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以向日葵8号观测侦测过冲云的方法与实验Methods and Experiments of Detecting Overshooting Top by Using Himawari-8 Imagery
过冲云, 水汽频道, 红外窗区频道Overshooting Top, Water Vapor Channel, Infrared Window Channel
《Advances in Geosciences》, Vol.6 No.3, 2016-06-28
Detection of overshooting top experiments with three different methods has been conducted by using Himawari-8 data. We used the IRW-texture method and the algorithm based on different brightness temperature between water vapor and infrared window channel in this study. And we provided a local minimum method which combined the characteristic of both methods as men-tioned above. In this method, we tried to avoid using information from numerical weather forecast as in IRW-texture method. And we designed the method to minor false detection as the algorithm based on different brightness temperature between water vapor and infrared window channel. To estimate the accuracy of overshooting top detection algorithms, results from those methods have been compared with deep convection RGB image, visible image, and enhanced infrared imagery. In this primary test, the local minimum method shows its potential in detection of overshooting top.