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Staggered SAR: High-Resolution Wide-Swath Imaging by Continuous PRI Variation

Villano, Michelangelo and Krieger, Gerhard and Moreira, Alberto (2014) Staggered SAR: High-Resolution Wide-Swath Imaging by Continuous PRI Variation. IEEE Transactions on Geoscience and Remote Sensing, 52 (7), pp. 4462-4479. IEEE - Institute of Electrical and Electronics Engineers. DOI: 10.1109/TGRS.2013.2282192 ISSN 0196-2892

Full text not available from this repository.

Official URL: http://ieeexplore.ieee.org/arnumber=6651848

Abstract

Synthetic aperture radar (SAR) is a remote sensing technique, capable of providing high-resolution images independent of weather conditions and sunlight illumination. This makes SAR very attractive for the systematic observation of dynamic processes on the Earth’s surface. However, conventional SAR systems are limited, in that a wide swath can only be achieved at the expense of a degraded azimuth resolution. This limitation can be overcome by using systems with multiple receive apertures, displaced in along-track, but a very long antenna is required to map a wide swath. If a relatively short antenna with a single aperture in along-track is available, it is still possible to map a wide area: Multiple swaths can be, in fact, simultaneously imaged using digital beamforming in elevation, but “blind ranges” are present between adjacent swaths. This paper considers an innovative concept, Staggered SAR, where the pulse repetition interval (PRI) is continuously varied. This concept allows the imaging of a wide continuous swath without the need for a long antenna with multiple apertures. The choice of the sequence of PRIs and the pre-processing of the raw data are discussed in detail, showing how Staggered SAR is even less affected by ambiguities of point-like or extended targets with respect to a system with constant PRI, which simultaneously maps multiple swaths. Some system design examples are finally presented and compared.

Item URL in elib:https://elib.dlr.de/84310/
Document Type:Article
Title:Staggered SAR: High-Resolution Wide-Swath Imaging by Continuous PRI Variation
Authors:
AuthorsInstitution or Email of AuthorsAuthors ORCID iD
Villano, MichelangeloUNSPECIFIEDUNSPECIFIED
Krieger, GerhardUNSPECIFIEDUNSPECIFIED
Moreira, AlbertoUNSPECIFIEDUNSPECIFIED
Date:July 2014
Journal or Publication Title:IEEE Transactions on Geoscience and Remote Sensing
Refereed publication:Yes
Open Access:No
Gold Open Access:No
In SCOPUS:Yes
In ISI Web of Science:Yes
Volume:52
DOI :10.1109/TGRS.2013.2282192
Page Range:pp. 4462-4479
Publisher:IEEE - Institute of Electrical and Electronics Engineers
ISSN:0196-2892
Status:Published
Keywords:Synthetic Aperture Radar (SAR), High-Resolution Wide-Swath (HRWS) imaging, PRI variation.
HGF - Research field:Aeronautics, Space and Transport
HGF - Program:Transport
HGF - Program Themes:Traffic Management (old)
DLR - Research area:Transport
DLR - Program:V VM - Verkehrsmanagement
DLR - Research theme (Project):V - Vabene++ (old), R - Vorhaben Tandem-L Vorstudien
Location: Oberpfaffenhofen
Institutes and Institutions:Microwaves and Radar Institute
Microwaves and Radar Institute > Radar Concepts
Deposited By: Villano, Dr.-Ing. Michelangelo
Deposited On:18 Sep 2013 11:50
Last Modified:08 Mar 2018 18:34

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