晴空地表反照率正则化反演算法的POLDER多角度数据验证

大气与环境光学学报 ›› 2011, Vol. 6 ›› Issue (3): 215-223.

晴空地表反照率正则化反演算法的POLDER多角度数据验证

崔生成1，杨世植1，赵强1，王家成1,2，王震1，王艳梅1

（1中国科学院安徽光学精密机械研究所中国科学院通用光学定标与表征技术重点实验室，安徽合肥 230031;
2阜阳师范学院物理与电子科学学院，安徽阜阳 236041）

收稿日期:2010-04-27 修回日期:2010-09-07 出版日期:2011-05-28 发布日期:2011-05-23
通讯作者: 崔生成（1980-），男，安徽桐城人，博士研究生，主要从事定量化遥感分析与应用的研究。 E-mail:shchcui@126.com
作者简介:崔生成（1980-），男，安徽桐城人，博士研究生，主要从事定量化遥感分析与应用的研究。
基金资助:
国家自然科学基金（41005016）、中科院信息化项目（INFO-115-C01-SDB4-27）资助

Validation of Regularized Retrieval Algorithm for Clear-Sky Land Surface Albedo with Multi-Angular POLDER Data

CUI Sheng-cheng1, YANG Shi-zhi1, ZHAO Qiang1, WANG Jia-cheng1,2, WANG Zhen1, WANG Yan-mei1

(1 Key Laboratory of Optical Calibration and Characterization, Anhui Institute of Optics and Fine Mechanics, Chinese Academy of Sciences, Hefei 230031, China;
2 College of Physics and Electronic Information, Fuyang Teachers College, Fuyang 236041, China )

Received:2010-04-27 Revised:2010-09-07 Published:2011-05-28 Online:2011-05-23

摘要/Abstract

摘要：

使用偏差原则和正则化方法反演晴空地表双向反射分布函数BRDF、方向-半球反射率DHR和双半球反射率BHR。利用6S辐射传输模型计算出天空散射光，并以此为权重将DHR和BHR进行线性组合得到地物光谱反照率。最后，通过窄波段反照率向宽波段转换，计算了0.25~2.5 μm的短波反照率。使用POLDER-3/PARASOL多角度数据进行验证，并将所得结果与MODIS AMBRALS算法进行比较。结果表明该算法和MODIS反演算法精度相当。

关键词: 偏差原则, 正则化, 反照率, 反演

Abstract:

Based on discrepancy principle and regularization techniques, a regularizing inversion method is employed for the retrieval of clear-sky land surface bidirectional reflectance distribution function (BRDF), directional-hemispherical reflectance (DHR) and bi-hemispherical reflectance (BHR). The fraction of diffuse skylight is computed by using the 6S radiative transfer code. Therefore, by interpolating between DHR and BHR, the actual instantaneous spectral albedos can be computed. Accordingly, the calculation of shortwave (0.25~2.5μm) albedos can be implemented by the conversion of narrowband spectral albedos to broadband albedos. Validation of the presented algorithm is implemented with the POLDER-3/PARASOL BRDF data sets. Comparison of results retrieved by the presented algorithm with that by MODIS AMBRALS algorithm indicates that the accuracy of regularizing retrieval algorithm is equivalent to that of the MODIS algorithm.

Key words: discrepancy principle, regularization, albedo, retrieval

中图分类号:

TP79
P407.8

崔生成杨世植赵强王家成王震王艳梅. 晴空地表反照率正则化反演算法的POLDER多角度数据验证[J]. 大气与环境光学学报, 2011, 6(3): 215-223.

CUI Sheng-Cheng, YANG Shi-Zhi, ZHAO Qiang, WANG Jia-Cheng, WANG Zhen, WANG Yan-Mei. Validation of Regularized Retrieval Algorithm for Clear-Sky Land Surface Albedo with Multi-Angular POLDER Data[J]. Journal of Atmospheric and Environmental Optics, 2011, 6(3): 215-223.

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