期刊
IEEE TRANSACTIONS ON GEOSCIENCE AND REMOTE SENSING
卷 46, 期 11, 页码 3574-3580出版社
IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
DOI: 10.1109/TGRS.2008.2000819
关键词
Image processing; meteorology; remote sensing
An objective technique for obtaining features associated with the shape and dynamics of cloud structures embedded in tropical cyclones from satellite infrared images is described. As the tropical cyclone develops from an unstructured cloud cluster and intensifies, the cloud structures become more axisymmetric about an identified reference point. Using variables derived from remotely sensed data, the technique calculates the gradient of the brightness temperatures to measure the level of symmetry of each structure, which characterizes the degree of cloud organization of the tropical cyclone. The results presented show that the technique provides an objective measure of both the structure and the intensity of the tropical cyclone from early stages, through intensification, maturity, and dissipation.
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