　　者：祝会忠[1] 叶丞龙 刘程毅 李军[1] ZHU Huizhong;YE Chengong;LIU Chengyi;LI Jun(School of Geomatics,Liaoning Technical University,Fuxin,Liaoning 123000,China;GNSS Research Center,Wuhan University,Wuhan 430079,China)

机构地区：[1]辽宁工程技术大学测绘与地理科学学院,辽宁阜新123000 [2]武汉大学卫星导航定位技术研究中心,武汉430079

出　　处：《导航定位学报》2025年第2期77-86,共10页Journal of Navigation and Positioning

摘　　要：为了进一步提高低成本全球卫星导航系统(GNSS)接收机高精度定位中周跳探测的准确度,提出一种适用于低成本接收机的载波相位历元差分(TDCP)周跳探测与修复方法:基于载波的前后历元观测值进行历元间和站间的差分组成双差载波相位方程;然后采用最小二乘迭代的方法计算出可靠的坐标改正数并对迭代过程中剔除的卫星观测值进行周跳标记;最后将计算出的坐标改正数带入设计的双差检测方程中,通过分析每个双差检测方程的差值进行周跳卫星的复检和修复。实验结果表明,提出的周跳探测方法可准确判断周跳发生的历元,且在正常卫星数大于4的情况下,当发生周跳的卫星数小于可视卫星数的40%左右时,周跳探测成功率在95%以上;当发生周跳的卫星数大于可视卫星数时,周跳探测的成功率会有所下降。In order to further improve the accuracy of cycle slip detection in high-precision positioning of low-cost global navigation satellite system(GNSS)receivers,the paper proposed a time-difference carrier phase(TDCP)cycle slip detection and repair method suitable for low-cost receivers:a double-difference carrier phase equation was formed based on the observed values of carrier phase before and after epochs,both inter-epoch and inter-station differentials;then,the reliable coordinate corrections were calculated by using the least squares iteration method and the cycle slips in satellite observations excluded during the iteration process were marked;finally,the calculated coordinate corrections were substituted into the designed double-difference detection equation,and by analyzing the differences of each double-difference detection equation,satellite rechecks and repairs for cycle slips were conducted.Experimental results showed that the proposed method could accurately identify the epochs where cycle slips occur,moreover,when the number of satellites affected by cycle slips is less than around 40%of the visible satellites,and the number of normal satellites is greater than 4,the success rate of cycle slip detection would be above 95%;while the success rate of cycle slip detection would decrease when the number of satellites affected by cycle slips exceeds the visible satellites.

关 键 词：单频 低成本 载波相位历元差分(TDCP) 周跳探测 差分定位 

分 类 号：P228[天文地球—大地测量学与测量工程]