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Airborne SAR: The Multipath Effect and Circular SAR

Pinheiro, Muriel and Prats, Pau and Scheiber, Rolf (2008) Airborne SAR: The Multipath Effect and Circular SAR. DLR-Interner Bericht. DLR-IB 551-8/2008. Diploma. ITA - Instituto Technologica de Aeronautica, Sao Jose dos Campos , Brasil.

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The work is divided in two parts. In the first part, an algorithm to remove the multipath effect in SAR images is presented. Currently, the radome containing the F-SAR antenna is located at the bottom of the plane, which in combination with strong side lobes in the antenna pattern results in a multipath component in the SAR signal. The undesired effects are mainly range undulations in the amplitude and the phase of the processed image. An algorithm to remove the multipath is presented and validated with along-track interferometric and polarimetric data. The second part of the work presents results with circular SAR. With a circular SAR acquisition it is possible to obtain information of the scene with 360° aspect angle observation, resulting in images with sub-wavelength resolution, as well as the possibility to perform 3-D image reconstruction (tomography). Algorithms to perform radiometric calibration and autofocus are presented, as well as 2-D and 3-D processing results with data acquired by both E-SAR (L-band) and F-SAR (X-band) systems.

Item URL in elib:https://elib.dlr.de/56517/
Document Type:Monograph (DLR-Interner Bericht, Diploma)
Title:Airborne SAR: The Multipath Effect and Circular SAR
AuthorsInstitution or Email of AuthorsAuthor's ORCID iDORCID Put Code
Date:December 2008
Refereed publication:No
Open Access:No
Keywords:synthetic aperture radar (SAR), multipath, circular SAR, tomography
Institution:ITA - Instituto Technologica de Aeronautica, Sao Jose dos Campos , Brasil
HGF - Research field:Aeronautics, Space and Transport (old)
HGF - Program:Space (old)
HGF - Program Themes:W EO - Erdbeobachtung
DLR - Research area:Space
DLR - Program:W EO - Erdbeobachtung
DLR - Research theme (Project):W - Vorhaben Flugzeug-SAR (old)
Location: Oberpfaffenhofen
Institutes and Institutions:Microwaves and Radar Institute
Microwaves and Radar Institute > SAR Technology
Deposited By: Prats, Dr. Pau
Deposited On:15 Dec 2008
Last Modified:15 Jan 2010 00:36

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