14. Microwave Land surface Emissivity Estimation over the Indian Subcontinent from Satellite data Author： Tinu Antony, Korak Saha, Suresh Raju and K. Krishnamoorthy Affiliation： Vikram Sarabhai Space Center,ISRO The microwave land emissivity for the Indian subcontinent (lat: 00 – 400N & Long: 60-1000E) is retrieved from the DMSP Special Sensor Microwave/Imager (SSM/I) data for the years 2007 and 2008 and monthly mean emissivity maps of Indian Subcontinent for all the SSM/I channels are generated for the two years. Wide variety of geographical features and climatic conditions prevail over the Indian sub-continent and their detailed characterization in terms of microwave emissivity has been studied in detail. Apart from that, the Indian monsoon which is a unique feature also influences the land use/land cover and climatic variability over this region. Based on the microwave emissivity maps, the spectral and seasonal variations of various land classes are analyzed using multifrequency and dual polarization data. Such analyses have potential applications in land surface charcterisation (waterlogged marsh lands/ arid or semiarid regions , sandunes and rock cutcrop, snow and ice cover) and to discriminate various vegetation classes like the tropical rain forest, deciduous forest, etc. The seasonal and interannual variability of emissivity of different land surface classes like tropical evergreen and deciduous forests, agriculture area, wet land and deserts region like the hot deserts (Thar) and cold deserts(Taklamakan) have also been studied. The study also extended for assessing the flood affected area in the Indian Subcontinent during the Indian monsoon for a period of four years (2007-2010).