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Net Surface Shortwave Radiation Retrieval Using Viirs Data

机译:利用Viirs数据反演净表面短波辐射

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The Net Surface Shortwave Radiation (NSSR) at the Earth's surface drives evapotranspiration, photosynthesis and other physical and biological processes. The primary objective of this study is to estimate NSSR using multispectral narrowband data of the National Polar-orbiting Operational Environmental Satellite System (NPOESS) Visible Infrared Imaging Radiometer Suite (VIIRS). A method to convert narrowband reflectance to broadband albedo at TOA with VIIRS data is developed and retrieval of NSSR from TOA broadband albedo is also carried out. Accurate radiative transfer model MODTRAN 5 was used to simulate these physical quantities, and the least squares method is applied to get coefficients. The RMSE of Narrowband-to-broadband albedo conversion results is 0.011. And the RMSE of between actual and simulated NSSR in clear sky condition is 50.2 W/m2.
机译:地球表面的净表面短波辐射(NSSR)驱动蒸散,光合作用以及其他物理和生物过程。这项研究的主要目的是使用国家极轨运行环境卫星系统(NPOESS)可见红外成像辐射计套件(VIIRS)的多光谱窄带数据估算NSSR。提出了一种利用VIIRS数据将TOA窄带反射率转换为宽带反照率的方法,并从TOA宽带反照率中提取了NSSR​​。使用精确的辐射传递模型MODTRAN 5来模拟这些物理量,并应用最小二乘法获得系数。窄带反照率转换结果的RMSE为0.011。在晴朗的天空条件下,实际和模拟NSSR之间的RMSE为50.2 W / m 2

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