GPS高程拟合法比较以及精度分析  

Comparison of GPS Elevation Fitting Method and Accuracy Analysis

作　　者：郑荃心 ZHENG Quanxin(The Second Geological Brigade of Guangdong Geological Bureau,Shantou Guangdong 515000,China)

机构地区：[1]广东省地质局第二地质大队

出　　处：《北京测绘》2019年第8期974-978,共5页Beijing Surveying and Mapping

摘　　要：利用GPS测量高程代替水准高程时,选取合适的GPS高程拟合方法是必不可少的。本文利用某测区94个已知点作为实验数据,其中65个作为建模点,29个作为检验点,利用不同的函数模型法和不同的统计模型法建立实验区的GPS高程拟合模型,并通过MATLAB语言设计实现GPS高程拟合模型的建立以及精度分析。通过对比分析实验证明:移动曲面拟合法是本文列举函数模型法中拟合效果最好的;基于二次曲面的Shepard拟合法是本文列举统计模型法中效果更好。when GPS was used to measure elevation instead of leveling height, it is essential to select suitable GPS height fitting method.In this paper, 94 known points in a certain area were used as experimental data.65 of them were used as modeling points and 29 as test points.The GPS elevation fitting model of experimentation area are established by different function model method and different statistical model method, and the establishment of GPS elevation fitting model and accuracy analysis were realized by MATLAB language design.It was proved by comparison and analysis that moving surface fitting was the best fitting effect in the method of enumerating function model, and the Shepard fitting method based on the two surface was better in the enumeration of statistical model.

关 键 词：全球定位系统(GPS) 高程拟合 函数模型法 统计模型法 精度 

分 类 号：P258[天文地球—测绘科学与技术]