Using double Γ function to make fitting, the effect of fitting in altostratus is better, but not better in nimbostatts;

利用二阶Γ函数拟合在高层云中的效果较好，但在雨层云中的效果相对较差；

Secondly, the research data, which use the cloud classification productions of National Satellite Meteorological Center as types' labels, are divided into Land, Mixed cloud, Altostratus or Nimbostratus, Cirrostratus, Cirrus Spissatus, Cumulonimbus and Stratocumulus or Altocumulus.

第二，每个数据的类别标签参考国家卫星气象中心的云分类产品结果，将实验数据划分为地表、混合像元、高层云或雨层云、卷层云、密卷云、积雨云以及层积云或高积云7类。