Two-Way Assessment of Ionospheric Maps Performance Over the Brazilian Region: Global Versus Regional Products
Autor(a) principal: | |
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Data de Publicação: | 2023 |
Outros Autores: | , , , , , |
Tipo de documento: | Artigo |
Idioma: | eng |
Título da fonte: | Repositório Institucional da UNESP |
Texto Completo: | http://dx.doi.org/10.1029/2022SW003252 http://hdl.handle.net/11449/248407 |
Resumo: | Vertical total electron content (VTEC) has great importance in describing the ionosphere. VTEC values are commonly distributed in regular grids by means of so-called global ionospheric maps (GIMs) and regional ionospheric maps (RIMs). Although considerable research has been conducted to develop regional and global models, there is no clear understanding of the benefits of using RIMs over GIMs. Aiming to contribute to this discussion, our investigation presents a comparison between seven global and regional ionospheric maps considering two approaches: (a) ionosonde data-based assessment and (b) global navigation satellite systems (GNSS) positioning assessment. A challenging low latitude ionosphere scenario, the Brazilian region, was selected during a week with an active geomagnetic storm. The assessment results with ionosonde data have shown better performance of the RIM products named OTHR and OTRG. Among the global products, CODG and UQRG have shown the best performances. The worst results were obtained with the RIM named Instituto Nacional de Pesquisas Espaciais. The assessment with GNSS positioning led to larger and noisier errors close to the equatorial anomaly. Two of the analyzed RIMs presented expected large errors in stations at the edges of the coverage area. To overcome this issue, a hybrid product was proposed to extend the RIM covered region. The proposed hybrid product (OTRG) presented the best results in the GNSS positioning domain. |
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Two-Way Assessment of Ionospheric Maps Performance Over the Brazilian Region: Global Versus Regional Productsequatorial regionglobal ionospheric mapsGNSSionosondeionosphereregional ionospheric mapsVertical total electron content (VTEC) has great importance in describing the ionosphere. VTEC values are commonly distributed in regular grids by means of so-called global ionospheric maps (GIMs) and regional ionospheric maps (RIMs). Although considerable research has been conducted to develop regional and global models, there is no clear understanding of the benefits of using RIMs over GIMs. Aiming to contribute to this discussion, our investigation presents a comparison between seven global and regional ionospheric maps considering two approaches: (a) ionosonde data-based assessment and (b) global navigation satellite systems (GNSS) positioning assessment. A challenging low latitude ionosphere scenario, the Brazilian region, was selected during a week with an active geomagnetic storm. The assessment results with ionosonde data have shown better performance of the RIM products named OTHR and OTRG. Among the global products, CODG and UQRG have shown the best performances. The worst results were obtained with the RIM named Instituto Nacional de Pesquisas Espaciais. The assessment with GNSS positioning led to larger and noisier errors close to the equatorial anomaly. Two of the analyzed RIMs presented expected large errors in stations at the edges of the coverage area. To overcome this issue, a hybrid product was proposed to extend the RIM covered region. The proposed hybrid product (OTRG) presented the best results in the GNSS positioning domain.Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq)Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)Department of Cartography São Paulo State University (UNESP)Department of Mathematics Universitat Politècnica de Catalunya (UPC) UPC-IonSAT UPC-IEEC Research GroupsDeutsches Geodätisches Forschungsinstitut der Technischen Universität MünchenNational Land Survey Finnish Geospatial Research Institute (FGI)Department of Cartography São Paulo State University (UNESP)FAPESP: 2017/50115-0FAPESP: 2021/05285-0CNPq: 465648/2014-2CAPES: 88887.137186/2017-00CAPES: Financial code 001Universidade Estadual Paulista (UNESP)Research GroupsDeutsches Geodätisches Forschungsinstitut der Technischen Universität MünchenFinnish Geospatial Research Institute (FGI)Jerez, Gabriel O. [UNESP]Hernández-Pajares, ManuelGoss, AndreasProl, Fabricio S.Alves, Daniele B. M. [UNESP]Monico, João F. G. [UNESP]Schmidt, Michael2023-07-29T13:43:12Z2023-07-29T13:43:12Z2023-02-01info:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/articlehttp://dx.doi.org/10.1029/2022SW003252Space Weather, v. 21, n. 2, 2023.1542-7390http://hdl.handle.net/11449/24840710.1029/2022SW0032522-s2.0-85148641308Scopusreponame:Repositório Institucional da UNESPinstname:Universidade Estadual Paulista (UNESP)instacron:UNESPengSpace Weatherinfo:eu-repo/semantics/openAccess2024-06-18T15:02:06Zoai:repositorio.unesp.br:11449/248407Repositório InstitucionalPUBhttp://repositorio.unesp.br/oai/requestopendoar:29462024-06-18T15:02:06Repositório Institucional da UNESP - Universidade Estadual Paulista (UNESP)false |
