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Adaptive Smoothness Constraint Ionospheric Tomography Algorithm
Ionospheric tomography reconstruction based on global navigation satellite system observations is usually an ill-posed problem. To resolve it, an adaptive smoothness constraint ionospheric tomography algorithm is proposed in this work. The new algorithm performs an adaptive adjustment for the constr...
Autores principales: | , , |
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Formato: | Online Artículo Texto |
Lenguaje: | English |
Publicado: |
MDPI
2020
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Materias: | |
Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7219507/ https://www.ncbi.nlm.nih.gov/pubmed/32340257 http://dx.doi.org/10.3390/s20082404 |
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author | Wen, Debao Mei, Dengkui Du, Yanan |
author_facet | Wen, Debao Mei, Dengkui Du, Yanan |
author_sort | Wen, Debao |
collection | PubMed |
description | Ionospheric tomography reconstruction based on global navigation satellite system observations is usually an ill-posed problem. To resolve it, an adaptive smoothness constraint ionospheric tomography algorithm is proposed in this work. The new algorithm performs an adaptive adjustment for the constrained weight coefficients of the tomography system. The computational efficiency and the reconstructed quality of ionospheric imaging are improved by using the new algorithm. A numerical simulation experiment was conducted in order to validate the feasibility and superiority of the algorithm. The statistical results of the reconstructed errors and the comparisons of ionospheric profiles confirmed the superiority of the new algorithm. Finally, the new algorithm was successfully applied to reconstruct three-dimensional ionospheric images under geomagnetic quiet and geomagnetic disturbance conditions over Hunan province. The tomographic results are reasonable and consistent with the general behavior of the ionosphere. The positive and negative phase storm effects are found during geomagnetic storm occurrence. |
format | Online Article Text |
id | pubmed-7219507 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2020 |
publisher | MDPI |
record_format | MEDLINE/PubMed |
spelling | pubmed-72195072020-05-22 Adaptive Smoothness Constraint Ionospheric Tomography Algorithm Wen, Debao Mei, Dengkui Du, Yanan Sensors (Basel) Article Ionospheric tomography reconstruction based on global navigation satellite system observations is usually an ill-posed problem. To resolve it, an adaptive smoothness constraint ionospheric tomography algorithm is proposed in this work. The new algorithm performs an adaptive adjustment for the constrained weight coefficients of the tomography system. The computational efficiency and the reconstructed quality of ionospheric imaging are improved by using the new algorithm. A numerical simulation experiment was conducted in order to validate the feasibility and superiority of the algorithm. The statistical results of the reconstructed errors and the comparisons of ionospheric profiles confirmed the superiority of the new algorithm. Finally, the new algorithm was successfully applied to reconstruct three-dimensional ionospheric images under geomagnetic quiet and geomagnetic disturbance conditions over Hunan province. The tomographic results are reasonable and consistent with the general behavior of the ionosphere. The positive and negative phase storm effects are found during geomagnetic storm occurrence. MDPI 2020-04-23 /pmc/articles/PMC7219507/ /pubmed/32340257 http://dx.doi.org/10.3390/s20082404 Text en © 2020 by the authors. Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (http://creativecommons.org/licenses/by/4.0/). |
spellingShingle | Article Wen, Debao Mei, Dengkui Du, Yanan Adaptive Smoothness Constraint Ionospheric Tomography Algorithm |
title | Adaptive Smoothness Constraint Ionospheric Tomography Algorithm |
title_full | Adaptive Smoothness Constraint Ionospheric Tomography Algorithm |
title_fullStr | Adaptive Smoothness Constraint Ionospheric Tomography Algorithm |
title_full_unstemmed | Adaptive Smoothness Constraint Ionospheric Tomography Algorithm |
title_short | Adaptive Smoothness Constraint Ionospheric Tomography Algorithm |
title_sort | adaptive smoothness constraint ionospheric tomography algorithm |
topic | Article |
url | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7219507/ https://www.ncbi.nlm.nih.gov/pubmed/32340257 http://dx.doi.org/10.3390/s20082404 |
work_keys_str_mv | AT wendebao adaptivesmoothnessconstraintionospherictomographyalgorithm AT meidengkui adaptivesmoothnessconstraintionospherictomographyalgorithm AT duyanan adaptivesmoothnessconstraintionospherictomographyalgorithm |