Title :
An improved land-surface parameters retrieval from POLDER bidirectional measurements during HAPEX-Sahel
Author :
Roujean, Jean-Louis ; Tanre, Didier ; Breon, Francois Marie ; Deuze, Jean Luc
Author_Institution :
CNRM, Meteo France, Toulouse, France
Abstract :
Analyses the anisotropic properties of Sahelian vegetation as seen by POLDER in the framework of the 1992 HAPEX-Sahel experiment. The backscattering effect is the main perturbation of the surface albedo measurement. A model is used to firstly correct this effect and further generates reflectance data sets in Sun-view geometries where relationships have been established between vegetation indices and land-surface key-parameters such as the fraction of vegetation, the LAI and the fAPAR
Keywords :
geophysical techniques; remote sensing; AD 1992; Africa; HAPEX; LAI; POLDER bidirectional measurement; Sahel; Sun-view geometry; anisotropic properties; arid zone; backscattering effect; desert; geophysical measurement technique; land surface; land-surface parameters retrieval; model; optical imaging; remote sensing; semiarid area; surface albedo; terrain mapping; vegetation; visible; Anisotropic magnetoresistance; Backscatter; Energy measurement; Geometry; Hydrologic measurements; Optical sensors; Reflectivity; Satellites; Solid modeling; Sun; Vegetation;
Conference_Titel :
Geoscience and Remote Sensing Symposium, 1995. IGARSS '95. 'Quantitative Remote Sensing for Science and Applications', International
Conference_Location :
Firenze
Print_ISBN :
0-7803-2567-2
DOI :
10.1109/IGARSS.1995.521729
