Estimation of the BRDF of land surfaces from ADEOS/POLDER image data

The authors have analyzed the POLDER data over lands obtained in June 13, 1997. The atmospheric effects are removed from observed reflectance images by using their atmospheric correction scheme. In the atmospheric correction, their needed a realistic atmospheric model. The POLDER's unique sensor has an ability to measure both the directional reflectance and polarization in the visible and near-infrared bands reflected by the Earth-atmosphere system. They estimated aerosol optical parameters from both the reflectance and polarization data at 443 nm for the study area. They converted the POLDER image data into the surface reflectance image data using the atmospheric correction scheme based on retrieval aerosol optical parameters. Then they got estimates of the Roujean's BRDF parameters for land surfaces in Mongolia from their surface reflectance images at 443, 670, and 865 nm.