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Scattering Centers Monitoring in Refocused SAR Images on a High Resolution DEM

Abstract : Infrastructure monitoring applications can require the tracking of slowly moving points of a certain structure. Given a certain point from a structure to be monitored, in the context of available SAR products where the image is already focused in a slant range - azimuth grid, it is not obvious if this point is the scattering center, if it is in layover or if it is visible from the respective orbit. This paper proposes a scattering center monitoring procedure based on refocusing a set of SAR images on a provided high-resolution DEM of the structure. The scattering centers of the refocused image are detected in the 4-D tomography framework by testing if the main response is at zero elevation in the local elevation-velocity spectral distribution obtained using the Capon estimator. The algorithm is validated on real data acquired with the TerraSAR-X satellite over the Puylaurent water dam in France during March-June 2012. The relative displacements between scattering regions show very good agreement with the in situ measurements.
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Submitted on : Friday, June 4, 2021 - 7:15:05 PM
Last modification on : Wednesday, October 20, 2021 - 3:35:28 AM
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Andrei Anghel, Gabriel Vasile, Cornel Ioana, Remus Cacoveanu, Silviu Ciochina, et al.. Scattering Centers Monitoring in Refocused SAR Images on a High Resolution DEM. IGARSS 2014 - IEEE International Geoscience and Remote Sensing Symposium, Jul 2014, Québec, Canada. pp.1883-1886, ⟨10.1109/IGARSS.2014.6946824⟩. ⟨hal-01104814⟩



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