Acta Geodaetica et Cartographica Sinica ›› 2017, Vol. 46 ›› Issue (10): 1327-1335.doi: 10.11947/j.AGCS.2017.20170336

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The Current Status and Tendency of China Millimeter Coordinate Frame Implementation and Maintenance

CHENG Pengfei, CHENG Yingyan   

  1. Chinese Academy of Surveying and Mapping, Beijing 100830, China
  • Received:2017-06-25 Revised:2017-09-05 Online:2017-10-20 Published:2017-10-26
  • Supported by:
    The National Key Research and Development Program of China(No. 2016YFB0501405)

Abstract: The paper discusses differences between China Geodetic Coordinate System 2000 (CGCS2000) and later updated ITRF versions, such as ITRF2014, in terms of technical implementation and maintenance. With progress of space geodetic technology, also the development of the BeiDou navigation satellite system, especially third generation of BDS with signal global coverage in the future, it is possible for us to establish a global millimeter-level reference frame based on space geodetic technology including BDS. The millimeter reference frame implementation concerns two factors:① The variation of geocenter motion estimation; ② the site nonlinear motion modeling. In this paper, the geocentric inversion methods are discussed and compared among results derived from various technical methods. Our nonlinear site movement modeling focuses on singular spectrum analysis method, which is of apparent advantages over earth physical effect modeling. All presented in the paper expected to provide reference to our future CGCS2000 maintenance.

Key words: CGCS2000, coordinate system, geocenter inversion, nonlinear

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