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Radiometric Degradation Associated with Terrain Height Variations and Pulse Duration in Scan-On-Receive SAR Images

Bordoni, Federica and Krieger, Gerhard and Lind, David (2022) Radiometric Degradation Associated with Terrain Height Variations and Pulse Duration in Scan-On-Receive SAR Images. IEEE Transactions on Geoscience and Remote Sensing, 60, pp. 1-14. IEEE - Institute of Electrical and Electronics Engineers. doi: 10.1109/TGRS.2022.3148907. ISSN 0196-2892.

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Abstract

Scan-on-receive (SCORE) is a key digital beamforming (DBF) technique for future high-resolution wide-swath spaceborne synthetic aperture radar (SAR) systems. Compared to a conventional approach, it allows to improve the signal-to-noise ratio and the range ambiguity suppression. Nevertheless, it also exposes the system to new errors, associated with terrain height variations and pulse duration. This work investigates the mutual effect of these error sources on the SCORE SAR image. A novel, closed, mathematical expression is derived, respectively, for the impulse response function of the image formation process and for the radiometric loss affecting the image pixels. This makes it possible to predict and quantify the effect of terrain height variations and pulse duration as a function of system, processing, and geometric parameters. The numerical results, based on the end-to-end simulation of the SAR image formation process in different operational scenarios, highlight the relevance of this effect and of the derived analytical description, especially in view of the demanding radiometric quality requirements imposed on future SAR images.

Item URL in elib:https://elib.dlr.de/148666/
Document Type:Article
Title:Radiometric Degradation Associated with Terrain Height Variations and Pulse Duration in Scan-On-Receive SAR Images
Authors:
AuthorsInstitution or Email of AuthorsAuthor's ORCID iD
Bordoni, FedericaFederica.Bordoni (at) dlr.dehttps://orcid.org/0000-0001-9908-8775
Krieger, GerhardGerhard.Krieger (at) dlr.dehttps://orcid.org/0000-0002-4548-0285
Lind, DavidUNSPECIFIEDUNSPECIFIED
Date:4 February 2022
Journal or Publication Title:IEEE Transactions on Geoscience and Remote Sensing
Refereed publication:Yes
Open Access:Yes
Gold Open Access:No
In SCOPUS:Yes
In ISI Web of Science:Yes
Volume:60
DOI:10.1109/TGRS.2022.3148907
Page Range:pp. 1-14
Publisher:IEEE - Institute of Electrical and Electronics Engineers
ISSN:0196-2892
Status:Published
Keywords:Synthetic Aperture Radar (SAR), Digital Beam-Forming (DBF), SCan-On-REceive (SCORE)
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 - Development of a mini-SAR
Location: Oberpfaffenhofen
Institutes and Institutions:Microwaves and Radar Institute > Radar Concepts
Microwaves and Radar Institute
Deposited By: Bordoni, Dr. Federica
Deposited On:07 Feb 2022 07:59
Last Modified:13 Jan 2023 16:42

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