00000nam 2200000zi 4500 9.936178 CaOODSP 20241007095055 m o d f cr |n||||||||| 240328e198906uubccad obt f000 0 eng d CaOODSP eng rda CaOODSP eng fre n-cn--- DR52-11/6-1989E-PDF Hughes, B. A. (Blyth Alvin), 1936- author. First-order Bragg SAR imagery of Kelvin wakes and moving internal wave fields / by B. A. Hughes. Victoria, B.C. : Defence Research Establishment Pacific = Centre de recherches pour la défense pacifique : Research and Development Branch, Department of National Defence, June 1989 1 online resource (ix, 44, 3, [5] pages) : illustrations, charts text txt rdacontent computer c rdamedia online resource cr rdacarrier DREP Technical memorandum ; 89-13 Digitized edition from print [produced by Defence Research and Development Canada]. Includes bibliographical references (page 44). "Two theoretical investigations are given relating to SAR imaging of perturbed surface waves. The first is an analysis of the effect of a long wavelength corrugation on the SAR image formed by 1st-order Bragg scattering from a deterministic sea wave pattern such as a Kelvin wake. A standard SAR processor is assumed. The second is a stochastic treatment of the SAR imagery formed by a 1st-order Bragg scattering process from surface waves modulated by the horizontal surface currents of internal waves. Propagational velocities (normalized by the SAR platform velocity) are included to first order. For the Kelvin wake analysis it is shown that the vertical curvature of the corrugating wave can rotate the effective Bragg acceptance angle by up to approximately equals to 10 degrees for typical wave parameters. [...]"--abstract (page iii). Includes abstract in French. Wakes (Fluid dynamics) Detection Mathematical models. Surface waves (Oceanography) Mathematical models. Synthetic aperture radar Image quality. Sillage (Dynamique des fluides) Détection Modèles mathématiques. Ondes de surface (Océanographie) Modèles mathématiques. Radar à synthèse d'ouverture Qualité de l'image. Technical reports lcgft Rapports techniques rvmgf Defence Research Establishment Pacific, issuing body. Canada. Department of National Defence. Research and Development Branch, issuing body. Technical memorandum (Defence Research Establishment Pacific) 89-13. (CaOODSP)9.936067 PDF 1.63 MB https://publications.gc.ca/collections/collection_2024/rddc-drdc/DR52-11-6-1989-eng.pdf DREP-TM-89-13