Abstract:
In order to studying on precipitation monitoring and microphysical processes in thunderstorm clouds based on the 714XDP-A X-band dual-polarization radar,the quality control method and the hydrometeors’ identification method are discussed. A more systematic comparison and discussion were carried out,and the following conclusions were drawn: (1)The continuity of differential propagation phase shift(φDP) is been significantly improved for the follow-up work by using the method of checking the differential propagation phase shift’s continuity and folding phase back. In the filtering method,the wavelet filter is better than moving average filter and median filter. In addition,the difference between the reflectivity factor and the S-band radar is reduced by using the self-consistent method with constraints for attenuation correction. (2)Based on the fuzzy logic algorithm,four kinds of polarized parameters after quality control method are used to identify the 10 types of hydrometeors in the thunderstorm cell,which are drizzle rain(DR),rain(RA),dry snow(DS),dry crystal(DC),wet snow(WS),dry graupel(DG),wet graupel(WG),small hail(SH),large hail(LH),rain and hail(RH). After analysis,the distribution of hydrometeors is quite reasonable by using environment temperature. After the above study,a complete quality control and hydrometeors’ identification method based on the folding back,wavelet denoising,self-consistent method with constraints and the fuzzy logic algorithm constraint by environment temperature is established.