Radargrammetry DEM Generation Using High-Resolution SAR Imagery Over La Palma During the 2021 Cumbre Vieja Volcanic Eruption
Por:
Palama R., Monserrat O., Crippa B., Crosetto M., Bru G., Ezquerro P., Bejar-Pizarro M.
Publicada:
1 ene 2023
Resumen:
This letter aims at investigating the potential of high-resolution (up to 0.7 x 0.5 m(2)) synthetic aperture radar (SAR) images in generating digital elevation models (DEMs) using the radargrammetry technique. In this work, we process two SAR images recorded by the Capella Space X-band satellite borne radar sensor on two consecutive days, October 2 and 3, 2021, over La Palma (Canary Islands, Spain) during the Cumbre Vieja volcanic eruption. We adopt an iterative point aggregation algorithm to identify matching pixels between the two images; then, the height estimation is performed using a distance minimization routine over the previously identified pairs of matching points. The resultant radargrammetric DEM is validated against a lidar-based DEM for various land cover (LC) classes, showing a good agreement in the areas less affected by lava flow. An estimation of the lava thickness is performed, yielding profiles of the cone area, which are compared to the photogrammetry estimates obtained from the Pleiades mission data.
Filiaciones:
Palama R.:
Centre Tecnològic de Telecomunicacions de Catalunya (CTTC), Geomatics Research Unit, Castelldefels, 08860, Spain
Ctr Tecnol Telecomunicac Catalunya CTTC, Geomat Res Unit, Castelldefels 08860, Spain
Monserrat O.:
Centre Tecnològic de Telecomunicacions de Catalunya (CTTC), Geomatics Research Unit, Castelldefels, 08860, Spain
Ctr Tecnol Telecomunicac Catalunya CTTC, Geomat Res Unit, Castelldefels 08860, Spain
Crippa B.:
University of Milan, Department of Geophysics, Milan, 20129, Italy
Univ Milan, Dept Geophys, I-20129 Milan, Italy
Crosetto M.:
Centre Tecnològic de Telecomunicacions de Catalunya (CTTC), Geomatics Research Unit, Castelldefels, 08860, Spain
Ctr Tecnol Telecomunicac Catalunya CTTC, Geomat Res Unit, Castelldefels 08860, Spain
Bru G.:
Geological Survey of Spain (IGME-CSIC), Geohazards InSAR Laboratory and Modelling Group (InSARlab), Madrid, 28003, Spain
CSIC, Geohazards InSAR Lab & Modelling Grp InSARlab, Geol Survey Spain IGME, Madrid 28003, Spain
Ezquerro P.:
Geological Survey of Spain (IGME-CSIC), Geohazards InSAR Laboratory and Modelling Group (InSARlab), Madrid, 28003, Spain
CSIC, Geohazards InSAR Lab & Modelling Grp InSARlab, Geol Survey Spain IGME, Madrid 28003, Spain
Bejar-Pizarro M.:
Geological Survey of Spain (IGME-CSIC), Geohazards InSAR Laboratory and Modelling Group (InSARlab), Madrid, 28003, Spain
CSIC, Geohazards InSAR Lab & Modelling Grp InSARlab, Geol Survey Spain IGME, Madrid 28003, Spain
Open Access
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