Comparison of GPS-TEC measurements with IRI2012-TEC predictions in the Brazilian sector during the unusual solar minimum 2009
- Autores
- De Abreu, Alessandro José; Martin, Inácio Malmonge; De Jesus, Rodolfo; Bolzan, Maurício José Alves; Venkatesh, Kavutarapu; Fagundes, Paulo Roberto; Alves, Mauro Angelo; Gende, Mauricio Alfredo; Kumar, Sanjay
- Año de publicación
- 2017
- Idioma
- inglés
- Tipo de recurso
- artículo
- Estado
- versión publicada
- Descripción
- The total electron content (TEC) derived from two Global Positioning System (GPS) receivers localized at Palmas (PAL, 10.2°S, 48.2°W, dip latitude 5.5°S), near equatorial region, and São José dos Campos (SJC, 23.2°S, 45.9°W, dip latitude 17.6°S), under the southern crest of the equatorial ionization anomaly (EIA), in the Brazilian sector are used in this paper. TEC from the latest available IRI-2012 model at the same locations is also used. A comparative study between GPS-TEC and the IRI-2012 model is analyzed during the deep low solar activity period of 2009 in the unusual solar cycle 23. The measurements and the modeled data show that the IRI-TEC model gives the better estimates of the GPS-TEC during the nighttime from January to December months at PAL and SJC. The IRI-TEC model shows larger differences from the GPS-TEC in the afternoon hours, mainly at SJC. These discrepancies observed at SJC in the afternoon hours for all months are possibly due to the dynamics of EIA in consequence of the equatorial fountain effect. At PAL and SJC, oscillations of GPS-TEC with periods around 16 days in April and periods around 27-32 days between September and December possibly are noticed which could be related to a modulation of the semidiurnal tide and Sun’s rotation, respectively. Also, oscillations with periods around 2-4 and 5-10 days from January to December are observed at PAL and SJC, possibly associated with the propagation of planetary waves.
Fil: De Abreu, Alessandro José. Instituto Tecnológico de Aeronáutica; Brasil
Fil: Martin, Inácio Malmonge. Instituto Tecnológico de Aeronáutica; Brasil
Fil: De Jesus, Rodolfo. Centro de Previsao de Tempo e Estudos Climáticos. Instituto Nacional de Pesquisas Espaciais; Brasil
Fil: Bolzan, Maurício José Alves. Universidade Federal de Goiás; Brasil
Fil: Venkatesh, Kavutarapu. Universidade do Vale do Paraíba; Brasil
Fil: Fagundes, Paulo Roberto. Universidade do Vale do Paraíba; Brasil
Fil: Alves, Mauro Angelo. Instituto Tecnológico de Aeronáutica; Brasil
Fil: Gende, Mauricio Alfredo. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - La Plata. Instituto de Astrofísica La Plata. Universidad Nacional de La Plata. Facultad de Ciencias Astronómicas y Geofísicas. Instituto de Astrofísica La Plata; Argentina
Fil: Kumar, Sanjay. Banaras Hindu University; India - Materia
-
Gps-Tec
Ionosphere
Iri Model - Nivel de accesibilidad
- acceso abierto
- Condiciones de uso
- https://creativecommons.org/licenses/by/2.5/ar/
- Repositorio
.jpg)
- Institución
- Consejo Nacional de Investigaciones Científicas y Técnicas
- OAI Identificador
- oai:ri.conicet.gov.ar:11336/56844
Ver los metadatos del registro completo
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Comparison of GPS-TEC measurements with IRI2012-TEC predictions in the Brazilian sector during the unusual solar minimum 2009De Abreu, Alessandro JoséMartin, Inácio MalmongeDe Jesus, RodolfoBolzan, Maurício José AlvesVenkatesh, KavutarapuFagundes, Paulo RobertoAlves, Mauro AngeloGende, Mauricio AlfredoKumar, SanjayGps-TecIonosphereIri Modelhttps://purl.org/becyt/ford/1.5https://purl.org/becyt/ford/1The total electron content (TEC) derived from two Global Positioning System (GPS) receivers localized at Palmas (PAL, 10.2°S, 48.2°W, dip latitude 5.5°S), near equatorial region, and São José dos Campos (SJC, 23.2°S, 45.9°W, dip latitude 17.6°S), under the southern crest of the equatorial