over 75 0%. Low frequency channels of TRMM/TMI at 10GHz and 19GHz, were effectual in surface flood area detection and classification.

• 洪涝区分类结果与经过天 -地校验过的机载和星载SAR资料地表洪涝分类实况对比 ,TRMM/TMI低频微波通道微波极化比 1 0GHz的PR1 0和 1 9GHz的PR1 9的分类正确率不低于 75%25。