An improved wavelet thresholding method is applied to denoise weather radar raw data. It used an adjustable
thresholding method other than soft or hard thresholding methods. Comparing with median filtering method, the result of
this method shows that it can remove the noise from the data and keep the useful infomation well at the same time. It can
improve the detection rate and lower the false alarm rate for small scale sever storm. The radar echo maps are also made
clearer.
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