天津师范大学学报（自然科学版）2025，Vol.45Issue(3)：48-57,10.DOI:10.19638/j.issn1671-1114.20250308
地表反射各向异性特征的分类及其在反射率角度归一化中的应用
Classification of surface reflectance anisotropy characteristics and its application in reflectance angle normalization
摘要
Abstract
The reflection of solar radiation on the earth's surface exhibits anisotropic characteristics.An angle normalization approach is applied to its reflectance data to reduce the errors and biases introduced by the wide viewing angle of the wide field of view(WFV)sensor on the GF-1 satellite.The surface's anisotropic reflectance features were classified using anisotropic flatness index(AFX)and the perpendicular anisotropic flatness index(PAFX).A global-scale bidirectional reflectance dis-tribution function(BRDF)archetype database was established based on global time-series MODIS BRDF products.Then,the feasibility of reflectance angle normalization for BRDF archetypes and the applicable conditions for different BRDF archetypes are discussed based on simulated MODIS directional reflectance data.Finally,the archetype A2P2 was applied to GF-1 WFV data,and the data before and after correction was compared with the Landsat data.The results show that:① The introduction of PAFX index can improve the classification accuracy of surface anisotropic reflection characteristics.② Compared with the archetypes with stronger volume scattering,archetypes A2P2,A2P3,A3P1 and A3P2 can accurately correct the reflectance of the zenith angle direction in a wider range observation range.③ Applying the archetype A2P2 as prior BRDF knowledge for the angle normalization of GF-1 WFV data can significantly improve the consistency of reflectance.关键词
高分一号卫星WFV/二向性反射分布函数/反射率/角度归一化/MODISKey words
GF-1 WFV/bidirectional reflectance distribution function(BRDF)/reflectance/angle normalization/moderate-resolution imaging spectroradiometer(MODIS)分类
大气科学引用本文复制引用
梁冬坡,张虎,赵梦卓..地表反射各向异性特征的分类及其在反射率角度归一化中的应用[J].天津师范大学学报（自然科学版）,2025,45(3):48-57,10.基金项目
国家自然科学基金资助项目(41971306). （41971306）
