| 珠峰地区似大地水准面精化与珠峰顶正高的确定 |
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| 引用本文： | 郭春喜,宁津生,陈俊勇,王斌,陆洋,孙凤华.珠峰地区似大地水准面精化与珠峰顶正高的确定[J].地球物理学报,2008,51(1):101-107. |
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| 作者姓名： | 郭春喜 宁津生 陈俊勇 王斌 陆洋 孙凤华 |
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| 作者单位： | 1.国家测绘局大地测量数据处理中心，西安 710054;2.武汉大学测绘学院，武汉 430079;3.国家测绘局，北京 100830;4.中国科学院测量与地球物理研究所，武汉 430077;5.西安测绘信息技术总站，西安 710054 |
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| 基金项目： | 国家自然科学基金，国家测绘科技发展基金 |
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| 摘 要： | 本文使用珠峰及其周边地区的重力数据与SRTM3、1∶50000 DEM、GTOPO30地形数据，以该地区的44个GPS水准点为控制，选择国内外的EGM96、WDM94、IGG05B、DQM2000D和CG03C作为参考重力场模型，采用移去-恢复技术，首次完成了珠峰地区分辨率为2.5′×2.5′高精度似大地水准面，其精度达到±9 cm，并据此推算了珠峰顶高程异常值. 再利用登山线路上的新测重力点与珠峰地形数据，依据严格的重力归算理论及移去-恢复技术，完成了珠峰顶似大地水准面与大地水准面差值计算，即珠峰正常高与正高的换算.
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| 关 键 词： | 珠穆朗玛峰 地球重力场模型 均衡模型 似大地水准面 GPS水准 移去-恢复技术 |
| 文章编号： | 0001-5733（2008）01-0101-07 |
| 收稿时间： | 2006-09-05 |
| 修稿时间： | 2007-09-07 |
Improvement of regional quasi-geoid in Qomolangma(Mt. Everest) and determination of orthometric elevation |
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| GUO Chun-Xi,NING Jin-Sheng,CHEN Jun-Yong,WANG Bin,LU Yang,SUN Feng-Hua.Improvement of regional quasi-geoid in Qomolangma(Mt. Everest) and determination of orthometric elevation[J].Chinese Journal of Geophysics,2008,51(1):101-107. |
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| Authors: | GUO Chun-Xi NING Jin-Sheng CHEN Jun-Yong WANG Bin LU Yang SUN Feng-Hua |
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| Institution: | 1.Geodetic Data Processing Center, State Bureau of Surveying and Mappi;ng, Xi’an 710054, China;2.School of Geodesy and Geomatics,Wuhan University, Wuhan 430079, China;3.State Bureau of Surveying and Mapping,Beijing 100830, China;4.Institute of Geodesy and Geophysics,Chinese Academy of Sciences, Wuhan 430077, China;5.Xi'an Technique Central Station of Surverying and Mapping, Xi'an 710054, China |
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| Abstract: | 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. |
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| Keywords: | Pike of Qomolangma mountain Earth gravity field model Isostasy model Quasi-geoid GPS levelling Remove-restore technology |
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