Synthetic Aperture Radar (SAR) Imaging of Complex Scenes Considering Near-Field Scattering Characteristics
Konferenz: EUSAR 2016 - 11th European Conference on Synthetic Aperture Radar
06.06.2016 - 09.06.2016 in Hamburg, Germany
Tagungsband: EUSAR 2016
Seiten: 4Sprache: EnglischTyp: PDFPersönliche VDE-Mitglieder erhalten auf diesen Artikel 10% Rabatt
Karabayir, Osman; Saynak, Ugur; Coskun, Ahmet Faruk; Bati, Baki; Biyik, Mehmet; Bati, Oezge; Serim, Hueseyin Avni (TÜBITAK BILGEM, Turkey)
Kent, Sedef (Istanbul Technical University, Turkey)
Synthetic Aperture Radar (SAR) imaging from low altitude aerial vehicles has been gaining much importance together with the widespread use of Unmanned Aerial Vehicles (UAVs). Relatively shorter distances between the mentioned vehicles and imaged scenes require the consideration of near-field scattering phenomenon. In this paper, authors has focused on the design of a SAR simulator for low altitude vehicles that takes the stated phenomenon into account. The inputs of the simulator are a 3-D complex scene consisting of artificial targets and natural environment constructed by triangular surface meshes and parameters of the SAR system. Scatterer reflectivities are evaluated by utilizing the near-field Physical Optics (PO) method and SAR raw data is generated in time domain. Finally, the simulator processes the raw data and constructs the SAR images via Doppler Beam Sharpening (DBS) algorithm.