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
出处
《大气与环境光学学报》
CAS
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
