摘要
针对单系统长距离实时差分(RTK)定位性能较差的问题,该文利用北斗三号(BDS-3)系统与BDS-2、全球定位系统(GPS)具有重叠频率的特性,分别对各个系统以及具有重叠频率系统组合的定位性能进行了研究。首先,通过误差改正模型对电离层、对流层延迟误差进行模型改正;然后,对大气延迟误差采用历元间随机游走约束来加快模糊度的收敛速度,使用最小二乘模糊度降相关平差法进行模糊度固定;最后,将固定后的模糊度反代回观测方程中进行位置参数的解算。该文选用长距离连续运行参考站(CORS)网的实测数据进行实验,结果表明,单系统中BDS-3的定位性能最优,采用长距离非差RTK算法能够实现流动站厘米级定位且适用性强。
Aiming at the poor positioning performance of single system long-distance real time kinematic(RTK),made use of the overlapping frequency characteristics of BDS-3 system with BDS-2 and global positioning system(GPS),the positioning performance of each system and the combination of systems with overlapping frequencies was studied.First,model correction of ionospheric and tropospheric delayed through error correction model.Then,the atmospheric delay error was constrained by random walk between epochs to accelerate the convergence speed of the ambiguity,using the leastsquare ambiguity decorrelation adjustment to fix the ambiguity.Finally,the fixed ambiguity was reversed to the observation equation to solve the position parameters.Selected the measured data of long-distance CORS network for experiment,the experimental results showed that:BDS-3 had the best positioning performance in a single system,the centimeter level positioning of mobile station could be realized by using long-distance undifference RTK algorithm,and the applicability was strong.
作者
祝会忠
张杰
李军
路阳阳
ZHU Huizhong;ZHANG Jie;LI Jun;LU Yangyang(School of Geomatics,Liaoning Technical University,Fuxin,Liaoning 123000,China)
出处
《测绘科学》
CSCD
北大核心
2023年第4期10-21,53,共13页
Science of Surveying and Mapping
基金
国家自然科学基金项目(42030109)
卫星导航系统与装备技术国家重点实验室开放基金项目(CEPNT-2018KF-13)
“兴辽英才计划”项目(XLYC2002101,XLYC2008034,XLYC2002098)。
