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UID:pretalx-foss4g-it-2023-CERCVY@talks.staging.osgeo.org
DTSTART;TZID=GMT:20230613T091500
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DESCRIPTION:In recent years\, Multi-Temporal Interferometric Synthetic Aper
 ture Radar (MT-InSAR) has become an increasingly popular technique for Str
 uctural Health Monitoring (SHM) purposes. The technique allows for the mea
 surement of ground deformation with high accuracy and spatial resolution b
 y utilizing Synthetic Aperture Radar (SAR) imagery taken from multiple tim
 e periods. MT-InSAR has been proven to be particularly effective in urban 
 contexts due to the high reflectivity provided by structures\, which makes
  them visible in SAR imagery. Several interferometric algorithms have been
  developed that are specifically tailored to the urban environment\, makin
 g it possible to extract detailed information about buildings and infrastr
 ucture. Moreover\, the growing availability of high-resolution SAR satelli
 te constellations\, such as the Italian COSMO-SkyMed\, has also contribute
 d to the increased use of MT-InSAR for SHM purposes. These constellations 
 provide high-quality SAR imagery in which a high density of Measurement Po
 ints (MP) can be detected\, allowing for the recording of detailed informa
 tion on individual structures. With MT-InSAR\, it is possible to collect i
 nformation about the deformations at both global scale\, detecting the mos
 t critical areas within the urban context\, and local scale\, focusing on 
 individual structures such as buildings or bridges. Despite its many advan
 tages\, MT-InSAR has some drawbacks that must be taken into consideration.
  The technique requires complex post-processing and expert interpretation 
 of results to avoid data misinterpretation\, and technical difficulties su
 ch as geocoding errors and noisiness in the time series can be encountered
  during the analysis. Furthermore\, the technique is sensitive to changes 
 in the environment\, such as changes in vegetation cover or weather condit
 ions\, which can affect the quality of the SAR imagery. Overall\, MT-InSAR
 \, despite its limitations\, is a cost-effective and highly efficient tool
  for monitoring structures. It offers significant benefits in identifying 
 potential problems and detecting deformations\, providing valuable insight
 s into the stability and health of structures. With the increasing availab
 ility of high-quality SAR imagery\, MT-InSAR is predicted to have even mor
 e widespread usage for SHM purposes in the future.\nIn this work\, the MT-
 InSAR technique is applied in the urban center of Verona (northern Italy)\
 , a city full of Cultural Heritage assets. The study examined images captu
 red by the COSMO-SkyMed constellation in Stripmap mode for both ascending 
 and descending orbits during the period 2011-2022\, to detect deformations
  at both global and local scales. Initially\, spatial interpolation algori
 thms were utilized to gauge the overall deformations at the urban level\, 
 identifying the most critical areas. The results show that the area of Ver
 ona presents an overall stability: the velocities of deformation of the hi
 storic center lie within the so-called range of stability (-1.5 – +1.5 m
 m/year)\, whereas the most critical areas can be identified in the norther
 n part of the city in correspondence of the northern portion of the town b
 eltway. Later\, attention was directed towards some of the main cultural a
 ssets in the city\, namely the Roman Arena\, the Lamberti Tower\, and the 
 Roman Theater. For each asset several MPs were detected\, distributed alon
 g the structures' height. The information contained in each MP\, in terms 
 of displacement velocity and displacement time series\, allow for an under
 standing of the structural stability and of the evolution of the deformati
 ons during the monitoring period. As the urban analysis suggested\, the in
 vestigated structures appear to be quite stable and no evident criticaliti
 es could be detected. However\, despite the low magnitude of the deformati
 ons measured in the city of Verona\, this research demonstrates the potent
 ial of MT-InSAR in the field of structural monitoring of Cultural Heritage
 .
DTSTAMP:20260517T103715Z
LOCATION:Sala Videoconferenza @ PoliBa
SUMMARY:Structural monitoring of Cultural Heritage assets at urban and loca
 l scale through MT-InSAR - Amedeo Caprino\, Francesca da Porto
URL:https://talks.staging.osgeo.org/foss4g-it-2023/talk/CERCVY/
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