Obtaining ground deformations by multitemporal DInSAR processing in vicinity of archaeological site “Solnitsata-Provadia”

Hristo Nikolov; Mila Atanasova

doi:10.1117/12.2599762

12 September 2021 Obtaining ground deformations by multitemporal DInSAR processing in vicinity of archaeological site “Solnitsata-Provadia”

Hristo Nikolov, Mila Atanasova

Author Affiliations +

Proceedings Volume 11861, Microwave Remote Sensing: Data Processing and Applications; 118610C (2021) https://doi.org/10.1117/12.2599762
Event: SPIE Remote Sensing, 2021, Online Only

Abstract

The Differential Radar Interferometry (DInSAR) technique provides fast and accurate means for detecting small displacements of the Earth’s surface having a magnitude in centimeters range. Applying this method monitoring of ground movements of natural or anthropogenic origin are reliably registered. The information is produced from the interferograms resulting from purposely processing the phase signal present in two SAR images from different dates over the one and the same area. The motivation behind this research was to study the crustal deformations that pose treat to the archaeological site “Solnitsa-Provadia” located in the area Mirovo salt deposit near the town Provadia, NE Bulgaria. It needs to be mentioned that the said monument is dated back to VI-V millennium BC and includes the remnants of an ancient city near Provadia. The registered deformations in the region are due to natural and anthropogenic factors. The mentioned factors have undisputable negative impact on the preservation of this historical site and justify the necessity of regular monitoring of the ongoing geodynamic processes. In this research the authors provide results based on multitemporal processing of freely accessible SAR data from Sentinel-1 mission by ESA. The information concerning the detected surface deformations was obtained by the DInSAR method. The multitemporal processing included creation of set of interferometric images from several periods with time span of four months. This interval was selected since it was needed to decrease the decorrelation of the phase signal caused by the vegetation and noise introduced by the atmosphere. In order to increase the reliability of the output information SAR data from ascending and descending orbits were processed which provided two different stereoscopic-like views to the investigated area. The results also have been compared with the trends of ground motions using data from repeated multi-year results geodetic measurements made at Mirovo geodynamic network.

Conference Presentation

Citation Download Citation

Hristo Nikolov and Mila Atanasova "Obtaining ground deformations by multitemporal DInSAR processing in vicinity of archaeological site “Solnitsata-Provadia”", Proc. SPIE 11861, Microwave Remote Sensing: Data Processing and Applications, 118610C (12 September 2021); https://doi.org/10.1117/12.2599762

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