A statistical approach for the integration of multi-temporal InSAR and GNSS-PPP ground deformation measurements

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dc.authorid0000-0003-3091-8501en_US
dc.authorid0000-0003-1243-8299en_US
dc.authorid0000-0002-3310-352Xen_US
dc.authorid0000-0002-8490-890Xen_US
dc.authorid0000-0003-2049-6587en_US
dc.authorid0000-0003-0861-013Xen_US
dc.authorid0000-0002-8060-9208en_US
dc.authorid0000-0002-0174-5894en_US
dc.authorid0000-0002-7843-3565en_US
dc.contributor.authorDelen, Ahmet
dc.contributor.authorBalık Şanlı, Fusun
dc.contributor.authorAbdikan, Saygın
dc.contributor.authorDoğan, Ali Hasan
dc.contributor.authorDurdağ, Utkan Mustafa
dc.contributor.authorÖcalan, Taylan
dc.contributor.authorErdoğan, Bahattin
dc.contributor.authorCalò, Fabiana
dc.contributor.authorPepe, Antonio
dc.date.accessioned2024-12-09T07:59:01Z
dc.date.available2024-12-09T07:59:01Z
dc.date.issued2024
dc.departmentAÇÜ, Mühendislik Fakültesi, Harita Mühendisliği Bölümüen_US
dc.description.abstractDetermining and monitoring ground deformations is critical for hazard management studies, especially in megacities, and these studies might help prevent future disaster conditions and save many lives. In recent years, the Golden Horn, located in the southeast of the European part of Istanbul within a UNESCO-protected region, has experienced significant changes and regional deformations linked to rapid population growth, infrastructure work, and tramway construction. In this study, we used Interferometric Synthetic Aperture Radar (InSAR) and Global Navigation Satellite System (GNSS) techniques to investigate the ground deformations along the Golden Horn coastlines. The investigated periods are between 2015 and 2020 and 2017 and 2020 for InSAR and GNSS, respectively. For the InSAR analyses, we used sequences of multi-temporal synthetic aperture radar (SAR) images collected by the Sentinel-1 and ALOS-2 satellites. The ground displacement products (i.e., time series and velocity maps) were then cross-compared with those achievable using the Precise Point Positioning (PPP) technique for the GNSS solutions, which can provide precise positions with a single receiver. In the proposed analysis, we compared the ground displacement velocities obtained by both methods by computing the standard deviations of the difference between the relevant observations considering a weighted least square estimation procedure. Additionally, we identified five circle buffers with different radii ranging between 50 m and 250 m for selecting the most appropriate coherent points to conduct the cross-comparison analysis. Moreover, a vertical displacement rate map was produced. The comparison of the vertical ground velocities derived from PPP and InSAR demonstrates that the PPP technique is valuable. For the coherent stations, the vertical displacement rates vary between ?4.86 mm/yr and ?23.58 mm/yr and ?9.50 and ?27.77 mm/yr for InSAR and GNSS, respectively.
dc.identifier.doi10.3390/s24010043
dc.identifier.issn1424-8220
dc.identifier.issue1en_US
dc.identifier.scopusqualityQ1
dc.identifier.urihttp://dx.doi.org/10.3390/s24010043
dc.identifier.urihttps://hdl.handle.net/11494/5140
dc.identifier.volume24en_US
dc.identifier.wosqualityQ2
dc.indekslendigikaynakWeb of Science
dc.indekslendigikaynakScopus
dc.language.isoenen_US
dc.publisherMultidisciplinary Digital Publishing Institute (MDPI)en_US
dc.relation.ispartofSensors
dc.relation.publicationcategoryMakale - Uluslararası Hakemli Dergi - Kurum Öğretim Elemanıen_US
dc.rightsinfo:eu-repo/semantics/openAccessen_US
dc.subjectALOS-2en_US
dc.subjectDeformationen_US
dc.subjectGNSS-PPPen_US
dc.subjectPS InSARen_US
dc.subjectSentinel-1en_US
dc.subjectStatistical Analysisen_US
dc.titleA statistical approach for the integration of multi-temporal InSAR and GNSS-PPP ground deformation measurementsen_US
dc.typeArticle

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