Seasonal analysis of Klobuchar and NeQuick G single-frequency ionospheric models performance in 2018
Autor(a) principal: | |
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Data de Publicação: | 2020 |
Outros Autores: | , , , |
Tipo de documento: | Artigo |
Idioma: | eng |
Título da fonte: | Repositório Institucional da UNESP |
Texto Completo: | http://dx.doi.org/10.1016/j.asr.2020.11.013 http://hdl.handle.net/11449/206956 |
Resumo: | For single frequency positioning, the ionospheric effects can be minimized by using an ionospheric model, e.g., the Klobuchar or the NeQuick G. These models, respectively associated with the Global Positioning System (GPS) and Galileo systems, are based on a set of transmitted coefficients that describe the background ionospheric behavior and can be used to estimate the ionospheric delay at any time and location on the globe. We evaluate the accuracy and seasonal behavior of the Klobuchar and the NeQuick G models at different latitudes during the solar minimum year of 2018. Calibrated ionospheric Slant Total Electron Content (STEC) values from 33 MGEX (The Multi-GNSS Experiment) stations tracking GPS and Galileo satellites are used as a reference for comparison. The evaluation results show that, for low solar activity conditions (Winter Solstice), the Klobuchar model usually overestimates the ionospheric delay measured on the L1 frequency, with a mean bias of 0.93 m, and performs better than NeQuick G in regions and periods of high ionospheric activity (Spring and Autumn Equinoxes). NeQuick G usually underestimates the delay, with a mean bias of −0.14 m, performing better than Klobuchar in regions and periods of low ionospheric activity. Overall, Klobuchar and NeQuick G presented a modelling error RMS of 1.54 m and 1.19 m respectively. |
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Seasonal analysis of Klobuchar and NeQuick G single-frequency ionospheric models performance in 2018Calibrated STECIonospheric modelsKlobucharNeQuick GFor single frequency positioning, the ionospheric effects can be minimized by using an ionospheric model, e.g., the Klobuchar or the NeQuick G. These models, respectively associated with the Global Positioning System (GPS) and Galileo systems, are based on a set of transmitted coefficients that describe the background ionospheric behavior and can be used to estimate the ionospheric delay at any time and location on the globe. We evaluate the accuracy and seasonal behavior of the Klobuchar and the NeQuick G models at different latitudes during the solar minimum year of 2018. Calibrated ionospheric Slant Total Electron Content (STEC) values from 33 MGEX (The Multi-GNSS Experiment) stations tracking GPS and Galileo satellites are used as a reference for comparison. The evaluation results show that, for low solar activity conditions (Winter Solstice), the Klobuchar model usually overestimates the ionospheric delay measured on the L1 frequency, with a mean bias of 0.93 m, and performs better than NeQuick G in regions and periods of high ionospheric activity (Spring and Autumn Equinoxes). NeQuick G usually underestimates the delay, with a mean bias of −0.14 m, performing better than Klobuchar in regions and periods of low ionospheric activity. Overall, Klobuchar and NeQuick G presented a modelling error RMS of 1.54 m and 1.19 m respectively.São Paulo State University (UNESP) School of Technology and Sciences, Presidente Prudente - Roberto Simonsen, 305Nottingham Geospatial Institute University of Nottingham, Triumph RoadSão Paulo State University (UNESP) School of Technology and Sciences, Presidente Prudente - Roberto Simonsen, 305Universidade Estadual Paulista (Unesp)University of NottinghamSetti Júnior, Paulo de Tarso [UNESP]Aquino, MarcioVeettil, Sreeja VadakkeAlves, Daniele Barroca Marra [UNESP]Silva, Crislaine Menezes da [UNESP]2021-06-25T10:46:42Z2021-06-25T10:46:42Z2020-01-01info:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/articlehttp://dx.doi.org/10.1016/j.asr.2020.11.013Advances in Space Research.1879-19480273-1177http://hdl.handle.net/11449/20695610.1016/j.asr.2020.11.0132-s2.0-85097480941Scopusreponame:Repositório Institucional da UNESPinstname:Universidade Estadual Paulista (UNESP)instacron:UNESPengAdvances in Space Researchinfo:eu-repo/semantics/openAccess2024-06-18T18:18:17Zoai:repositorio.unesp.br:11449/206956Repositório InstitucionalPUBhttp://repositorio.unesp.br/oai/requestopendoar:29462024-08-05T23:07:44.720757Repositório Institucional da UNESP - Universidade Estadual Paulista (UNESP)false |
