Volume 31 Issue 12
Dec.  2006
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NING Jinsheng, GUO Chunxi, WANG Bin, WANG Huimin. Refined Determination of Vertical Deflection in China Mainland Area[J]. Geomatics and Information Science of Wuhan University, 2006, 31(12): 1035-1038.
Citation: NING Jinsheng, GUO Chunxi, WANG Bin, WANG Huimin. Refined Determination of Vertical Deflection in China Mainland Area[J]. Geomatics and Information Science of Wuhan University, 2006, 31(12): 1035-1038.
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Refined Determination of Vertical Deflection in China Mainland Area

  • 1 School of Geodesy and Geomatics,Wuhan University,129 Luoyu Road,Wuhan 430079,China;2 Geodetic Data Processing Center,State Bureau of Surveying and Mapping,334 East Youyi Road,Xi'an 710054,China

Funds: 国家自然科学基金资助项目(40074005)
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  • Received Date: August 17, 2006
  • Revised Date: August 17, 2006
  • Published Date: December 04, 2006
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  • In the simultaneous adjustment of Astro-geodetic network 1980 and China National GPS geodetic control network 2000,in order to reduce the geodetic observation data to the ellipsoid of WGS84,the technique of remove-restore and Earth gravity model is adopted to refined calculate the deflection of the vertical of 48 919 geodetic point in WGS84,by using the gravity data and 30″×30″ DEM in whole country.And the observation deflection of the vertical of 115 astronomic points in WGS84 is used to the exterior precision check.The total accuracy of the deflection of the vertical in a north-south direction is 1.45″,and that in a east-west direction is 1.50″.The result has been already used in the simultaneous adjustment of two geodetic networks.
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