Day-to-day variability of equatorial electrojet and its role on the day-to-day characteristics of the equatorial ionization anomaly over the Indian and Brazilian sectors

Autores
Venkatesh, K.; Fagundes, P. R.; Prasad, D. S. V. V. D.; Denardini, Clezio Marcos; De Abreu, A. J.; De Jesus, R.; Gende, Mauricio Alfredo
Año de publicación
2015
Idioma
inglés
Tipo de recurso
artículo
Estado
versión publicada
Descripción
The equatorial electrojet (EEJ) is a narrow band of current flowing eastward at the ionospheric E region altitudes along the dayside dip equator. Mutually perpendicular electric and magnetic fields over the equator results in the formation of equatorial ionization anomaly (EIA), which in turn generates large electron density variabilities. Simultaneous study on the characteristics of EEJ and EIA is necessary to understand the role of EEJ on the EIA variabilities. This is helpful for the improved estimation of total electron content (TEC) and range delays required for satellite-based communication and navigation applications. Present study reports simultaneous variations of EEJ and GPS-TEC over Indian and Brazilian sectors to understand the role of EEJ on the day-to-day characteristics of the EIA. Magnetometer measurements during the low solar activity year 2004 are used to derive the EEJ values over the two different sectors. The characteristics of EIA are studied using two different chains of GPS receivers along the common meridian of 77E (India) and 45W (Brazil). The diurnal, seasonal, and day-to-day variations of EEJ and TEC are described simultaneously. Variations of EIA during different seasons are presented along with the variations of the EEJ in the two hemispheres. The role of EEJ variations on the characteristic features of the EIA such as the strength and temporal extent of the EIA crest has also been reported. Further, the time delay between the occurrences of the day maximum EEJ and the well-developed EIA is studied and corresponding results are presented in this paper.
Fil: Venkatesh, K.. Universidade do Vale do Paraiba; Brasil
Fil: Fagundes, P. R.. Universidade do Vale do Paraiba; Brasil
Fil: Prasad, D. S. V. V. D.. Andhra University; India
Fil: Denardini, Clezio Marcos. Centro de Previsao de Tempo e Estudos Climáticos. Instituto Nacional de Pesquisas Espaciais; Brasil
Fil: De Abreu, A. J.. Instituto Tecnológico de Aeronáutica; Brasil
Fil: De Jesus, R.. Universidade do Vale do Paraiba; Brasil. Centro de Previsao de Tempo e Estudos Climáticos. Instituto Nacional de Pesquisas Espaciais; Brasil
Fil: Gende, Mauricio Alfredo. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina. Universidad Nacional de La Plata. Facultad de Ciencias Astronómicas y Geofísicas; Argentina
Materia
ELECTRON DENSITY VARIABILITY
EQUATORIAL AND LOW-LATITUDE IONOSPHERE
EQUATORIAL ELECTROJET (EEJ)
EQUATORIAL IONIZATION ANOMALY (EIA)
Nivel de accesibilidad
acceso abierto
Condiciones de uso
https://creativecommons.org/licenses/by-nc-sa/2.5/ar/
Repositorio
CONICET Digital (CONICET)
Institución
Consejo Nacional de Investigaciones Científicas y Técnicas
OAI Identificador
oai:ri.conicet.gov.ar:11336/53421
Acceder
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oai_identifier_str oai:ri.conicet.gov.ar:11336/53421
network_acronym_str CONICETDig
repository_id_str 3498
network_name_str CONICET Digital (CONICET)
spelling Day-to-day variability of equatorial electrojet and its role on the day-to-day characteristics of the equatorial ionization anomaly over the Indian and Brazilian sectorsVenkatesh, K.Fagundes, P. R.Prasad, D. S. V. V. D.Denardini, Clezio MarcosDe Abreu, A. J.De Jesus, R.Gende, Mauricio AlfredoELECTRON DENSITY VARIABILITYEQUATORIAL AND LOW-LATITUDE IONOSPHEREEQUATORIAL ELECTROJET (EEJ)EQUATORIAL IONIZATION ANOMALY (EIA)https://purl.org/becyt/ford/1.5https://purl.org/becyt/ford/1The equatorial electrojet (EEJ) is a narrow band of current flowing eastward at the ionospheric E region altitudes along the dayside dip