削弱大型水闸BDS监测多路径效应的MHM方法  

The MHM method for weakening the BDS monitoring multipath effect of the large sluice

作　　者：孙澳 张秋昭[1,2] 高兴旺 张云龙 朱守庆 张龙强 SUN Ao;ZHANG Qiuzhao;GAO Xingwang;ZHANG Yunlong;ZHU Shouqing;ZHANG Longqiang(China University of Mining and Technology,Jiangsu Key Laboratory of Resources and Environmental Information Engineering,Xuzhou 221116,China;China Railway Design Group Co.,Ltd.,National Engineering Laboratory for Digital Construction and Evaluation of Urban Rail Transit,Tianjin 300308,China)

机构地区：[1]中国矿业大学江苏省资源环境信息工程重点实验室,江苏徐州221116 [2]中国铁路设计集团有限公司城市轨道交通数字化建设与测评技术国家工程实验室,天津300308

出　　处：《海洋测绘》2024年第1期48-52,共5页Hydrographic Surveying and Charting

基　　金：国家自然科学基金(42074226,U22A20569);城市轨道交通数字化建设与测评技术国家工程实验室开放课题基金(2021ZH03)。

摘　　要：大型水闸变形监测复杂环境中存在的多路径效应限制了全球导航卫星系统(global navigation satellite system,GNSS)精密定位的精度。对此,提出一种顾及北斗导航卫星系统(Beidou navigation satellite system,BDS)不同星座类型多路径效应的半天球图(multipath hemispherical map,MHM)方法。该方法建立以监测站为球心的半天球进行格网点划分,通过格网点内参数化实现多路径误差建模,适用于BDS多星座以及大型水闸复杂的监测环境。采用曹娥江大型水闸监测案例,对多路径改正前后的单差残差及变形监测坐标序列进行分析,XYZ方向精度较多路径误差改正前提升63.06%、54.17%、57.84%,表明采用该方法可以有效削弱多路径效应,提高变形监测精度。The multi-path effect existing in the complex environment of large-scale sluice deformation monitoring limits the accuracy of the Global Navigation Satellite System(GNSS)precision positioning.In this regard,this paper proposes a Multipath Hemispherical Map(MHM)method that takes into account the multipath effects of different constellation types of BeiDou Navigation Satellite System(BDS).This method establishes a half-celestial sphere with a monitoring station as the center for grid point division,and realizes multi-path error modeling through parameterization of grid points.Using the monitoring case of the large-scale sluice in the Cao'e River to analyze the single-difference residuals and deformation monitoring coordinate sequences before and after the multi-path correction,the XYZ direction accuracy is improved more than 63.06%,54.17%,and 57.84%after the path error correction,indicating that this method can effectively weaken the multipath effect and improve the deformation monitoring accuracy.

关 键 词：变形监测 北斗卫星导航系统 多路径效应 格网点建模 半天球 大型水闸 

分 类 号：P228[天文地球—大地测量学与测量工程]