红外高光谱探测CO_2柱总量的敏感性分析  

CO_2 Column Sounding Sensitivity Analysis by IR Hyperspectroscopy

作　　者：徐菲菲[1,2] 胡勇[1] 尹球[3] 巩彩兰[1] 祝令亚[4] 赫华颖 

机构地区：[1]中国科学院上海技术物理研究所,上海200083 [2]中国科学院大学,北京100049 [3]上海市卫星遥感与测量应用中心,上海201199 [4]中国资源卫星应用中心,北京100094

出　　处：《大气与环境光学学报》2013年第6期440-447,共8页Journal of Atmospheric and Environmental Optics

基　　金：公益性行业(气象)科研专项(GYHY201106045-3);民用航天"十二五"预先研究项目(D040103)资助

摘　　要：利用辐射传输模型MODTRAN5模拟计算了红外高光谱仪在光谱分辨率、光谱定标精度、地面反射率、大气廓线以及辐射分辨率对CO_2气体含量探测敏感性的影响,同时定义探测辐亮度随气体含量改变的变化量指标S值,并对探测灵敏度、光谱分辨率和信噪比SNR的关系进行了综合分析。为我国红外高光谱大气探测仪的设计以及高光谱大气成分反演研究的开展提供重要的科学依据。对CO_2柱总量反演通道的选择和实现CO_2气体探测敏感参数分析具有重要的参考价值。The effects of spectral resolution, spectral calibration accuracy, surface reflectance, atmospheric profile, and radiation resolution on the CO2 column the infrared radiation transfer model MODTRAN5 sensitivity for hyperspectral sounding were simulated by In the meantime, sounding radiance variation index S changing with the gas content was defined. And the relationship of sounding sensitivity, spectral resolution, and signal-to-noise ratio （SNR） were comprehensively analyzed. Results can be taken as the reference for designing future hyperspectral IR sensors and developing hyperspectral retrieval algorithm. The results can provide an important reference for channel selection about CO2 column inversion and analysis about CO2 sounding sensitivity parameter

关 键 词：辐射传输模型 MODTRAN5 高光谱探测 探测灵敏度 CO_2 

分 类 号：P414[天文地球—大气科学及气象学]