Progress and thoughts on establishment of geodetic coordinate frame

doi:10.11947/j.AGCS.2022.20220232

Abstract

Abstract: Coordinate frame is the basis for describing the Earth's shape and its variation, as well as geospatial information. It is also a key geospatial information infrastructure to expand human activities and promote social development. With development of space geodetic observation technologies together with integration of earth science and related disciplines, establishment of global and regional coordinate frame based on space geodetic techniques has become the main task of geodesy field at present, while the goal of building coordinate frame with 1 millimeter (mm) level prove to be both the disciplinary goal and great challenge for international geodesy community of the 21st century. Taking the most widely used International Terrestrial Reference Frame (ITRF) with perfect theory and the highest accuracy as an example, this paper firstly describes the method of establishing coordinate frame based on space geodetic technologies. Secondly, the latest progress and limitations of recent global/regional coordinate frames are illustrated. Finally, ideas for several key issues aiming at establishing the 1 mm level coordinate frame are proposed.

Key words: coordinate system, coordinate frame, space geodetic techniques, non-linear variation, multi-technique combination

CLC Number:

P228

JIANG Weiping, LI Zhao, WEI Na, LIU Jingnan. Progress and thoughts on establishment of geodetic coordinate frame[J]. Acta Geodaetica et Cartographica Sinica, 2022, 51(7): 1259-1270.

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