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Implementation of fast airborne synthetic aperture radar simulation
Synthetic Aperture Radar (SAR) is a powerful tool to map the topographic data of the Earth surface regardless of weather and optical illumination effects. Since nowadays the modem aircraft may be fitted with SAR facility, the aim of this dissertation is to develop fast algorithms for a fast or real-...
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| Format: | Thesis |
| Language: | English |
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Department of Electrical Engineering
2024
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| _version_ | 1867613343230984192 |
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| access_status_str | Open Access |
| author | Kao, Hui-Shun |
| author2 | Wilkinson, A J |
| author_browse | Kao, Hui-Shun Wilkinson, A J |
| author_facet | Wilkinson, A J Kao, Hui-Shun |
| author_sort | Kao, Hui-Shun |
| collection | Thesis |
| description | Synthetic Aperture Radar (SAR) is a powerful tool to map the topographic data of the Earth surface regardless of weather and optical illumination effects. Since nowadays the modem aircraft may be fitted with SAR facility, the aim of this dissertation is to develop fast algorithms for a fast or real-time like SAR simulator which could aid in airplane pilot training. In this dissertation, a geometric approach to the topographic mapping of SAR was studied and then implemented using computer software. In particular, the effect of antenna flight path on the outcome of Synthetic Aperture Radar was examined. To generate necessary data, a SAR simulator was implemented. The geometric relationship between radar sensor and imaging terrain forms the central core of the software. A technique to find a set of sample points on the observed scene in the antenna zero-Doppler plane was examined. A method to work out the scattering points ( center position of resolution cell) was examined, which is based on the derived sample point set and the vector geometry of the observation system. Using the information of scattering points as a basis, techniques to work out radar layover and shadow maps, slant range area to ground range area conversion, backscattering coefficients of scene, SAR power image and signal distribution were derived. The values of backscattering coefficient were based on the empirical data from Ulaby and Dobson's work. Finally, the computer generated results were compared to real SAR results to verify the accuracy and realism of the simulator. A performance evaluation for the processing speed of the simulator was discussed. |
| format | Thesis |
| id | oai:open.uct.ac.za:11427/40019 |
| institution | University of Cape Town (South Africa) |
| language | eng |
| last_indexed | 2026-06-10T12:34:38.153Z |
| license_str | Not specified — see source repository |
| provenance_str_mv | Harvested via OAI-PMH from UCTD — University of Cape Town Open Access Repository |
| publishDate | 2024 |
| publishDateRange | 2024 |
| publishDateSort | 2024 |
| publisher | Department of Electrical Engineering |
| publisherStr | Department of Electrical Engineering |
| record_format | dspace |
| source_str | UCTD — University of Cape Town Open Access Repository |
| spelling | oai:open.uct.ac.za:11427/40019 Implementation of fast airborne synthetic aperture radar simulation Kao, Hui-Shun Wilkinson, A J Electrical Engineering Synthetic Aperture Radar (SAR) is a powerful tool to map the topographic data of the Earth surface regardless of weather and optical illumination effects. Since nowadays the modem aircraft may be fitted with SAR facility, the aim of this dissertation is to develop fast algorithms for a fast or real-time like SAR simulator which could aid in airplane pilot training. In this dissertation, a geometric approach to the topographic mapping of SAR was studied and then implemented using computer software. In particular, the effect of antenna flight path on the outcome of Synthetic Aperture Radar was examined. To generate necessary data, a SAR simulator was implemented. The geometric relationship between radar sensor and imaging terrain forms the central core of the software. A technique to find a set of sample points on the observed scene in the antenna zero-Doppler plane was examined. A method to work out the scattering points ( center position of resolution cell) was examined, which is based on the derived sample point set and the vector geometry of the observation system. Using the information of scattering points as a basis, techniques to work out radar layover and shadow maps, slant range area to ground range area conversion, backscattering coefficients of scene, SAR power image and signal distribution were derived. The values of backscattering coefficient were based on the empirical data from Ulaby and Dobson's work. Finally, the computer generated results were compared to real SAR results to verify the accuracy and realism of the simulator. A performance evaluation for the processing speed of the simulator was discussed. 2024-06-26T06:44:22Z 2024-06-26T06:44:22Z 2004 2024-06-25T13:57:18Z Thesis / Dissertation Masters MSc http://hdl.handle.net/11427/40019 eng application/pdf Department of Electrical Engineering Faculty of Engineering and the Built Environment |
| spellingShingle | Electrical Engineering Kao, Hui-Shun Implementation of fast airborne synthetic aperture radar simulation |
| thesis_degree_str | Master's |
| title | Implementation of fast airborne synthetic aperture radar simulation |
| title_full | Implementation of fast airborne synthetic aperture radar simulation |
| title_fullStr | Implementation of fast airborne synthetic aperture radar simulation |
| title_full_unstemmed | Implementation of fast airborne synthetic aperture radar simulation |
| title_short | Implementation of fast airborne synthetic aperture radar simulation |
| title_sort | implementation of fast airborne synthetic aperture radar simulation |
| topic | Electrical Engineering |
| url | http://hdl.handle.net/11427/40019 |
| work_keys_str_mv | AT kaohuishun implementationoffastairbornesyntheticapertureradarsimulation |