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dc.contributor.authorAkbari, Vahid
dc.contributor.authorMotagh, Mahdi
dc.contributor.authorRajabi, Mohammad Ali
dc.contributor.authorYahya, Djamour
dc.date.accessioned2011-04-05T07:46:56Z
dc.date.available2011-04-05T07:46:56Z
dc.date.issued2010
dc.description.abstractThis study presents the weighted least squares method based on Interferometric Synthetic Aperture Radar (InSAR) images to retrieve spatial-temporal evolution of land subsidence in Mashhad Valley, northeast Iran. Using the analysis of a few interferograms covering the 2003-2005 period, Motagh et al (GJI 2006) presented a preliminary analysis of the subsidence in this area. Here we extend this study and use additional SAR data to retrieve time-dependent deformation in Mashhad Valley We utilize 17 SAR images acquired by the ENVISAT satellite in a descending orbit during Jun. 2004-Nov. 2007, make 53 differential interferograms spanning different long- and short-term intervals, and do a time series analysis to extract deformation signals out of differential interferograms. Time series analysis suggests that the subsidence occurs within a northwest-southeast elongated elliptical shaped bowl along the axis of Mashhad valley. The maximum accumulated subsidence during 1260 days reaches about 86 cm, located northeast of Mashhad City. The comparison between InSAR time series results with continuous GPS station in the city of Tous, northeast of Mashhad, yields comparable results at the level of 1 cm.en
dc.identifier.cristinIDFRIDAID 787167
dc.identifier.urihttps://hdl.handle.net/10037/3066
dc.identifier.urnURN:NBN:no-uit_munin_2797
dc.language.isoengen
dc.rights.accessRightsopenAccess
dc.subjectFjernanalyseen
dc.subjectVDP::Mathematics and natural science: 400::Physics: 430::Astrophysics, astronomy: 438en
dc.subjectVDP::Matematikk og Naturvitenskap: 400::Fysikk: 430::Astrofysikk, astronomi: 438en
dc.subjectVDP::Technology: 500::Electrotechnical disciplines: 540::Electronics: 541en
dc.subjectVDP::Teknologi: 500::Elektrotekniske fag: 540::Elektronikk: 541en
dc.titleTime Series Investigation of Land Subsidence Using a Weighted Least Squares Adjustment Based on Image Mode Interferometric Dataen
dc.typeConference objecten
dc.typeKonferansebidragen


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