Evaluation of the gnss positioning performance under influence of the ionospheric scintillation
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/10.1590/s1982-21702020000300014 http://hdl.handle.net/11449/206885 |
Resumo: | The ionosphere may not only degrade the accuracy of the GNSS positioning but also reduce its availability because there is a high dependence between signal losses and ionospheric irregularities. Irregularities in the Earth’s ionosphere may produce rapid fluctuations in phase and amplitude. These rapid fluctuations are called ionospheric scintillation. Thus, loss of signal can occur due to the effects of diffraction and refraction, which cause a weakening in the signal received by the GNSS receivers. In this way, this paper aims to evaluate the magnitude of ionospheric scintillation in Brazil and the performance of the positioning under its influence in the period of high solar activity in the current cycle (24), through the Spearman correlation analysis and the Wavelet periodogram. For that, three-year time series (2012 to 2014) of the S4 index and 3D MSE (Mean Squared Error) of three Brazilian stations with different ionospheric conditions were considered, PALM (near the Geomagnetic Equator) PRU2 (Equatorial region and Anomalies) and POAL (Mid-latitude region). Thus, it was possible to evaluate the correlation between the accuracy of the precise point positioning using only the C/A code of the GPS satellite and the S4 index. As a result, there was a correlation of 53% and 51%, using the Spearman method, for the PALM and PRU2 series, respectively. In addition, considering the analysis of space-frequency in relation to time by the Wavelet coherence method, a correlation of more than 70% is noted in the period of greatest 3D MSE concerning the spring and autumn equinox months. |
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Evaluation of the gnss positioning performance under influence of the ionospheric scintillationCorrelationIonospheric EffectsS4 IndexWavelet CoherenceThe ionosphere may not only degrade the accuracy of the GNSS positioning but also reduce its availability because there is a high dependence between signal losses and ionospheric irregularities. Irregularities in the Earth’s ionosphere may produce rapid fluctuations in phase and amplitude. These rapid fluctuations are called ionospheric scintillation. Thus, loss of signal can occur due to the effects of diffraction and refraction, which cause a weakening in the signal received by the GNSS receivers. In this way, this paper aims to evaluate the magnitude of ionospheric scintillation in Brazil and the performance of the positioning under its influence in the period of high solar activity in the current cycle (24), through the Spearman correlation analysis and the Wavelet periodogram. For that, three-year time series (2012 to 2014) of the S4 index and 3D MSE (Mean Squared Error) of three Brazilian stations with different ionospheric conditions were considered, PALM (near the Geomagnetic Equator) PRU2 (Equatorial region and Anomalies) and POAL (Mid-latitude region). Thus, it was possible to evaluate the correlation between the accuracy of the precise point positioning using only the C/A code of the GPS satellite and the S4 index. As a result, there was a correlation of 53% and 51%, using the Spearman method, for the PALM and PRU2 series, respectively. In addition, considering the analysis of space-frequency in relation to time by the Wavelet coherence method, a correlation of more than 70% is noted in the period of greatest 3D MSE concerning the spring and autumn equinox months.Seventh Framework ProgrammeFundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)Universidade Federal Rural da Amazônia-UFRA Instituto CiberespacialUniversidade Federal Rural da Amazônia-UFRA Curso de Engenharia Cartográfica e de AgrimensuraUniversidade Estatual Paulista – UNESP Departamento de Cartografia, Presidente PrudenteUniversidade Tecnológica Federal do Paraná-UTFPR Coordenação de Engenharia CivilUniversidade Estatual Paulista – UNESP Departamento de Cartografia, Presidente PrudenteFAPESP: 2014/03858–9Instituto CiberespacialCurso de Engenharia Cartográfica e de AgrimensuraUniversidade Estadual Paulista (Unesp)Coordenação de Engenharia CivilCaldeira, Mayara Cobacho OrtegaCaldeira, Carlos Rodrigo TanajuraCereja, Samara Sunny Dos AnjosAlves, Daniele Barroca Marra [UNESP]de Aguiar, Claudinei Rodrigues2021-06-25T10:45:23Z2021-06-25T10:45:23Z2020-01-01info:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/article1-19http://dx.doi.org/10.1590/s1982-21702020000300014Boletim de Ciencias Geodesicas, v. 26, n. 3, p. 1-19, 2020.1982-21701413-4853http://hdl.handle.net/11449/20688510.1590/s1982-217020200003000142-s2.0-85096742007Scopusreponame:Repositório Institucional da UNESPinstname:Universidade Estadual Paulista (UNESP)instacron:UNESPengBoletim de Ciencias Geodesicasinfo:eu-repo/semantics/openAccess2021-10-23T15:33:53Zoai:repositorio.unesp.br:11449/206885Repositório InstitucionalPUBhttp://repositorio.unesp.br/oai/requestopendoar:29462021-10-23T15:33:53Repositório Institucional da UNESP - Universidade Estadual Paulista (UNESP)false |
