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Impacts of Expectable Large Deployable Reflector Deformations on Digital Beamforming

Klenk, Patrick and Reimann, Jens and Schwerdt, Marco (2018) Impacts of Expectable Large Deployable Reflector Deformations on Digital Beamforming. In: Proceedings of the European Conference on Synthetic Aperture Radar, EUSAR, pp. 1070-1073. European Conference on Synthetic Aperture Radar (EUSAR), 2018-06-05 - 2018-06-07, Aachen, Germany. ISBN 978-3-8007-4636-1 ISSN 2197-4403

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Official URL: https://ieeexplore.ieee.org/abstract/document/8438176

Abstract

Upcoming radar missions for Earth observation focus on longer wavelengths in L- or even P-band. Operationally, these instruments will be constructed as an antenna feed array paired with large deployable reflectors (LDR) to achieve highly versatile instruments and high-gain antenna beams at realizable cost. Compared to current planar array based systems, these upcoming missions face a slew of novel challenges. One major concern is the impact of potential LDR distortions at different timescales on receive beams, calculated based on digital beamforming techniques. In this paper, we discuss the impacts of expected LDR surface distortions on maximum beam gain and beam pointing based upon a potential Tandem-L instrument geometry for a legacy LDR with a diameter of 12 m. We find that deployment uncertainties have a notable effect, while inter-orbit thermal distortions may not noticeably influence gain and pointing of the calculated receive beams.

Item URL in elib:https://elib.dlr.de/119717/
Document Type:Conference or Workshop Item (Poster)
Title:Impacts of Expectable Large Deployable Reflector Deformations on Digital Beamforming
Authors:
AuthorsInstitution or Email of AuthorsAuthors ORCID iD
Klenk, PatrickPatrick.Klenk (at) dlr.deUNSPECIFIED
Reimann, Jensjens.reimann (at) dlr.dehttps://orcid.org/0000-0002-0650-9073
Schwerdt, MarcoMarco.Schwerdt (at) dlr.dehttps://orcid.org/0000-0002-0045-3726
Date:1 June 2018
Journal or Publication Title:Proceedings of the European Conference on Synthetic Aperture Radar, EUSAR
Refereed publication:Yes
Open Access:No
Gold Open Access:No
In SCOPUS:Yes
In ISI Web of Science:No
Page Range:pp. 1070-1073
ISSN:2197-4403
ISBN:978-3-8007-4636-1
Status:Published
Keywords:Large-Deployable Reflector, LDR, Digital Beamforming, DBF, Tandem-L, TDL, antenna model, future SAR missions, calibration, pointing, antenna pointing, LDR distortion, simulation
Event Title:European Conference on Synthetic Aperture Radar (EUSAR)
Event Location:Aachen, Germany
Event Type:international Conference
Event Dates:2018-06-05 - 2018-06-07
Organizer:VDE
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 - SAR-Missions
Location: Oberpfaffenhofen
Institutes and Institutions:Microwaves and Radar Institute > Spaceborne SAR Systems
Deposited By: Klenk, Dr. Patrick
Deposited On:23 Apr 2018 09:16
Last Modified:05 Nov 2018 15:29

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