ionization anomaly (EIA), in the Brazilian sector are used in this paper. TEC from the latest available IRI-2012 model at the same locations is also used. A comparative study between GPS-TEC and the IRI-2012 model is analyzed during the deep low solar activity period of 2009 in the unusual solar cycle 23. The measurements and the modeled data show that the IRI-TEC model gives the better estimates of the GPS-TEC during the nighttime from January to December months at PAL and SJC. The IRI-TEC model shows larger differences from the GPS-TEC in the afternoon hours, mainly at SJC. These discrepancies observed at SJC in the afternoon hours for all months are possibly due to the dynamics of EIA in consequence of the equatorial fountain effect. At PAL and SJC, oscillations of GPS-TEC with periods around 16 days in April and periods around 27-32 days between September and December possibly are noticed which could be related to a modulation of the semidiurnal tide and Sun’s rotation, respectively. Also, oscillations with periods around 2-4 and 5-10 days from January to December are observed at PAL and SJC, possibly associated with the propagation of planetary waves.Fil: De Abreu, Alessandro José. Instituto Tecnológico de Aeronáutica; BrasilFil: Martin, Inácio Malmonge. Instituto Tecnológico de Aeronáutica; BrasilFil: De Jesus, Rodolfo. Centro de Previsao de Tempo e Estudos Climáticos. Instituto Nacional de Pesquisas Espaciais; BrasilFil: Bolzan, Maurício José Alves. Universidade Federal de Goiás; BrasilFil: Venkatesh, Kavutarapu. Universidade do Vale do Paraíba; BrasilFil: Fagundes, Paulo Roberto. Universidade do Vale do Paraíba; BrasilFil: Alves, Mauro Angelo. Instituto Tecnológico de Aeronáutica; BrasilFil: Gende, Mauricio Alfredo. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - La Plata. Instituto de Astrofísica La Plata. Universidad Nacional de La Plata. Facultad de Ciencias Astronómicas y Geofísicas. Instituto de Astrofísica La Plata; ArgentinaFil: Kumar, Sanjay. Banaras Hindu University; IndiaEditrice Compositori Bologna2017-01info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionhttp://purl.org/coar/resource_type/c_6501info:ar-repo/semantics/articuloapplication/pdfapplication/pdfhttp://hdl.handle.net/11336/56844De Abreu, Alessandro José; Martin, Inácio Malmonge; De Jesus, Rodolfo; Bolzan, Maurício José Alves; Venkatesh, Kavutarapu; et al.; Comparison of GPS-TEC measurements with IRI2012-TEC predictions in the Brazilian sector during the unusual solar minimum 2009; Editrice Compositori Bologna; Annals Of Geophysics; 60; 3; 1-20172037-416X1593-5213CONICET DigitalCONICETenginfo:eu-repo/semantics/altIdentifier/doi/10.4401/ag-7300info:eu-repo/semantics/altIdentifier/url/https://www.annalsofgeophysics.eu/index.php/annals/article/view/7300info:eu-repo/semantics/openAccesshttps://creativecommons.org/licenses/by/2.5/ar/reponame:CONICET Digital (CONICET)instname:Consejo Nacional de Investigaciones Científicas y Técnicas2025-09-10T13:13:09Zoai:ri.conicet.gov.ar:11336/56844instacron:CONICETInstitucionalhttp://ri.conicet.gov.ar/Organismo científico-tecnológicoNo correspondehttp://ri.conicet.gov.ar/oai/requestdasensio@conicet.gov.ar; lcarlino@conicet.gov.arArgentinaNo correspondeNo correspondeNo correspondeopendoar:34982025-09-10 13:13:10.174CONICET Digital (CONICET) - Consejo Nacional de Investigaciones Científicas y Técnicasfalse |
| dc.title.none.fl_str_mv |
Comparison of GPS-TEC measurements with IRI2012-TEC predictions in the Brazilian sector during the unusual solar minimum 2009 |
| title |
Comparison of GPS-TEC measurements with IRI2012-TEC predictions in the Brazilian sector during the unusual solar minimum 2009 |
| spellingShingle |
Comparison of GPS-TEC measurements with IRI2012-TEC predictions in the Brazilian sector during the unusual solar minimum 2009 De Abreu, Alessandro José Gps-Tec Ionosphere Iri Model |