equator. Mutually perpendicular electric and magnetic fields over the equator results in the formation of equatorial ionization anomaly (EIA), which in turn generates large electron density variabilities. Simultaneous study on the characteristics of EEJ and EIA is necessary to understand the role of EEJ on the EIA variabilities. This is helpful for the improved estimation of total electron content (TEC) and range delays required for satellite-based communication and navigation applications. Present study reports simultaneous variations of EEJ and GPS-TEC over Indian and Brazilian sectors to understand the role of EEJ on the day-to-day characteristics of the EIA. Magnetometer measurements during the low solar activity year 2004 are used to derive the EEJ values over the two different sectors. The characteristics of EIA are studied using two different chains of GPS receivers along the common meridian of 77E (India) and 45W (Brazil). The diurnal, seasonal, and day-to-day variations of EEJ and TEC are described simultaneously. Variations of EIA during different seasons are presented along with the variations of the EEJ in the two hemispheres. The role of EEJ variations on the characteristic features of the EIA such as the strength and temporal extent of the EIA crest has also been reported. Further, the time delay between the occurrences of the day maximum EEJ and the well-developed EIA is studied and corresponding results are presented in this paper.Fil: Venkatesh, K.. Universidade do Vale do Paraiba; BrasilFil: Fagundes, P. R.. Universidade do Vale do Paraiba; BrasilFil: Prasad, D. S. V. V. D.. Andhra University; IndiaFil: Denardini, Clezio Marcos. Centro de Previsao de Tempo e Estudos Climáticos. Instituto Nacional de Pesquisas Espaciais; BrasilFil: De Abreu, A. J.. Instituto Tecnológico de Aeronáutica; BrasilFil: De Jesus, R.. Universidade do Vale do Paraiba; Brasil. Centro de Previsao de Tempo e Estudos Climáticos. Instituto Nacional de Pesquisas Espaciais; BrasilFil: Gende, Mauricio Alfredo. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina. Universidad Nacional de La Plata. Facultad de Ciencias Astronómicas y Geofísicas; ArgentinaBlackwell Publishing Ltd2015-10info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionhttp://purl.org/coar/resource_type/c_6501info:ar-repo/semantics/articuloapplication/pdfapplication/pdfapplication/pdfhttp://hdl.handle.net/11336/53421Venkatesh, K.; Fagundes, P. R.; Prasad, D. S. V. V. D.; Denardini, Clezio Marcos; De Abreu, A. J.; et al.; Day-to-day variability of equatorial electrojet and its role on the day-to-day characteristics of the equatorial ionization anomaly over the Indian and Brazilian sectors; Blackwell Publishing Ltd; Journal of Geophysical Research A: Space Physics; 120; 10; 10-2015; 9117-91312169-9402CONICET DigitalCONICETenginfo:eu-repo/semantics/altIdentifier/doi/10.1002/2015JA021307info:eu-repo/semantics/altIdentifier/url/https://agupubs.onlinelibrary.wiley.com/doi/abs/10.1002/2015JA021307info:eu-repo/semantics/openAccesshttps://creativecommons.org/licenses/by-nc-sa/2.5/ar/reponame:CONICET Digital (CONICET)instname:Consejo Nacional de Investigaciones Científicas y Técnicas2025-09-29T09:51:59Zoai:ri.conicet.gov.ar:11336/53421instacron: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:34982025-09-29 09:52:00.017CONICET Digital (CONICET) - Consejo Nacional de Investigaciones Científicas y Técnicasfalse
dc.title.none.fl_str_mv Day-to-day variability of equatorial electrojet and its role on the day-to-day characteristics of the equatorial ionization anomaly over the Indian and Brazilian sectors
title Day-to-day variability of equatorial electrojet and its role on the day-to-day characteristics of the equatorial ionization anomaly over the Indian and Brazilian sectors
spellingShingle Day-to-day variability of equatorial electrojet and its role on the day-to-day characteristics of the equatorial ionization anomaly over the Indian and Brazilian sectors
Venkatesh, K.
