Rainfall phase identification QPE algorithm based on X-band dual-polarization radar

• Main Authors: HAN ZHAOQUAN, DAI ZHUJUN, YU KUN, QUAN WANQING, LIU DONGQING, ZHU XINJUN, JIANG YOUSHAN, SHU YU, SUN ZHENGQI, LU HUABIAO
• Format: Patent
• Language: Chinese; English
• Published: 04.07.2023
• Subjects: ANALOGOUS ARRANGEMENTS USING OTHER WAVES; CALCULATING; COMPUTING; COUNTING; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; ELECTRIC DIGITAL DATA PROCESSING; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION ORRERADIATION OF RADIO WAVES; MEASURING; METEOROLOGY; PHYSICS; RADIO DIRECTION-FINDING; RADIO NAVIGATION; TESTING

The invention discloses a precipitation phase identification QPE algorithm based on an X-band dual-polarization radar, and the algorithm introduces an optimal precipitation intensity estimation algorithm (HCA-LIQ) based on phase identification on the basis of a dual-polarization QPE algorithm. Firstly, a phase state identification result of a radar scanning area is used as a parameter, precipitation phase state types are distinguished, and then optimal QPE calculation is carried out according to different types on the basis. According to the algorithm, QPE errors caused by rainfall types and related micro-physical processes are reduced, and the accuracy of QPE is improved. 本发明公开了一种基于X波段双偏振雷达的降水相态识别QPE算法，本发明在双偏振QPE算法基础上，引入基于相态识别的最优降水强度估测算法（HCA-LIQ）。首先利用雷达扫描区域的相态识别结果作为参量，区分降水相态类型，然后在此基础上依照不同类型分别进行最优化QPE计算。该算法减少了降水类型及相关微物理过程造成的QPE误差，提升了QPE的准确度。