FY-2C资料对西北太平洋海域云分类的研究

he tests of navigation are carried out by using the 31 images data of FY-2C in Aug 2006, and the result shows the navigation error less than 0.13 scan line which is enough for the cloud classification analysis. Two methods of cloud classification (nephanalysis and cluster analysis) are presented and the classifying distributions are compared with the FY-2C NOM cloud product. The cloud categories obtained in nephanalysis is more than FY-2C NOM cloud product, and the middle/low clouds are recognized well by nephanalysis. The results by cluster analysis are better than NOM cloud product, and the cloud distribution are more close to the realistic situation.