A real-time reconfigurable timing and control unit for Synthetic Aperture Radar

Synthetic Aperture Radar (SAR) is one of the variant of active remote sensing whereby it transmits energy and measures the return signal to obtain ground information. SAR is typically mounted on a moving platform such as an aircraft or a spacecraft. In this work, the SAR system is mounted on a small...

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Main Author:	Boey, Huey Shen
Format:	Thesis
Published:	2013
Subjects:	TK Electrical engineering Electronics Nuclear engineering
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id	my-mmu-ep.5898
record_format	uketd_dc
spelling	my-mmu-ep.58982014-12-29T05:16:25Z A real-time reconfigurable timing and control unit for Synthetic Aperture Radar 2013-05 Boey, Huey Shen TK Electrical engineering. Electronics Nuclear engineering Synthetic Aperture Radar (SAR) is one of the variant of active remote sensing whereby it transmits energy and measures the return signal to obtain ground information. SAR is typically mounted on a moving platform such as an aircraft or a spacecraft. In this work, the SAR system is mounted on a small Unmanned Aerial Vehicle (UAV). One of the main obstacles faced by the UAV SAR is its instability during flight mission which causes motion errors. Theoretically, a SAR system modelling assumes that all flight path parameters (such as velocity, altitude and heading angle) are constants in generating SAR images. This would mean that ideally, the ground sampling length in between each transmission is also constant. However, this is never true in real case. These motion errors are mainly caused by wind turbulence, drag or limitations of the aircraft itself. Of all motion errors, one of the most unavoidable motion errors is the variance in velocity of the aircraft during flight which subsequently causes uneven sampling length. Velocity error causes defocussing of SAR imaging. Image with velocity error would have a “stretched” like effect in the azimuth profile. 2013-05 Thesis http://shdl.mmu.edu.my/5898/ http://library.mmu.edu.my/diglib/onlinedb/dig_lib.php masters Multimedia University Faculty of Engineering and Technology
institution	Multimedia University
collection	MMU Institutional Repository
topic	TK Electrical engineering Electronics Nuclear engineering
spellingShingle	TK Electrical engineering Electronics Nuclear engineering Boey, Huey Shen A real-time reconfigurable timing and control unit for Synthetic Aperture Radar
description	Synthetic Aperture Radar (SAR) is one of the variant of active remote sensing whereby it transmits energy and measures the return signal to obtain ground information. SAR is typically mounted on a moving platform such as an aircraft or a spacecraft. In this work, the SAR system is mounted on a small Unmanned Aerial Vehicle (UAV). One of the main obstacles faced by the UAV SAR is its instability during flight mission which causes motion errors. Theoretically, a SAR system modelling assumes that all flight path parameters (such as velocity, altitude and heading angle) are constants in generating SAR images. This would mean that ideally, the ground sampling length in between each transmission is also constant. However, this is never true in real case. These motion errors are mainly caused by wind turbulence, drag or limitations of the aircraft itself. Of all motion errors, one of the most unavoidable motion errors is the variance in velocity of the aircraft during flight which subsequently causes uneven sampling length. Velocity error causes defocussing of SAR imaging. Image with velocity error would have a “stretched” like effect in the azimuth profile.
format	Thesis
qualification_level	Master's degree
author	Boey, Huey Shen
author_facet	Boey, Huey Shen
author_sort	Boey, Huey Shen
title	A real-time reconfigurable timing and control unit for Synthetic Aperture Radar
title_short	A real-time reconfigurable timing and control unit for Synthetic Aperture Radar
title_full	A real-time reconfigurable timing and control unit for Synthetic Aperture Radar
title_fullStr	A real-time reconfigurable timing and control unit for Synthetic Aperture Radar
title_full_unstemmed	A real-time reconfigurable timing and control unit for Synthetic Aperture Radar
title_sort	real-time reconfigurable timing and control unit for synthetic aperture radar
granting_institution	Multimedia University
granting_department	Faculty of Engineering and Technology
publishDate	2013
_version_	1747829598698078208

A real-time reconfigurable timing and control unit for Synthetic Aperture Radar

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