Landslide Observation from ALOS-2/PALSAR-2 Data (Image Correlation Techniques and Sar Interferometry). Application to Salazie Circle Landslides (La Reunion Island) - Archive ouverte HAL Accéder directement au contenu
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Landslide Observation from ALOS-2/PALSAR-2 Data (Image Correlation Techniques and Sar Interferometry). Application to Salazie Circle Landslides (La Reunion Island)

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Résumé

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.
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hal-02734613 , version 1 (02-06-2020)

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Daniel Raucoules, Fabrizio Tomaro, Michael Foumelis, Caterina Negulescu, Marcello de Michele, et al.. Landslide Observation from ALOS-2/PALSAR-2 Data (Image Correlation Techniques and Sar Interferometry). Application to Salazie Circle Landslides (La Reunion Island). IGARSS 2018 - 2018 IEEE International Geoscience and Remote Sensing Symposium, Jul 2018, Valencia, France. pp.506-509, ⟨10.1109/IGARSS.2018.8517998⟩. ⟨hal-02734613⟩

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