Study on Differences and Fusion Mosaic Methods of Parameters Between S-Band and X-Band Weather Radars
With the increasing number of X-band dual-polarization radar networks,making network obser-vation of X-band dual-polarization radars and S-band dual-polarization radars has become more necessary.Based on the observation data of the severe convective weather in Beijing on 27 July 2021,the consistency of polarization parameters between the X-band radar network and S-band dual-polarization radar is quanti-tatively analyzed.The results indicate that Beijing X-band radar networks and S-band dual-polarization radar have a favorable consistency on reflectivity factor(Z),and the differences of differential reflectivity(ZDR)are concentrated near 0 dB,specific differential phase(KDP)has significant difference in the area where Z≥30 dBz.Based on the characteristics of the observed polarization parameter differences,two fu-sion mosaic methods of parameters are compared:one is direct fusion mosaic and the other is distance-weighted with an exponent.By analyzing vertical cross-section(VCS)of polarization parameters,we see that the blind area of radars could be made up for each other,and KDP can have a more natural transition through the fusion mosaic method distance-weighted with an exponent.The fusion effect could provide some references for different band radars needing fusion mosaic.
万方数据
维普
