| 基于MODIS红外通道的辐射传输计算 |
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| 引用本文： | 赵强,杨世植,乔延利,崔生成,王震,李启朗. 基于MODIS红外通道的辐射传输计算[J]. 红外与激光工程, 2009, 38(2) |
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| 作者姓名： | 赵强 杨世植 乔延利 崔生成 王震 李启朗 |
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| 作者单位： | 中国科学院安徽光学精密机械研究所,安徽合肥,230031;安徽建筑工业学院数理系,安徽合肥,230601 |
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| 摘 要： | 通过建立地气系统的红外辐射传输方程,基于MODIS红外通道进行辐射传输计算.利用快速精确的透过率模型PFAAST计算大气透过率,在红外辐射传输计算中考虑了地面反射大气辐射亮度的影响,指出地面反射大气辐射亮度在整个方程所占比重随着地表发射率变小而增加,其中MODIS第33通道对发射率的改变最为敏感,美国标准大气下,当发射率ε=0.65时,比重达到7.12%,因此,忽略地面反射大气辐射亮度,直接影响红外辐射传输计算的准确性.模拟了MODIS各红外通道辐射亮度,并与MODTRAN4.0模拟结果比较,相对误差不超过0.12%,模拟了大气倾斜路径对卫星红外通道观测亮温的影响.
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| 关 键 词： | 红外 辐射传榆 透过率 MODIS 辐射亮度 |
Computation of radiative transfer model based on MODIS infrared channel |
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| ZHAO Qiang,YANG Shi-zhi,QIAO Yan-li,CUI Sheng-cheng,WANG Zhen,LI Qi-lang. Computation of radiative transfer model based on MODIS infrared channel[J]. Infrared and Laser Engineering, 2009, 38(2) |
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| Authors: | ZHAO Qiang YANG Shi-zhi QIAO Yan-li CUI Sheng-cheng WANG Zhen LI Qi-lang |
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| Affiliation: | 1.Remote Sensing Laboratory;Anhui Institute of Optics and Fine Mechanics;Chinese Academy of Sciences;Hefei 230031;China;2.Department of Mathematics & Physics;Anhui University of Architecture;Hefei 230601;China |
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| Abstract: | The infrared radiative transfer equation of earth-atmosphere system was established,and the radiative transfer model based on MODIS infrared channel was computed.The atmosphere transmittance was calculated fast by accurate PFAAST model,the effect of ground reflected atmospheric emission radiance was considered in the radiative transfer calculation,it was showed that the percentage of ground reflected atmospheric emissive radiance in radiative transfer equation increased while the surface emissivity reduced,... |
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| Keywords: | MODIS |
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