地表双向反射对天基矢量辐射探测的影响分析  

Effect of surface reflectances on the space-based vector radiative detection

作　　者：程天海[1,2,3] 顾行发[1,3] 余涛[1,3] 陈良富[1,3] 田国良[1,3] 

机构地区：[1]中国科学院遥感应用研究所,遥感科学国家重点实验室,北京100101 [2]中国科学院研究生院,北京100049 [3]国家航天局航天遥感论证中心,北京100101

出　　处：《物理学报》2009年第10期7368-7375,共8页Acta Physica Sinica

基　　金：国家高技术研究发展计划(批准号:2006AA06A303);国家自然科学基金(批准号:40701109);中国科学院知识创新工程重要方向(批准号:KZCX2-YW-303)资助的课题~~

摘　　要：矢量辐射传输方程定量描述了辐射在地表-大气耦合介质中的传输过程,是定量遥感的基础.在处理辐射和离散介质相互作用时,如何处理多次散射、辐射偏振效应和耦合地表模型是研究的重点,直接影响定量化遥感反演的精度.文中基于逐次散射近似法求解了矢量辐射传输方程,求解过程中耦合典型地表的非偏双向反射(BRDF)模型和偏振双面反射(BPDF)模型.采用相对误差因子定量分析了地表双向反射效应和大气偏振效应对天基矢量辐射的影响.为进一步研究地表-大气耦合介质系统的偏振特性及地表大气参数的定量遥感反演提供理论支持.The propagation and redistribution of radiation in surface-atmosphere medium can be fully described by vector radiative transfer equation,which is the basis of quantitative remote sensing.How to deal with the questions of multiple-scattering effect,the polarization effect of the scattered radiation and the surface reflectance model is essential to an accurate simulation of vector radiative transfer equation,which affects the precision of quantitative remote sensing.This paper solves the vector equation of radiative transfer by using the successive orders of scattering approach; it includes the bidirectional reflectance distribution function （BRDF） model and bidirectional polarized reflectance distribution function （BPDF） model of surface reflectance. The index of relative errors was used to quantitatively study the effect induced by the difference of surface reflectance models and the polarization effect. Based on the studies, the basic theory of quantitative remote sensing using vector radiative transfer equation is proposed.

关 键 词：矢量辐射传输方程 逐次散射近似 定量遥感 偏振遥感 

分 类 号：TP701[自动化与计算机技术—检测技术与自动化装置] P208[自动化与计算机技术—控制科学与工程]