Evaluation of different InSAR multi-baseline construction methods over a dam in southern Italy

Claudia Pipitone; Antonino Maltese; Gino Dardanelli; Fulvio Capodici; Jan-Peter Muller; Goffredo La Loggia

doi:10.1117/12.2326909

10 October 2018 Evaluation of different InSAR multi-baseline construction methods over a dam in southern Italy

Claudia Pipitone, Antonino Maltese, Gino Dardanelli, Fulvio Capodici, Jan-Peter Muller, Goffredo La Loggia

Proceedings Volume 10783, Remote Sensing for Agriculture, Ecosystems, and Hydrology XX; 107831A (2018) https://doi.org/10.1117/12.2326909
Event: SPIE Remote Sensing, 2018, Berlin, Germany

Abstract

Monitoring dam displacements using different techniques allows an evaluation of their structural behaviour over time. In this study, dam displacements (for the Castello dam, Agrigento, Italy) have been investigated using different Interferometric Synthetic Aperture Radar (InSAR) techniques exploiting a freely available dataset from the EU Copernicus Sentinel-1 SAR built by the European Space Agency (ESA). The dataset includes Sentinel 1A (S1A) images acquired in dual-polarization and Interferometric Wide (IW) swath using the Terrain Observation with Progressive Scans SAR (TOPSAR) mode. Three main Multi-Baseline Construction methods based on the identification of Persistent Scatterers (PS) have been tested, within a scene including an extra-urban area surrounding the dam. The evaluation of the best strategy is carried out over few images (7) with a constant acquisition time-span of 12 days, except for the first image, acquired 24 days before the next one. Three different multi-baseline construction methods have been investigated in this preliminary research to test the capability of these InSAR techniques in finding a time series of displacements with high accuracy in extra-urban areas also. The star graph results in displacement appear to be more in agreement with GNSS measurements than other techniques.

Citation Download Citation

Claudia Pipitone, Antonino Maltese, Gino Dardanelli, Fulvio Capodici, Jan-Peter Muller, and Goffredo La Loggia "Evaluation of different InSAR multi-baseline construction methods over a dam in southern Italy", Proc. SPIE 10783, Remote Sensing for Agriculture, Ecosystems, and Hydrology XX, 107831A (10 October 2018); https://doi.org/10.1117/12.2326909

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KEYWORDS

Interferometric synthetic aperture radar

Picosecond phenomena

Satellite navigation systems

Reflectivity

Stars

Synthetic aperture radar

Image processing

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