Method for prewarning Doppler radar remote sensing strong storm
A technology for strong storms and storms, applied in weather forecasting, measuring devices, meteorology, etc., it can solve problems such as difficulty in early warning and drastic changes in echoes, and achieve the effect of eliminating false mergers and solving splitting and merging problems.
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[0022] Such as figure 1 The realization steps of the strong storm early warning method of the present invention are as follows:
[0023] 1. Data preprocessing. First of all, quality control is carried out to remove radar base data with serious quality problems. Then the basic data in the polar coordinate system are interpolated to the three-dimensional geographic coordinates by using the nearest neighbor method in the radial direction and the azimuth and the vertical linear interpolation method.
[0024] 2. Identification of severe storms. The main steps are as follows:
[0025] 1) Use the first level threshold T z,min , using 3D clustering for storm identification.
[0026] 2) Perform an erosion operation on the 3D storm identified in step 1) to eliminate the weak connection between adjacent storms, thereby solving the problem of false merging.
[0027] 3) Use the threshold T in sequence z,1 =T z,min +(i-1)×5dBZ, i=2…N thresh , identify the storm, and perform erosion...
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