一种最新的经验投影函数GMF分析

英文篇名：ANALYSIS OF A NEW EMPIRICAL MAPPING FUCTION GMF
中文刊名：大地测量与地球动力学
英文刊名：Journal of Geodesy and Geodynamics
作者：姜卫平 ; 李昭 ; 邱蕾
英文作者：Jiang Weiping1) ; Li Zhao2) and Qiu Lei2)1)GNSS Research Center ; Wuhan University ; Wuhan 4300792)School of Geodesy and Geomatics ; Wuhan University ; Wuhan 430079
中文关键词：全球投影函数 ; 数值天气模型 ; 分段线性估计 ; Niell投影函数 ; 维也纳投影函数
英文关键词：GMF(Global Mapping Function) ; NWM(Numerical Weather Model) ; piecewise linear estimation ; NMF(Niell Mapping Function) ; VMF(Vienna Mapping Function)
出版日期：2009-10-15
机构：武汉大学卫星导航定位技术研究中心;武汉大学测绘学院;
年：2009
期：05
出版单位：大地测量与地球动力学

摘要

介绍一种可以在全球范围使用的投影函数GMF,由GMF计算得到的对流层延迟分别与分段线性估计的延迟及NMF模型的数值分析结果比较表明,GMF是一种精度更高且易于软件实现的经验投影函数,具有很好的实用价值。
This paper introduces the principle and effect of a new mapping function that could be used globally and easy to realize with software:the Global Mapping Function(GMF).Using the tropospheric delay obtained by the method of piecewise linear estimation as true value,we make comparisons between result from GMF and the true value,as well as NMF.By analyzing the differences among these three methods and their connections,some beneficial conclusions have been drawn.Numerical experiments show that GMF is an empirical mapping function with higher accuracy and easier implementation,thas is to very practical for us to choose.

引文

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