Paper Info
Title
Comparative analysis of recent satellite missions for multi-temporal SAR interferometry.
Abstract
Multi-temporal InSAR (MTI) applications pose challenges related to the availability of coherent scattering from the ground surface, the complexity of the ground deformations, the atmospheric artifacts, the visibility problems related to the ground elevation. Nowadays, several satellite missions are available providing interferometric SAR data at different wavelengths, spatial resolutions, and revisit time. A new interesting opportunity is provided by Sentinel-1 mission, which has a spatial resolution comparable to previous ESA C-band missions, and revisit times reduced to up to 6 days. It is envisioned that, by offering regular, global-scale coverage, improved temporal resolution and freely available imagery, Sentinel-1 will guarantee an increasing use of MTI for ground displacement investigations. According to these different SAR space-borne missions, the present work discusses current and future opportunities of MTI applications to ground instability monitoring. Issues related to coherent target detection and mean velocity precision will be addressed through a simple theoretical model assuming backscattering mechanisms related to point scatterers. The paper also presents an example of multi-sensor ground instability investigation over the site of Marina di Lesina, Southern Italy, a village lying over a gypsum diapir, where a hydration process, involving the underlying anhydride, causes a smooth uplift pattern affecting the entire village area, and the formation of scattered sinkholes. More than 20 years of MTI SAR data have been used, coming from both legacy ERS and ENVISAT missions, and last-generation Radarsat-2, COSMO-SkyMed, and Sentinel-1A sensors.
Year
DOI
Venue
2016
10.1117/12.2240490
Proceedings of SPIE
Keywords
DocType
Volume
SAR,Multi-temporal / Multi-sensor SAR Interferometry,Ground displacement monitoring
Conference
10003
ISSN
Citations 
PageRank 
0277-786X
0
0.34
References 
Authors
0
4
Name
Order
Citations
PageRank
Fabio Bovenga17019.41
Alberto Refice24612.80
Antonella Belmonte311.48
Guido Pasquariello4248.56