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oai:recercat.cat:2117/3672302026-01-18T06:20:09Zcom_2072_1033col_2072_452950

Interferometric SAR deformation timeseries: a quality index Wassie, Yismaw Abera Mirmazloumi, Seyed Mohammad Monserrat Hernández, Oriol Crippa, Bruno Palamá, Riccardo Barra, Anna Crosetto, Michele Universitat Politècnica de Catalunya. Doctorat en Ciència i Tecnologia Aeroespacials Universitat Politècnica de Catalunya. Doctorat en Enginyeria del Terreny Àrees temàtiques de la UPC::Enginyeria de la telecomunicació Interferometry Synthetic aperture radar Radar d'obertura sintètica Interferometria Estimating unknown absolute phase from a wrapped observation is a challenging and ill-posed problem that possibly leads to misinterpretation of interferometric SAR (InSAR) deformation results. In this study, we introduce a quality index to cluster post-phase unwrapping multi-master InSAR timeseries outputs based on the estimated phase residuals and redundancy of network of interferograms. The index is supposed to indicate the reliability of a timeseries, including the identification of persistent scatterers (PSs) possibly affected by phase unwrapping jumps. The algorithm was tested on two Sentinel-1 interferometric datasets with 622,991 and 95,398 PSs, generated from the PSI processing chain PSIG of the geomatics division of CTTC. Promising result have been achieved-especially in identifying erroneous PSs with phase unwrapping jumps. Along with existing temporal phase consistency checking algorithms, the approach could provide rich information toward a better interpretation of the deformation timeseries results. This work has been funded by AGAUR, Generalitat de Catalunya, in the framework of Resolution EMC/ 2459/2019, FI-2020. Peer Reviewed Postprint (published version) 2021 Conference report Abera, Y. [et al.]. Interferometric SAR deformation timeseries: a quality index. A: SPIE Remote Sensing. "Microwave Remote Sensing: Data Processing and Applications: 13-17 September 2021, online only, Spain". Washington: International Society for Photo-Optical Instrumentation Engineers (SPIE), 2021, p. 118610A-1-118610A-9. DOI 10.1117/12.2600142. https://hdl.handle.net/2117/367230 10.1117/12.2600142 eng https://spie.org/Publications/Proceedings/Paper/10.1117/12.2600142 http://creativecommons.org/licenses/by-nc-nd/3.0/es/ Open Access Attribution-NonCommercial-NoDerivs 3.0 Spain application/pdf International Society for Photo-Optical Instrumentation Engineers (SPIE)