基于曲面拟合的GPS高程转换精度分析

针对大面积、地形复杂区域的GPS高程转换的精度问题,本文在对GPS高程拟合的基本原理及其具体的数学模型,如平面拟合、相关平面、二次曲面、三次曲面拟合模型进行研究的基础上,通过对新疆某区域的GPS/水准试验数据,利用Mat LAB软件进行编程计算,结果表明:平面拟合及二次曲面拟合模型对于试验区域的高程拟合复精度较差,而三次曲面拟合模型的转换精度较高,能满足后续的测量需要。

Based on Surface Fitting Accuracy of GPS Height Transformation

Accuracy problems for large , complex terrain areas of GPS Height Transformation paper by the basic principles of GPS ele-vation fitting their specific mathematical models such as flat fitting correlation plane , two surfaces , three-dimensional curve fitting model based on the research , an area in Xinjiang by GPS /leveling test data , using MATLAB software programming calculation results show that the plane and the second fitting surface fitting model fitting test area for the elevation accuracy is poor , and the three surfaces high conversion precision fitting model , to meet the subsequent measurement needs .