基于大气辐射传输模型的地物偏振反射率反演方法
投稿时间:2018-01-03  修订日期:2018-02-07  点此下载全文
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作者单位E-mail
赵慧洁 北京航空航天大学 hjzhao@buaa.edu.cn 
邢健 北京航空航天大学  
贾国瑞 北京航空航天大学 248jgr@163.com 
中文摘要:目前偏振探测主要基于传感器入瞳偏振态,定性地增强感兴趣地物或抑制背景干扰。公开的地物偏振反射率反演方法仅有经验线性法,对多变观测条件的适应性、实时性方面存在不足。提出一种基于大气矢量辐射传输模型的地物偏振反射率反演方法。利用辐射传输模型,建立地表反射率、观测条件与传感器入瞳处辐亮度偏振态的查找表,再进行查找表反查及数值计算,完成偏振反射率反演。验证实验表明,典型地面目标物的偏振反射率反演精度可达到90%。
中文关键词:偏振反射率  反演  大气矢量辐射传输模型
 
Polarization reflectance retrieval method based on atmospheric radiative transfer model
Abstract:Current polarization detection is mainly based on the polarization state of at-sensor radiance, which can enhance objects of interest or restrain background disturbance qualitatively. There is only empirical linear method for polarized reflectance retrieval of ground objects, which is inadequate in terms of adaptability and real-time capability under varied observation conditions. A polarized reflectance retrieval method based on polarized atmospheric radiative transfer model is hereby proposed. A lookup table (LUT) is established by using the radiative transfer model to illustrate the relationship among polarized reflectance, observation condition and at-sensor polarization state. Polarized reflectance can then be retrieved using the LUT combined with numerical calculation. Results of the experiment show that retrieval accuracy of polarized reflectance of typical ground objects can be up to 90%.
keywords:Polarized reflectance  Retrieval  Atmospheric polarized radiative transfer model
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