基于二次曲面及多面函数的GPS高程拟合研究  

GPS Height Fitting Based on Conicoid Function and Multi-faceted Function

作　　者：周明明[1] 王山东[1] 王璐[1] 

机构地区：[1]河海大学地球科学与工程学院,南京210098

出　　处：《计算机与数字工程》2014年第2期315-318,共4页Computer & Digital Engineering

摘　　要：为实现GPS大地高到正常高的转换,采用二次曲面拟合法和多面函数拟合法建立拟合模型,通过实例对模型关键问题和拟合精度进行分析,重点研究光滑因子的选取对核函数的影响,通过比较两种模型的拟合精度,得出在该相对平坦的研究区域二次曲面拟合精度相对较高。In order to achieve GPS＇s conversion from height to nomal height,the conicoid function method and the multi-faceted function method are used to fit the height anomaly.The key points and fitting accuracy of modeling are analyzed through examples and great emphasis is put on finding out how the selection of the smoothing factor affects the kernel function.By comparing the fitting accuracy of the two models,the fitting accuracy is relatively high in this relatively flat area.

关 键 词：高程异常 二次曲面拟合 多面函数拟合 光滑因子 核函数 

分 类 号：TP391[自动化与计算机技术—计算机应用技术]