Long-Term Consistent Recalibration of VIRR Solar Reflectance Data Record for Fengyun Polar-Orbiting Satellites

作     者：Ling SUN Hong QIU Ronghua WU Jing WANG Liyang ZHANG Peng ZHANG Ling SUN;Hong QIU;Ronghua WU;Jing WANG;Liyang ZHANG;Peng ZHANG

作者机构：National Satellite Meteorological CenterChina Meteorological AdministrationBeijing 100081 

出 版 物：《Journal of Meteorological Research》 (气象学报（英文版）)

年 卷 期：2021年第35卷第6期

页      面：926-942页

核心收录：

学科分类：07[理学] 070601[理学-气象学] 08[工学] 0706[理学-大气科学] 082503[工学-航空宇航制造工程] 0825[工学-航空宇航科学与技术] 

基　　金：Supported by the National Key Research and Development Program of China(2018YFB0504905 and 2018YFB0504900) 

主　　题：FY-1 FY-3 visible infrared radiometer(VIRR) reflective solar bands pseudo-invariant calibration sites(PICS) calibration directional model(DM) spectral band adjustment factor(SBAF) 

摘      要：The visible infrared radiometer(VIRR)is the first instrument with longest measurements equipped on the Fengyun(FY)polar-orbiting *** re-processing of the historic VIRR measurements,long-term(over 20 yr)global data can be integrated from multiple participating VIRRs on a consistent radiometric scale,which are valuable to climate and climate change *** to lack of an onboard calibration system for VIRR,the reflective solar bands must be vicariously *** study applied the multi-site vicarious approach for consistent calibration of the VIRR visible(VIS)and near-infrared(NIR)data,and produced calibration coefficients for five VIRRs on FY-1 C/D and FY-3 A/B/*** data quality was then evaluated with *** reflectance predicted by using the radiative transfer model over multiple invariant desert and ocean targets was used to derive the calibration slope via a weighted fitting scheme,in which the weights are the inverse of the variance from a radiative transfer simulation evaluated with reference to Aqua moderate resolution imaging spectroradiometer(MODIS).The sensor-specific calibration coefficients were derived on a daily basis by using piecewise *** calibration reference of the VIRR solar band record was further traced to the Aqua MODIS Collection 6.1 reference calibration with a systematic correction derived from the Libya4 *** VIRR record was compared with the Aqua MODIS C6.1 calibration over the polar region based on simultaneous nadir overpass *** lifetime relative difference for each sensor are within 3.3%and 4.5%for channels 1 and *** deserts were also employed to evaluate the stability and consistency of the VIRR *** general,the means of the directional and spectral corrected reflectance for each sensor are within 1%of the 20-yr average,implying that the VIRR reflectance of the invariant targets is consistent to within 1%among the sensors for channels 1 and *** VIRR data th