A Study On The Algorithms For Making Attenuation Correction To Observations Of Weather Radar Reflectivity Factor And Their Applications

In this paper, the theory for attenuation correction has been studied and advantages and disadvantages of several algorithms for applications have been analyzed. Further more, some of them have been applied on real data. The results show that these algorithms for attenuation correction can work well in the valid range and their effects on attenuation correction are almost identical. When attenuation is strong or measurement error of real echo is large, however, the result from the H-B algorithm for attenuation correction is not good. The attenuation correction coefficient influences correction quantity and correctable thickness. The greater the coefficient is, the greater the correction quantity and the thinner the correctable thickness.In order to analyze and compare the combining sounding data of dual-weather radars, the predetermined co-plane technique is used. Namely, the volumetric-scan data of two weather radars are applied after they are projected onto a predetermined co-plane by an interpolation .To some extent, the technique settles the difficulty that the time and the space are not accordant by using two weather radars in volumetric-scan. In addition, this paper provides the co-plane display of the volumetric-scan data of two weather radars. In a result, time -space accordance effect and attenuation correction effect for data of two weather radars can be viewed directly.