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Antenna Pattern Modeling and Calibration for Spaceborne SAR Systems

Bachmann, Markus (2016) Antenna Pattern Modeling and Calibration for Spaceborne SAR Systems. DLR-Forschungsbericht. DLR-FB-2016-36. Dissertation. German Aerospace Center. 227 S.

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Synthetic aperture radar (SAR) systems acquire SAR images for manifold scientific and commercial remote sensing applications. A main part of the system, the SAR antenna, needs to be calibrated to deliver high-quality radar data products. For this purpose, novel methods are developed in this thesis involving an antenna model as the key element for the calibration of the system, which derives the antenna diagramms required for accurate image correction. The thesis emphasizes on the main aspects of this antenna pattern modeling and improvements on the antenna model approach: First, calibration and corrections terms applied on the antenna model are introduced, demonstrating the high accuracy of the model and resulting in significant simplifications for SAR system calibration. Second, the optimization of the antenna patterns in order to improve the image quality is described. A new system representation and its effect on image performance is derived and verified. Finally, a novel self-calibration approach is developed which improves the antenna model accuracy beyond the current specifications. Nominal acquisitions can be utilized to calibrate the antenna model and monitor its performance, eliminating the necessity of dedicated measurements over reference targets like rain forest. This makes the antenna model a key feature even for future SAR systems.

Item URL in elib:https://elib.dlr.de/107945/
Document Type:Monograph (DLR-Forschungsbericht, Dissertation)
Title:Antenna Pattern Modeling and Calibration for Spaceborne SAR Systems
AuthorsInstitution or Email of AuthorsAuthor's ORCID iDORCID Put Code
Date:July 2016
Refereed publication:Yes
Open Access:No
Number of Pages:227
Keywords:Antenna Model, Calibration, TerraSAR-X
Institution:German Aerospace Center
Department:Mircowaves and Radar Institute
HGF - Research field:Aeronautics, Space and Transport
HGF - Program:Space
HGF - Program Themes:Earth Observation
DLR - Research area:Raumfahrt
DLR - Program:R EO - Earth Observation
DLR - Research theme (Project):R - Projekt TanDEM-X (old)
Location: Oberpfaffenhofen
Institutes and Institutions:Microwaves and Radar Institute
Microwaves and Radar Institute > Spaceborne SAR Systems
Deposited By: Bachmann, Markus
Deposited On:24 Nov 2016 08:09
Last Modified:16 Jan 2017 18:53

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