机载相控阵天气雷达回波仿真与分析  

Simulation and Analysis of Airborne Phase Array Weather Radar Reflectivity

作　　者：王磊 于超鹏[2] 刘平[3] 无 

机构地区：[1]四川省气象探测数据中心,成都610072 [2]中国航空工业集团公司雷华电子技术研究所,无锡214063 [3]四川省气象局四川省人工影响天气办公室,成都610072 [4]高原与盆地暴雨旱涝灾害四川省重点实验室,成都610072

出　　处：《系统仿真学报》2016年第8期1869-1877,共9页Journal of System Simulation

基　　金：国家973计划(2013CB430102);航空科学基金(201320R2001);中国气象局2015年关键技术项目(CMAGJ2015M51);江苏省普通高校研究生科研创新计划项目(KYLX15_0890)

摘　　要：分析了天线增益、波束宽度、脉冲宽度及衰减等因素对雷达气象方程的影响。选取新一代天气雷达(CINRAD/SA)的反射率因子,结合订正后的雷达气象方程和飞行观测参数,仿真模拟机载相控阵天气雷达水平扇扫和垂直扇扫的反射率因子。对比分析表明:在径向上,采用脉冲压缩技术的机载相控阵雷达的距离分辨率要高于新一代天气雷达;在切向上,由于天线增益及波束宽度随指向角的变化,导致机载相控阵雷达数据平滑效果明显,探测精度低于新一代天气雷达。采用回波衰减订正法后,机载相控阵天气雷达反射率因子可信度较高,有助于为飞行员提供更为准确的危险天气预警。The relation between radar parameters such as radar gain, beam width and impulse width and radar reflectivity based on the parameters of airborne phase array weather radar at X-band were proposed. Combined with weather radar equation correction and flight parameters, horizontal sector scanning and vertical sector scanning reflectivity data of airborne phased array weather radar were simulated based on new generation weather radar （CINRAD/SA） reflectivity. The results show that along the radial direction, the distance resolution of airborne phase array radar used impulse compress technology is higher than new generation weather radar and along the shear direction, because antenna gain and beam width changing with the elevation, the smooth effect of the phase array radar data is obvious and its sounding accuracy is lower than new generation weather radar On the other hand, after adopting the echo attenuation correction method, the credibility of airborne phased array weather radar reflectivity is higher, which provides more accurate dangerous weather warning for the pilots.

关 键 词：机载相控阵雷达 权重插值 仿真算法 脉冲压缩 回波衰减 

分 类 号：P415.2[天文地球—大气科学及气象学]