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Processing of Sliding Spotlight and TOPS SAR Data Using Baseband Azimuth Scaling

Prats, Pau and Scheiber, Rolf and Mittermayer, Josef and Meta, Adriano and Moreira, Alberto (2010) Processing of Sliding Spotlight and TOPS SAR Data Using Baseband Azimuth Scaling. IEEE Transactions on Geoscience and Remote Sensing, 48 (2), pp. 770-780. IEEE. DOI: 10.1109/TGRS.2009.2027701.

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This paper presents an efficient phase preserving processor for the focusing of data acquired in sliding spotlight and TOPS (Terrain Observation by Progressive Scans) imaging modes. They share in common a linear variation of the Doppler centroid along the azimuth dimension, which is due to a steering of the antenna (either mechanically or electronically) throughout the data take. Existing approaches for the azimuth processing can become inefficient due to the additional processing to overcome the folding in the focused domain. In this paper a new azimuth scaling approach is presented to perform the azimuth processing, whose kernel is exactly the same for sliding spotlight and TOPS modes. The possibility to use the proposed approach to process ScanSAR data, as well as a discussion concerning staring spotlight, are also included. Simulations with point-targets and real data acquired by TerraSAR-X in sliding spotlight and TOPS modes are used to validate the developed algorithm.

Document Type:Article
Additional Information:�©2010 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:Processing of Sliding Spotlight and TOPS SAR Data Using Baseband Azimuth Scaling
AuthorsInstitution or Email of Authors
Mittermayer, JosefUNSPECIFIED
Moreira, AlbertoUNSPECIFIED
Date:February 2010
Journal or Publication Title:IEEE Transactions on Geoscience and Remote Sensing
Refereed publication:Yes
In Open Access:No
In ISI Web of Science:Yes
Page Range:pp. 770-780
Keywords:synthetic aperture radar (SAR), SAR processing, azimuth scaling, ScanSAR, spotlight, terrain observation by progressive scans (TOPS)
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 > Radar Concepts
Microwaves and Radar Institute > SAR Technology
Deposited By: Dr. Pau Prats
Deposited On:14 Jul 2009 10:52
Last Modified:12 Dec 2013 20:39

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