| title_short |
Comparison of GPS-TEC measurements with IRI2012-TEC predictions in the Brazilian sector during the unusual solar minimum 2009 |
| title_full |
Comparison of GPS-TEC measurements with IRI2012-TEC predictions in the Brazilian sector during the unusual solar minimum 2009 |
| title_fullStr |
Comparison of GPS-TEC measurements with IRI2012-TEC predictions in the Brazilian sector during the unusual solar minimum 2009 |
| title_full_unstemmed |
Comparison of GPS-TEC measurements with IRI2012-TEC predictions in the Brazilian sector during the unusual solar minimum 2009 |
| title_sort |
Comparison of GPS-TEC measurements with IRI2012-TEC predictions in the Brazilian sector during the unusual solar minimum 2009 |
| dc.creator.none.fl_str_mv |
De Abreu, Alessandro José Martin, Inácio Malmonge De Jesus, Rodolfo Bolzan, Maurício José Alves Venkatesh, Kavutarapu Fagundes, Paulo Roberto Alves, Mauro Angelo Gende, Mauricio Alfredo Kumar, Sanjay |
| author |
De Abreu, Alessandro José |
| author_facet |
De Abreu, Alessandro José Martin, Inácio Malmonge De Jesus, Rodolfo Bolzan, Maurício José Alves Venkatesh, Kavutarapu Fagundes, Paulo Roberto Alves, Mauro Angelo Gende, Mauricio Alfredo Kumar, Sanjay |
| author_role |
author |
| author2 |
Martin, Inácio Malmonge De Jesus, Rodolfo Bolzan, Maurício José Alves Venkatesh, Kavutarapu Fagundes, Paulo Roberto Alves, Mauro Angelo Gende, Mauricio Alfredo Kumar, Sanjay |
| author2_role |
author author author author author author author author |
| dc.subject.none.fl_str_mv |
Gps-Tec Ionosphere Iri Model |
| topic |
Gps-Tec Ionosphere Iri Model |
| purl_subject.fl_str_mv |
https://purl.org/becyt/ford/1.5 https://purl.org/becyt/ford/1 |
| dc.description.none.fl_txt_mv |
The total electron content (TEC) derived from two Global Positioning System (GPS) receivers localized at Palmas (PAL, 10.2°S, 48.2°W, dip latitude 5.5°S), near equatorial region, and São José dos Campos (SJC, 23.2°S, 45.9°W, dip latitude 17.6°S), under the southern crest of the equatorial ionization anomaly (EIA), in the Brazilian sector are used in this paper. TEC from the latest available IRI-2012 model at the same locations is also used. A comparative study between GPS-TEC and the IRI-2012 model is analyzed during the deep low solar activity period of 2009 in the unusual solar cycle 23. The measurements and the modeled data show that the IRI-TEC model gives the better estimates of the GPS-TEC during the nighttime from January to December months at PAL and SJC. The IRI-TEC model shows larger differences from the GPS-TEC in the afternoon hours, mainly at SJC. These discrepancies observed at SJC in the afternoon hours for all months are possibly due to the dynamics of EIA in consequence of the equatorial fountain effect. At PAL and SJC, oscillations of GPS-TEC with periods around 16 days in April and periods around 27-32 days between September and December possibly are noticed which could be related to a modulation of the semidiurnal tide and Sun’s rotation, respectively. Also, oscillations with periods around 2-4 and 5-10 days from January to December are observed at PAL and SJC, possibly associated with the propagation of planetary waves. Fil: De Abreu, Alessandro José. Instituto Tecnológico de Aeronáutica; Brasil Fil: Martin, Inácio Malmonge. Instituto Tecnológico de Aeronáutica; Brasil Fil: De Jesus, Rodolfo. Centro de Previsao de Tempo e Estudos Climáticos. Instituto Nacional de Pesquisas Espaciais; Brasil Fil: Bolzan, Maurício José Alves. Universidade Federal de Goiás; Brasil Fil: Venkatesh, Kavutarapu. Universidade do Vale do Paraíba; Brasil Fil: Fagundes, Paulo Roberto. Universidade do Vale do Paraíba; Brasil Fil: Alves, Mauro Angelo. Instituto Tecnológico de Aeronáutica; Brasil Fil: Gende, Mauricio Alfredo. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - La Plata. Instituto de Astrofísica La Plata. Universidad Nacional de La Plata. Facultad de Ciencias Astronómicas y Geofísicas. Instituto de Astrofísica La Plata; Argentina Fil: Kumar, Sanjay. Banaras Hindu University; India |
