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APPARATUS AND METHOD FOR EXTRACTING OBJECTIVE STEERING FLOW OF TROPICAL CYCLONE USING POLAR COORDINATE SYSTEM DEFINED ON CURVED SURFACE
APPARATUS AND METHOD FOR EXTRACTING OBJECTIVE STEERING FLOW OF TROPICAL CYCLONE USING POLAR COORDINATE SYSTEM DEFINED ON CURVED SURFACE
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机译:利用在曲面上定义的极性坐标系提取热带气旋目标转向流的装置和方法
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摘要
The present invention relates to an apparatus and method for extracting an objective steering flow of a tropical cyclone using a polar coordinate system defined on a curved surface, which objectively analyze the steering flow of the tropical cyclone from global grid data to increase the forecast reliability of a tropical cyclone track. The apparatus comprises: a global flow extraction unit configured to separate global grid point meteorological data using a high-order filter on a spherical surface to extract a global flow larger than a tropical cyclone; a curved-surface polar coordinate system conversion unit configured to define a polar coordinate system on a curved surface to convert the global grid point meteorological data into data in a curved-surface coordinate system; a throughflow extraction unit configured to extract a wind field passing through the center of the tropical cyclone using an azimuth Fourier analysis; and a steering flow calculation unit configured to calculate a straight flow by obtaining an inner product of wind vectors at the center from the throughflow extracted by the throughflow extraction unit and to calculate a steering flow by averaging the grid point data within a set radius.;COPYRIGHT KIPO 2020
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