Performance Analysis of Satellite Missions for Multi-Temporal SAR Interferometry
Multi-temporal InSAR (MTI) applications pose challenges related to the availability of coherent scattering from the ground surface, the complexity of the ground deformations, atmospheric artifacts, and visibility problems related to ground elevation. Nowadays, several satellite missions are availabl...
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| Format: | Article |
| Language: | English |
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MDPI AG
2018-04-01
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| Series: | Sensors |
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| Online Access: | http://www.mdpi.com/1424-8220/18/5/1359 |
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| author | Fabio Bovenga Antonella Belmonte Alberto Refice Guido Pasquariello Raffaele Nutricato Davide O. Nitti Maria T. Chiaradia |
| author_facet | Fabio Bovenga Antonella Belmonte Alberto Refice Guido Pasquariello Raffaele Nutricato Davide O. Nitti Maria T. Chiaradia |
| author_sort | Fabio Bovenga |
| collection | DOAJ |
| description | Multi-temporal InSAR (MTI) applications pose challenges related to the availability of coherent scattering from the ground surface, the complexity of the ground deformations, atmospheric artifacts, and visibility problems related to ground elevation. Nowadays, several satellite missions are available providing interferometric SAR data at different wavelengths, spatial resolutions, and revisit time. A new and interesting opportunity is provided by Sentinel-1, which has a spatial resolution comparable to that of previous ESA C-band sensors, and revisit times improved by up to 6 days. According to these different SAR space-borne missions, the present work discusses current and future opportunities of MTI applications in terms of ground instability monitoring. Issues related to coherent target detection, mean velocity precision, and product geo-location are addressed through a simple theoretical model assuming backscattering mechanisms related to point scatterers. The paper also presents an example of a multi-sensor ground instability investigation over Lesina Marina, a village in Southern Italy lying over a gypsum diapir, where a hydration process, involving the underlying anhydride, causes a smooth uplift and the formation of scattered sinkholes. More than 20 years of MTI SAR data have been processed, coming from both legacy ERS and ENVISAT missions, and latest-generation RADARSAT-2, COSMO-SkyMed, and Sentinel-1A sensors. Results confirm the presence of a rather steady uplift process, with limited to null variations throughout the whole monitored time-period. |
| first_indexed | 2024-04-13T07:43:14Z |
| format | Article |
| id | doaj.art-144f71ee12614c6195f41c5498d48ab1 |
| institution | Directory Open Access Journal |
| issn | 1424-8220 |
| language | English |
| last_indexed | 2024-04-13T07:43:14Z |
| publishDate | 2018-04-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Sensors |
| spelling | doaj.art-144f71ee12614c6195f41c5498d48ab12022-12-22T02:55:48ZengMDPI AGSensors1424-82202018-04-01185135910.3390/s18051359s18051359Performance Analysis of Satellite Missions for Multi-Temporal SAR InterferometryFabio Bovenga0Antonella Belmonte1Alberto Refice2Guido Pasquariello3Raffaele Nutricato4Davide O. Nitti5Maria T. Chiaradia6Research National Council of Italy, ISSIA, 70126 Bari, ItalyResearch National Council of Italy, ISSIA, 70126 Bari, ItalyResearch National Council of Italy, ISSIA, 70126 Bari, ItalyResearch National Council of Italy, ISSIA, 70126 Bari, ItalyGAP S. R. L., 70125 Bari, ItalyGAP S. R. L., 70125 Bari, ItalyDipartimento di Fisica “M. Merlin”, Politecnico di Bari, 70125 Bari, ItalyMulti-temporal InSAR (MTI) applications pose challenges related to the availability of coherent scattering from the ground surface, the complexity of the ground deformations, atmospheric artifacts, and visibility problems related to ground elevation. Nowadays, several satellite missions are available providing interferometric SAR data at different wavelengths, spatial resolutions, and revisit time. A new and interesting opportunity is provided by Sentinel-1, which has a spatial resolution comparable to that of previous ESA C-band sensors, and revisit times improved by up to 6 days. According to these different SAR space-borne missions, the present work discusses current and future opportunities of MTI applications in terms of ground instability monitoring. Issues related to coherent target detection, mean velocity precision, and product geo-location are addressed through a simple theoretical model assuming backscattering mechanisms related to point scatterers. The paper also presents an example of a multi-sensor ground instability investigation over Lesina Marina, a village in Southern Italy lying over a gypsum diapir, where a hydration process, involving the underlying anhydride, causes a smooth uplift and the formation of scattered sinkholes. More than 20 years of MTI SAR data have been processed, coming from both legacy ERS and ENVISAT missions, and latest-generation RADARSAT-2, COSMO-SkyMed, and Sentinel-1A sensors. Results confirm the presence of a rather steady uplift process, with limited to null variations throughout the whole monitored time-period.http://www.mdpi.com/1424-8220/18/5/1359SARMulti-temporal/Multi-sensor SAR InterferometryGround displacement monitoring |
| spellingShingle | Fabio Bovenga Antonella Belmonte Alberto Refice Guido Pasquariello Raffaele Nutricato Davide O. Nitti Maria T. Chiaradia Performance Analysis of Satellite Missions for Multi-Temporal SAR Interferometry Sensors SAR Multi-temporal/Multi-sensor SAR Interferometry Ground displacement monitoring |
| title | Performance Analysis of Satellite Missions for Multi-Temporal SAR Interferometry |
| title_full | Performance Analysis of Satellite Missions for Multi-Temporal SAR Interferometry |
| title_fullStr | Performance Analysis of Satellite Missions for Multi-Temporal SAR Interferometry |
| title_full_unstemmed | Performance Analysis of Satellite Missions for Multi-Temporal SAR Interferometry |
| title_short | Performance Analysis of Satellite Missions for Multi-Temporal SAR Interferometry |
| title_sort | performance analysis of satellite missions for multi temporal sar interferometry |
| topic | SAR Multi-temporal/Multi-sensor SAR Interferometry Ground displacement monitoring |
| url | http://www.mdpi.com/1424-8220/18/5/1359 |
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