顾及起算点误差的区域参考框架约束方法研究  

Research on Constraint Method of Regional Reference Frame Considering Errors of Starting Points

作　　者：王盼龙 侯汶材 蒋光伟 王斌 程传录 李康 WANG Panlong;HOU Wencai;JIANG Guangwei;WANG Bin;CHENG Chuanlu;LI Kang(Geodetic Data Processing Center,MNR,334 East-Youyi Road,Xi’an 710054,China;Northwest Branch of CSCEC Xinjiang Construction and Engineering Group Co Ltd,2528 West-Keji Road,Xi’an 710086,China)

机构地区：[1]自然资源部大地测量数据处理中心,西安市710054 [2]中建新疆建工(集团)有限公司西北分公司,西安市710086

出　　处：《大地测量与地球动力学》2024年第1期39-45,共7页Journal of Geodesy and Geodynamics

基　　金：自然资源部高层次科技创新人才培养工程杰出青年人才资助项目(12110600000018003926)。

摘　　要：利用Helmert转换模型,首先对起算点先验坐标可能存在的粗差进行探测并剔除,其次依据剩余起算点坐标的相似变换构建最小约束条件,最后实现整网坐标框架的确定。选取中国境内及周边IGS站和陆态网GNSS基准站单周观测数据,采用IGS站ITRF2014坐标分别构建参数加权约束、最小约束、顾及IGS站先验坐标误差的Helmert模型约束,然后利用不同的基准约束平差方法获取整网坐标成果。实验结果表明,利用Helmert模型能有效削弱起算点坐标粗差对网形扭曲的影响,在一定程度上可提高区域参考框架的精度和可靠性。Based on the Helmert transformation model,we detect and eliminate possible gross errors in the prior coordinates of the starting points.Then,we construct the minimum constraint conditions based on the similarity transformation of the remaining starting points coordinates.Finally,we determine the entire coordinate framework.We select the weekly observation data of IGS stations and GNSS reference stations in and around China,and use ITRF2014 coordinates of IGS stations to construct parameter weighted constraints,minimum constraints and Helmert model constraints,considering prior coordinate error of IGS stations to obtain coordinate results of the whole network.The results show that Helmert model method can effectively weaken the influence of gross coordinate errors of starting points on the mesh distortion,and improve the accuracy and reliability of the regional reference frame to a certain extent.

关 键 词：GNSS 起算点 参数加权约束法 最小约束平差法 Helmert模型 

分 类 号：P228[天文地球—大地测量学与测量工程]