不均匀性束内充塞效应对星载测雨雷达反演算法的影响  

Impacts of Nonuniform Beam Filling on Spaceborne Rain Radar Algorithms

作　　者：窦贤康[1] 刘万栓[1] P.Amayenc 刘锦丽[3] 

机构地区：[1]中国科学技术大学地球和空间科学系,合肥230026 [2]Centre d'etude des Environnements Terrestre et Planetaires [3]中国科学院大气物理研究所,北京100029

出　　处：《大气科学》2000年第4期568-576,共9页Chinese Journal of Atmospheric Sciences

基　　金：国家自然科学基金资助项目!4 970 50 58

摘　　要：星载雷达在地面的足印可达数公里 ,强降雨团的特征尺度也仅为几公里 ,加上波束内各部分对回波的贡献是非线性的 ,研究不均匀性束内充塞效应 (NonUniformBeamFilling ,或简称NUBF)对星载测雨雷达反演雨强算法的影响就显得非常重要。利用TO GA/COARE期间Ku波段机载雷达实测资料提供的不同的降雨结构进行不均匀性束内充塞效应的研究。The radars without beam width do not exist in the reality. The spaceborne radar has the following features: its flight height is several hundred kilometers, the size of antenna is difficult to be made large enough, so the footprint of the radar can reach several kilometers, e.g. TRMM radar with a footprint of about 4 km. But the characteristic dimension of real raincell is also about several kilometers. Moreover, the contributions of the element volumes within the total pulse volume to the mean echo are not linear, so it is very important to study the nonuniform beam filling effect on the rainfall rate retrieval. This paper is to study this effect on the different rain structures deduced from the airborne Ku band radar data gathered during a TOGA/COARE experiment.

关 键 词：不均匀性束内充塞效应 雨强 测雨雷达 

分 类 号：TN959.4[电子电信—信号与信息处理]