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Ionospheric Correction Based on Ingestion of Global Ionospheric Maps into the NeQuick 2 Model

The global ionospheric maps (GIMs), generated by Jet Propulsion Laboratory (JPL) and Center for Orbit Determination in Europe (CODE) during a period over 13 years, have been adopted as the primary source of data to provide global ionospheric correction for possible single frequency positioning appli...

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Autores principales: Yu, Xiao, She, Chengli, Zhen, Weimin, Bruno, Nava, Liu, Dun, Yue, Xinan, Ou, Ming, Xu, Jisheng
Formato: Online Artículo Texto
Lenguaje:English
Publicado: Hindawi Publishing Corporation 2015
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4359864/
https://www.ncbi.nlm.nih.gov/pubmed/25815369
http://dx.doi.org/10.1155/2015/376702
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author Yu, Xiao
She, Chengli
Zhen, Weimin
Bruno, Nava
Liu, Dun
Yue, Xinan
Ou, Ming
Xu, Jisheng
author_facet Yu, Xiao
She, Chengli
Zhen, Weimin
Bruno, Nava
Liu, Dun
Yue, Xinan
Ou, Ming
Xu, Jisheng
author_sort Yu, Xiao
collection PubMed
description The global ionospheric maps (GIMs), generated by Jet Propulsion Laboratory (JPL) and Center for Orbit Determination in Europe (CODE) during a period over 13 years, have been adopted as the primary source of data to provide global ionospheric correction for possible single frequency positioning applications. The investigation aims to assess the performance of new NeQuick model, NeQuick 2, in predicting global total electron content (TEC) through ingesting the GIMs data from the previous day(s). The results show good performance of the GIMs-driven-NeQuick model with average 86% of vertical TEC error less than 10 TECU, when the global daily effective ionization indices (Az) versus modified dip latitude (MODIP) are constructed as a second order polynomial. The performance of GIMs-driven-NeQuick model presents variability with solar activity and behaves better during low solar activity years. The accuracy of TEC prediction can be improved further through performing a four-coefficient function expression of Az versus MODIP. As more measurements from earlier days are involved in the Az optimization procedure, the accuracy may decrease. The results also reveal that more efforts are needed to improve the NeQuick 2 model capabilities to represent the ionosphere in the equatorial and high-latitude regions.
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spelling pubmed-43598642015-03-26 Ionospheric Correction Based on Ingestion of Global Ionospheric Maps into the NeQuick 2 Model Yu, Xiao She, Chengli Zhen, Weimin Bruno, Nava Liu, Dun Yue, Xinan Ou, Ming Xu, Jisheng ScientificWorldJournal Research Article The global ionospheric maps (GIMs), generated by Jet Propulsion Laboratory (JPL) and Center for Orbit Determination in Europe (CODE) during a period over 13 years, have been adopted as the primary source of data to provide global ionospheric correction for possible single frequency positioning applications. The investigation aims to assess the performance of new NeQuick model, NeQuick 2, in predicting global total electron content (TEC) through ingesting the GIMs data from the previous day(s). The results show good performance of the GIMs-driven-NeQuick model with average 86% of vertical TEC error less than 10 TECU, when the global daily effective ionization indices (Az) versus modified dip latitude (MODIP) are constructed as a second order polynomial. The performance of GIMs-driven-NeQuick model presents variability with solar activity and behaves better during low solar activity years. The accuracy of TEC prediction can be improved further through performing a four-coefficient function expression of Az versus MODIP. As more measurements from earlier days are involved in the Az optimization procedure, the accuracy may decrease. The results also reveal that more efforts are needed to improve the NeQuick 2 model capabilities to represent the ionosphere in the equatorial and high-latitude regions. Hindawi Publishing Corporation 2015 2015-03-01 /pmc/articles/PMC4359864/ /pubmed/25815369 http://dx.doi.org/10.1155/2015/376702 Text en Copyright © 2015 Xiao Yu et al. https://creativecommons.org/licenses/by/3.0/ This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
spellingShingle Research Article
Yu, Xiao
She, Chengli
Zhen, Weimin
Bruno, Nava
Liu, Dun
Yue, Xinan
Ou, Ming
Xu, Jisheng
Ionospheric Correction Based on Ingestion of Global Ionospheric Maps into the NeQuick 2 Model
title Ionospheric Correction Based on Ingestion of Global Ionospheric Maps into the NeQuick 2 Model
title_full Ionospheric Correction Based on Ingestion of Global Ionospheric Maps into the NeQuick 2 Model
title_fullStr Ionospheric Correction Based on Ingestion of Global Ionospheric Maps into the NeQuick 2 Model
title_full_unstemmed Ionospheric Correction Based on Ingestion of Global Ionospheric Maps into the NeQuick 2 Model
title_short Ionospheric Correction Based on Ingestion of Global Ionospheric Maps into the NeQuick 2 Model
title_sort ionospheric correction based on ingestion of global ionospheric maps into the nequick 2 model
topic Research Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4359864/
https://www.ncbi.nlm.nih.gov/pubmed/25815369
http://dx.doi.org/10.1155/2015/376702
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