利用原有似大地水准面成果多项式拟合GPS/水准高程的精度估计  

The Estimation of the Precision of Fitting GPS/Leveling Elevation Based on Original Quasi-geoid with Polynomial Method

作　　者：沈飞[1] 宋玉兵[1] 隋铭明[2] 

机构地区：[1]江苏省测绘工程院,江苏南京210013 [2]南京林业大学土木工程学院,江苏南京210037

出　　处：《现代测绘》2006年第3期20-22,共3页Modern Surveying and Mapping

摘　　要：多项式拟合在GPS高程拟合中最常采用,但是直接拟合高程异常的方法在高程异常变化不平缓的地区精度较差。本文试图在利用已有局部似大地水准面资料的基础上拟合高程异常残差,进而确定局部内小地区的正常高。本文首先阐述了四次多项式拟合的基本原理以及精度评定方法,然后具体算例,实际计算分析了此种拟合方法的精度。同时接合得出的结果,对小地区似大地水准面的二次精化提出了有益的建议。Polynomial method is usually used in fitting the GPS/level elevation, but it couldn＇t obtain the good results when the gravity anomaly is uneven, in this article, the author try to use the new method which fitting the remained difference by subtracting the original quasi- geoid data. Firstly, the author discusses the theory of the fitting method and precision estimate, and then analyzes the precision through calculating a practical example. Finally, the author gives some suggestions in fitting small regional quasi - geoid as well.

关 键 词：精度估算 多项式拟合 GPS/水准 二次精化 似大地水准面 

分 类 号：P228.4[天文地球—大地测量学与测量工程]