区域似大地水准面精化模型分析研究  

Analysis and Research of Regional Quasi-geoid Refinement Model

作　　者：王文景 WANG Wenjing(Changzhou Natural Resources and Planning Service Center,Changzhou 213000,China)

机构地区：[1]常州市自然资源和规划服务中心,江苏常州213000

出　　处：《测绘与空间地理信息》2025年第2期214-216,共3页Geomatics & Spatial Information Technology

摘　　要：为获取研究区似大地水准面精化模型,本文以研究区C、D级GNSS静态观测和三等水准联测数据以及EGM2008重力模型为基础,采用多面函数拟合法对研究区似大地水准面模型进行精化,模型内、外符合精度均满足规范和使用要求;并利用三等水准测量方法获取检核点水准高程,拟合高程与水准高程差值较小,将拟合高程代入三等水准测量观测路线进行重新平差计算,闭合差和单位权中误差均满足限差要求,表明本文获得的研究区似大地水准面精化模型精度较高,可满足研究区D级GNSS高程测量取代三、四等水准测量的需求,大大提高了控制测量效率,具有较高的实用价值。In order to obtain the quasi-geoid refinement model in the study area,this paper refined the quasi-geoid model in the study area by using the Hardy Function Interpolation method on the basis of the static observation data of C and D level GNSS,the third-order level joint measurement data and the gravity model EGM2008.The internal and external coincidence accuracy of the model met the specification and application requirements.The level elevation of the check point is obtained by using the third-order leveling method,and the difference between the fitted elevation and the level elevation is small.The fitted elevation is replaced into the third-order leveling observation route for re-adjustment calculation.The closure error and the unit weight error meet the requirements of the tolerance,indicating that the accuracy of refinement model of the quasi-geoid in the study area obtained in this paper is high.It can meet the demand of D level GNSS elevation survey in the study area,substitutes third-order and fourth-order leveling survey,greatly improves the efficiency of control survey,and has high practical value.

关 键 词：似大地水准面 高程异常 GNSS 精度分析 

分 类 号：P223[天文地球—大地测量学与测量工程]