Interferometric Imaging with EISCAT_3D for Fine-Scale In-Beam Incoherent Scatter Spectra Measurements

The 233 MHz EISCAT_3D radar system currently under construction in northern Fennoscandia will be able to resolve ionospheric structures smaller than the transmit beam dimensions through the use of interferometric imaging. This capability is made possible by the modular design and digitisation of the...

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Main Authors: Huyghebaert, Devin, Gustavsson, Björn, Vierinen, Juha, Kvammen, Andreas, Zettergren, Matthew, Swoboda, John, Virtanen, Ilkka, Hatch, Spencer, Laundal, Karl M.
Format: Article in Journal/Newspaper
Language:English
Published: Copernicus Publications 2024
Subjects:
Online Access:https://doi.org/10.5194/egusphere-2024-802
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spelling ftnonlinearchiv:oai:noa.gwlb.de:cop_mods_00072580 2024-04-28T08:18:36+00:00 Interferometric Imaging with EISCAT_3D for Fine-Scale In-Beam Incoherent Scatter Spectra Measurements Huyghebaert, Devin Gustavsson, Björn Vierinen, Juha Kvammen, Andreas Zettergren, Matthew Swoboda, John Virtanen, Ilkka Hatch, Spencer Laundal, Karl M. 2024-03 electronic https://doi.org/10.5194/egusphere-2024-802 https://noa.gwlb.de/receive/cop_mods_00072580 https://noa.gwlb.de/servlets/MCRFileNodeServlet/cop_derivate_00070785/egusphere-2024-802.pdf https://egusphere.copernicus.org/preprints/2024/egusphere-2024-802/egusphere-2024-802.pdf eng eng Copernicus Publications https://doi.org/10.5194/egusphere-2024-802 https://noa.gwlb.de/receive/cop_mods_00072580 https://noa.gwlb.de/servlets/MCRFileNodeServlet/cop_derivate_00070785/egusphere-2024-802.pdf https://egusphere.copernicus.org/preprints/2024/egusphere-2024-802/egusphere-2024-802.pdf https://creativecommons.org/licenses/by/4.0/ uneingeschränkt info:eu-repo/semantics/openAccess article Verlagsveröffentlichung article Text doc-type:article 2024 ftnonlinearchiv https://doi.org/10.5194/egusphere-2024-802 2024-04-02T16:51:04Z The 233 MHz EISCAT_3D radar system currently under construction in northern Fennoscandia will be able to resolve ionospheric structures smaller than the transmit beam dimensions through the use of interferometric imaging. This capability is made possible by the modular design and digitisation of the 119 91-antenna panels located at the main Skibotn site. The main array consists of a cluster of 109 panels, with 10 outlier panels producing unique interferometry baselines. In the present study synthesized incoherent scatter radar signal measurements are used for interferometric imaging analysis with the EISCAT_3D system. The Geospace Environment Model of Ion-Neutral Interactions (GEMINI) model is used to simulate a Kelvin-Helmholtz instability in the cusp region at 50 m resolution to obtain plasma parameters which are then used to generate the synthetic data. The ionospheric data is forward propagated to the EISCAT_3D array, noise is added to the synthetic data, and then an inversion of the data is performed to reconstruct the incoherent scatter spectra at relatively fine scales. By using Singular Value Decomposition (SVD) with Tikhonov regularization it is possible to pre-calculate the inversion matrix for a given range and look direction, with the regularization value scaled based on the SNR. The pre-calculation of the inversion matrix can reduce computational overhead in the imaging solution. This study provides a framework for data processing of ion-line incoherent scatter radar spectra to be imaged on fine-scales. Furthermore, with more development it can be used to test experimental set-ups and to design experiments for EISCAT_3D by investigating the needed integration time for various signal-to-noise ratios, beam patterns and ionospheric conditions. Article in Journal/Newspaper Fennoscandia Skibotn Niedersächsisches Online-Archiv NOA
institution Open Polar
collection Niedersächsisches Online-Archiv NOA
op_collection_id ftnonlinearchiv
language English
topic article
Verlagsveröffentlichung
spellingShingle article
Verlagsveröffentlichung
Huyghebaert, Devin
Gustavsson, Björn
Vierinen, Juha
Kvammen, Andreas
Zettergren, Matthew
Swoboda, John
Virtanen, Ilkka
Hatch, Spencer
Laundal, Karl M.
