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Author: search.filters.author.Минчев, ДимитърSubject: search.filters.subject.InSAR

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    Digital elevation models of territories under risk in Caucasus region-Armenia
    (Бургаски свободен университет, 2011) M.A. Grigoryan; G.M. Aleksanyan; T.N. Boyakhchyan; G. Kh. Navasardyan; L.A. Gevorgyan; Лазаров, Андон; Минчев, Димитър
    In this paper results of international team from BFU and YSU in the frames of NATO Project NATO CLG: ESP.EAP.CLG. 983876) are described. Digital Elevation Model (DEM) for selected areas of Armenia with high level of risk where natural disasters such as grounds sedimentation, landslides, mudflows, earthquakes are periodically happen, is generated. DEM can be used to create regional system for monitoring natural disasters (to control topographic changes on the territories with high level of risk) on the territory of Armenia. Tools such as InSAR systems, systems of mathematical models, GIS technologies and mathematical algorithm for processing satellite images are used. The results of monitoring and modeling can be periodically introduced to local authorities to take measures in order to prevent probable natural disasters impact on population and communications.
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    SAR pseudo differencial interferogram modeling
    (Бургаски свободен университет, 2011) Лазаров, Андон; Минчев, Димитър
    This work addresses an algorithm of Synthetic Aperture Radar (SAR) interferogram modeling to evaluate surface displacement. The interferogram obtained is called pseudo differential interferogram. Measurements of two SAR satellites placed in one and the same point of observation are used. Linear frequency modulated emitted signal is used to produce reflected by the surface SAR signal. Two-dimensional Fourier transform is applied to extract two single look complex (SLC) images. Pseudo differential interferogram showing the ground displacement is computed. To verify proposed model a numerical experiment realization implemented in MATLAB® environment is presented.