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A New Method to Improve the Detection of Co-Seismic Ionospheric Disturbances using Sequential Measurement Combination

Earthquakes generate energy that propagates into the ionosphere and incurs co-seismic ionospheric disturbances (CIDs), which can be observed in ionospheric delay measurements. In most cases, the CID has a weak signal strength, because the energy in the atmosphere transferred from the earthquake diss...

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Autores principales: Kang, Seonho, Song, Junesol, Han, Deokhwa, Kim, Bugyeom, So, Hyoungmin, Kim, Kap-jin, Kee, Changdon
Formato: Online Artículo Texto
Lenguaje:English
Publicado: MDPI 2019
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6651403/
https://www.ncbi.nlm.nih.gov/pubmed/31277404
http://dx.doi.org/10.3390/s19132948
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author Kang, Seonho
Song, Junesol
Han, Deokhwa
Kim, Bugyeom
So, Hyoungmin
Kim, Kap-jin
Kee, Changdon
author_facet Kang, Seonho
Song, Junesol
Han, Deokhwa
Kim, Bugyeom
So, Hyoungmin
Kim, Kap-jin
Kee, Changdon
author_sort Kang, Seonho
collection PubMed
description Earthquakes generate energy that propagates into the ionosphere and incurs co-seismic ionospheric disturbances (CIDs), which can be observed in ionospheric delay measurements. In most cases, the CID has a weak signal strength, because the energy in the atmosphere transferred from the earthquake dissipates as it travels toward the ionosphere. It is particularly hard to observe at reference stations that are located far from the epicenter. As the number of Global Navigation Satellite System stations and their positions are restricted, it is important to employ weak CID data in the analysis by improving the detection performance of CIDs. In this study, we suggest a new method of detecting CIDs, which mainly uses a sequential measurement combination of the carrier phase-based ionospheric delay data, with a 1-second interval. The proposed method’s performance was compared with conventional methods, including band-pass filters and a representative time-derivative method, using data from the 2011 Tohoku earthquake. As a result, the maximum CID-to-noise ratio can be increased by a maximum of 13% when the proposed method is used, and consequently, the detection performance of the CID can be improved.
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spelling pubmed-66514032019-08-08 A New Method to Improve the Detection of Co-Seismic Ionospheric Disturbances using Sequential Measurement Combination Kang, Seonho Song, Junesol Han, Deokhwa Kim, Bugyeom So, Hyoungmin Kim, Kap-jin Kee, Changdon Sensors (Basel) Article Earthquakes generate energy that propagates into the ionosphere and incurs co-seismic ionospheric disturbances (CIDs), which can be observed in ionospheric delay measurements. In most cases, the CID has a weak signal strength, because the energy in the atmosphere transferred from the earthquake dissipates as it travels toward the ionosphere. It is particularly hard to observe at reference stations that are located far from the epicenter. As the number of Global Navigation Satellite System stations and their positions are restricted, it is important to employ weak CID data in the analysis by improving the detection performance of CIDs. In this study, we suggest a new method of detecting CIDs, which mainly uses a sequential measurement combination of the carrier phase-based ionospheric delay data, with a 1-second interval. The proposed method’s performance was compared with conventional methods, including band-pass filters and a representative time-derivative method, using data from the 2011 Tohoku earthquake. As a result, the maximum CID-to-noise ratio can be increased by a maximum of 13% when the proposed method is used, and consequently, the detection performance of the CID can be improved. MDPI 2019-07-04 /pmc/articles/PMC6651403/ /pubmed/31277404 http://dx.doi.org/10.3390/s19132948 Text en © 2019 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
Kang, Seonho
Song, Junesol
Han, Deokhwa
Kim, Bugyeom
So, Hyoungmin
Kim, Kap-jin
Kee, Changdon
A New Method to Improve the Detection of Co-Seismic Ionospheric Disturbances using Sequential Measurement Combination
title A New Method to Improve the Detection of Co-Seismic Ionospheric Disturbances using Sequential Measurement Combination
title_full A New Method to Improve the Detection of Co-Seismic Ionospheric Disturbances using Sequential Measurement Combination
title_fullStr A New Method to Improve the Detection of Co-Seismic Ionospheric Disturbances using Sequential Measurement Combination
title_full_unstemmed A New Method to Improve the Detection of Co-Seismic Ionospheric Disturbances using Sequential Measurement Combination
title_short A New Method to Improve the Detection of Co-Seismic Ionospheric Disturbances using Sequential Measurement Combination
title_sort new method to improve the detection of co-seismic ionospheric disturbances using sequential measurement combination
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6651403/
https://www.ncbi.nlm.nih.gov/pubmed/31277404
http://dx.doi.org/10.3390/s19132948
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