Integrity investigation of global ionospheric TEC maps for high-precision positioning

Aside from the ionospheric total electron content (TEC) information, root-mean-square (RMS) maps are also provided as the standard deviations of the corresponding TEC errors in global ionospheric maps (GIMs). As the RMS maps are commonly used as the accuracy indicator of GIMs to optimize the stochas...

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Autores: Zhao, Jiaojiao, Pajares-Hernández, Manuel, Li, Zishen, Wang, Ningbo, Yuan, Hong
Tipo de recurso: artículo
Estado:Versión publicada
Fecha de publicación:2021
País:España
Institución:Consejo Superior de Investigaciones Científicas (CSIC)
Repositorio:DIGITAL.CSIC. Repositorio Institucional del CSIC
OAI Identifier:oai:digital.csic.es:10261/249619
Acceso en línea:http://hdl.handle.net/10261/249619
Access Level:acceso abierto
Palabra clave:Global ionospheric maps
Ionospheric model integrity
Differential slant total electron content (dSTEC)
International GNSS Service (IGS)
GNSS
Global navigation satellite systems
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spelling Integrity investigation of global ionospheric TEC maps for high-precision positioningZhao, JiaojiaoPajares-Hernández, ManuelLi, ZishenWang, NingboYuan, HongGlobal ionospheric mapsIonospheric model integrityDifferential slant total electron content (dSTEC)International GNSS Service (IGS)GNSSGlobal navigation satellite systemsAside from the ionospheric total electron content (TEC) information, root-mean-square (RMS) maps are also provided as the standard deviations of the corresponding TEC errors in global ionospheric maps (GIMs). As the RMS maps are commonly used as the accuracy indicator of GIMs to optimize the stochastic model of precise point positioning algorithms, it is of crucial importance to investigate the reliability of RMS maps involved in GIMs of different Ionospheric Associated Analysis Centers (IAACs) of the International GNSS Service (IGS), i.e., the integrity of GIMs. We indirectly analyzed the reliability of RMS maps by comparing the actual error of the differential STEC (dSTEC) with the RMS of the dSTEC derived from the RMS maps. With this method, the integrity of seven rapid IGS GIMs (UQRG, CORG, JPRG, WHRG, EHRG, EMRG, and IGRG) and six final GIMs (UPCG, CODG, JPLG, WHUG, ESAG and IGSG) was examined under the maximum and minimum solar activity conditions as well as the geomagnetic storm period. The results reveal that the reliability of the RMS maps is significantly different for the GIMs from different IAACs. Among these GIMs, the values in the RMS maps of UQRG are large, which can be used as ionospheric protection level, while the RMS values in EHRG and ESAG are significantly lower than the realistic RMS. The rapid and final GIMs from CODE, JPL and WHU provide quite reasonable RMS maps. The bounding performance of RMS maps can be influenced by the location of the stations, while the influence of solar activity and the geomagnetic storm is not obvious.Thanks to IGS for providing the free data from worldwide area. The data processing is based on the modified version of IonSAT tools which was developed by the second author. This work was supported by the Strategic Priority Research Program of Chinese Academy of Sciences (XDA17010202), the National Key Research Program of China (2017YFE0131400), National Natural Science Foundation of China (41704038, 41730109, 42074043), the Scientific Instrument Developing Project of the Chinese Academy of Sciences (YJKYYQ20190071), the BDS Industrialization Project (GFZX030302030201-2), the Alliance of International Science Organizations(ANSO-CR-KP-2020-12), the joint experiment between GTVB and ZFS system (No. 0701-204120130581).Springer NatureChinese Academy of SciencesNational Natural Science Foundation of ChinaAlliance of International Science OrganizationsConsejo Superior de Investigaciones Científicas [https://ror.org/02gfc7t72]2021202120212021info:eu-repo/semantics/articlehttp://purl.org/coar/resource_type/c_6501Publisher's versioninfo:eu-repo/semantics/publishedVersionhttp://hdl.handle.net/10261/249619reponame:DIGITAL.CSIC. Repositorio Institucional del CSICinstname:Consejo Superior de Investigaciones Científicas (CSIC)Ingléshttp://doi.org/10.1007/s00190-021-01487-8Síinfo:eu-repo/semantics/openAccessoai:digital.csic.es:10261/2496192026-05-22T06:33:51Z
dc.title.none.fl_str_mv Integrity investigation of global ionospheric TEC maps for high-precision positioning
title Integrity investigation of global ionospheric TEC maps for high-precision positioning
