摘要
卷云大气的红外辐射特性是空间光电探测系统的重要背景辐射源。基于2.7μm和4.3μm波段的卷云粒子散射特性参数,建立了卷云大气辐射传输模型。在MODIS实测卷云和大气参数条件下,仿真计算得到大气层顶的红外辐射图像。各像元辐亮度的统计结果显示:在2.7μm带的平均辐亮度为1.832e-2±3.024e-2 W/(m2·sr),卷云像元平均辐亮度比晴空像元强433倍;各像元在4.3μm带的平均辐亮度为3.027e-2±2.99e-3 W/(m2·sr),像元最大辐亮度是最小值的2.37倍。
Infrared radiance characteristic of cirrus atmosphere is the main clutter sources for advanced space-based electro-optical detecting systems.Based on bulk scattering parameters of cirrus particles in2.7μm and4.3μm wavebands,cirrus atmosphere radiance transfer model was constructed.With cirrus and atmosphere parameters measured by MODIS,the infrared radiation images of cirrus atmosphere were calculated.The statistical results of all pixels show that,in the 2.7μm band,the average radiance is1.832e-2±3.024e-2W/(m^2·sr),and the average radiance of cirrus pixels is433times larger than that of the clear-sky pixels;For4.3μm in-band radiance of all pixels,the average value is3.027e-2±2.99e-3W/(m^2·sr),the maximum value is2.37times as large as the minimum.
作者
戴聪明
赵凤美
刘栋
唐超礼
魏合理
Dai Congming;Zhao Fengmei;Liu Dong;Tang Chaoli;Wei Heli(Key Laboratory of Atmospheric Optics,Anhui Institute of Optics and Fine Mechanics,Chinese Academy of Sciences,Hefei 230031,China;Science Island Branch of Graduate School,University of Science and Technology of China,Hefei 230026,China)
出处
《红外与激光工程》
EI
CSCD
北大核心
2018年第12期151-157,共7页
Infrared and Laser Engineering
基金
国防基础科研计划(JCKY2016204C602)
装备预研项目(41416020204)
关键词
卷云
吸收带
红外辐射
晴空大气
MODIS
cirrus
absorption band
infrared radiance
clear-sky atmosphere
MODIS
