摘要
针对传统热带降雨测量(TRMM)雷达的局限性,重点研究了新一代降雨雷达增设K和Ka波段测量的特点,从理论仿真的角度,对复杂降雨粒子模型在K和Ka波段的散射特性进行了仿真研究,稀疏矩阵规则网格方法用来加速矩阵矢量乘。对比分析了球形近似降雨粒子群在空间均匀分布的散射特性。针对实际降雨过程降雨粒子空间分布的随机性,详细分析了其电磁散射特性。还对随机方位分布和随机大小的降雨粒子群模型的散射特性进行了扫频分析,为新一代的星载天气雷达测量系统的研究提供了理论依据。
Aiming at the limitation of the traditional tropical rainfall measuring mission（TRMM）Radar,we focus on the next generation precipitation radar system including the Ka-band measurement.In this paper,the scattering characteristics from complex precipitation particles in the K or Ka-band are analyzed by using the sparse-matrix/canonical grid（SMCG） method.We analyze the electromagnetic scattering characteristics of uniformly and randomly distributed rainfall particles model in the Ka-band.Finally,we give the wide-band scattering properties of rainfall particles with arbitrary shape randomly distributed in a certain region.Numerical results are given to supply theory foundation for the development of the next generation precipitation radar.
出处
《电波科学学报》
EI
CSCD
北大核心
2012年第1期30-36,44,共8页
Chinese Journal of Radio Science
基金
江苏省自然科学基金(No.BK2009387)
空间微波技术重点实验室基金资助(No.9140C5306010903)
南京理工大学自主科研专项(2010ZYTS026)
关键词
降雨模型
电磁散射
稀疏矩阵规则网格方法
rainfall model
electromagnetic scattering
sparse-matrix/canonical grid method
