文档介绍：基于MATLAB的GPS水准拟合方法及应用
摘要
GPS高程拟合是GPS研究领域的一个热点。提高GPS的定位精度以及GPS高程转换精度,可以得到较高精度的GPS水准高程。实践证明根据实际情况选择正确的转换方法获得的GPS水准高程的精度可以广泛地应用到工程、变形监测等各个方面中去,这将拓宽GPS的应用领域,真正的实现GPS的三维优越性。使备受青睐的GPS有更好的应用前景。本文系统的研究了GPS高程拟合原理,分析了各种拟合模型,论述了影响GPS高程的误差源和改正方法,以及精度评定的标准。
论文首先介绍了高程系统起算边及相互关系,其中分别介绍了大地水准面、正高与正高系统,似大地准面、正常高与正常高系统,参考椭球面、大地高与大地高系统,并用作图形象的表示出正高、正常高与大地高之间的关系。其次分析和探讨了GPS高程拟合的方法,将其分为三类:多项式曲线拟合,多项式曲面拟合和多面函数拟合,然后分别介绍了这三种方法的基本原理和计算步骤。最后通过实例分析了这三种拟合方法的优缺点。
关键词:高程系统;GPS高程拟合;多面函数拟合;精度分析
GPS Leveling Fitting Method and Application
Based on the MATLAB
ABSTRACT
GPS elevation fitting is a hot research field about GPS positioning accuracy of GPS elevation conversion and precision, and can geting a high accuracy of GPS level has proved according to the actual situation of choosing the right method for the conversion of the accuracy of GPS level elevation can be widely applied to engineering, deformation monitoring and other aspects, this will broaden the application field of GPS, really realize the GPS 3 d very exciting and popular better application prospect of GPS. This paper studies the elevation of the system GPS fitting principle and the analysis of the various fitting model, discusses the influence of the error sources and GPS elevation correction method, and evaluate accuracy standard.
It firstly introduced vertical system date edge and mutual relationship, which respectively introduced the geoid, ortho metric height and ortho metric height system,Like the earth must face, normal high and normal high system,reference ellipsoid, like the earth must face, normal high and normal high system reference ellipsoid, the earth and the earth high high system, and the image of the drawing showed ortho metric height normal high and the earth, the relationship between the analyzed and discussed on GPS elevation fitting method, which is divided into three categories: polynomial curve fitting, polynomial fitting of surface and ma