用GPS水准数据拟合高程异常在局部控制测量中的应用  

Application of GPS Leveling Data Fitting to Height Anomaly on Local Control Survey

作　　者：陈宏伟 龚真春 高海荣 张晓博 高生飞 

机构地区：[1]第三测绘导航基地,甘肃兰州730020

出　　处：《测绘科学与工程》2015年第1期27-30,共4页Geomatics Science and Engineering

摘　　要：在GPS水准中采用多项式拟合局部地区似大地水准面，对于实际工程作业具有重要的作用。本文在简述GPS水准求取高程异常方法的基础上，结合作业测区地形实际，对所采用的多项式曲面拟合模型，从拟合点分布、拟合点数量及拟合方式等对拟合精度的影响进行分析。通过各次比较分析，找出适合测区的拟合方法，得出一些有意义的结论，以供作业参考。Fitting local quasi - geoid using the GPS leveling data has an important significance in engineering practice. Base on the fitting model and the topography of survey area, the polynomial surface fitting model is used to process, analyze and discuss the effect of the fitting point distribution, the number of fitting points and fitting ways on the fitting precision. Through the compara- tive analysis, a suitable fitting method and some conclusions are obtained that can be used for reference to engineering practice.

关 键 词：GPS水准 高程异常 多项式曲面拟合 拟合精度 

分 类 号：P223[天文地球—大地测量学与测量工程]