Lower ionosphere monitoring by the South America VLF Network (SAVNET): C region occurrence and atmospheric temperature variability

Autores
Perin Bertoni, Fernando Celso; Raulin, Jean Pierre; Rivero Gavilán, Hernán; Kaufmann, Pierre; Rodriguez, Rodolfo; Clilverd, Mark; Samanes Cárdenas, Jorge; Fernandez, German Enzo Leonel
Año de publicación
2013
Idioma
inglés
Tipo de recurso
artículo
Estado
versión publicada
Descripción
Daily profiles of phase measurements as observed on fixed VLF paths generally show a transient phase advance, followed by a phase delay, for about 90 min after sunrise hours. This is indicative of a reflecting ionospheric C region developing along the terminator line at an altitude below the normal D region. The suggested occurrence of a C region is consistent with rocket measurements made in the 1960s, showing a maximum of the electron density between 64 and 68 km, and by radio sounding in the 1980s. In order to correctly describe the properties of the phase effect associated with the presence of a C region, it is important to understand the subionospheric propagation characteristics of the VLF paths. In this paper, we analyze the variations presented by the temporal properties of the VLF narrowband phase effect and determined a parameter associated with the appearance of the C region at sunrise hours observed by receivers from the South America VLF Network. Periodic patterns emerge from the parameter curves. Two distinct temporal behavior regimes can be identified: one exhibiting slow variations between March and October, and another one exhibiting faster variations between October and March. Solar illumination conditions and the geometrical configuration of the VLF paths relative to the sunrise terminator partly explain the slow variation regime. During periods of faster variations, we have observed good association with atmospheric temperature variability found in the measurements of the Thermosphere Ionosphere Mesosphere Energetics and Dynamics and Sounding of the Atmosphere using Broadband Emission Radiometry satellite instrument, which we assume to be related to the winter anomaly atmospheric phenomenon. However, when comparing the parameter time series with temperature curves, no direct one-to-one correspondence was found for transient events.
Fil: Perin Bertoni, Fernando Celso. Universidade Presbiteriana Mackenzie. Escola de Engenharia. Centro de Radio Astronomia E Astrofisica; Brasil
Fil: Raulin, Jean Pierre. Universidade Presbiteriana Mackenzie. Escola de Engenharia. Centro de Radio Astronomia E Astrofisica; Brasil
Fil: Rivero Gavilán, Hernán. Universidade Presbiteriana Mackenzie. Escola de Engenharia. Centro de Radio Astronomia E Astrofisica; Brasil. Ministério da Ciência e Tecnologia. Instituto Nacional de Pesquisas Espaciais; Brasil
Fil: Kaufmann, Pierre. Universidade Presbiteriana Mackenzie. Escola de Engenharia. Centro de Radio Astronomia E Astrofisica; Brasil
Fil: Rodriguez, Rodolfo. Universidad de Piura; Perú
Fil: Clilverd, Mark. University Of Cambridge; Reino Unido
Fil: Samanes Cárdenas, Jorge. Universidade Presbiteriana Mackenzie. Escola de Engenharia. Centro de Radio Astronomia E Astrofisica; Brasil
Fil: Fernandez, German Enzo Leonel. Consejo Nacional de Investigaciones Cientíâ­ficas y Técnicas. Centro Cientíâ­fico Tecnológico San Juan. Complejo Astronómico "el Leoncito"; Argentina
Materia
IONOSPHERE
VLF TECHNIQUE
SOLAR MONITORING
UPPER AND LOWER ATMOSPHERE INTERACTION
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:11336/8922
Acceder
id CONICETDig_df5e5d945dfb55a13369480b2a5a5a04
oai_identifier_str oai:ri.conicet.gov.ar:11336/8922
network_acronym_str CONICETDig
repository_id_str 3498
network_name_str CONICET Digital (CONICET)
