Title :
LAI and fAPAR mapping at global scale by model inversion against spaceborne POLDER data
Author :
Bicheron, P. ; Leroy, M. ; Hautecoeur, O.
Author_Institution :
Centre d´´Etudes Spatiales de la Biosphere, CESBIO, Toulouse, France
Abstract :
The extraction of the leaf area index (LAI), or the fraction of absorbed photosynthetically active radiation (fAPAR), is one the most challenging issues related to the use of existing (AVHRR/NOAA, POLDER/ADEOS) and forthcoming (VGT/SPOT4, MODIS-MISR/EOS) satellite sensors operating in the reflected solar radiation system. Efforts in this area are at an early stage. An algorithm for the retrieval of LAI and fAPAR based on the inversion of a BRDF model against airborne POLDER data acquired over various biomes has been successfully tested. In this paper, the authors present the first performance of the algorithm against available spaceborne level 2 data (cloud screened, atmospherically corrected) over Austral Africa
Keywords :
geophysical techniques; remote sensing; BRDF model; LAI; bidirectional reflectance distribution function; fAPAR; fraction of absorbed photosynthetically active radiation; geophysical measurement technique; global scale; leaf area index; light scattering; model inversion; optical imaging; retrieval algorithm; satellite remote sensing; solar radiation; spaceborne POLDER data; terrain mapping; vegetation mapping; Africa; Atmospheric modeling; Biosensors; Clouds; Earth Observing System; Information retrieval; Satellites; Sensor systems; Solar radiation; Testing;
Conference_Titel :
Geoscience and Remote Sensing Symposium Proceedings, 1998. IGARSS '98. 1998 IEEE International
Conference_Location :
Seattle, WA
Print_ISBN :
0-7803-4403-0
DOI :
10.1109/IGARSS.1998.691359
