氧气吸收通道的高光谱传感器在轨光谱定标  

In-flight Spectral Calibration of Oxygen Absorption Channels of Hyperspectral Sensor

作　　者：高海亮[1] 顾行发(指导)[1] 余涛[1] 谢勇[1] 孙源[1] 郑逢杰[1] 

机构地区：[1]中国科学院遥感与数字地球研究所,遥感科学国家重点实验室,北京100101

出　　处：《光子学报》2014年第10期58-65,共8页Acta Photonica Sinica

基　　金：国家自然科学基金青年科学基金(No.41201344);中国科学院遥感应用研究所知识创新工程青年人才领域前沿项目(No.Y1S01800CX);中科院遥感与数字地球研究所自主研发项目(No.Y3SZ380030)资助

摘　　要：通过对760nm氧气吸收特征的分析,构建波段半高宽分别为15、10、5和2.5nm的高光谱传感器模型,提出了四种光谱匹配类型和六种光谱匹配算法.基于MODTRAN辐射传输模型模拟出包含光谱偏移信息的测量光谱与参考光谱,计算出不同匹配类型和匹配算法的在轨光谱定标精度.结果表明,采用测量表观辐亮度和参考表观辐亮度作为光谱匹配类型,以相关系数作为光谱匹配算法的光谱定标精度最高.The Oxygen absorption characteristic was analyzed and four hyperspectral sensor models were built with full width at half maximum of 15,10,5and 2.5nm.Four spectral matching styles and six spectral matching algorithms were proposed.The measured spectrum and referenced spectrum with spectral offset were simulated based on MODTRAN radiative transfer model.The spectral calibrations of hyperspectral sensor with different FWHMs were processed using four spectral matching styles and six spectral matching algorithms. Then the in-flight spectral calibration accuracy was analyzed quantitatively.The results show that the spectral calibration based on correlative coefficient of measured apparent radiance and referenced apparent radiance has the highest accuracy.

关 键 词：光谱定标 氧气吸收 光谱匹配 高光谱遥感 光谱偏移 

分 类 号：TP722.4[自动化与计算机技术—检测技术与自动化装置]