dc.title.none.fl_str_mv |
Evaluation of the gnss positioning performance under influence of the ionospheric scintillation |
title |
Evaluation of the gnss positioning performance under influence of the ionospheric scintillation |
spellingShingle |
Evaluation of the gnss positioning performance under influence of the ionospheric scintillation Caldeira, Mayara Cobacho Ortega Correlation Ionospheric Effects S4 Index Wavelet Coherence |
title_short |
Evaluation of the gnss positioning performance under influence of the ionospheric scintillation |
title_full |
Evaluation of the gnss positioning performance under influence of the ionospheric scintillation |
title_fullStr |
Evaluation of the gnss positioning performance under influence of the ionospheric scintillation |
title_full_unstemmed |
Evaluation of the gnss positioning performance under influence of the ionospheric scintillation |
title_sort |
Evaluation of the gnss positioning performance under influence of the ionospheric scintillation |
author |
Caldeira, Mayara Cobacho Ortega |
author_facet |
Caldeira, Mayara Cobacho Ortega Caldeira, Carlos Rodrigo Tanajura Cereja, Samara Sunny Dos Anjos Alves, Daniele Barroca Marra [UNESP] de Aguiar, Claudinei Rodrigues |
author_role |
author |
author2 |
Caldeira, Carlos Rodrigo Tanajura Cereja, Samara Sunny Dos Anjos Alves, Daniele Barroca Marra [UNESP] de Aguiar, Claudinei Rodrigues |
author2_role |
author author author author |
dc.contributor.none.fl_str_mv |
Instituto Ciberespacial Curso de Engenharia Cartográfica e de Agrimensura Universidade Estadual Paulista (Unesp) Coordenação de Engenharia Civil |
dc.contributor.author.fl_str_mv |
Caldeira, Mayara Cobacho Ortega Caldeira, Carlos Rodrigo Tanajura Cereja, Samara Sunny Dos Anjos Alves, Daniele Barroca Marra [UNESP] de Aguiar, Claudinei Rodrigues |
dc.subject.por.fl_str_mv |
Correlation Ionospheric Effects S4 Index Wavelet Coherence |
topic |
Correlation Ionospheric Effects S4 Index Wavelet Coherence |
description |
The ionosphere may not only degrade the accuracy of the GNSS positioning but also reduce its availability because there is a high dependence between signal losses and ionospheric irregularities. Irregularities in the Earth’s ionosphere may produce rapid fluctuations in phase and amplitude. These rapid fluctuations are called ionospheric scintillation. Thus, loss of signal can occur due to the effects of diffraction and refraction, which cause a weakening in the signal received by the GNSS receivers. In this way, this paper aims to evaluate the magnitude of ionospheric scintillation in Brazil and the performance of the positioning under its influence in the period of high solar activity in the current cycle (24), through the Spearman correlation analysis and the Wavelet periodogram. For that, three-year time series (2012 to 2014) of the S4 index and 3D MSE (Mean Squared Error) of three Brazilian stations with different ionospheric conditions were considered, PALM (near the Geomagnetic Equator) PRU2 (Equatorial region and Anomalies) and POAL (Mid-latitude region). Thus, it was possible to evaluate the correlation between the accuracy of the precise point positioning using only the C/A code of the GPS satellite and the S4 index. As a result, there was a correlation of 53% and 51%, using the Spearman method, for the PALM and PRU2 series, respectively. In addition, considering the analysis of space-frequency in relation to time by the Wavelet coherence method, a correlation of more than 70% is noted in the period of greatest 3D MSE concerning the spring and autumn equinox months. |
publishDate |
2020 |
dc.date.none.fl_str_mv |
2020-01-01 2021-06-25T10:45:23Z 2021-06-25T10:45:23Z |
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/10.1590/s1982-21702020000300014 Boletim de Ciencias Geodesicas, v. 26, n. 3, p. 1-19, 2020. 1982-2170 1413-4853 http://hdl.handle.net/11449/206885 10.1590/s1982-21702020000300014 2-s2.0-85096742007 |
url |
http://dx.doi.org/10.1590/s1982-21702020000300014 http://hdl.handle.net/11449/206885 |
identifier_str_mv |
Boletim de Ciencias Geodesicas, v. 26, n. 3, p. 1-19, 2020. 1982-2170 1413-4853 10.1590/s1982-21702020000300014 2-s2.0-85096742007 |
dc.language.iso.fl_str_mv |
eng |
language |
eng |
dc.relation.none.fl_str_mv |
Boletim de Ciencias Geodesicas |
dc.rights.driver.fl_str_mv |
info:eu-repo/semantics/openAccess |
eu_rights_str_mv |
openAccess |
dc.format.none.fl_str_mv |
1-19 |
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 |
|
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1792962259585073152 |