Comparison of snow cover area (SCA) in NOAA and MODIS Images (A case study: Taleghsn Watershed)

The temporal and spatial inventory of snow cover area and snow equivalent is one of the important challenges in watershed management. The present research was carried out for comparison of snow cover area in NOAA satellite and MODIS images in the watershed area of Taleghan. For this reason، 14 NOAA satellite and MODIS contemporary images have obtained from Iranian space agency for 2003، 2004، 2005 and 2006 years. Snow cover area (SCA) was extracted from all images. Also، the NOAA and MODIS images were comprised together. The comparison of NOAA and MODIS images revealed that the accuracy average of SCA estimation error was 57. 97 percent ranging from 3. 87% to 267. 42%. Overlap of two images is good regarding to SCA، so that can be acknowledged that the overlap of two images is 100%.