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 14 of 14 for “"SAR processing"”.
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SAR processing using PVM
… Virtual Machine) to improve the speed of processing a SAR (Synthetic Aperture Radar) image. A network of heterogeneous machines were set up as the basis of the parallel virtual machine. SAR processing software was written for testing the PVM. The software performed simplified range and …
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Synthetic Aperture Radar Rapid Detection of Range and Azimuth Velocities Implemented in MATLAB
<p>The Synthetic Aperture Radar (SAR) algorithm processes multiple radar returns from the target space to generate a single high-resolution image. Targets moving through the target space during the capture sequence will appear distorted on the final image. In addition, there is no velocity …
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Aspects of stepped-frequency processing for low-frequency SAR systems
Ultra-wideband synthetic aperture radar (SAR) systems operating in the VHF/UHF region are becoming increasingly popular because of their growing number of applications in the areas of foliage penetration radar (FOPEN) and ground-penetrating radar (GPR). The objective of this thesis is to …
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Parallel implementation of an algorithm for high resolution range profiling using a stepped frequency radar
… waveforms. In order to minimize the overall processing time, a parallel algorithm was developed and tested in a homogeneous cluster of computers. In Ultra-wideband synthetic aperture radar (SAR) systems, stepped-frequency waveforms are preferred for their ability to achieve high range …
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Software simulation of synthetic aperture radar
… is to set out the results of the development of SAR simulation software. The aim of the thesis was to develop such software so that it provides the necessary functionality but is still flexible and simple to use. It addition it must be developed such that it may be compiled and run on as many …
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BYU micro-SAR: A very small, low-power LFM-CW Synthetic Aperture Radar
… light-weight, and low power consumption SAR for flight on a small unmanned aerial vehicle (UAV) at low altitudes. This micro-SAR, or uSAR, consumes only 18 watts of power, ideal for application on a small UAV. To meet these constraints, a linear frequency modulation-continuous wave …
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Motion Compensation of Interferometric Synthetic Aperture Radar
… 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 BYU SAR processing …
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Nearly orthogonal, doppler tolerant waveforms and signal processing for multi-mode radar applications
… radar applications. We then present a signal processing framework for joint synthetic aperture radar (SAR) and ground moving target indication (GMTI) processing that is built upon our proposed waveforms. ^ To design nearly orthogonal and Doppler tolerant waveforms, we applied direct sequence …
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Space/time/frequency methods in adaptive radar
… of view are imaged as defocused objects. The SAR stripmap mode is tuned to stationary ground targets and the mismatch between the SAR processing parameters and the target motion parameters causes the energy to spill over to adjacent image pixels, thus hindering target feature extraction and …
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The design and implementation of a radar simulator
… and implementation of a radar simulator called Sarsim2. The radar simulator was originally developed to produce synthetic range profiles (SRPs) of complex aircraft models. It was then expanded and upgraded to generate simulated synthetic aperture radar (SAR) data. Over the last few years a …
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Advanced Methods for Generating and Processing Simulated Radar Sounder Data for Planetary Missions
… In this context, data simulations are necessary to support the design of the radar, the development of the related processing chain, and the definition of algorithms for the automatic analysis of data. However, state-of-the-art RS simulation methods are characterized by different trade-offs …
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The gulf of cadiz as a natural laboratory for the validation and exploitation of coastal altimetry and model data
… from the European Space Agency (ESA) Grid Processing On Demand (GPOD) service over three coastal sites in Spain: Huelva (GoC), Barcelona (Western Mediterranean Sea), and Bilbao (Bay of Biscay). Two tracks were selected at each site: one ascending and one descending. Data were validated …
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System level simulation of digital designs : a case study
… preprocessor for a synthetic aperture radar (SAR) was designed and simulated. The design was targeted for an FPGA in an attempt to determine the level of complexity of algorithm that can be obtained in an FPGA. This was a hardware solution to the design requirement; a completely software …
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Ανάπτυξη συστήματος επεξεργασίας δεδομένων τηλεπισκόπησης για αυτόματη ανίχνευση και ταξινόμηση περιοχών με περιβαλλοντικές αλλοιώσεις
… στόχο την ανάλυση και επεξεργασία των δεδομένων SAR υπό το πρίσμα του περιεχομένου υφής για την ανίχνευση περιοχών με περιβαλλοντικές αλλοιώσεις όπως είναι οι παράνομες εναποθέσεις απορριμμάτων. Τα δεδομένα που χρησιμοποιήθηκαν προέρχονταν από τον δορυφόρο ENVISAT και το όργανο ASAR του …