43. XXXIV МЕЖДУНАРОДЕН СИМПОЗИУМ СЪВРЕМЕННИТЕ ТЕХНОЛОГИИ, ОБРАЗОВАНИЕТО И ПРОФЕСИОНАЛНАТА ПРАКТИКА В ГЕОДЕЗИЯТА И СВЪРЗАНИТЕ С НЕЯ ОБЛАСТИ София, 06 – 08 ноември 2024 г. –––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––– XXXIV INTERNATIONAL SYMPOSIUM ON MODERN TECHNOLOGIES, EDUCATION AND PROFESSIONAL PRACTICE IN GEODESY AND RELATED FIELDS Sofia, 06 – 08 November 2024
ПОВИШАВАНЕ КАЧЕСТВОТО НА ИНФОРМАЦИЯТА ПОЛУЧАВАНА ОТ РАДАРИ СЪС СИНТЕЗИРАНА АПЕРТУРА ПОСРЕДСТВОМ СЪВМЕСТНО ИЗПОЛЗВАНЕ НА ТРИСТЕННИ ОТРАЖАТЕЛИ И GNSS ИЗМЕРВАНИЯ
Проф. д-р инж. Христо Николовдоц. д-р инж. Константин Методиев, ИКИТ – БАН проф. д-р инж. Мила Атанасова, НИГГГ – БАН д-р инж., Иван Калчев, " Гео плюс " ЕООД
AUGMENTING THE INFORMATION QUALITY FROM SYNTHETIC APERTURE RADARS USING INNOVATIVE PASSIVE REFLECTORS
SUMMARY
Prof. Hristo Nikolov, Assoc. Prof. Konstantin Metodiev, SRTI-BAS Prof. Dr. Eng Mila Atanasova, NIGGG-BAS Dr. Eng. Ivan Kaltchev, LTD
Over the past two decades, satellite remote sensing( RS) techniques have become indispensable for investigating land surface dynamics, particularly geodynamic processes of varying magnitudes, including earthquakes, tectonic deformations, landslides, and subsidence phenomena. The increasing application of RS in geodynamic studies is primarily driven by advancements in spaceborne synthetic aperture radar( SAR) technology, the development of high-precision RS instruments, improvements in computational processing capabilities, and the continuous refinement of SAR data analysis methodologies.
A key data source within the Copernicus program is the Sentinel-1( S-1) satellite, which provides consistent SAR observations independent of atmospheric conditions. Differential interferometric synthetic aperture radar( DInSAR) and its advanced derivatives enable the extraction of both topographic information and precise measurements of surface displacements. However, in nonurbanized areas, where natural reflectivity is often insufficient for reliable phase measurements, the deployment of artificial passive persistent reflectors— commonly referred to as corner reflectors( CRs)— is necessary to enhance data accuracy. These reflectors serve as stable, high-backscatter reference points, improving the reliability of interferometric phase measurements. To the best of our knowledge, no such passive reflectors have been established in Bulgaria to support SAR-based deformation monitoring. To address this limitation, we designed, developed, and implemented a pilot network of six CRs at selected locations. This study presents the technical specifications, deployment methodology, and preliminary results from the newly established CR network, with a focus on its application in monitoring surface deformations.
Keywords: SAR data, surface displacements, passive reflectors design, stable backscatter
РЕЗЮМЕ
През последните две десетилетия използването на методи и технологии за изследвания на земната повърхност от спътници за изучаване на протичащите процеси по нея, и по-конкретно
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