Journal of Geodesy and Geoinformation Science ›› 2023, Vol. 6 ›› Issue (3): 9-18.doi: 10.11947/j.JGGS.2023.0302

• Literature Review • Previous Articles     Next Articles

Maintenance of Millimeter-level Geodetic Reference Framework

Yamin DANG1(), Hu WANG1(), Fuping SUN2, Guangwei JIANG3, Xinhui ZHU2, Yingyan CHENG1, Qiang YANG1, Yingying REN4, Jing JIAO1   

  1. 1. Chinese Academy of Surveying and Mapping, Beijing 100036, China
    2. Institute of Geospatial Information, Information Engineering 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
  • Received:2023-08-21 Accepted:2023-08-26 Online:2023-09-20 Published:2023-10-31
  • Contact: Hu WANG (1982—), male, PhD, researcher, majors in geodetic datum and its application in geoscience. E-mail: wanghu@casm.ac.cn
  • About author:Yamin DANG (1965—), male, PhD, researcher, majors in geodetic datum and geodynamics. E-mail: dangym@casm.ac.cn
  • Supported by:
    National Natural Science Foundation of China(42274044);National Natural Science Foundation of China(41974010);National Natural Science Foundation of China(42330113);National Natural Science Foundation of China(41804018)

Abstract:

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.

Key words: reference framework; millimeter level; dynamic maintenance; repro3; BDS3; CTRF2020