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Bréon(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.
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
