BDS/INS紧组合三频动对动模糊度解算方法  

Triple-frequency kinematic-to-kinematic ambiguity resolution with BDS/INS tightly-coupled integration

作　　者：赵修斌[1] 朱楚江 庞春雷[1] 张良 高玉洁 ZHAO Xiubin;ZHU Chujiang;PANG Chunlei;ZHANG Liang;GAO Yujie(Information and Navigation College, Air Force Engineering University, Xi′an 710077, China;The PLA Unit 95140, Huizhou 516211, China)

机构地区：[1]空军工程大学信息与导航学院,陕西西安710077 [2]中国人民解放军95140部队,广东惠州516211

出　　处：《国防科技大学学报》2020年第6期127-132,共6页Journal of National University of Defense Technology

基　　金：国家自然科学基金资助项目(61601506)。

摘　　要：针对伪距观测噪声较大导致动对动条件下三频整周模糊度解法(Three Carrier Ambiguity Resolution,TCAR)模糊度解算不可靠的问题,提出了一种BDS/INS紧组合三频动对动整周模糊度解算方法。通过紧组合系统输出的高精度位置坐标,估算出双差几何距离值,并用其分别代替无几何和几何模式下的双差伪距观测值,显著降低了伪距双差观测噪声水平,有效提高了三频整周模糊度解算成功率。仿真实验结果表明,BDS/INS紧组合输出的高精度位置坐标使得伪距观测精度提高了60%以上,在短基线条件下,当伪距观测噪声达到2 m时,无几何模式下的TCAR算法模糊度解算成功率为0.73%,几何模式下的TCAR算法模糊度解算成功率为31.25%,而BDS/INS紧组合的TCAR算法在两种模式下的模糊度解算成功率达到99%以上,并且获得了厘米级的相对定位精度。Aiming at the problem that when pseudorange observation noise was high,and the ambiguity calculation of TCAR(three carrier ambiguity resolution)method was unreliable in the condition of kinematic-to-kinematic,a triple-frequency kinematic-to-kinematic ambiguity resolution with BDS/INS tightly-coupled integration was proposed.Replacing the double-difference pseudorange observations in GF(geometry-free)and GB(geometry-based)patterns with the double-difference geometry distances estimated by the tightly-coupled integration system,the method obviously decreased the noise level of the pseudorange double-difference observations and improved the success rate of triple-frequency ambiguity calculation.Simulation results show that,the high-precision position output of BDS/INS tightly-coupled integration improved the accuracy of pseudorange observations by more than 60%.In short-baseline condition,when the pseudorange observation noise is 2 m,the success rate of triple-frequency integer ambiguity calculation by GF-TCAR is 0.73%while 31.25%by GB-TCAR.However,the integer ambiguity calculation success rate by the new TCAR method is beyond 99%.And this new solution can achieve centimeter-level kinematic-to-kinematic relative positioning.

关 键 词：BDS/INS紧组合 TCAR法 动对动 整周模糊度 短基线 

分 类 号：P228.1[天文地球—大地测量学与测量工程]