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oai:recercat.cat:2117/1032482026-01-30T08:14:13Zcom_2072_1033col_2072_452950

Ground-penetrating radar prospection at the Jesuits' Church in Valletta, Malta Persico, Rafaelle d'Amico, Sebastiano Pajewski, Lara Pérez Gracia, María de la Vega Universitat Politècnica de Catalunya. Departament de Resistència de Materials i Estructures a l'Enginyeria Universitat Politècnica de Catalunya. GIES - Geofísica i Enginyeria Sísmica Àrees temàtiques de la UPC::Enginyeria civil::Geotècnia Geophysics GPR cultural heritage NDT Malta Geofísica Georadar In this paper, results of Ground-Penetrating Radar measurements performed at the church of the Jesuits in Valletta, Malta, are presented. This experimental activity was carried out during an International Training School on “Ground-Penetrating Radar for civil engineering and archaeology,” organized by COST Action TU1208 “Civil engineering applications of Ground-Penetrating Radar” and hosted by the University of Malta on January 25-29, 2016. The reported case study is of particular interest, as it shows that the well-known and commonly-adopted method of the diffraction hyperbolas, for the estimation of the propagation velocity from the measured radargrams, is not always reliable. As an alternative, a sequential migration with progressively lower trial propagation velocities was proposed and successfully used. Results presented in this paper include a series of B-Scans and depth slices. Several tombs were detected and located in the subsurface of the main nave of the church. Postprint (published version) 2016 Conference report Persico, R., d'Amico, S., Pajewski, L., Perez-Gracia, V. Ground-penetrating radar prospection at the Jesuits' Church in Valletta, Malta. A: European Meeting of Environmental and Engineering Geophysics. "22nd European Meeting of Environmental and Engineering Geophysics: Near Surface Geoscience 2016". Barcelona: European Association of Geoscientists & Engineers (EAGE), 2016. https://hdl.handle.net/2117/103248 10.3997/2214-4609.201602031 eng http://earthdoc.eage.org/publication/search?pubsearchkey=Persico http://creativecommons.org/licenses/by-nc-nd/3.0/es/ Open Access Attribution-NonCommercial-NoDerivs 3.0 Spain application/pdf east=14.512467384338379; north=35.89760255143314; name=La Valletta, Malta European Association of Geoscientists & Engineers (EAGE)