Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 20 of 109 for “"Synthetic Aperture Radar (SAR)"”.
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3D intrawall imaging using backprojection for synthetic aperture radar (SAR)
… and Industrial Research (CSIR) has evolving synthetic aperture radar (SAR) capabilities in the C-band and the L-band. Currently, these capabilities are used to generate aerial landscape images; however, to explore the feasibility of using this technology in different environments, an …
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Orthogonally coded array for high-speed synthetic aperture radar (SAR) imaging
Synthetic aperture radar (SAR) imaging, for nondestructive testing (NDT) purposes, has been applied to a wide range of applications. Within the SAR family, many different imaging systems have been designed and developed to optimize the tradeoffs between image quality, resolution, image production …
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Categorization of electromagnetic radiation scatterers by means of synthetic aperture radar (SAR) images
Radar image analysis is the cutting edge technology in Remote Sensing for observing the Earth’s surface. Radars as passive sensors acquire the backscattered solar illumination from the Earth’s surface and as such they are subject to atmospheric conditions. On the other hand, radars can be active …
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Influence of antenna pattern on synthetic aperture radar (SAR) imaging and complex permittivity extraction from images of multilayered media
Microwave and millimeter wave synthetic aperture radar (SAR) imaging technique has been widely used for nondestructive evaluation (NDE) applications. To evaluate the performance of a SAR imaging system, factors including image production time, image quality, and capability to get quantitative …
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Tapping space and spacing taps: Topics in radar-astronomy imaging and sparse filter design
… dissertation addresses topics in the areas of synthetic aperture radar (SAR) and finite impulse-response (FIR) digital filter design.
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Time domain synthetic aperture radar image processing using fast factorised backprojection
Fast Factorised Backprojection(FFBP) is a Synthetic Aperture Radar (SAR) focusing technique which uses Filtered Backprojection(FBP) to produce high quality images in the spatial domain at speeds which rival spectral domain SAR focusing methods. Synthetic Aperture Radar (SAR) focusing is …
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Implementation and analysis of a bayesian approach to topographic reconstruction with multiple antenna synthetic aperture radar interferometry
Multiple-antenna synthetic aperture radar (SAR) interferometry is a single-pass interferometry technique for topographic mapping. A Bayesian model-base approach to topographic recontruction with multiple-antenna SAR interferomety, proposed by Dr. A. J. Wilkinson, is implemented and analysed in this …
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Investigation of topics in radar signal processing
… proposed by W. Lawton for spotlight-mode synthetic aperture radar (SAR). The spatial domain image is produced through a series of convolutions and DFTs, all performed using FFTs. We show that the algorithm implements a form of trapezoidal-to-Cartesian interpolation followed by an FFT.
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Synthetic aperture radar image simulator for interferometry
An interferometric synthetic aperture radar (SAR) simulator was created for the purposes of experimenting with and demonstration of the interferometric process, mission planning and radar image interpretation. The simulation method employs image statistics and terrain geometry to form a synthetic …
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A Consideration of Signal Processing for Spotlight Synthetic Aperture Radar (Ambiguity Functions)
An analysis of spotlight mode synthetic aperture radar (SAR) imaging was carried out using a model based solely on the recognizable similarity it shares with tomographic reconstruction. Doppler effects were relegated to a pre-processing step. Results of this investigation included a determination …
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The planning of a South African airborne synthetic aperture radar measuring campaign
… done in preparation for a South African Airborne Synthetic Aperture Radar (SAR) measuring campaign envisaged for 1994/5. At present both airborne and spaceborne SARs have found a niche in remote sensing with applications in subsurface mapping, surface moisture mapping, vegetation mapping, rock …
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Cramer-Rao Lower Bound Derivation and Performance Analysis for Space-Based SAR SMTI
… Bound (CRLB) for multi-channel space- borne synthetic aperture radar (SAR) system and provides surface moving target in- dication (SMTI) performance analysis. A multi-channel moving target signal model is derived in satellite earth-fixed earth-centered coordinate system. This model is used in …
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ATREngine: An Orientation-Based Algorithm for Automatic Target Recognition
… approach from previous ATR algorithms for 2-D Synthetic Aperture Radar (SAR) images. Prior work in ATR includes Chessa Guilas’ Hausdorff Probabilistic Feature Analysis Approach in 2005 and Daniel Cary’s Optimal Rectangular Fit in 2007.</p> <p>A system incorporating multiple modules performing …
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Joint anisotropy characterization and image formation in wide-angle synthetic aperture radar
Imagery formed from wide-angle synthetic aperture radar (SAR) measurements has fine cross-range resolution in principle. However, conventional SAR image formation techniques assume isotropic scattering, which is not valid with wide-angle apertures. Also, the spatial location of scattering centers …
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Machine Learning and Data Fusion of Simulated Remote Sensing Data
… of simulating a ship wake followed by simulated synthetic aperture radar (SAR) and infra-red (IR) images of these ship wakes. A parametric study across several different ocean environments and simulated remote sensing platforms is conducted to generate a preliminary data set that is used for …
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MIMO radar: signal processing, waveform design, and applications to synthetic aperture imaging
… of multiple-input, multiple-output (MIMO) radar techniques to improve the image quality and area-coverage rate of synthetic aperture imaging systems. A signal processing architecture for MIMO radar is used to understand the applicability of MIMO for synthetic aperture radar (SAR) and …
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A NEW SUBAPERTURE APPROACH TO HIGH SQUINT SYNTHETIC APERTURE RADAR PROCESSING
Synthetic Aperture Radar (SAR) usually operate in a strip-imaging mode with the antenna pointing 90-degree broadside (side-looking). However, in some applications like airborne fire control radar or military reconnaissance where the area of interests cannot be reached instantly, the antenna …
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Motion Compensation of Interferometric Synthetic Aperture Radar
… from a nominal, straight-line flight path of a synthetic aperture radar (SAR) lead to inaccurate and defocused radar images. This thesis is an investigation into the improvement of the motion compensation algorithm created for the BYU inteferometric synthetic aperture radar, YINSAR. The existing …
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