Abstract

In this paper, the scattering characteristics and the reflectivity factors of dual frequency radar at Ku and Ka band are simulated for precipitation in different phases states by the T-matrix method. By setting the gamma raindrop size distribution and the scattering direction of precipitation particles, the radar reflectivity of solid, liquid and mixed particles is obtained. The results show that the temperature has a almost negligible influence on ZeKu and DFR of liquid particles; the influence of the mixing ratio on ZeKu and DFR cannot be ignored for mixed particles; and the DFR with a mixed ratio of 0.2 has large difference from that with other mixing ratio values.

Keywords: Keywords: T-matrix; Phase state; Reflectivity factor; Dual frequency radar
Abbreviations: GPM: Global Precipitation Measurement; DPR: Dual-frequency Precipitation Radar; EBCM: Extended Boundary Condition Method; DFR: Dual-Frequency Ratio