成都市似大地水准面的精化及应用  

REFINEMENT AND APPLICATION OF CHENGDU QUASI-GEOID

作　　者：李春华[1,2] 黄丁发[1] 罗志才[3] 邓芳[2] 

机构地区：[1]西南交通大学土木工程学院,成都610031 [2]成都市勘察测绘研究院,成都610081 [3]武汉大学测绘学院,武汉430079

出　　处：《大地测量与地球动力学》2009年第1期83-87,共5页Journal of Geodesy and Geodynamics

基　　金：成都市似大地水准面精化项目(200703066)

摘　　要：利用10 314个重力点数据、211个高精度GPS水准点数据、30″分辨率的数字地形模型(DTM)及地球重力场模型WDM94,基于移去-恢复技术确定了成都市1′×1′格网似大地水准面模型。以20个高精度GPS水准点对该成果进行外部检验,结果表明所确定的似大地水准面模型精度为±0.009 m。利用成都市似大地水准面模型探测和分析了两个传统高程控制网中可能存在的系统偏差。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 quasi-geoid of Chengdu with 1′×1′ resolution, is constructed with remove-restore technique. The modeled geoid heights are tested with observed 20 GPS/ leveling data that were not applied to the construction of Chengdu quasi-geoid. 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 quasi-geoid.

关 键 词：成都市似大地水准面 移去-恢复技术 重力 GPS水准 系统偏差 

分 类 号：P223[天文地球—大地测量学与测量工程]