基于Matlab的移动曲面拟合法GPS高程拟合  

GPS Elevation Fitting Based on Moving Surface Fitting Method in Matlab

作　　者：刘笑 Liu Xiao(Jiangsu Institute of Surveying and Mapping Engineering,Nanjing 210019)

机构地区：[1]江苏省测绘工程院,南京210019

出　　处：《北斗与空间信息应用技术》2024年第3期27-30,共4页

摘　　要：GPS以其精度高、全天候、成本低、效率高等特点被广泛应用于测绘及其他领域。但由于GPS所测得高程(大地高)和工程实际应用的高程(正常高)起算面不一致,它们之间存在一个差值——高程异常。所以需要进行高程拟合。GPS高程拟合是GPS研究领域的一个热点。传统拟合方法操作复杂,计算烦琐,且拟合成果精度较低。Matlab软件的出现为解决这些问题提供了一个良好的作业平台。文章介绍了移动曲面函数拟合法在GPS高程拟合中的应用,设计Matlab程序得以实现,并认证其可行性和精度。GPS is widely used in surveying and mapping as well as other fi elds due to its high accuracy,all-weather capability,low cost,and high efficiency.However,there is a difference between the elevation measured by GPS(geodetic height)and the elevation used in practical engineering applications(normal height)due to inconsistent datum surfaces.This difference is known as the height anomaly.Therefore,height fi tting is necessary.GPS height fi tting is a hot topic in GPS research.Traditional fi tting methods are complicated to operate,cumbersome to calculate,and result in low fi tting accuracy.The emergence of Matlab software provides a good platform for solving these problems.This paper introduces the application of the moving surface function fi tting method in GPS height fi tting,designs a Matlab program to implement it,and verifi es its feasibility and accuracy.

关 键 词：移动曲面拟合法 GPS高程拟合 MATLAB软件 

分 类 号：P22[天文地球—大地测量学与测量工程]