The Application of TMI Polarization Ratio PR in Flooded Area Detecting and Classification
TMI被动微波遥感资料用于地表洪涝特征分析试验

By using a radiative transfer model for simulation of microwave brightness temperatures over land surface, the effects of canopy and roughness on passive microwave soil moisture retrieval results have been analyzed. In order to reduce the influence of atmosphere, surface temperature, roughness and canopy, microwave polarization ratio of TRMM/TMI was employed and we got a good result when put the polarization ratio of TRMM/TMI into the use of surface flood area detection and classification. When practied our method over Dongting and Boyang lake area of China in the summer of 1998, the classification results of Radarsat SAR and L SAR surface flood area were used, and we got a Vol./Cal. over 75 0%. Low frequency channels of TRMM/TMI at 10GHz and 19GHz, were effectual in surface flood area detection and classification.