Extracting sub-pixel vegetation endmember bidirectional reflectance for canopy model inversion using NOAA AVHRR satellite imagery

Biophysical parameter retrieval via BRDF inversion over heterogeneous regions is highly affected by the spatial resolution of the angular reflectance data. An AVHRR unmixing methodology is presented which utilizes high resolution imagery and a geometrical-optical model inversion to recover reflectances of individual land-cover types in savanna regions. Results of a sensitivity study are discussed.