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External Calibration of Multi-Channel SAR Sensors Based on the Pulse-by-Pulse Analysis of Range Compressed Data

Jäger, Marc and Scheiber, Rolf and Reigber, Andreas (2018) External Calibration of Multi-Channel SAR Sensors Based on the Pulse-by-Pulse Analysis of Range Compressed Data. In: Proceedings of the European Conference on Synthetic Aperture Radar, EUSAR. VDE. European Conference on Synthetic Aperture Radar (EUSAR), 2018-06-04 - 2018-06-07, Aachen, Germany. ISBN 9783800746361

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Abstract

The presented approach concerns a method for the accurate calibration of multi-channel SAR instruments, such as those required to support SAR polarimetry, single-pass interferometry and digital beam-forming, on the basis of dedicated SAR acquisitions containing reference targets with known properties. Unlike conventional approaches, the method is based entirely on the analysis of range-compressed raw data. It leverages the pulse-by-pulse analysis of amplitude, phase and delay variations observed within the range histories of reference targets to fully characterise and correct propagation direction dependent calibration issues. In addition, the approach does not require SAR image focussing in azimuth, which is essential in cases where azimuth focussing requires beam-forming techniques and thus presupposes an accurate calibration of the sensors' antenna array. The paper illustrates and validates the proposed approach using real multi-channel SAR data acquired by DLR's airborne F-SAR instrument.

Item URL in elib:https://elib.dlr.de/115351/
Document Type:Conference or Workshop Item (Speech)
Title:External Calibration of Multi-Channel SAR Sensors Based on the Pulse-by-Pulse Analysis of Range Compressed Data
Authors:
AuthorsInstitution or Email of AuthorsAuthors ORCID iD
Jäger, MarcMarc.Jaeger (at) dlr.deUNSPECIFIED
Scheiber, RolfRolf.Scheiber (at) dlr.dehttps://orcid.org/0000-0002-6833-4897
Reigber, AndreasAndreas.Reigber (at) dlr.deUNSPECIFIED
Date: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
Publisher:VDE
ISBN:9783800746361
Status:Published
Keywords:Synthetic Aperture Radar, External Calibration, SAR Polarimetry, SAR Interferometry, Digital Beam Forming
Event Title:European Conference on Synthetic Aperture Radar (EUSAR)
Event Location:Aachen, Germany
Event Type:international Conference
Event Dates:2018-06-04 - 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 - Vorhaben Flugzeug-SAR
Location: Oberpfaffenhofen
Institutes and Institutions:Microwaves and Radar Institute > SAR Technology
Deposited By: Jäger, Marc
Deposited On:20 Nov 2017 08:52
Last Modified:23 Jan 2019 10:27

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