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Contingency Mitigation Aspects for Reflector Based Satellite SAR Systems

Klenk, Patrick and Reimann, Jens and Huber, Sigurd and Schwerdt, Marco (2020) Contingency Mitigation Aspects for Reflector Based Satellite SAR Systems. In: 14th European Conference on Antennas and Propagation, EuCAP 2020. European Conference on Antennas and Propagation (EuCAP), 2020-03-15 - 2020-03-20, Copenhagen, Denmark. doi: 10.23919/EuCAP48036.2020.9136092. ISBN 978-883129900-8.

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Contingency mitigation, especially with respect to potential failures of Transmit-Receive Modules (TRMs) is a critical issue for SAR system concepts based upon planar phased array antenna fed large-deployable reflector (LDR) instruments. One promising approach is defocusing the LDR from the usually employed paraboloid shape. This opens a trade-space which has to be carefully investigated. Based on the current instrument and spacecraft geometry of Tandem-L we here assess the potential of reflector shaping to mitigate potential TRM failures. In particular we discuss the potential for re-optimization of the transmit pattern in such a contingency case. We find that for the defocused reflector, the impact of a potential TRM failure on the transmit pattern can be largely mitigated with acceptable impacts on nominal operations.

Item URL in elib:https://elib.dlr.de/129701/
Document Type:Conference or Workshop Item (Poster)
Title:Contingency Mitigation Aspects for Reflector Based Satellite SAR Systems
AuthorsInstitution or Email of AuthorsAuthor's ORCID iDORCID Put Code
Klenk, PatrickUNSPECIFIEDhttps://orcid.org/0000-0002-8284-2265UNSPECIFIED
Reimann, JensUNSPECIFIEDhttps://orcid.org/0000-0002-0650-9073UNSPECIFIED
Huber, SigurdUNSPECIFIEDhttps://orcid.org/0000-0001-7097-5127UNSPECIFIED
Schwerdt, MarcoUNSPECIFIEDhttps://orcid.org/0000-0002-0045-3726UNSPECIFIED
Date:March 2020
Journal or Publication Title:14th European Conference on Antennas and Propagation, EuCAP 2020
Refereed publication:Yes
Open Access:No
Gold Open Access:No
In ISI Web of Science:Yes
Keywords:antenna radiation patterns, instrument performance, digital beamforming, digital beamforming techniques, DBF, reflector shaping, defocused, antenna model, antenna pointing, contingency mitigation, feed failures, feed element failures, large-deployable reflector, LDR, MVDR, reflector antennas, mesh reflector antennas, Earth observation, Synthetic-Aperture Radar, SAR, spaceborne SAR, satellite SAR, Tandem-L
Event Title:European Conference on Antennas and Propagation (EuCAP)
Event Location:Copenhagen, Denmark
Event Type:international Conference
Event Dates:2020-03-15 - 2020-03-20
HGF - Research field:Aeronautics, Space and Transport
HGF - Program:Space
HGF - Program Themes:Earth Observation
DLR - Research area:Raumfahrt
DLR - Program:R EO - Earth Observation
DLR - Research theme (Project):R - Vorhaben Tandem-L Vorstudien (old)
Location: Oberpfaffenhofen
Institutes and Institutions:Microwaves and Radar Institute > Spaceborne SAR Systems
Deposited By: Klenk, Dr. Patrick
Deposited On:21 Oct 2019 11:30
Last Modified:19 Jul 2023 13:25

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