Simulations of GaoFen-5 Directional Polarimetric Camera(DPC) Observations Using the Advanced Vector Discrete Ordinate Radiative Transfer Model  

作　　者：Yuchen XIE Ziqiang ZHU Fuzhong WENG Zhengqiang LI Xiuzhen HAN 

机构地区：[1]School of Remote Sensing&Geomatics Engineering,Nanjing University of Information Science&Technology,Nanjing 210044,China [2]Earth System Modeling and Prediction Centre,China Meteorological Administration,Beijing 100081,China [3]University of Chinese Academy of Sciences,Beijing 100049,China [4]Environmental Protection Key Laboratory of Satellite Remote Sensing&Key Laboratory of Remote Sensing and Digital Earth,Aerospace Information Research Institute,Chinese Academy of Sciences.Beijing 100101,China [5]National Satellite Meteorological Center,China Meteorological Administration,Beijing 100081,China

出　　处：《Advances in Atmospheric Sciences》2025年第3期486-500,共15页大气科学进展(英文版)

基　　金：supported by the National Natural Science Foundation of China(Grant No.U2142212);National Key R&D Program of China(Grant No.2019QZKK,Qinghai Tibet KeKao);the National Natural Science Foundation of China(Grant No.U2242211)。

摘　　要：In recent years,polarization remote sensing has garnered increasing attention,particularly within the realm of meteorology.To accurately simulate polarization information,the vector discrete-ordinate radiative transfer(VDISORT)model developed earlier by the community is further enhanced to an advanced version(referred to as A-VDISORT)through an improved ocean surface reflection.The Fresnel reflection matrix,which includes wind-generated roughness and shading effects,is served by an ocean bidirectional reflection distribution function(BRDF).The simulation from AVDISORT is compared with SCIATRAN for a Rayleigh scattering atmosphere,and the influence of water-leaving radiance is analyzed by the PSTAR(Polarized System for Transfer of Atmospheric Radiation) model.For GaoFen-5 Directional Polarimetric Camera(DPC) observations with polarization and multi-angle information,clear-sky pixel recognition over the ocean is first carried out.The DPC reflectance of clear conditions is normalized and compared with the observations.It is shown that A-VDISORT has a high simulation accuracy with a bias of –0.0053.The difference between simulation and observation exhibits a standard normal probability distribution function.

关 键 词：vector radiative transfer equation A-VDISORT ocean BRDF GF-5 DPC 

分 类 号：P407[天文地球—大气科学及气象学]