COUPLING POLARIMETRIC L-BAND INSAR AND AIRBORNE LIDAR TO CHARACTERIZE THE GEOMORPHOLOGICAL DEFORMATIONS IN THE PITON DE LA FOURNAISE VOLCANO | INSTITUT DE PHYSIQUE DU GLOBE DE PARIS

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  COUPLING POLARIMETRIC L-BAND INSAR AND AIRBORNE LIDAR TO CHARACTERIZE THE GEOMORPHOLOGICAL DEFORMATIONS IN THE PITON DE LA FOURNAISE VOLCANO

Type de publication:

Journal Article

Source:

2010 Ieee International Geoscience and Remote Sensing Symposium, p.1911-1913 (2010)

Numéro d'accès:

WOS:000287933802014

URL:

http://ieeexplore.ieee.org/xpl/articleDetails.jsp?arnumber=5649245

Mots-clés:

Géophysique spatiale et planétaire ; volcanologie ;, UMR 7154

Résumé:

Until recently the coarse resolution of topographic mapping acted as a break on understanding the forces and processes that shape the Earth's surface. However, active surface deformation is an important indicator for the earth crustal dynamics since it is directly linked to earthquakes, volcanic eruptions and landslides. Both airborne laser scanning systems (LiDAR) and spaceborne interferometric synthetic aperture radars (InSAR) have provided valuable information for many case studies requiring highresolution characterization of ground movement in relatively large areas to assess the threat and impact of natural hazards especially for volcanic eruptions. The Piton de la Fournaise volcano (Reunion Island, France) is one of the most active basaltic shield volcanoes in the world. It has reached an anomalous activity level in the past years with a major eruption occurring in April 2007. In this paper, we explore the statistical, spatial and temporal behavior of the L-Band backscattering coefficient at both HH and HV polarizations over different type of terrains in the Fournaise lava field as a function of the LiDAR intensity data. The correlation will be used in setting empirical models to correct for the L-Band phase distortion on ash and rough surfaces in volcanic terrains.

Notes:

Heggy, Essam Sedze, Melanie Bretar, Frederic Jacquemoud, Stephane Rosen, Paul A. Wada, Kozin Staudacher, Thomas IEEE International Geoscience and Remote Sensing Symposium JUN 25-30, 2010 Honolulu, HI IEEE 978-1-4244-9566-5