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Sensitivity Analysis of Single-Angle Polarization Reflectance Observed by Satellite

ISSN号：0023-074X
期刊名称：Chinese Science Bulletin
时间：0
页码：-
分类：TN248.22[电子电信—物理电子学] P642.22[天文地球—工程地质学;天文地球—地质矿产勘探;天文地球—地质学]
作者机构：[1]Department of Atmospheric and Oceanic Sciences, School ofPhysics, Peking University, Beijing 100871, China, [2]Department of Geological Sciences, Jackson School ofGeosciences, University of Texas at Austin, Austin, TX 78712,USA
相关基金：Acknowledgments The study was supported by the Strategic Priority Research Program of the Chinese Academy of Sciences （XDA05040000）, the National High Technology Research and Development Program of China （SQ2010AA1221583001）, and the National Natural Science Foundation of China （40775002, 41175020 and 41375008）.
相关项目：新一代极轨和静止卫星大气气溶胶光学特性遥感方法研究

关键词：敏感性分析, 偏振反射, 卫星观测, 地球大气系统, 气溶胶粒子, 复数折射率, TOA, 观测卫星, Sensitivity analysis , Satellite , Single-angle polarimetric measurements , TanSat , CAPI

中文摘要：

Two channels of the Cloud Aerosol Polarimetric Imager,onboard the TanSat-Chinese carbon dioxide observation satellite,are designed to detect the polarization state of radiation reflected by the earth-atmosphere system in a single-viewing angle.Aiming to understand how the earth and atmospheric parameters affect the polarization state of radiation,we conduct a sensitivity analysis of the polarized reflectance at the top of atmosphere(TOA)with respect to the aerosol microphysical parameters,atmospheric profiles,and surface polarization properties.It is found that(1)the TOA polarization reflectance at 0.66 lm is most sensitive to the real part of the aerosol complex refractive index,the mean radius of the fine mode aerosol particles,as well as atmospheric pressure and temperature profiles;(2)the TOA polarization reflectance at 1.64 lm is sensitive to the volume ratio between the coarse mode and fine mode particles as well,but it is not sensitive to atmospheric profiles;and(3)surface polarization properties have a relatively weak influence on the TOA polarization reflectance at both 0.66 and 1.64 lm.

英文摘要：

Two channels of the Cloud Aerosol Polarimetric Imager, onboard the TanSat-Chinese carbon dioxide observation satellite, are designed to detect the polarization state of radiation reflected by the earth-atmosphere system in a single-viewing angle. Aiming to understand how the earth and atmospheric parameters affect the polarization state of radiation, we conduct a sensitivity analysis of the polarized reflectance at the top of atmosphere （TOA） with respect to the aerosol microphysical parameters, atmo- spheric profiles, and surface polarization properties. It is found that （1） the TOA polarization reflectance at 0.66 μm is most sensitive to the real part of the aerosol complex refractive index, the mean radius of the fine mode aerosol particles, as well as atmospheric pressure and temperature profiles; （2） the TOA polarization reflectance at 1.64 μm is sensitive to the volume ratio between the coarse mode and fine mode particles as well, but it is not sensitive to atmospheric profiles; and （3） surface polarization properties have a relatively weak influence on the TOA polarization reflectance at both 0.66 and 1.64 μm.

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