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Doppler-related Distortions in TOPS SAR Images

Rodriguez Cassola, Marc and Prats-Iraola, Pau and De Zan, Francesco and Scheiber, Rolf and Reigber, Andreas and Geudtner, Dirk and Moreira, Alberto (2015) Doppler-related Distortions in TOPS SAR Images. IEEE Transactions on Geoscience and Remote Sensing, 53 (1), pp. 25-35. IEEE - Institute of Electrical and Electronics Engineers. DOI: 10.1109/TGRS.2014.2313068 ISSN 0196-2892

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Abstract

A direct consequence of the TOPS acquisition geometry and the steering in azimuth of the antenna is the timevarying Doppler centroid within bursts. If this fact is not properly accommodated during SAR image formation, undesired distortions in both azimuth and range dimensions of the focused SAR images may appear. Azimuth distortions are caused by the local mismatch of both squint and topography. Range distortions arise from the inaccurate accommodation of the intrapulse motion of the platform, usually known as the stop-and-go approximation. Conventional spaceborne SAR image formation schemes will be, in general, unable to provide accurate TOPS SAR images. These distortions are discussed and evaluated for exemplary low-Earthorbit SAR scenarios. Compensation strategies are presented and validated with TerraSAR-X TOPS data. A discussion of the potential impact on the Sentinel-1 interferometric-wide-swath and extra-wide-swath modes (i.e., TOPS) is also given.

Item URL in elib:https://elib.dlr.de/92008/
Document Type:Article
Additional Information:©2014 IEEE. Personal use of this material is permitted. However, permission to reprint/republish this material for advertising or promotional purposes or for creating new collective works for resale or redistribution to servers or lists, or to reuse any copyrighted component of this work in other works must be obtained from the IEEE
Title:Doppler-related Distortions in TOPS SAR Images
Authors:
AuthorsInstitution or Email of AuthorsAuthors ORCID iD
Rodriguez Cassola, MarcUNSPECIFIEDUNSPECIFIED
Prats-Iraola, PauUNSPECIFIEDUNSPECIFIED
De Zan, FrancescoUNSPECIFIEDUNSPECIFIED
Scheiber, RolfUNSPECIFIEDUNSPECIFIED
Reigber, AndreasUNSPECIFIEDUNSPECIFIED
Geudtner, DirkUNSPECIFIEDUNSPECIFIED
Moreira, AlbertoUNSPECIFIEDUNSPECIFIED
Date:January 2015
Journal or Publication Title:IEEE Transactions on Geoscience and Remote Sensing
Refereed publication:Yes
Open Access:Yes
Gold Open Access:No
In SCOPUS:Yes
In ISI Web of Science:Yes
Volume:53
DOI :10.1109/TGRS.2014.2313068
Page Range:pp. 25-35
Publisher:IEEE - Institute of Electrical and Electronics Engineers
ISSN:0196-2892
Status:Published
Keywords:Burst-mode acquisitions, Sentinel-1, spaceborne SAR missions, synthetic aperture radar (SAR), Terrain Observation with Progressive Scans (TOPS), TerraSAR-X (TerraSAR-X), wide-swath SAR modes.
HGF - Research field:Aeronautics, Space and Transport
HGF - Program:Space
HGF - Program Themes:Earth Observation
DLR - Research area:Raumfahrt
DLR - Program:R EO - Erdbeobachtung
DLR - Research theme (Project):R - Vorhaben Flugzeug-SAR
Location: Oberpfaffenhofen
Institutes and Institutions:Microwaves and Radar Institute > SAR Technology
Deposited By: Rodriguez Cassola, Marc
Deposited On:08 Dec 2014 08:42
Last Modified:31 Jul 2019 19:49

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