Monday 22 August 2005

G4

PM0030
Re-analysis of continuous GPS reference stations in mainland China from 1999 to 2003
Dang, Yamin¹, Bei, Jinzhong, Jiang, Zhihao, Chen, Junyong³
1 Chinese Academy Of Surveying And Mapping, Beijing, China
2 National Geomatic Center of China, Beijing, China
3 State Bureau of Surveying and Mapping, Beijing, China
Author email: dangym@casm.ac.cn
The continuous GPS reference stations in mainland China are the most important part of the China new geodetic reference frame. The primary purpose of re-analyzing these continues GPS data is to assess the data quality and station stability under ITRF2000 reference frame. The GPS time series analysis were also conducted, and the continues GPS data were collected from GPS reference stations of State Bureau of Surveying and Mapping (SBSM) in China, some sites belongs to the Crust Movement Observation Network of China (CMONOC) were also collected, totally 28 sites were included. The preliminary analysis results revealed the velocities and some sorts of change trends at these regional reference stations. The further investigations such as simulating these change trends, some geodynamical implication studies were also conducted at most stations. The periodical change trends in vertical components are consistent with the groundwater change in these sites, and the unitary change revealed the decline trends at most stations, especially in south part of China.

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