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19 results on '"Thirion-Lefevre, L."'

8. Metamodel-based adaptive use of a coherent polarimetric backscattering simulator for the characterization of forested areas at low frequencies

Author

Vasko, A., Thirion-Lefevre, L., Bilicz, S., Champion, I., Marc Lambert, Gyimóthy, S., DRE - Département de Recherche en Electromagnétisme, EMG - Département Electromagnétisme - L2S, Laboratoire des signaux et systèmes (L2S), Centre National de la Recherche Scientifique (CNRS)-CentraleSupélec-Université Paris-Sud - Paris 11 (UP11)-Centre National de la Recherche Scientifique (CNRS)-CentraleSupélec-Université Paris-Sud - Paris 11 (UP11)-SUPELEC-Campus Gif, SUPELEC-SUPELEC, Sondra, CentraleSupélec, Université Paris-Saclay (SONDRA), ONERA-CentraleSupélec-Université Paris-Saclay, Budapest University of Technology and Economics [Budapest] (BME), Écologie fonctionnelle et physique de l'environnement (EPHYSE - UR1263), Institut National de la Recherche Agronomique (INRA), Centre National de la Recherche Scientifique (CNRS), Budapest University of Technology and Economics, Ecole Supérieure d'Electricité - SUPELEC (FRANCE), Écologie fonctionnelle et physique de l'environnement (EPHYSE), Electromagnetics Academy. Saisissez le nom du laboratoire, du service ou du département., Cambridge, MA, USA., Université Paris-Sud - Paris 11 (UP11)-CentraleSupélec-Centre National de la Recherche Scientifique (CNRS)-Université Paris-Sud - Paris 11 (UP11)-CentraleSupélec-Centre National de la Recherche Scientifique (CNRS)-SUPELEC-Campus Gif, Ecole Supérieure d'Electricité - SUPELEC (FRANCE)-Ecole Supérieure d'Electricité - SUPELEC (FRANCE), Sondra, CentraleSupélec, Université Paris-Saclay (COmUE) (SONDRA), and ONERA-CentraleSupélec-Université Paris Saclay (COmUE)

Subjects
télédétection, rétrodiffusion, [SPI.ELEC]Engineering Sciences [physics]/Electromagnetism, krigeage, [SDE.MCG]Environmental Sciences/Global Changes, télédétection radar, Milieux et Changements globaux, ComputingMilieux_MISCELLANEOUS
Abstract

International audience

Published
2011

19. Identification of Maya ruins covered by jungle using Sentinel-1.

Author

Michenot F, Hinostroza I, Guinvarc'h R, and Thirion-Lefevre L

Abstract

Archaeologists commonly use airborne LIDAR technology to produce 3D models of structures, even when obscured by a forest canopy. However, this technology has a high cost, both from the plane itself and from the processing of the LIDAR point cloud. Furthermore, this technique can only be used over limited regions. This paper proposes a technique that uses SAR satellite imagery to identify man-made structures hidden by a forest canopy. To do so, we exploit the Ascending and Descending passes of Sentinel-1 so that we obtain two images of the candidate site but from different sight directions. Because of cardinal effects, a large enough building will sign differently from the comparatively isotropic forest canopy it is obscured by. Practically, the technique is based on the ratio of backscattered intensity from these two illumination angles and is well adapted for large areas. The advantages and shortcomings are discussed for the specific case of Sentinel-1 SAR images over two Maya archaeological sites in Central America. Our analysis shows that SAR satellite imagery might provide a free, global-scale way of preselecting sites with large or tall structures to complement LIDAR technology., (© 2024. The Author(s).)

Published
2024
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