Assessment of the P- and L-band SAR tomography for the characterization of tropical forests
Evaluation des bandes P et L SAR tomographique pour la caractérisation des forets tropicales
Ho Tong Minh, D. ; Le Toan, T. ; Tebaldini, S. ; Rocca, F. ; Iannini, L.
Type de document
Communication scientifique avec actes
Affiliation de l'auteur
IRSTEA MONTPELLIER UMR TETIS FRA ; CESBIO TOULOUSE FRA ; POLITECNICO DI MILANO DEIB ITA ; POLITECNICO DI MILANO DEIB ITA ; DELFT UNIVERSITY OF TECHNOLOGY DELFT NLD
Résumé / Abstract
The objective of this paper is to provide a better understanding of tomographic capabilities in characterization of dense forested areas at P-and L-band. The analysis is carried out on airborne data acquired by ONERA over the site of Paracou, French Guyana, during the ESA campaign TropiSAR. The results shown support the idea that ground- and -volume interactions play a negligible role at L-band, whereas they are significant at P-band. For a dense forest of 30 m and more, there is very weak ground contribution at L-band. The L-band tomographic profile is quite disturbed as compared to the P-band profile in dense tropical forest areas. In this condition, the use of tomographic imaging at L-band in tropical forests appears limited. However, when the forest top height is roughly below 20 m (e.g., in forest regrowth), the tomographic results are expected to be the same as in boreal forests. Whereas P-band tomography allow us to retrieve the whole forest vertical structure, better characterizing of the ground and/or volume scatterings and providing an unique solution in high biomasss ranging from 150-600 t/ha.
IGARSS 2015, 26/07/2015 - 31/07/2015, Milan, ITA