Please use this identifier to cite or link to this item: http://hdl.handle.net/2122/9634
AuthorsManzo, M.* 
Berardino, P.* 
Bonano, M.* 
Casu, F.* 
Manunta, M.* 
Pepe, A.* 
Pepe, S.* 
Sansosti, E.* 
Solaro, G.* 
Tizzani, P.* 
Zeni, G.* 
Guglielmino, F.* 
Puglisi, G.* 
De Martino, P.* 
Obrizzo, F.* 
Tammaro, U.* 
Lanari, R.* 
TitleA QUANTITATIVE ASSESSMENT OF DInSAR TIME SERIES ACCURACY IN VOLCANIC AREAS: FROM THE FIRST TO SECOND GENERATION SAR SENSORS
Issue DateJul-2012
PublisherIEEE
DOI10.1109/IGARSS.2012.6351410
URIhttp://hdl.handle.net/2122/9634
KeywordsDifferential Synthetic Aperture Radar Interferometry
Small BAseline Subset
surface deformation
Global Positioning System
Subject Classification04. Solid Earth::04.03. Geodesy::04.03.06. Measurements and monitoring 
AbstractWe perform a quantitative assessment of the accuracy of Differential SAR Interferometry (DInSAR) time series in volcanic areas, retrieved through “first” and “second generation” SAR data. In particular, we analyze the impact that the wavelengths and looking geometries may have in the DInSAR measurement retrieval depending on the radar system. To this aim, we focus on the DInSAR algorithm referred to as Small BAseline Subset (SBAS) to generate mean deformation velocity maps and corresponding time series starting from sequences of SAR images. Moreover, we consider collections of SAR data acquired by the ERS-1/2 and ENVISAT (C-band), and COSMO-SkyMed (Xband) sensors over the volcanic area of the Campi Flegrei caldera, Southern Italy. We invert these SAR data sequences through the SBAS-DInSAR technique, thus obtaining C- and X- band deformation time series that we compare to continuous GPS measurements, the latter assumed as reference. The achieved results provide, in addition to a clear picture of the surface deformation phenomena already occurred and occurring in the selected case study, relevant indications for the analysis of the SBAS-DInSAR time series accuracies in volcanic areas passing from the first to second generation SAR sensors.
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