| description |
The total electron content (TEC) derived from two Global Positioning System (GPS) receivers localized at Palmas (PAL, 10.2°S, 48.2°W, dip latitude 5.5°S), near equatorial region, and São José dos Campos (SJC, 23.2°S, 45.9°W, dip latitude 17.6°S), under the southern crest of the equatorial ionization anomaly (EIA), in the Brazilian sector are used in this paper. TEC from the latest available IRI-2012 model at the same locations is also used. A comparative study between GPS-TEC and the IRI-2012 model is analyzed during the deep low solar activity period of 2009 in the unusual solar cycle 23. The measurements and the modeled data show that the IRI-TEC model gives the better estimates of the GPS-TEC during the nighttime from January to December months at PAL and SJC. The IRI-TEC model shows larger differences from the GPS-TEC in the afternoon hours, mainly at SJC. These discrepancies observed at SJC in the afternoon hours for all months are possibly due to the dynamics of EIA in consequence of the equatorial fountain effect. At PAL and SJC, oscillations of GPS-TEC with periods around 16 days in April and periods around 27-32 days between September and December possibly are noticed which could be related to a modulation of the semidiurnal tide and Sun’s rotation, respectively. Also, oscillations with periods around 2-4 and 5-10 days from January to December are observed at PAL and SJC, possibly associated with the propagation of planetary waves. |
| publishDate |
2017 |
| dc.date.none.fl_str_mv |
2017-01 |
| dc.type.none.fl_str_mv |
info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion http://purl.org/coar/resource_type/c_6501 info:ar-repo/semantics/articulo |
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article |
| status_str |
publishedVersion |
| dc.identifier.none.fl_str_mv |
http://hdl.handle.net/11336/56844 De Abreu, Alessandro José; Martin, Inácio Malmonge; De Jesus, Rodolfo; Bolzan, Maurício José Alves; Venkatesh, Kavutarapu; et al.; Comparison of GPS-TEC measurements with IRI2012-TEC predictions in the Brazilian sector during the unusual solar minimum 2009; Editrice Compositori Bologna; Annals Of Geophysics; 60; 3; 1-2017 2037-416X 1593-5213 CONICET Digital CONICET |
| url |
http://hdl.handle.net/11336/56844 |
| identifier_str_mv |
De Abreu, Alessandro José; Martin, Inácio Malmonge; De Jesus, Rodolfo; Bolzan, Maurício José Alves; Venkatesh, Kavutarapu; et al.; Comparison of GPS-TEC measurements with IRI2012-TEC predictions in the Brazilian sector during the unusual solar minimum 2009; Editrice Compositori Bologna; Annals Of Geophysics; 60; 3; 1-2017 2037-416X 1593-5213 CONICET Digital CONICET |
| dc.language.none.fl_str_mv |
eng |
| language |
eng |
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info:eu-repo/semantics/altIdentifier/doi/10.4401/ag-7300 info:eu-repo/semantics/altIdentifier/url/https://www.annalsofgeophysics.eu/index.php/annals/article/view/7300 |
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Editrice Compositori Bologna |
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Editrice Compositori Bologna |
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reponame:CONICET Digital (CONICET) instname:Consejo Nacional de Investigaciones Científicas y Técnicas |
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Consejo Nacional de Investigaciones Científicas y Técnicas |
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CONICET Digital (CONICET) - Consejo Nacional de Investigaciones Científicas y Técnicas |
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dasensio@conicet.gov.ar; lcarlino@conicet.gov.ar |
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