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Robust, Model-Based External Calibration of Multi-Channel Airborne SAR Sensors using Range Compressed Raw Data

Jäger, Marc and Scheiber, Rolf and Reigber, Andreas (2019) Robust, Model-Based External Calibration of Multi-Channel Airborne SAR Sensors using Range Compressed Raw Data. Remote Sensing, 11 (22), pp. 1-28. Multidisciplinary Digital Publishing Institute (MDPI). DOI: 10.3390/rs11222674 ISSN 2072-4292

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Official URL: https://www.mdpi.com/2072-4292/11/22/2674

Abstract

The paper describes 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 (DBF), 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 characterize and correct propagation direction dependent calibration issues such as those related to antenna pointing or antenna phase center positions. The fact that the approach does not require SAR image focusing in azimuth is especially relevant in the context of DBF, where individual channels need to be calibrated but are, by themselves, under-sampled. The calibration techniques presented are illustrated and validated using multi-channel polarimetric and single-pass interferometric SAR data acquired by DLR's airborne F-SAR and DBFSAR instruments.

Item URL in elib:https://elib.dlr.de/130408/
Document Type:Article
Title:Robust, Model-Based External Calibration of Multi-Channel Airborne SAR Sensors using Range Compressed Raw Data
Authors:
AuthorsInstitution or Email of AuthorsAuthors ORCID iD
Jäger, MarcMarc.Jaeger (at) dlr.dehttps://orcid.org/0000-0001-9685-2977
Scheiber, RolfRolf.Scheiber (at) dlr.dehttps://orcid.org/0000-0002-6833-4897
Reigber, AndreasAndreas.Reigber (at) dlr.dehttps://orcid.org/0000-0002-2118-5046
Date:15 November 2019
Journal or Publication Title:Remote Sensing
Refereed publication:Yes
Open Access:Yes
Gold Open Access:Yes
In SCOPUS:Yes
In ISI Web of Science:Yes
Volume:11
DOI :10.3390/rs11222674
Page Range:pp. 1-28
Editors:
EditorsEmail
UNSPECIFIEDMultidisciplinary Digital Publishing Institute (MDPI)
Publisher:Multidisciplinary Digital Publishing Institute (MDPI)
Series Name:Airborne SAR: Data Processing, Calibration and Applications
ISSN:2072-4292
Status:Published
Keywords:synthetic aperture radar; external calibration; sar polarimetry; sar interferometry; digital beam-forming; baseline calibration; geometric calibration; antenna pointing
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:12 Nov 2019 15:59
Last Modified:14 Dec 2019 04:27

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