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《Chinese Journal of Geophysics》 2008-01
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Improvement of regional quasi-geoid in Qomolangma(Mt.Everest) and determination of orthometric elevation

GUO Chun-Xi~ 1,2 , NING Jin-Sheng~2, CHEN Jun-Yong~3, WANG Bin~1, LU Yang~4, SUN Feng-Hua~51 Geodetic Data Processing Center, State Bureau of Surveying and Mapping, Xi’an 710054, China2 School of Geodesy and Geomatics,Wuhan University, Wuhan 430079, China3 State Bureau of Surveying and Mapping,Beijing 100830, China4 Institute of Geodesy and Geophysics,Chinese Academy of Sciences, Wuhan 430077, China5 Xi'an Technique Central Station of Surverying and Mapping, Xi'an 710054, China  
In the paper the Qomolangma local quasi-geoid with 2.5′×2.5′ high resolution and ±9 cm high precision is for the first time determined by using the gravity data and SRTM3、1:50000 DEM、GTOPO30 topography data based on EGM96、WDM94、IGG05B、DQM2000D and CG03C of the reference gravity field models, as well as 44 GPS levelling control points in the Qomolangma mountain area. The remove-restore technology is used for the determination of the local quasi-geoid. According to the local quasi-geoid the height anomaly of the pike of Qomolangma mountain has been computed. In addition, the conversion of normal height into orthometric height of the pike of Qomolangma mountain is completed by using the new observed gravity data along the mountain-climbing way and topography data in the Qomolangma mountain area on the basis of the rigorous theory of the gravity reduction and the remove-restore technology.
【Fund】: 国家自然科学基金重点项目(40637034);; 国家测绘局青年学术和技术带头人科研计划(200639)资助
【CateGory Index】: P223
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