Typhoon Location in Landing Period Based on ThreeDimensional Mosaics of Reflectivity
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Abstract:
According to the symmetrical characteristic of reflectivity factor, a simple methodcorrelation method is developed based on the reflectivity data from the radar network, which can locate the typhoon eye in the landing period with a high temporal resolution. Two cases, HAGUPIT and GONI, are chosen to examine the proposed algorithm. The results show that the method is better with the absolute error within 15 km compared with that of the Central Meteorological Office of CMA. Another method using radial velocity to locate the center of a typhoon is compared with this method. The advantages and disadvantages between the radial velocity method and the methodcorrelation method are analyzed: the former is restricted by the observing range and the processing of velocity aliasing; the later was restricted by the integrity of echo structure around the eye of a typhoon, but it can avoid dealing with the velocity aliasing. Considering various problems, it is better to use the way of humanmachine interaction to locate the center of a typhoon.
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Supported by:Beijing E-Tiller Technology Development Co., Ltd.
Supported by:Beijing E-Tiller Technology Development Co., Ltd.