Landslide Observation from ALOS-2/PALSAR-2 Data (Image Correlation Techniques and Sar Interferometry). Application to Salazie Circle Landslides (La Reunion Island)
| Autor: | Fabrizio Tomaro, Daniel Raucoules, Caterina Negulescu, Marcello de Michele, Bertr Aunay, Michael Foumelis |
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| Přispěvatelé: | Bureau de Recherches Géologiques et Minières (BRGM) (BRGM) |
| Rok vydání: | 2018 |
| Předmět: |
[SDU.STU.TE]Sciences of the Universe [physics]/Earth Sciences/Tectonics
Synthetic aperture radar 021110 strategic defence & security studies L band Digital image correlation Offset (computer science) Radar tracker 0211 other engineering and technologies Landslide 02 engineering and technology ALOS-2 Index Terms— InSAR Geodesy Index Terms-InSAR Azimuth Interferometry [SDU]Sciences of the Universe [physics] [SDE]Environmental Sciences Geology 021101 geological & geomatics engineering |
| Zdroj: | IGARSS IGARSS 2018 IGARSS 2018, Jul 2018, Valence, Spain IGARSS 2018-2018 IEEE International Geoscience and Remote Sensing Symposium IGARSS 2018-2018 IEEE International Geoscience and Remote Sensing Symposium, Jul 2018, Valencia, France. pp.506-509, ⟨10.1109/IGARSS.2018.8517998⟩ |
| DOI: | 10.1109/igarss.2018.8517998 |
| Popis: | International audience; 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. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
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