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| Titel |
Comparison of Advanced Differential Interferometric SAR methods for the retrieval of surface deformation in south-east Sicily |
| VerfasserIn |
Andreas Vollrath, Francesco Zucca, Salvatore Stramondo, Francesco Guglielmino, Alessandro Bonforte |
| Konferenz |
EGU General Assembly 2014
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| Medientyp |
Artikel
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| Sprache |
Englisch
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| Digitales Dokument |
PDF |
| Erschienen |
In: GRA - Volume 16 (2014) |
| Datensatznummer |
250099179
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| Publikation (Nr.) |
 EGU/EGU2014-14933.pdf |
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| Zusammenfassung |
| The study provides a comparative analysis of Advanced Differential Interferometric SAR
(A-DInSAR) methods and processing approaches. State-of-the-art A-DInSAR techniques,
such as Persistent Scatterers Interferometry (PSI) or the Small BASeline (SBAS) approach
are powerful geodetic tools with a large potential for an operational, cost-effective mapping
of surface deformations up to an accuracy of 1 mm/y on a regional scale. Both approaches
focus on different characteristics of the scatterers within a resolution cell. While
PSI extracts the phase change by analyzing stable, dominant scatterers, the SBAS
technique is sensitive to stable, but distributed scatterers. In order to assess the practical
implications of the two approaches we processed a 8-year spanning time-series of
ENVISAT ASAR data for the heterogeneous, rural environment in south-eastern Sicily,
Italy and its hinterland. Different natural and anthropogenic induced deformation
phenomena are present within the study area. In addition to the PSI and SBAS approach,
a combined method, called Multi-Temporal Interferometry (MTI), was applied
using the StaMPS software. The density of retrieved points was confronted to the
different land cover classes. In addition, deviations between the different methods are
presented. The results reveal the complimentary character of both approaches for the
study site and suggest that the MTI approach is favorable for wide area analysis.
Validation with GPS measurements from the INGV network was undertaken and the
integration in the framework of the SISTEM approach, where different measurements are
combined, allowed for the derivation of three-dimensional surface deformation. |
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