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Digital Beamforming for Spaceborne Reflector - Based Synthetic Aperture Radar, Part 2: Ultra-Wide Swath Imaging Mode

Younis, Marwan und Queiroz de Almeida, Felipe und Villano, Michelangelo und Huber, Sigurd und Krieger, Gerhard und Moreira, Alberto (2022) Digital Beamforming for Spaceborne Reflector - Based Synthetic Aperture Radar, Part 2: Ultra-Wide Swath Imaging Mode. IEEE Geoscience and Remote Sensing Magazine (GRSM), 10 (4). IEEE - Institute of Electrical and Electronics Engineers. doi: 10.1109/MGRS.2022.3200871. ISSN 2168-6831.

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Offizielle URL: https://www.nxtbook.com/nxtbooks/ieee/geoscience_december2022/index.php#/p/10

Kurzfassung

Utilizing digital beamforming techniques in conjunction with the feed array of large deployable reflector antennas can boost the performance of synthetic aperture radar (SAR) systems. Multi-channel SAR overcomes the constraints of classical single-channel SAR allowing for wide-swath imaging at fine azimuth resolution. Part 1 of this tutorial provided an introduction to the instrument structure of a digital beamforming (DBF) imaging radar and the particularities/variants of its basic operation mode, known as single-beam scan-on-receive (SCORE), in which a time-variant high-gain receive beam is generated that follows the reflected echo traversing the ground. In its basic implementation, SCORE improves the signal-to-noise ratio and allows for the suppression of range ambiguities, but it does not allow for a substantial increase of the imaged swath width beyond a few tens of kilometers. Part 2 of the tutorial paper addresses the topic of ultra-wide swath imaging in the order of a few hundred kilometers, enabled through DBF. A detailed insight into simultaneous multiple sub-swath imaging is given; gaps (blind ranges) that occur in this operation mode are addressed; and the data streams management at the various on-board processing stages is explained, put in relation to the imaging mode, and expressions for the data rates are provided. A further beamforming topic seized in part 2 of this tutorial trilogy is the feed array excitation (complex weights) and the resulting primary and secondary radiation patterns. This is explained in the context of a reference reflector-feed antenna system providing numerous example cases aiming to foster the understanding of the topic.

elib-URL des Eintrags:https://elib.dlr.de/146764/
Dokumentart:Zeitschriftenbeitrag
Zusätzliche Informationen:Part 2 of a three part tutorial-like paper.
Titel:Digital Beamforming for Spaceborne Reflector - Based Synthetic Aperture Radar, Part 2: Ultra-Wide Swath Imaging Mode
Autoren:
AutorenInstitution oder E-Mail-AdresseAutoren-ORCID-iDORCID Put Code
Younis, Marwanmarwan.younis (at) dlr.dehttps://orcid.org/0000-0002-8563-7371NICHT SPEZIFIZIERT
Queiroz de Almeida, FelipeFelipe.QueirozdeAlmeida (at) dlr.dehttps://orcid.org/0000-0001-5929-6633NICHT SPEZIFIZIERT
Villano, MichelangeloMichelangelo.Villano (at) dlr.dehttps://orcid.org/0000-0002-1769-6927NICHT SPEZIFIZIERT
Huber, SigurdSigurd.Huber (at) dlr.dehttps://orcid.org/0000-0001-7097-5127NICHT SPEZIFIZIERT
Krieger, GerhardGerhard.Krieger (at) dlr.dehttps://orcid.org/0000-0002-4548-0285NICHT SPEZIFIZIERT
Moreira, AlbertoAlberto.Moreira (at) dlr.dehttps://orcid.org/0000-0002-3436-9653NICHT SPEZIFIZIERT
Datum:28 Oktober 2022
Erschienen in:IEEE Geoscience and Remote Sensing Magazine (GRSM)
Referierte Publikation:Ja
Open Access:Ja
Gold Open Access:Nein
In SCOPUS:Ja
In ISI Web of Science:Ja
Band:10
DOI:10.1109/MGRS.2022.3200871
Verlag:IEEE - Institute of Electrical and Electronics Engineers
ISSN:2168-6831
Status:veröffentlicht
Stichwörter:synthetic aperture radar (SAR), digital-beam forming, reflector-based SAR
HGF - Forschungsbereich:Luftfahrt, Raumfahrt und Verkehr
HGF - Programm:Raumfahrt
HGF - Programmthema:Erdbeobachtung
DLR - Schwerpunkt:Raumfahrt
DLR - Forschungsgebiet:R EO - Erdbeobachtung
DLR - Teilgebiet (Projekt, Vorhaben):R - SAR-Missionen
Standort: Oberpfaffenhofen
Institute & Einrichtungen:Institut für Hochfrequenztechnik und Radarsysteme > Radarkonzepte
Hinterlegt von: Younis, Dr.-Ing. Marwan
Hinterlegt am:05 Dez 2021 14:07
Letzte Änderung:26 Feb 2024 12:19

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