Accuracy evaluation of MODIS and AMSR-E snow cover products in the Heilongjiang drainage basin
黑龙江流域MODIS和AMSR-E 雪盖产品精度分析

Using meteorological site data in Heilongjiang drainage basin as the 'truth valves’,we evaluated the snow identification accuracies of MODIS snow products and AMSR-E data from 2002~2007 and analyzed the influence of cloud and altitude on the snow identification accuracy.The results showed that MOD10A2,MOD10C2,and AMSR-E snow identification accuracies are 75.4%,88.7%,and 88.9%,respectively.The existence of cloud is the main factor affecting snow identification accuracy. MOD10C2 snow identification results are close to the true values of meteorological stations and AMSR-E tends to overestimate the snow cover area.Besides,the results indicate that snow cover areas derived from the soft classification of MOD10A2 and MOD10C2 are smaller less than that derived from the hard classification,and the results obtained from the soft classification are closer to the true values.