Inferring 2D Local Surface-Deformation Velocities Based on PSI Analysis of Sentinel-1 Data: A Case Study of Öræfajökull, Iceland
Two-dimensional deformation estimates derived from Persistent Scatterer Interferometric (PSI) analysis of Synthetic Aperture Radar (SAR) data can improve the characterisation of spatially and temporally varying deformation processes of Earth’s surface. In this study, we examine the applicability of...
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| Format: | Article |
| Language: | English |
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MDPI AG
2022-07-01
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| Series: | Remote Sensing |
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| Online Access: | https://www.mdpi.com/2072-4292/14/13/3166 |
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| author | Jirathana Dittrich Daniel Hölbling Dirk Tiede Þorsteinn Sæmundsson |
| author_facet | Jirathana Dittrich Daniel Hölbling Dirk Tiede Þorsteinn Sæmundsson |
| author_sort | Jirathana Dittrich |
| collection | DOAJ |
| description | Two-dimensional deformation estimates derived from Persistent Scatterer Interferometric (PSI) analysis of Synthetic Aperture Radar (SAR) data can improve the characterisation of spatially and temporally varying deformation processes of Earth’s surface. In this study, we examine the applicability of Persistent Scatterer (PS) Line-Of-Sight (LOS) estimates in providing two-dimensional deformation information, focusing on the retrieval of the local surface-movement processes. Two Sentinel-1 image stacks, ascending and descending, acquired from 2015 to 2018, were analysed based on a single master interferometric approach. First, Interferometric SAR (InSAR) deformation signals were corrected for divergent plate spreading and the Glacial Isostatic Adjustment (GIA) signals. To constrain errors due to rasterisation and interpolation of the pointwise deformation estimates, we applied a vector-based decomposition approach to solve the system of linear equations, resulting in 2D vertical and horizontal surface-deformation velocities at the PSs. We propose, herein, a two-step decomposition procedure that incorporates the Projected Local Incidence Angle (PLIA) to solve for the potential slope-deformation velocity. Our derived 2D velocities reveal spatially detailed movement patterns of the active Svínafellsjökull slope, which agree well with the independent GPS time-series measurements available for this area. |
| first_indexed | 2024-03-09T10:24:53Z |
| format | Article |
| id | doaj.art-0dac5da9a385439b841d571ca5a32081 |
| institution | Directory Open Access Journal |
| issn | 2072-4292 |
| language | English |
| last_indexed | 2024-03-09T10:24:53Z |
| publishDate | 2022-07-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Remote Sensing |
| spelling | doaj.art-0dac5da9a385439b841d571ca5a320812023-12-01T21:41:00ZengMDPI AGRemote Sensing2072-42922022-07-011413316610.3390/rs14133166Inferring 2D Local Surface-Deformation Velocities Based on PSI Analysis of Sentinel-1 Data: A Case Study of Öræfajökull, IcelandJirathana Dittrich0Daniel Hölbling1Dirk Tiede2Þorsteinn Sæmundsson3Department of Geoinformatics—Z_GIS, University of Salzburg, Schillerstr. 30, 5020 Salzburg, AustriaDepartment of Geoinformatics—Z_GIS, University of Salzburg, Schillerstr. 30, 5020 Salzburg, AustriaDepartment of Geoinformatics—Z_GIS, University of Salzburg, Schillerstr. 30, 5020 Salzburg, AustriaDepartment of Geography and Tourism, University of Iceland, Sturlugata 7, 101 Reykjavik, IcelandTwo-dimensional deformation estimates derived from Persistent Scatterer Interferometric (PSI) analysis of Synthetic Aperture Radar (SAR) data can improve the characterisation of spatially and temporally varying deformation processes of Earth’s surface. In this study, we examine the applicability of Persistent Scatterer (PS) Line-Of-Sight (LOS) estimates in providing two-dimensional deformation information, focusing on the retrieval of the local surface-movement processes. Two Sentinel-1 image stacks, ascending and descending, acquired from 2015 to 2018, were analysed based on a single master interferometric approach. First, Interferometric SAR (InSAR) deformation signals were corrected for divergent plate spreading and the Glacial Isostatic Adjustment (GIA) signals. To constrain errors due to rasterisation and interpolation of the pointwise deformation estimates, we applied a vector-based decomposition approach to solve the system of linear equations, resulting in 2D vertical and horizontal surface-deformation velocities at the PSs. We propose, herein, a two-step decomposition procedure that incorporates the Projected Local Incidence Angle (PLIA) to solve for the potential slope-deformation velocity. Our derived 2D velocities reveal spatially detailed movement patterns of the active Svínafellsjökull slope, which agree well with the independent GPS time-series measurements available for this area.https://www.mdpi.com/2072-4292/14/13/3166Persistent Scatterer Interferometry (PSI)Sentinel-1local deformation2D velocityslope deformationellipsoid incidence angle |
| spellingShingle | Jirathana Dittrich Daniel Hölbling Dirk Tiede Þorsteinn Sæmundsson Inferring 2D Local Surface-Deformation Velocities Based on PSI Analysis of Sentinel-1 Data: A Case Study of Öræfajökull, Iceland Remote Sensing Persistent Scatterer Interferometry (PSI) Sentinel-1 local deformation 2D velocity slope deformation ellipsoid incidence angle |
| title | Inferring 2D Local Surface-Deformation Velocities Based on PSI Analysis of Sentinel-1 Data: A Case Study of Öræfajökull, Iceland |
| title_full | Inferring 2D Local Surface-Deformation Velocities Based on PSI Analysis of Sentinel-1 Data: A Case Study of Öræfajökull, Iceland |
| title_fullStr | Inferring 2D Local Surface-Deformation Velocities Based on PSI Analysis of Sentinel-1 Data: A Case Study of Öræfajökull, Iceland |
| title_full_unstemmed | Inferring 2D Local Surface-Deformation Velocities Based on PSI Analysis of Sentinel-1 Data: A Case Study of Öræfajökull, Iceland |
| title_short | Inferring 2D Local Surface-Deformation Velocities Based on PSI Analysis of Sentinel-1 Data: A Case Study of Öræfajökull, Iceland |
| title_sort | inferring 2d local surface deformation velocities based on psi analysis of sentinel 1 data a case study of oraefajokull iceland |
| topic | Persistent Scatterer Interferometry (PSI) Sentinel-1 local deformation 2D velocity slope deformation ellipsoid incidence angle |
| url | https://www.mdpi.com/2072-4292/14/13/3166 |
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