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Absolute Radiometric Calibration of Broadband X-Band Transponders

Raab, Sebastian and Schmidt, Kersten and Weidenhaupt, Klaus Frank and Reimann, Jens and Büchner, Anna Maria and Schwerdt, Marco (2021) Absolute Radiometric Calibration of Broadband X-Band Transponders. In: Proceedings of the European Conference on Synthetic Aperture Radar, EUSAR. European Conference on Synthetic Aperture Radar (EUSAR), 2021-03-29 - 2021-04-01, Leipzig, Germany.

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Abstract

Spaceborne synthetic aperture radar (SAR) systems are often used for earth observation capable for acquiring accurate high-resolution data. In order to ensure the quality of these SAR data, the SAR system has to be calibrated first. For this purpose active targets with well-known backscatter properties, called transponders, serve as an external reference. The enhancement of the operational bandwidth up to 1.2 GHz of future civil SAR systems requires the development of appropriate broadband transponders and their accurate calibration. In order to be well prepared for these missions, DLR has been developed a broadband X-Band transponder and an innovative technique for the frequency-dependent determination of the transponder’s radar cross section (RCS) which promises an accurate measurement over the full transponder bandwidth. In this paper the calibration of a broadband transponder according to this new approach is described including the analysis of corresponding measurements. The derived results are verified with a second independent calibration method and finally evaluated.

Item URL in elib:https://elib.dlr.de/133963/
Document Type:Conference or Workshop Item (Speech)
Title:Absolute Radiometric Calibration of Broadband X-Band Transponders
Authors:
AuthorsInstitution or Email of AuthorsAuthor's ORCID iD
Raab, SebastianSebastian.Raab (at) dlr.dehttps://orcid.org/0000-0003-4902-5551
Schmidt, KerstenKersten.Schmidt (at) dlr.dehttps://orcid.org/0000-0001-7896-908X
Weidenhaupt, Klaus FrankKlaus.Weidenhaupt (at) dlr.dehttps://orcid.org/0000-0003-2160-8018
Reimann, Jensjens.reimann (at) dlr.dehttps://orcid.org/0000-0002-0650-9073
Büchner, Anna MariaAnna.Buechner (at) dlr.deUNSPECIFIED
Schwerdt, MarcoMarco.Schwerdt (at) dlr.dehttps://orcid.org/0000-0002-0045-3726
Date:April 2021
Journal or Publication Title:Proceedings of the European Conference on Synthetic Aperture Radar, EUSAR
Refereed publication:Yes
Open Access:Yes
Gold Open Access:No
In SCOPUS:Yes
In ISI Web of Science:No
Status:Published
Keywords:SAR, Transponder, Calibration, Three-Transponder-Method, 3TM, Reference target,
Event Title:European Conference on Synthetic Aperture Radar (EUSAR)
Event Location:Leipzig, Germany
Event Type:international Conference
Event Dates:2021-03-29 - 2021-04-01
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 - Earth Observation
DLR - Research theme (Project):R - SAR missions
Location: Oberpfaffenhofen
Institutes and Institutions:Microwaves and Radar Institute
Deposited By: Raab, M. Eng. Sebastian
Deposited On:03 Feb 2020 07:58
Last Modified:06 Apr 2021 11:15

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