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Communication dans un congrès
Landslide observation from ALOS-2/PALSAR-2 data (image correlation techniques and SAR interferometry). Application to salazie circle landslides (La Réunion Island)
Abstract : In the presented study our purpose is to show the interest of space-borne high-resolution L-band Synthetic Aperture Radar (SAR) images (ALOS-2/PALSAR2 data in SM1 mode) for mapping deformation of slow landslides. The methods we combined are sub-pixel correlation offset tracking techniques and differential SAR interferometry. Hell-bourg and Grand Ilet landslides (our test cases) are located on La Réunion Island in the Indian Ocean with motions up to about 1 m/y. The produced deformation maps resulted better than those obtained in previous studies with C or X band SAR data or with current Sentinel-1 data as L-band data are less affected by the vegetated cover than X-or C-band data. Finally, the possibility of deriving 3D mapping of the displacement by combining ascending and descending acquisitions (each one provides 2 components of the deformation: line of sight and azimuth) is investigated.
https://hal-brgm.archives-ouvertes.fr/hal-01777935
Contributeur : Daniel Raucoules <>
Soumis le : mercredi 25 avril 2018 - 11:16:27
Dernière modification le : mardi 30 juin 2020 - 10:30:25
Contributeur : Daniel Raucoules <>
Soumis le : mercredi 25 avril 2018 - 11:16:27
Dernière modification le : mardi 30 juin 2020 - 10:30:25