Maintenance of Millimeter-level Geodetic Reference Framework  

作　　者：Yamin DANG Hu WANG Fuping SUN Guangwei JIANG Xinhui ZHU Yingyan CHENG Qiang YANG Yingying REN Jing JIAO 

机构地区：[1]Chinese Academy of Surveying and Mapping,Beijing 100036,China [2]Institute of Geospatial Information,Information Engi-neering University,Zhengzhou 450052,China [3]Geodetic Data Processing Centre of Ministry of Natural Resources,Xi’an 710054,China [4]College of Surveying and Geo-Informatics,Tongji University,Shanghai 200092,China

出　　处：《Journal of Geodesy and Geoinformation Science》2023年第3期9-18,共10页测绘学报（英文版）

基　　金：National Natural Science Foundation of China(Nos.42274044,41974010,42330113,41804018)。

摘　　要：The high-precision terrestrial reference frame,as the spatial benchmark for geodesy,is an important national infrastructure.However,due to the influence of nonlinear factors related to geophysical phenomena,the overall maintenance accuracy of the ITRF framework is still at the centimeter level.Therefore,accurately characterizing the true trajectories of linear motion,nonlinear motion,and geocentric motion of the reference station is the key to achieve the construction and maintenance technology of a millimeter level terrestrial reference framework.Based on long-term global and regional GNSS observation data,more Chinese geodesy scientists devoted much efforts to the maintenance of millimeter-level geodetic reference framework.The main contributions of this work included the followings:①Dynamic maintenance of millimeter-level terrestrial reference frame;②Research progress on the method of maintenance of regional reference frame based on GNSS;③The progress of CGCS2000 frame maintenance in millimeter level accuracy;④Reprocessing and reanalysis of two-decade GNSS observation in continental China;⑤Research on current GNSS velocity field model and deformation in Chinese mainland;⑥The preliminary realization and evaluation of CTRF2020.

关 键 词：reference framework millimeter level dynamic maintenance repro3 BDS3 CTRF2020 

分 类 号：P22[天文地球—大地测量学与测量工程]