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Multichannel Staggered SAR Azimuth Processing

Queiroz de Almeida, Felipe and Younis, Marwan and Krieger, Gerhard and Moreira, Alberto (2018) Multichannel Staggered SAR Azimuth Processing. IEEE Transactions on Geoscience and Remote Sensing, 56 (5), pp. 2772-2788. IEEE - Institute of Electrical and Electronics Engineers. DOI: 10.1109/TGRS.2017.2783444 ISSN 0196-2892

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Official URL: https://ieeexplore.ieee.org/stamp/stamp.jsp?tp=&arnumber=8262665

Abstract

State-of-the-art and future spaceborne SAR systems increasingly often face the requirement of providing high-resolution images with reduced revisit times, requiring coverage of wide swaths. Since these are contradicting drivers in terms of system design, different alternatives for High-Resolution Wide Swath (HRWS) SAR imaging have been investigated, relying on digital beamforming (DBF) and the use of multiple receiver channels, both in elevation and azimuth dimensions. In this context, Staggered SAR, which operates with a pulse repetition frequency variation, using a single channel in azimuth proves itself as a promising alternative for covering wide continuous swaths with moderate azimuth resolution, whereas the use of multiple azimuth receiver channels bears the potential of improving the azimuth resolution over a given swath, but has yet only been applied to systems with a fixed pulse repetition frequency. This paper introduces and analyzes in detail processing techniques suitable for the combination of these techniques, leading to novel multichannel Staggered SAR imaging modes with the potential for very fine azimuth resolution over ultra-wide swaths. A system concept with 2.0 m azimuth resolution over a 400 km swath in quad-pol is provided as an example.

Item URL in elib:https://elib.dlr.de/116585/
Document Type:Article
Title:Multichannel Staggered SAR Azimuth Processing
Authors:
AuthorsInstitution or Email of AuthorsAuthors ORCID iD
Queiroz de Almeida, FelipeFelipe.QueirozdeAlmeida (at) dlr.dehttps://orcid.org/0000-0001-5929-6633
Younis, Marwanmarwan.younis (at) dlr.dehttps://orcid.org/0000-0002-8563-7371
Krieger, GerhardGerhard.Krieger (at) dlr.dehttps://orcid.org/0000-0002-4548-0285
Moreira, AlbertoAlberto.Moreira (at) dlr.dehttps://orcid.org/0000-0002-3436-9653
Date:May 2018
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:56
DOI :10.1109/TGRS.2017.2783444
Page Range:pp. 2772-2788
Publisher:IEEE - Institute of Electrical and Electronics Engineers
Series Name:IEEE Transactions on Geoscience and Remote Sensing
ISSN:0196-2892
Status:Published
Keywords:Radar, Radar imaging, Spaceborne radar, Synthetic aperture radar, Digital beamforming, High resolution wide swath
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 Tandem-L Vorstudien
Location: Oberpfaffenhofen
Institutes and Institutions:Microwaves and Radar Institute > Radar Concepts
Deposited By: Queiroz de Almeida, Felipe
Deposited On:07 Dec 2017 08:26
Last Modified:31 Jul 2019 20:14

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