dc.title.none.fl_str_mv |
Seasonal analysis of Klobuchar and NeQuick G single-frequency ionospheric models performance in 2018 |
title |
Seasonal analysis of Klobuchar and NeQuick G single-frequency ionospheric models performance in 2018 |
spellingShingle |
Seasonal analysis of Klobuchar and NeQuick G single-frequency ionospheric models performance in 2018 Setti Júnior, Paulo de Tarso [UNESP] Calibrated STEC Ionospheric models Klobuchar NeQuick G |
title_short |
Seasonal analysis of Klobuchar and NeQuick G single-frequency ionospheric models performance in 2018 |
title_full |
Seasonal analysis of Klobuchar and NeQuick G single-frequency ionospheric models performance in 2018 |
title_fullStr |
Seasonal analysis of Klobuchar and NeQuick G single-frequency ionospheric models performance in 2018 |
title_full_unstemmed |
Seasonal analysis of Klobuchar and NeQuick G single-frequency ionospheric models performance in 2018 |
title_sort |
Seasonal analysis of Klobuchar and NeQuick G single-frequency ionospheric models performance in 2018 |
author |
Setti Júnior, Paulo de Tarso [UNESP] |
author_facet |
Setti Júnior, Paulo de Tarso [UNESP] Aquino, Marcio Veettil, Sreeja Vadakke Alves, Daniele Barroca Marra [UNESP] Silva, Crislaine Menezes da [UNESP] |
author_role |
author |
author2 |
Aquino, Marcio Veettil, Sreeja Vadakke Alves, Daniele Barroca Marra [UNESP] Silva, Crislaine Menezes da [UNESP] |
author2_role |
author author author author |
dc.contributor.none.fl_str_mv |
Universidade Estadual Paulista (Unesp) University of Nottingham |
dc.contributor.author.fl_str_mv |
Setti Júnior, Paulo de Tarso [UNESP] Aquino, Marcio Veettil, Sreeja Vadakke Alves, Daniele Barroca Marra [UNESP] Silva, Crislaine Menezes da [UNESP] |
dc.subject.por.fl_str_mv |
Calibrated STEC Ionospheric models Klobuchar NeQuick G |
topic |
Calibrated STEC Ionospheric models Klobuchar NeQuick G |
description |
For single frequency positioning, the ionospheric effects can be minimized by using an ionospheric model, e.g., the Klobuchar or the NeQuick G. These models, respectively associated with the Global Positioning System (GPS) and Galileo systems, are based on a set of transmitted coefficients that describe the background ionospheric behavior and can be used to estimate the ionospheric delay at any time and location on the globe. We evaluate the accuracy and seasonal behavior of the Klobuchar and the NeQuick G models at different latitudes during the solar minimum year of 2018. Calibrated ionospheric Slant Total Electron Content (STEC) values from 33 MGEX (The Multi-GNSS Experiment) stations tracking GPS and Galileo satellites are used as a reference for comparison. The evaluation results show that, for low solar activity conditions (Winter Solstice), the Klobuchar model usually overestimates the ionospheric delay measured on the L1 frequency, with a mean bias of 0.93 m, and performs better than NeQuick G in regions and periods of high ionospheric activity (Spring and Autumn Equinoxes). NeQuick G usually underestimates the delay, with a mean bias of −0.14 m, performing better than Klobuchar in regions and periods of low ionospheric activity. Overall, Klobuchar and NeQuick G presented a modelling error RMS of 1.54 m and 1.19 m respectively. |
publishDate |
2020 |
dc.date.none.fl_str_mv |
2020-01-01 2021-06-25T10:46:42Z 2021-06-25T10:46:42Z |
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/10.1016/j.asr.2020.11.013 Advances in Space Research. 1879-1948 0273-1177 http://hdl.handle.net/11449/206956 10.1016/j.asr.2020.11.013 2-s2.0-85097480941 |
url |
http://dx.doi.org/10.1016/j.asr.2020.11.013 http://hdl.handle.net/11449/206956 |
identifier_str_mv |
Advances in Space Research. 1879-1948 0273-1177 10.1016/j.asr.2020.11.013 2-s2.0-85097480941 |
dc.language.iso.fl_str_mv |
eng |
language |
eng |
dc.relation.none.fl_str_mv |
Advances in Space Research |
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_ |
1808129491715751936 |