湖南省似大地水准面模型对比研究  

作　　者：喻艳梅[1] 尹羿晖 

机构地区：[1]湖南工程职业技术学院,长沙410151

出　　处：《科技创新与应用》2024年第26期109-112,共4页Technology Innovation and Application

基　　金：2022年湖南省自然资源科技计划项目(2022G19)。

摘　　要：正常高系统是以似大地水准面为基准的高程系统,也是中国目前采用的高程系统。随着GNSS定位技术的广泛应用,已能在10-7~10-9的精度量级上获得测量点的平面位置,但是却一直未能以相应的精度求解点的高程值。因此,通过建立高精度、高分辨率的区域似大地水准面模型提升高程测量的精度,成为重要的技术手段。该文通过对湖南省2007似大地水准面模型后期各似大地水准面模型的对比研究,找到模型的差异,并对差异较大的地区进行特征分析,查找形成差异的原因,可为全省二、三等水准网测量和大地水准面再精化工作提供参考。The normal height system is an elevation system based on the quasi-geodetic level,and it is also the elevation system currently used in China.With the wide application of GNSS positioning technology,the plane position of the measuring point can be obtained in the order of the accuracy ranging from 10-7 to 10-9,but the elevation value of the point has not been solved with the corresponding accuracy.Therefore,it has become an important technical means to improve the accuracy of elevation survey by establishing a regional quasi-geoid model with high precision and high resolution.In this paper,through the comparative study of the quasi-geoid models in the later stage of the 2007 quasi-geoid model in Hunan Province,the differences of the models are found,and the characteristics of the areas with great differences are analyzed to find out the reasons for the differences,so as to provide reference for the second and third order leveling network survey and geoid re-refinement in the whole province.

关 键 词：大地水准面 高程异常 似大地水准面模型 等值线图 模型对比 

分 类 号：P224[天文地球—大地测量学与测量工程]