The bi-directional surface reflectance are obtained from the POLDER-3/PARASOL multi-angular measurements after cloud removal, and correction of effects of atmospheric components (aerosols, water vapour, and ozone) absorption and diffusion. A detailed description of these algorithms is available.
These data, acquired under viewing angles up to 60°-70°, and for the full azimuth range, provide an accurate sampling of the land surface bi-directional reflectance distribution function. They contain unique informations allowing the retrieval of vegetation structural parameters, as showed by studies made with POLDER-1 data (Chen et al., 2005). Available from July 2005 to present, they cover now a full vegetative cycle.

The POLDER-3/PARASOL bi-directional surface reflectance, acquired between November 2005 and October 2006, have been exploited by LSCE to create 4 BRDF databases.

The bi-directional POLDER-3/PARASOL surface reflectances are available upon request.