ELECTRON DENSITY VARIABILITY
EQUATORIAL AND LOW-LATITUDE IONOSPHERE
EQUATORIAL ELECTROJET (EEJ)
EQUATORIAL IONIZATION ANOMALY (EIA)
title_short Day-to-day variability of equatorial electrojet and its role on the day-to-day characteristics of the equatorial ionization anomaly over the Indian and Brazilian sectors
title_full Day-to-day variability of equatorial electrojet and its role on the day-to-day characteristics of the equatorial ionization anomaly over the Indian and Brazilian sectors
title_fullStr Day-to-day variability of equatorial electrojet and its role on the day-to-day characteristics of the equatorial ionization anomaly over the Indian and Brazilian sectors
title_full_unstemmed Day-to-day variability of equatorial electrojet and its role on the day-to-day characteristics of the equatorial ionization anomaly over the Indian and Brazilian sectors
title_sort Day-to-day variability of equatorial electrojet and its role on the day-to-day characteristics of the equatorial ionization anomaly over the Indian and Brazilian sectors
dc.creator.none.fl_str_mv Venkatesh, K.
Fagundes, P. R.
Prasad, D. S. V. V. D.
Denardini, Clezio Marcos
De Abreu, A. J.
De Jesus, R.
Gende, Mauricio Alfredo
author Venkatesh, K.
author_facet Venkatesh, K.
Fagundes, P. R.
Prasad, D. S. V. V. D.
Denardini, Clezio Marcos
De Abreu, A. J.
De Jesus, R.
Gende, Mauricio Alfredo
author_role author
author2 Fagundes, P. R.
Prasad, D. S. V. V. D.
Denardini, Clezio Marcos
De Abreu, A. J.
De Jesus, R.
Gende, Mauricio Alfredo
author2_role author
author
author
author
author
author
dc.subject.none.fl_str_mv ELECTRON DENSITY VARIABILITY
EQUATORIAL AND LOW-LATITUDE IONOSPHERE
EQUATORIAL ELECTROJET (EEJ)
EQUATORIAL IONIZATION ANOMALY (EIA)
topic ELECTRON DENSITY VARIABILITY
EQUATORIAL AND LOW-LATITUDE IONOSPHERE
EQUATORIAL ELECTROJET (EEJ)
EQUATORIAL IONIZATION ANOMALY (EIA)
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 equatorial electrojet (EEJ) is a narrow band of current flowing eastward at the ionospheric E region altitudes along the dayside dip equator. Mutually perpendicular electric and magnetic fields over the equator results in the formation of equatorial ionization anomaly (EIA), which in turn generates large electron density variabilities. Simultaneous study on the characteristics of EEJ and EIA is necessary to understand the role of EEJ on the EIA variabilities. This is helpful for the improved estimation of total electron content (TEC) and range delays required for satellite-based communication and navigation applications. Present study reports simultaneous variations of EEJ and GPS-TEC over Indian and Brazilian sectors to understand the role of EEJ on the day-to-day characteristics of the EIA. Magnetometer measurements during the low solar activity year 2004 are used to derive the EEJ values over the two different sectors. The characteristics of EIA are studied using two different chains of GPS receivers along the common meridian of 77E (India) and 45W (Brazil). The diurnal, seasonal, and day-to-day variations of EEJ and TEC are described simultaneously. Variations of EIA during different seasons are presented along with the variations of the EEJ in the two hemispheres. The role of EEJ variations on the characteristic features of the EIA such as the strength and temporal extent of the EIA crest has also been reported. Further, the time delay between the occurrences of the day maximum EEJ and the well-developed EIA is studied and corresponding results are presented in this paper.
