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Precise Topography- and Aperture-Dependent Motion Compensation for Airborne SAR

Macedo, Karlus A. C. and Scheiber, Rolf (2004) Precise Topography- and Aperture-Dependent Motion Compensation for Airborne SAR. IEEE Geoscience and Remote Sensing Letters, 2 (2), pp. 172-176. IEEE Piscataway. DOI: 10.1109/LGRS.2004.842465. ISSN 1545-598X.

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Official URL: http://ieeexplore.ieee.org/Xplore/guesthome.jsp

Abstract

Efficient synthetic aperture radar (SAR) processing algorithms are unable to exactly implement the aperture- and topography-dependent motion compensation due to the superposition of the synthetic apertures of several targets having different motion errors and potentially different topographic heights. Thus, during motion compensation, a reference level is assumed, resulting in residual phase errors that impact the focusing, geometric fidelity, and phase accuracy of the processed SAR images. This letter proposes a new short fast Fourier transform-based postprocessing methodology capable of efficient and precise compensation of these topography- and aperture-dependent residual phase errors. In addition to wide beamwidth (very high resolution) SAR systems, airborne repeat-pass interferometry especially benefits from this approach, as motion compensation can be significantly improved, especially in areas with high topographic changes. Repeat-pass interferometric data of the E-SAR system of the German Aerospace Center (DLR) are used to demonstrate the performance of the proposed approach.

Document Type:Article
Title:Precise Topography- and Aperture-Dependent Motion Compensation for Airborne SAR
Authors:
AuthorsInstitution or Email of Authors
Macedo, Karlus A. C.UNSPECIFIED
Scheiber, RolfUNSPECIFIED
Date:2004
Journal or Publication Title:IEEE Geoscience and Remote Sensing Letters
Refereed publication:Yes
In ISI Web of Science:Yes
Volume:2
DOI:10.1109/LGRS.2004.842465
Page Range:pp. 172-176
Editors:
EditorsEmail
IEEE, UNSPECIFIED
Publisher:IEEE Piscataway
ISSN:1545-598X
Status:Published
Keywords:Airborne, differential interferomertry (D-InSAR), interferometry, motion errors, synthetic aperture radar (SAR), topography, wide beamwidth.
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 -- no assignement (old)
Location: Oberpfaffenhofen
Institutes and Institutions:Microwaves and Radar Institute > SAR Technology
Deposited By: Dr.-Ing. Rolf Scheiber
Deposited On:09 Jan 2006
Last Modified:14 Jan 2010 20:37

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