主要读取HDF文件的IDL源码程序，具体的，读取Seawifs、Modis 的3级产品，hdf格式的数据，对其他的hdf格式数据，可参考之编程。-The main reading HDF files IDL source procedures, specific, read Seawifs, Modis of three products, hdf format data, the hdf format of other data, may refer to the programming.