Quality control algorithm of S-band weather radar in Liaoning province based on three heavy precipitation processes
In this paper,a quality control algorithm of S-band dual polarization weather radar is proposed in order to solve the data quality problem of S-band weather radar in Liaoning province.The algorithm included five parts:initial azimuth consistency revision,non-standard blockage revision,ground clutter recognition,threshold control and clutter elimination.Based on the S-band dual polarization weather radar data under different weather processes in Yingkou region,the distribution characteristics of reflectivity level texture,correlation coefficient variance,dif-ferential reflectivity variance and differential propagation phase shift variance corresponding to feature clutter in Li-aoning area were statistically characterized,the localization parameters corresponding to the fuzzy logic clutter rec-ognition algorithm are established.The quality control algorithm was verified by using the radar base data during three severe convective weather events(August 19,2021;June 9,2019;June 25,2022)in Liaoning province.The results show that the algorithm has less loss of meteorological echoes.It can improve the quality of S-band radar data,effectively revise the non-standard obscuration during the weather process,eliminate the non-meteorological echoes such as ground clutter and electromagnetic interference.The study can provide a reference for the monito-ring of the S-band dual-polarization radar quality control technique in the strong convective weather.
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