Interferometric Imaging with EISCAT_3D for Fine-Scale In-Beam Incoherent Scatter Spectra Measurements
topic_facet article
Verlagsveröffentlichung
description The 233 MHz EISCAT_3D radar system currently under construction in northern Fennoscandia will be able to resolve ionospheric structures smaller than the transmit beam dimensions through the use of interferometric imaging. This capability is made possible by the modular design and digitisation of the 119 91-antenna panels located at the main Skibotn site. The main array consists of a cluster of 109 panels, with 10 outlier panels producing unique interferometry baselines. In the present study synthesized incoherent scatter radar signal measurements are used for interferometric imaging analysis with the EISCAT_3D system. The Geospace Environment Model of Ion-Neutral Interactions (GEMINI) model is used to simulate a Kelvin-Helmholtz instability in the cusp region at 50 m resolution to obtain plasma parameters which are then used to generate the synthetic data. The ionospheric data is forward propagated to the EISCAT_3D array, noise is added to the synthetic data, and then an inversion of the data is performed to reconstruct the incoherent scatter spectra at relatively fine scales. By using Singular Value Decomposition (SVD) with Tikhonov regularization it is possible to pre-calculate the inversion matrix for a given range and look direction, with the regularization value scaled based on the SNR. The pre-calculation of the inversion matrix can reduce computational overhead in the imaging solution. This study provides a framework for data processing of ion-line incoherent scatter radar spectra to be imaged on fine-scales. Furthermore, with more development it can be used to test experimental set-ups and to design experiments for EISCAT_3D by investigating the needed integration time for various signal-to-noise ratios, beam patterns and ionospheric conditions.
format Article in Journal/Newspaper
author Huyghebaert, Devin
Gustavsson, Björn
Vierinen, Juha
Kvammen, Andreas
Zettergren, Matthew
Swoboda, John
Virtanen, Ilkka
Hatch, Spencer
Laundal, Karl M.
author_facet Huyghebaert, Devin
Gustavsson, Björn
Vierinen, Juha
Kvammen, Andreas
Zettergren, Matthew
Swoboda, John
Virtanen, Ilkka
Hatch, Spencer
Laundal, Karl M.
author_sort Huyghebaert, Devin
title Interferometric Imaging with EISCAT_3D for Fine-Scale In-Beam Incoherent Scatter Spectra Measurements
title_short Interferometric Imaging with EISCAT_3D for Fine-Scale In-Beam Incoherent Scatter Spectra Measurements
title_full Interferometric Imaging with EISCAT_3D for Fine-Scale In-Beam Incoherent Scatter Spectra Measurements
title_fullStr Interferometric Imaging with EISCAT_3D for Fine-Scale In-Beam Incoherent Scatter Spectra Measurements
title_full_unstemmed Interferometric Imaging with EISCAT_3D for Fine-Scale In-Beam Incoherent Scatter Spectra Measurements
title_sort interferometric imaging with eiscat_3d for fine-scale in-beam incoherent scatter spectra measurements
publisher Copernicus Publications
publishDate 2024
url https://doi.org/10.5194/egusphere-2024-802
https://noa.gwlb.de/receive/cop_mods_00072580
https://noa.gwlb.de/servlets/MCRFileNodeServlet/cop_derivate_00070785/egusphere-2024-802.pdf
https://egusphere.copernicus.org/preprints/2024/egusphere-2024-802/egusphere-2024-802.pdf
genre Fennoscandia
Skibotn
genre_facet Fennoscandia
Skibotn
op_relation https://doi.org/10.5194/egusphere-2024-802
https://noa.gwlb.de/receive/cop_mods_00072580
https://noa.gwlb.de/servlets/MCRFileNodeServlet/cop_derivate_00070785/egusphere-2024-802.pdf
https://egusphere.copernicus.org/preprints/2024/egusphere-2024-802/egusphere-2024-802.pdf
op_rights https://creativecommons.org/licenses/by/4.0/
uneingeschränkt
info:eu-repo/semantics/openAccess
op_doi https://doi.org/10.5194/egusphere-2024-802
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