观测值域恒星日滤波方法在高铁路基变形监测中的应用  

Application of sidereal filtering in observation domain in deformation monitoring of high speed railway subgrade

作　　者：刘太宗 何秀凤[1] 贾东振[1] 詹伟 LIU Taizong;HE Xiufeng;JIA Dongzhen;ZHAN Wei(School of Earth Sciences and Engineering,Hohai University,Nanjing 211100,China)

机构地区：[1]河海大学地球科学与工程学院,南京211100

出　　处：《导航定位学报》2023年第1期39-47,共9页Journal of Navigation and Positioning

摘　　要：针对高铁环境下对多路径误差削弱方法分析不足的问题,提出一种高铁路基变形监测方法:利用哈佳铁路路基实测北斗卫星导航系统(BDS)观测数据,采用双差、单差和非差观测值域恒星日滤波方法,提取变形监测中多路径相关的周期性误差,以消除多路径误差对变形监测结果的影响。实验结果表明:3种方法在东方向上的定位精度分别提高了26.90%、36.82%和27.41%,北方向提高了37.31%、46.10%和37.50%,高程方向提高了40.41%、42.52%和40.20%;单差方法对多路径效应改正的效果最好,更适用于高铁路基变形监测中多路径效应的削弱。Aiming at the problem of insufficient analysis on multipath error reduction methods under high-speed rail environments,the paper proposed a deformation monitoring method of high-speed railway subgrade:the BeiDou navigation satellite system(BDS)observation data of Ha-jia railway subgrade were used to extract the multipath dependent periodic errors in deformation monitoring by the methods of double-difference,single-difference and non-difference sidereal filtering in observation domain,in order to mitigate the influence of multipath errors on deformation monitoring results.Experimental result showed that:the positioning accuracy of the three methods would increase by 26.90%,36.82%and 27.41%in the E direction,37.31%,46.10%and 37.50%in the N direction,and 40.41%,42.52%and 40.20%in the U direction,respectively;among which the single-difference method could be more suitable for mitigating multipath effect in high-speed railway subgrade deformation monitoring.

关 键 词：北斗卫星导航系统 变形监测 多路径误差 观测值域 恒星日滤波 

分 类 号：P228[天文地球—大地测量学与测量工程]