spellingShingle Integrity investigation of global ionospheric TEC maps for high-precision positioning
Zhao, Jiaojiao
Global ionospheric maps
Ionospheric model integrity
Differential slant total electron content (dSTEC)
International GNSS Service (IGS)
GNSS
Global navigation satellite systems
title_short Integrity investigation of global ionospheric TEC maps for high-precision positioning
title_full Integrity investigation of global ionospheric TEC maps for high-precision positioning
title_fullStr Integrity investigation of global ionospheric TEC maps for high-precision positioning
title_full_unstemmed Integrity investigation of global ionospheric TEC maps for high-precision positioning
title_sort Integrity investigation of global ionospheric TEC maps for high-precision positioning
dc.creator.none.fl_str_mv Zhao, Jiaojiao
Pajares-Hernández, Manuel
Li, Zishen
Wang, Ningbo
Yuan, Hong
author Zhao, Jiaojiao
author_facet Zhao, Jiaojiao
Pajares-Hernández, Manuel
Li, Zishen
Wang, Ningbo
Yuan, Hong
author_role author
author2 Pajares-Hernández, Manuel
Li, Zishen
Wang, Ningbo
Yuan, Hong
author2_role author
author
author
author
dc.contributor.none.fl_str_mv Chinese Academy of Sciences
National Natural Science Foundation of China
Alliance of International Science Organizations
Consejo Superior de Investigaciones Científicas [https://ror.org/02gfc7t72]
dc.subject.none.fl_str_mv Global ionospheric maps
Ionospheric model integrity
Differential slant total electron content (dSTEC)
International GNSS Service (IGS)
GNSS
Global navigation satellite systems
topic Global ionospheric maps
Ionospheric model integrity
Differential slant total electron content (dSTEC)
International GNSS Service (IGS)
GNSS
Global navigation satellite systems
description Aside from the ionospheric total electron content (TEC) information, root-mean-square (RMS) maps are also provided as the standard deviations of the corresponding TEC errors in global ionospheric maps (GIMs). As the RMS maps are commonly used as the accuracy indicator of GIMs to optimize the stochastic model of precise point positioning algorithms, it is of crucial importance to investigate the reliability of RMS maps involved in GIMs of different Ionospheric Associated Analysis Centers (IAACs) of the International GNSS Service (IGS), i.e., the integrity of GIMs. We indirectly analyzed the reliability of RMS maps by comparing the actual error of the differential STEC (dSTEC) with the RMS of the dSTEC derived from the RMS maps. With this method, the integrity of seven rapid IGS GIMs (UQRG, CORG, JPRG, WHRG, EHRG, EMRG, and IGRG) and six final GIMs (UPCG, CODG, JPLG, WHUG, ESAG and IGSG) was examined under the maximum and minimum solar activity conditions as well as the geomagnetic storm period. The results reveal that the reliability of the RMS maps is significantly different for the GIMs from different IAACs. Among these GIMs, the values in the RMS maps of UQRG are large, which can be used as ionospheric protection level, while the RMS values in EHRG and ESAG are significantly lower than the realistic RMS. The rapid and final GIMs from CODE, JPL and WHU provide quite reasonable RMS maps. The bounding performance of RMS maps can be influenced by the location of the stations, while the influence of solar activity and the geomagnetic storm is not obvious.
publishDate 2021
dc.date.none.fl_str_mv 2021
2021
2021
2021
dc.type.none.fl_str_mv info:eu-repo/semantics/article
http://purl.org/coar/resource_type/c_6501
Publisher's version
info:eu-repo/semantics/publishedVersion
format article
status_str publishedVersion
dc.identifier.none.fl_str_mv http://hdl.handle.net/10261/249619
url http://hdl.handle.net/10261/249619
dc.language.none.fl_str_mv Inglés
language_invalid_str_mv Inglés
dc.relation.none.fl_str_mv http://doi.org/10.1007/s00190-021-01487-8
Sí
dc.rights.none.fl_str_mv info:eu-repo/semantics/openAccess
eu_rights_str_mv openAccess
dc.publisher.none.fl_str_mv Springer Nature
publisher.none.fl_str_mv Springer Nature
dc.source.none.fl_str_mv reponame:DIGITAL.CSIC. Repositorio Institucional del CSIC
instname:Consejo Superior de Investigaciones Científicas (CSIC)
instname_str Consejo Superior de Investigaciones Científicas (CSIC)
reponame_str DIGITAL.CSIC. Repositorio Institucional del CSIC
collection DIGITAL.CSIC. Repositorio Institucional del CSIC
repository.name.fl_str_mv
repository.mail.fl_str_mv
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score 15,81155

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