摘要
给出非均匀分层、各层各异非球形粒子随机介质在脉冲波入射下矢量辐射传输方程(VRT)的Mueller矩阵解 ,数值模拟了极化后向散射。极化脉冲回波强度的时滞方式及其时间上的变化能表明体散射和面散射机制 ,它描绘了随机散射粒子层的非均匀分布。由此 ,讨论了植被层有效高度的确定 。
The Mueller matrix solution of vector radiative transfer for inhomogeneous random media of non spherical scatterers under a pulse incidence is presented. Co polarized and cross polarized bistatic scattering echoes can be numerically simulated. Temporally varying echoes well demonstrate volumetric and surface scattering mechanism and depict the inhomogeneous fraction profile of random scatterers. The effective height of inhomogeneous canopy inverted from the pulse echoes is discussed. Pulse echo patterns are also numerically simulated for polarimetric scattering from the model of random metal targets beneath the layered vegetation canopies.
出处
《北京大学学报（自然科学版）》
CAS
CSCD
北大核心
2003年第z1期143-150,共8页
Acta Scientiarum Naturalium Universitatis Pekinensis
基金
国家自然科学基金 ( 6 0 1710 0 9)
国家重点基础研究规划( 2 0 0 1CB30 94 0 1)资助项目
关键词
植被覆盖
异常散射体
全极化散射
时间相关MueUer矩阵
脉冲入射波
inhomogeneous vegetation canopy
effective canopy height
anomalous metal targets
temporal Mueller matrix
polarimetric scattering
pulse echo pattern
