DERIVING ALBEDO FROM COUPLED MERIS AND MODISSURFACE PRODUCTS

摘要

MERIS Level 2 surface reflectance products are now available to the scientific community. Thisrnpaper demonstrates the production of MERIS-derived surface albedo and Nadir BidirectionalrnReflectance Distribution Function (BRDF) adjusted reflectances by coupling the MERIS data withrnMODIS BRDF products. Initial efforts rely on the specification of surface anisotropy as providedrnby the global MODIS BRDF product for a first guess of the shape of the BRDF and then make usernall of the coincidently available, partially atmospherically corrected, cloud cleared, MERISrnobservations to generate MERIS-derived BRDF and surface albedo quantities for each location.rnComparisons between MODIS (aerosol-corrected) and MERIS (not-yet aerosol-corrected) surfacernvalues from April and May 2003 are also presented for case studies in Spain and California as wellrnas preliminary comparisons with field data from the Devil's Rock Surfrad/BSRN site.