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《Acta Optica Sinica》 2017-08
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Automated Radiation Calibration Method Based on Dunhuang Radiometric Calibration Site

LüJiayan;He Mingyuan;Chen Lin;Hu Xiuqing;Li Xin;College of Meteorology and Oceanography,PLA University of Science and Technology;National Satellite Meteorological Center,China Meteorological Administration;Key Laboratory of Radiometric Calibration and Validation for Environmental Satellite,China Meteorological Administration;Anhui Institute of Optics and Fine Mechanics,Chinese Academy of Sciences;  
An automated radiation calibration method is proposed based on the automated multichannel spectral radiometer(ATR),6SV radiometric transfer model,historical hyperspectral reflectance model of Dunhuang site and moderate-resolution imaging spectroradiometer(MODIS)bidirectional reflectance distribution function(BRDF).The proposed method can be used for radiation calibration continuously when the weather and satellite observation geometry parameters satisfy the conditions.Experiments are carried out at Dunhuang radiometric calibration site from August 2015 to March 2016,and effective observation data in 17 days is obtained.AQUA/MODIS is used as radiation benchmark to verify the accuracy and calibration frequency.Results show that the radiometric calibration for a satellite remote sensor can be conducted per average 10-15 days.The reflectivity at top of the atmosphere obtained by the proposed method is compared with the observed data by each channel of AQUA/MODIS,and we find that the relative deviation is less than 5%,the mean relative deviation is less than 2%,and the standard deviation is less than 2%.
【Fund】: 国家自然科学基金(41675036 41475031 41471304 41590874);; 国家863计划(2015AA123704)
【CateGory Index】: V443.5
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