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基于航空多角度偏振辐射计遥感数据评估陆地表面偏振反射模型 被引量:7

Evaluation of Land Surface Polarization Models Based on Airborne Advanced Atmosphere Multi-Angle Polarization Radiometer Measurements
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摘要 运用新研制的大气多角度偏振辐射计(AMPR)获得航空遥感数据并结合实验室测量数据对常用的三种地表偏振模型进行评估,分析地表偏振反射率的波段响应和角度响应特征。实验发现偏振反射率对波段变化的响应很小,该结论得到85%以上飞行数据的气溶胶反演结果支持。实验室数据中,波长变化1nm的黄棕壤和红沙土的偏振反射率改变量仅分别为2.43×10^-6和1.47×10^-6。在角度响应特征上,三种模型都与实验数据符合得很好,高植被覆盖率时三种模型与实际测量数据的偏差较小。分别对三种模型的航空数据进行拟合,Nadal和Breon(NB)开发的地表偏振反射率模型与飞行数据符合得最好,拟合偏差约是其他两个模型的一半,NB模型能够更精确地描述地表偏振反射的特性。 Three models of land surface polarized reflectance are evaluated using data obtained from newly developed advanced atmosphere multi-angle polarization radiometer (AMPR) and laboratory. The spectral and angular responses are analyzed. It is found that the spectral response is very little, and 85 % of AMPR aerosol retrievals support the result. For the data from laboratory, the changes of polarized reflectance of yellow brown soil and red sandy soil are just 2.43 ×10-6 and 1.47 × 10^-6 as the wavelength changes 1 nm. Angular responses of all three models match the measured data well with less difference between the high vegetation coverage data and models. After fitted, the model developed by Nadal and Brfion (NB) agrees with the measurements best, and the difference is about 1/2 of the other two models. NB model can describe the surface polarization more exactly.
作者 王涵 孙晓兵 孙斌 洪津 Wang Han1'2 Sun XiaobingI Sun Bin1'2 Hong Jin1 Kay Laboratory of Optical Calibration and Characterization, Anhui Institute of Optics and Fine Mechanics, Chinese Academy of Sciences, Hefei, Anhui 230031, China 2 University of Chinese Academy of Sciences, Beijing 100049, China
出处 《光学学报》 EI CAS CSCD 北大核心 2014年第1期244-251,共8页 Acta Optica Sinica
基金 国家大科学工程航空遥感系统、中国科学院重点资助项目(KGFZD-125-13-006)
关键词 遥感 大气多角度偏振辐射计 航空测量 地表偏振反射率 remote sensing atmosphere multi-angle polarization radiometer~ airborne measurement~ land surfacepolarized reflectance
作者简介 王涵(1986-),男,博士研究生,主要从事偏振遥感方面的研究。E-mail:ms.h.wang@163.com 导师简介:孙晓兵(1966),男,博士,研究员,主要从事偏振遥感方面的研究。E-mail:xbsun@aiom.ac.cn
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