dc.title.none.fl_str_mv |
Two-Way Assessment of Ionospheric Maps Performance Over the Brazilian Region: Global Versus Regional Products |
title |
Two-Way Assessment of Ionospheric Maps Performance Over the Brazilian Region: Global Versus Regional Products |
spellingShingle |
Two-Way Assessment of Ionospheric Maps Performance Over the Brazilian Region: Global Versus Regional Products Jerez, Gabriel O. [UNESP] equatorial region global ionospheric maps GNSS ionosonde ionosphere regional ionospheric maps |
title_short |
Two-Way Assessment of Ionospheric Maps Performance Over the Brazilian Region: Global Versus Regional Products |
title_full |
Two-Way Assessment of Ionospheric Maps Performance Over the Brazilian Region: Global Versus Regional Products |
title_fullStr |
Two-Way Assessment of Ionospheric Maps Performance Over the Brazilian Region: Global Versus Regional Products |
title_full_unstemmed |
Two-Way Assessment of Ionospheric Maps Performance Over the Brazilian Region: Global Versus Regional Products |
title_sort |
Two-Way Assessment of Ionospheric Maps Performance Over the Brazilian Region: Global Versus Regional Products |
author |
Jerez, Gabriel O. [UNESP] |
author_facet |
Jerez, Gabriel O. [UNESP] Hernández-Pajares, Manuel Goss, Andreas Prol, Fabricio S. Alves, Daniele B. M. [UNESP] Monico, João F. G. [UNESP] Schmidt, Michael |
author_role |
author |
author2 |
Hernández-Pajares, Manuel Goss, Andreas Prol, Fabricio S. Alves, Daniele B. M. [UNESP] Monico, João F. G. [UNESP] Schmidt, Michael |
author2_role |
author author author author author author |
dc.contributor.none.fl_str_mv |
Universidade Estadual Paulista (UNESP) Research Groups Deutsches Geodätisches Forschungsinstitut der Technischen Universität München Finnish Geospatial Research Institute (FGI) |
dc.contributor.author.fl_str_mv |
Jerez, Gabriel O. [UNESP] Hernández-Pajares, Manuel Goss, Andreas Prol, Fabricio S. Alves, Daniele B. M. [UNESP] Monico, João F. G. [UNESP] Schmidt, Michael |
dc.subject.por.fl_str_mv |
equatorial region global ionospheric maps GNSS ionosonde ionosphere regional ionospheric maps |
topic |
equatorial region global ionospheric maps GNSS ionosonde ionosphere regional ionospheric maps |
description |
Vertical total electron content (VTEC) has great importance in describing the ionosphere. VTEC values are commonly distributed in regular grids by means of so-called global ionospheric maps (GIMs) and regional ionospheric maps (RIMs). Although considerable research has been conducted to develop regional and global models, there is no clear understanding of the benefits of using RIMs over GIMs. Aiming to contribute to this discussion, our investigation presents a comparison between seven global and regional ionospheric maps considering two approaches: (a) ionosonde data-based assessment and (b) global navigation satellite systems (GNSS) positioning assessment. A challenging low latitude ionosphere scenario, the Brazilian region, was selected during a week with an active geomagnetic storm. The assessment results with ionosonde data have shown better performance of the RIM products named OTHR and OTRG. Among the global products, CODG and UQRG have shown the best performances. The worst results were obtained with the RIM named Instituto Nacional de Pesquisas Espaciais. The assessment with GNSS positioning led to larger and noisier errors close to the equatorial anomaly. Two of the analyzed RIMs presented expected large errors in stations at the edges of the coverage area. To overcome this issue, a hybrid product was proposed to extend the RIM covered region. The proposed hybrid product (OTRG) presented the best results in the GNSS positioning domain. |
publishDate |
2023 |
dc.date.none.fl_str_mv |
2023-07-29T13:43:12Z 2023-07-29T13:43:12Z 2023-02-01 |
dc.type.status.fl_str_mv |
info:eu-repo/semantics/publishedVersion |
dc.type.driver.fl_str_mv |
info:eu-repo/semantics/article |
format |
article |
status_str |
publishedVersion |
dc.identifier.uri.fl_str_mv |
http://dx.doi.org/10.1029/2022SW003252 Space Weather, v. 21, n. 2, 2023. 1542-7390 http://hdl.handle.net/11449/248407 10.1029/2022SW003252 2-s2.0-85148641308 |
url |
http://dx.doi.org/10.1029/2022SW003252 http://hdl.handle.net/11449/248407 |
identifier_str_mv |
Space Weather, v. 21, n. 2, 2023. 1542-7390 10.1029/2022SW003252 2-s2.0-85148641308 |
dc.language.iso.fl_str_mv |
eng |
language |
eng |
dc.relation.none.fl_str_mv |
Space Weather |
dc.rights.driver.fl_str_mv |
info:eu-repo/semantics/openAccess |
eu_rights_str_mv |
openAccess |
dc.source.none.fl_str_mv |
Scopus reponame:Repositório Institucional da UNESP instname:Universidade Estadual Paulista (UNESP) instacron:UNESP |
instname_str |
Universidade Estadual Paulista (UNESP) |
instacron_str |
UNESP |
institution |
UNESP |
reponame_str |
Repositório Institucional da UNESP |
collection |
Repositório Institucional da UNESP |
repository.name.fl_str_mv |
Repositório Institucional da UNESP - Universidade Estadual Paulista (UNESP) |
repository.mail.fl_str_mv |
|
_version_ |
1803650304144572416 |