摘要
利用精确的红外大气辐射传输计算模型KCARTA,模拟计算了光谱分辨率、通道光谱响应函数、光谱定标精度、大气倾斜路径和表面发射率对高光谱观测亮温的影响.正演计算的结果表明:1)提高光谱分辨率明显增加了可探测的大气亮温;2)各种内、外部因素的变化对高光谱仪器将产生远较低光谱仪器更大的观测亮温差.本研究可为我国高光谱大气探测仪器的设计以及高光谱大气探测反演算法研究的开展提供科学的参考依据.
With a well-developed infrared radiation transfer model KCARTA, the effects of spectral resolution, spectral response function shape, spectral calibration accuracy, propagation path and surface emissivity on the detected brightness temperature for hyperspectral sounding were simulated. The results from forward simulation show ： 1 ） improvement of spectral resolution will increase detectable brightness temperature 2） any uncertainties from internal and external factors will lead up to much larger brightness temperature difference for hyperspectral sensor than for low spectral sensor. Results can be taken as the referrence in designing future hyperspectral IR sensors and in developing hyperspectral retrieval algorithm.
出处
《红外与毫米波学报》
SCIE
EI
CAS
CSCD
北大核心
2005年第6期414-418,共5页
Journal of Infrared and Millimeter Waves
基金
国防科工委2002民用航天预先研究项目(GFY3-高光谱-2002)资助项目
关键词
卫星
红外
高光谱
大气探测
正演模拟
satellite
infrared
hyperspectral
atmospheric sounding
forward simulation