Fil: Venkatesh, K.. Universidade do Vale do Paraiba; Brasil
Fil: Fagundes, P. R.. Universidade do Vale do Paraiba; Brasil
Fil: Prasad, D. S. V. V. D.. Andhra University; India
Fil: Denardini, Clezio Marcos. Centro de Previsao de Tempo e Estudos Climáticos. Instituto Nacional de Pesquisas Espaciais; Brasil
Fil: De Abreu, A. J.. Instituto Tecnológico de Aeronáutica; Brasil
Fil: De Jesus, R.. Universidade do Vale do Paraiba; Brasil. Centro de Previsao de Tempo e Estudos Climáticos. Instituto Nacional de Pesquisas Espaciais; Brasil
Fil: Gende, Mauricio Alfredo. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina. Universidad Nacional de La Plata. Facultad de Ciencias Astronómicas y Geofísicas; Argentina
description The equatorial electrojet (EEJ) is a narrow band of current flowing eastward at the ionospheric E region altitudes along the dayside dip equator. Mutually perpendicular electric and magnetic fields over the equator results in the formation of equatorial ionization anomaly (EIA), which in turn generates large electron density variabilities. Simultaneous study on the characteristics of EEJ and EIA is necessary to understand the role of EEJ on the EIA variabilities. This is helpful for the improved estimation of total electron content (TEC) and range delays required for satellite-based communication and navigation applications. Present study reports simultaneous variations of EEJ and GPS-TEC over Indian and Brazilian sectors to understand the role of EEJ on the day-to-day characteristics of the EIA. Magnetometer measurements during the low solar activity year 2004 are used to derive the EEJ values over the two different sectors. The characteristics of EIA are studied using two different chains of GPS receivers along the common meridian of 77E (India) and 45W (Brazil). The diurnal, seasonal, and day-to-day variations of EEJ and TEC are described simultaneously. Variations of EIA during different seasons are presented along with the variations of the EEJ in the two hemispheres. The role of EEJ variations on the characteristic features of the EIA such as the strength and temporal extent of the EIA crest has also been reported. Further, the time delay between the occurrences of the day maximum EEJ and the well-developed EIA is studied and corresponding results are presented in this paper.
publishDate 2015
dc.date.none.fl_str_mv 2015-10
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
format article
status_str publishedVersion
dc.identifier.none.fl_str_mv http://hdl.handle.net/11336/53421
Venkatesh, K.; Fagundes, P. R.; Prasad, D. S. V. V. D.; Denardini, Clezio Marcos; De Abreu, A. J.; et al.; Day-to-day variability of equatorial electrojet and its role on the day-to-day characteristics of the equatorial ionization anomaly over the Indian and Brazilian sectors; Blackwell Publishing Ltd; Journal of Geophysical Research A: Space Physics; 120; 10; 10-2015; 9117-9131
2169-9402
CONICET Digital
CONICET
url http://hdl.handle.net/11336/53421
identifier_str_mv Venkatesh, K.; Fagundes, P. R.; Prasad, D. S. V. V. D.; Denardini, Clezio Marcos; De Abreu, A. J.; et al.; Day-to-day variability of equatorial electrojet and its role on the day-to-day characteristics of the equatorial ionization anomaly over the Indian and Brazilian sectors; Blackwell Publishing Ltd; Journal of Geophysical Research A: Space Physics; 120; 10; 10-2015; 9117-9131
2169-9402
CONICET Digital
CONICET
dc.language.none.fl_str_mv eng
language eng
dc.relation.none.fl_str_mv info:eu-repo/semantics/altIdentifier/doi/10.1002/2015JA021307
info:eu-repo/semantics/altIdentifier/url/https://agupubs.onlinelibrary.wiley.com/doi/abs/10.1002/2015JA021307
dc.rights.none.fl_str_mv info:eu-repo/semantics/openAccess
https://creativecommons.org/licenses/by-nc-sa/2.5/ar/
eu_rights_str_mv openAccess
rights_invalid_str_mv https://creativecommons.org/licenses/by-nc-sa/2.5/ar/
dc.format.none.fl_str_mv application/pdf
application/pdf
application/pdf
dc.publisher.none.fl_str_mv Blackwell Publishing Ltd
publisher.none.fl_str_mv Blackwell Publishing Ltd
dc.source.none.fl_str_mv reponame:CONICET Digital (CONICET)
instname:Consejo Nacional de Investigaciones Científicas y Técnicas
reponame_str CONICET Digital (CONICET)
collection CONICET Digital (CONICET)
instname_str Consejo Nacional de Investigaciones Científicas y Técnicas
repository.name.fl_str_mv CONICET Digital (CONICET) - Consejo Nacional de Investigaciones Científicas y Técnicas
repository.mail.fl_str_mv dasensio@conicet.gov.ar; lcarlino@conicet.gov.ar
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score 13.070432

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