用于气象中nc数据的提取，提取为grd格式，便于之后的fortran编程，有多层的也有单层的，为gs-Fortran programming is used to the nc data Meteorology extract, extract grd format, easy, multilayered single layer for gs

经验正交函数分析方法，是一种分析矩阵数据中的结构特征，提取主要数据特征量的一种方 法。常用于海洋、气象专业。-Empirical orthogonal function analysis method is an analysis of the data structure of the matrix, a method of extracting the main characteristics of the data volume. Commonly used in the marine

根据中国气象数据网下载的全国气象站点的数据，批量提取所需站点的数据。(According to the data of the national meteorological station, which is downloaded by the China Meteorological data network, the data of the required sites are extracted.)