窄波束C波段双偏振多普勒天气雷达及其探测能力分析  

The Narrow Beam C-Band Dual-Polarization Doppler Weather Radar of NUIST and Its Performance Analysis

作　　者：楚志刚[1] 胡汉峰[1] 黄兴友[1] 魏鸣[1] 

机构地区：[1]南京信息工程大学气象灾害预报预警与评估协同创新中心/中国气象局气溶胶与云降水重点开放实验室,南京210044

出　　处：《高原气象》2017年第4期1072-1081,共10页Plateau Meteorology

基　　金：公益性行业(气象)科研专项(GYHY201306078);国家重点基础研究发展计划(973)项目(2013CB430100);中国气象局气溶胶与云降水重点开放实验室开放基金项目(KDW1605);江苏省高校优势学科建设工程资助项目(PAPD)

摘　　要：为了评估南京信息工程大学窄波束C波段双偏振多普勒天气雷达的观测性能和应用潜力,对雷达的高分辨率回波数据进行了分析,利用固定地物订正了径向定位误差,以及在线太阳信号修正了差分反射率因子(Z_(DR))偏差;通过对流降水和层状云降水回波分析,发现了共振散射效应、不同降水粒子的回波特征、非均匀波束填充(NUBF或NBF)现象、降水倾斜结构和可能存在过冷水的证据。A dual-polarization Doppler Weather radar with narrowbeam of C-band was installed at Nanjing University of Information Science Technology. To verify its observational capability and potential applications,high-resolution radar data were comprehensively analyzed. The radial positioning bias was adjusted based on the echoes of the stationary references. Moreover,the differential reflectivity（ Z_（DR）） bias was calibrated by the online solar signals. Also,the radar data retrieved from both convective and stratiform precipitation were performed.The results showed that the resonance scattering effect,various precipitation particle information,and non-uniform beam filling（ NUBF or NBF） existed. Besides,tilt precipitation structure and possible supercooled water evidences were revealed.

关 键 词：双偏振天气雷达 窄波束 共振散射 过冷水 非均匀波束填充 

分 类 号：P414[天文地球—大气科学及气象学]