REFINEMENT AND APPLICATION OF CHENGDU QUASI-GEOID
Li Chunhua 1,3) ; Huang Dingfa 1) ; Luo Zhicai 2) ; and Deng Fang 3)
1)School of Civil Engineering，Southwest Jiaotong University，Chengdu 6100312)School of Geodesy and Geomatics, Wuhan University, Wuhan 4300793)Chengdu City Institute of Surveying and Investigation, Chengdu 610081
Abstract By use of 10 314 discrete gravity data, 211 GPS/ leveling data, digital terrain model with 30″×30″ resolution and global earth’s gravity field model WDM94,the quasigeoid of Chengdu with 1′×1′ resolution, is constructed with removerestore technique. The modeled geoid heights are tested with observed 20 GPS/ leveling data that were not applied to the construction of Chengdu quasigeoid. The test results show that the standard deviation of the differences is ±0.009 m. The systematic bias of the two traditional vertical network was detected and analyzed by use of Chengdu quasigeoid.
Key words ：
Chengdu quasigeoid
removerestore technique
gravity
GPS/leveling
systematic bias
Received: 01 January 1900
Corresponding Authors:
Li Chunhua
Cite this article:
Li Chunhua,Huang Dingfa ,Luo Zhicai et al. REFINEMENT AND APPLICATION OF CHENGDU QUASI-GEOID[J]. , 2009, 29(1): 83-87.
Li Chunhua,Huang Dingfa ,Luo Zhicai et al. REFINEMENT AND APPLICATION OF CHENGDU QUASI-GEOID[J]. jgg, 2009, 29(1): 83-87.
URL:
http://www.jgg09.com/EN/ OR http://www.jgg09.com/EN/Y2009/V29/I1/83
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