期刊名称：ISPRS Annals of the Photogrammetry, Remote Sensing and Spatial Information Sciences
印刷版ISSN：2194-9042
电子版ISSN：2194-9050
出版年度：2004
卷号：XXXV Part B1
页码：513-517
出版社：Copernicus Publications
摘要：Monitoring of terrestrial vegetation from satellites at global and regional scales re quires accurate and frequent measurements of surface reflectance. In this context, the POLDER instrument leads a key improvement providing, at high temporal resolution, measurements of the Bi - directional Reflectance Distribution Function corrected for atmo spheric effects. In the frame of the ADEOS - 2/POLDER - 2 project, advanced Land Surface Level 3 algorithms have been developed to retrieve the spectral Directional - Hemispherical Reflectances (DHR), the Normalized Difference V egetation Index (NDVI) corrected f or directional effects, the Leaf Area Index (LAI) and the Fraction of Vegetation Cover (FVC). The retrieved parameters are validated following a procedure based upon the analyze of the spatial and temporal variability, the comparison with available equival ent products derived from other sensors by similar or different approaches, and finally the comparison with up - scaled in - situ measurements collected over selected areas
