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TOPS Imaging with TerraSAR-X: Mode Design and Performance Analysis

Meta, Adriano and Mittermayer, Josef and Prats, Pau and Scheiber, Rolf and Steinbrecher, Ulrich (2010) TOPS Imaging with TerraSAR-X: Mode Design and Performance Analysis. IEEE Transactions on Geoscience and Remote Sensing, 48 (2), pp. 759-769. IEEE. DOI: 10.1109/TGRS.2009.2026743.

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This paper reports about the performed investigations for the implementation of the wide swath TOPS imaging mode with TerraSAR-X. The TOPS mode overcomes the limitations imposed by the ScanSAR mode by steering the antenna along-track during the acquisition of a burst. In this way, a uniform signal to noise ratio (SNR) is achieved, and consequently, scalloping and an azimuth-dependent distributed target ambiguity ratio (DTAR) are avoided. However, the use of electronically steered antennas leads to a quantization of the steering law and a non-ideal pattern for squinted angles (grating lobes and main lobe reduction). The former provokes spurious peaks, while the latter introduces a slight scalloping and DTAR deterioration. These effects are analyzed and quantified for TerraSAR-X and a TOPS system design approach is presented. Next, the requirements concerning interferometry are investigated. Finally, several results are shown with TerraSAR-X data, including a comparison between the TOPS and ScanSAR modes and the reporting of first TOPS interferometric results.

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:TOPS Imaging with TerraSAR-X: Mode Design and Performance Analysis
AuthorsInstitution or Email of Authors
Mittermayer, JosefUNSPECIFIED
Steinbrecher, UlrichUNSPECIFIED
Date:2 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. 759-769
Series Name:IEEE Transactions on Geoscience and Remote Sensing
Keywords:ScanSAR, synthetic aperture radar (SAR), terrain observation by progressive scans (TOPS), wide swath SAR
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 - Projekt TerraSAR-X Kalibration und Projektunterstützung (old)
Location: Oberpfaffenhofen
Institutes and Institutions:Microwaves and Radar Institute > Radar Concepts
Microwaves and Radar Institute
Microwaves and Radar Institute > Spaceborne SAR Systems
Microwaves and Radar Institute > SAR Technology
Deposited By: Dr.-Ing. Josef Mittermayer
Deposited On:02 Feb 2010 09:28
Last Modified:12 Dec 2013 20:37

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