GPS高程拟合模型在桥梁控制网中的应用  

Application of GPS Leveling Fitting Model in Control Network for Bridges

作　　者：陆吉 兰孝奇[1] 

机构地区：[1]河海大学地球科学与工程学院,江苏南京210009

出　　处：《测绘与空间地理信息》2013年第5期146-147,150,共3页Geomatics & Spatial Information Technology

摘　　要：GPS水准模型在很大程度上决定着拟合精度的高低,采用不同的模型,对GPS水准拟合的情况将产生不同的影响,因此,模型的选取对GPS水准来说是个关键问题。本文分别选取了二次曲面模型和多面函数模型,对某大型桥梁控制网数据进行拟合,拟合结果表明两种拟合模型都达到了一定的精度,但多面函数模型优于二次曲面模型。To a large extent,GPS leveling model determines the fitting precision.Different models fit the situation of the GPS leveling with different results.Therefore the selection of the GPS leveling model is a key issue.In this paper,the quadratic surface fitting model and the multi-faceted function model are selected to fit data of a control net of a large bridge,and the fitting results show that two kinds of fitting models have reached a certain degree of accuracy,but the multi-faceted function model is better than the quadratic surface fitting model.

关 键 词：GPS 高程异常 曲面拟合 多面函数 

分 类 号：P2[天文地球—测绘科学与技术]