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The waves polarized SAR imaging simulation and inversion technique

Author: LuoXiaoYan
Tutor: ZhaoZhiQin
School: University of Electronic Science and Technology
Course: Signal and Information Processing
Keywords: Synthetic Aperture Radar Inverse Synthetic Aperture Radar Ocean Scattering Imaging Simulation Wave information retrieval
CLC: TN958
Type: Master's thesis
Year: 2011
Downloads: 74
Quote: 0
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Abstract


Ocean remote sensing technology has become an important technical means of monitoring marine research tools with high resolution synthetic aperture radar (SAR) , all-time , all-day , a large area of ??observation waves unique advantages, including , SAR has become an important tool to monitor ocean . When the electromagnetic wave irradiation to the sea , by the sea surface capillary waves produce Bragg scattering , the longer wavelength waves waves through the capillary waves tilt modulation , hydrodynamic modulation , speed the poly -speed modulation modulation to be in the SAR image imaging . In addition, the the wave physical information is to study one of the important applications of SAR imaging of waves . This paper first reviews the the SAR imaging theoretical basis of the basic operating principle of the SAR and inverse synthetic aperture radar (InSAR) , waves of microwave scattering theory and rough sea well sufficient theoretical preparation for a follow-up study . Secondly, according to the theory of waves randomly rough sea surface modeling , two-scale model constructed sea swell contains random rough sea ; taking into account the impact of large and small - scale sea . The sea - based model , Bragg scattering model and geometrical optics approximation analog polarimetric SAR images of different parameters under the waves . Finally, in the basis of polarimetric SAR imaging simulation of waves , the inversion of wave information . Radon transform is applied to the paper, the image processing , the waves direction information extraction , and the successful use of the Radon transform inversion waves main wave propagation direction , and statistics prove the inversion accuracy of the indicator . Paper uses the fast Fourier transform to strike the waves of the main wavelength , which is a very mature strike waves main wavelength . In addition, the use of simulated InSAR data inversion main waves and wave height , according to the statistical properties of the effectiveness of the method in the analysis of the different wave conditions , show that this method can effectively within a certain range of accuracy inversion of high sea waves .

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