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Summary of Proposal MTH3389

TitleMulti-Temporal analysis of VHR SAR data for the post-seismic damage assessment of the Mw. 6.0 earthquake in Italy (August 2016)
Investigator Esch, Thomas - German Aerospace Center, German Remote Sensing Data Center, Land Surface
Team Member
Miss Palacios, Daniela - Hochschule fur Technik Stuttgart, Photogrammetry and Geoinformatics
SummaryRapid post-seismic damage assessment is crucial for initiating quick emergency response actions,as it helps to evaluate the extent and severity of the damage, localise the areas of greatest need and develop relief operations such as evacuation, sheltering,search and rescue, mass casualty management, and rehabilitation activities. Remote Sensing systems, especially VHR Optical data are the initial source of information for such assessments, however, from time to time the data is unavailable due to weather conditions. The approach of the given project is based on the collection of TerraSAR-X data for the post-seismic damage assessment of three providences affected by the Mw 6.0Earthquake that hit Italy on the 24th of August, 2016 (Acummoli,Arquata del Tronto and Pescara del Tronto). The objective is to make an evaluation of the effectiveness of VHR SAR data in comparison to VHR spaceborne and airborne optical data, for the rapid assessment of post-seismic damages by comparing the results of the analysis with those obtained by the CopernicusEMS. The methodology is based in a multi-temporal analysis of pre- and post-event images, using a combination of well-known techniques: interferometric coherence,intensity correlation, and basic change detection techniques for rapid post-disaster mapping. The data requirements to perform such analyses are at least three SAR acquisitions: 2 pre-event images and 1-post event image acquired shortly after the disaster and all the images have to be acquired at the same imaging geometry. Firstly, two areas where a high number of damaged buildings were identified, will be assess edby means of VHR SAR data and compared with the maps generated by the CopernicusEMS. The task consist in identifying the same number of buildings and the same degree of damage based on decorrelation parameters. Secondly, if the results of the first task are positive, the same methodology will be employed to analyse one area where the Copernicus EMS couldn’t perform an assessment due to cloudy VHR optical satellite images.The results of this final experiment will be compared with the maps generated by the Copernicus EMS using VHR Optical aerial images. The deliverables of the each task will be detailed maps of the identified damaged infrastructures and their level of damage. The final product is a complete dissertation report describing in detail the methods, justifications and final results.

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