“Global Geodetic Benchmark Dynamic Correction and Service” project passed the acceptance

[ China Instrument Network Instrument Development ] On October 10, 2018, the “Global Geodetic Benchmark Dynamic Correction and Service” project in the field of Earth observation and navigation technology of the National 863 Program successfully passed the acceptance inspection organized by the Ministry of Science and Technology.

The project is aimed at non-autonomous benchmark parameter determination, non-multiple technology fusion, and static situational regional benchmarks in the geodetic benchmark based on single GPS technology. It has been developed for the global dynamic geocentric coordinate reference frame maintenance and elevation benchmark modernization. The technical research of the year, the construction of a three-dimensional variation inversion model of the Earth's centroid combined with seafloor pressure and GNSS uniform monitoring, land site distribution equilibrium evaluation model, global plate motion model, global frame point nonlinear change motion model, etc. The model solves the technical problems of dynamic global reference system parameter determination, multi-technology and multi-data source fusion, global dynamic geocentric coordinate frame refinement, global benchmark linear and nonlinear dynamic maintenance, big data solution, etc. Framework fusion processing software and geocentric coordinate reference framework distributed data management software prototype.

Through the implementation of this project, China has formed an independent and independent global framework dynamic construction and maintenance theory and method system. Most of the project technical methods have reached the world advanced level, and the relevant results are equivalent to the same products in the world, in order to meet the national economic construction, national defense construction, science. The research and the modernization of the surveying and mapping industry have provided technical support for the urgent need for high-precision dynamic benchmarks, providing a unified benchmark framework for the implementation of the National “Belt and Road” initiative. The project results have an important role in building and maintaining the Beidou global benchmark with Chinese characteristics. It can promote the development of Beidou related industries and has broad application prospects. Some of the results have been successfully used in national benchmarks, major projects and provincial local benchmark establishment and maintenance. .

(Original title: China's own centimeter-level geocentric coordinate reference frame provides a benchmark framework for the “Belt and Road”)