GNSS静态相对定位控制网同步环闭合差及重复基线较差限差研究  

Study on Closing Error of Synchronization Loop and Difference Tolerance of Repeated Baselines in GNSS Static Relative Positioning Control Network

作　　者：张晓勇 刘成龙 杨雪峰 ZHANG Xiaoyong;LIU Chenglong;YANG Xuefeng(Faculty of Geosciences and Environmental Engineering,Southwest Jiaotong University,Chengdu 611756,China)

机构地区：[1]西南交通大学地球科学与环境工程学院,四川成都611756

出　　处：《测绘与空间地理信息》2024年第1期54-56,61,共4页Geomatics & Spatial Information Technology

基　　金：中铁第一勘察设计院集团有限公司2019年度科研项目(院科川藏19-31)资助。

摘　　要：目前实际工程中,同步环坐标分量闭合差很难满足全球定位系统测量规范中的限差要求,而高速铁路工程测量规范中的同步环坐标分量闭合差限差又偏大,同时这两部规范所规定的同步环全长闭合差和重复基线长度较差限差也偏大。针对这一现象,本文基于基线解算完成后基线解算软件提供的方差协方差阵,推导了同步环坐标分量及全长闭合差限差和重复基线长度较差限差,并通过高速铁路某工程项目的CPII控制网的实测数据验证了上述限差的合理性。In view of the fact that the closing error of the coordinate component of the synchronization loop is difficult to meet the error limitation in the global positioning system measurement specification in the actual project,and the closing error limitation of the coordinate component of the synchronization loop in the high-speed railway engineering measurement specification is too large.At the same time,the limitation of the total length closure error of the synchronization loop and the length difference of the repeated baseline specified in the two specifications are also too large.In view of this phenomenon,based on the variance covariance matrix provided by the baseline solution software after the baseline solution is completed,this paper deduces the synchronization loop coordinate component,the full-length closure difference limitation and the repeated baseline length difference limitation,and verifies the rationality of the limitation through the measured data of CPII control network of a high-speed railway project.

关 键 词：GNSS控制网 同步环闭合差 限差 重复基线长度较差 

分 类 号：P228.4[天文地球—大地测量学与测量工程]