【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。更多还原

【Abstract】 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.更多还原