spelling Lower ionosphere monitoring by the South America VLF Network (SAVNET): C region occurrence and atmospheric temperature variabilityPerin Bertoni, Fernando CelsoRaulin, Jean PierreRivero Gavilán, HernánKaufmann, PierreRodriguez, RodolfoClilverd, MarkSamanes Cárdenas, JorgeFernandez, German Enzo LeonelIONOSPHEREVLF TECHNIQUESOLAR MONITORINGUPPER AND LOWER ATMOSPHERE INTERACTIONhttps://purl.org/becyt/ford/1.5https://purl.org/becyt/ford/1https://purl.org/becyt/ford/2.2https://purl.org/becyt/ford/2Daily profiles of phase measurements as observed on fixed VLF paths generally show a transient phase advance, followed by a phase delay, for about 90 min after sunrise hours. This is indicative of a reflecting ionospheric C region developing along the terminator line at an altitude below the normal D region. The suggested occurrence of a C region is consistent with rocket measurements made in the 1960s, showing a maximum of the electron density between 64 and 68 km, and by radio sounding in the 1980s. In order to correctly describe the properties of the phase effect associated with the presence of a C region, it is important to understand the subionospheric propagation characteristics of the VLF paths. In this paper, we analyze the variations presented by the temporal properties of the VLF narrowband phase effect and determined a parameter associated with the appearance of the C region at sunrise hours observed by receivers from the South America VLF Network. Periodic patterns emerge from the parameter curves. Two distinct temporal behavior regimes can be identified: one exhibiting slow variations between March and October, and another one exhibiting faster variations between October and March. Solar illumination conditions and the geometrical configuration of the VLF paths relative to the sunrise terminator partly explain the slow variation regime. During periods of faster variations, we have observed good association with atmospheric temperature variability found in the measurements of the Thermosphere Ionosphere Mesosphere Energetics and Dynamics and Sounding of the Atmosphere using Broadband Emission Radiometry satellite instrument, which we assume to be related to the winter anomaly atmospheric phenomenon. However, when comparing the parameter time series with temperature curves, no direct one-to-one correspondence was found for transient events.Fil: Perin Bertoni, Fernando Celso. Universidade Presbiteriana Mackenzie. Escola de Engenharia. Centro de Radio Astronomia E Astrofisica; BrasilFil: Raulin, Jean Pierre. Universidade Presbiteriana Mackenzie. Escola de Engenharia. Centro de Radio Astronomia E Astrofisica; BrasilFil: Rivero Gavilán, Hernán. Universidade Presbiteriana Mackenzie. Escola de Engenharia. Centro de Radio Astronomia E Astrofisica; Brasil. Ministério da Ciência e Tecnologia. Instituto Nacional de Pesquisas Espaciais; BrasilFil: Kaufmann, Pierre. Universidade Presbiteriana Mackenzie. Escola de Engenharia. Centro de Radio Astronomia E Astrofisica; BrasilFil: Rodriguez, Rodolfo. Universidad de Piura; PerúFil: Clilverd, Mark. University Of Cambridge; Reino UnidoFil: Samanes Cárdenas, Jorge. Universidade Presbiteriana Mackenzie. Escola de Engenharia. Centro de Radio Astronomia E Astrofisica; BrasilFil: Fernandez, German Enzo Leonel. Consejo Nacional de Investigaciones Cientíâ­ficas y Técnicas. Centro Cientíâ­fico Tecnológico San Juan. Complejo Astronómico "el Leoncito"; ArgentinaAmerican Geophysical Union2013-10info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionhttp://purl.org/coar/resource_type/c_6501info:ar-repo/semantics/articuloapplication/pdfapplication/pdfhttp://hdl.handle.net/11336/8922Perin Bertoni, Fernando Celso; Raulin, Jean Pierre; Rivero Gavilán, Hernán; Kaufmann, Pierre; Rodriguez, Rodolfo; et al.; Lower ionosphere monitoring by the South America VLF Network (SAVNET): C region occurrence and atmospheric temperature variability; American Geophysical Union; Journal Of Geophysical Research; 118; 10; 10-2013; 6686-66930148-0227enginfo:eu-repo/semantics/altIdentifier/url/http://onlinelibrary.wiley.com/doi/10.1002/jgra.50559/fullinfo:eu-repo/semantics/altIdentifier/doi/10.1002/jgra.50559info:eu-repo/semantics/openAccesshttps://creativecommons.org/licenses/by-nc-sa/2.5/ar/reponame:CONICET Digital (CONICET)instname:Consejo Nacional de Investigaciones Científicas y Técnicas2025-09-29T10:35:10Zoai:ri.conicet.gov.ar:11336/8922instacron: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 10:35:10.348CONICET Digital (CONICET) - Consejo Nacional de Investigaciones Científicas y Técnicasfalse
dc.title.none.fl_str_mv Lower ionosphere monitoring by the South America VLF Network (SAVNET): C region occurrence and atmospheric temperature variability
title Lower ionosphere monitoring by the South America VLF Network (SAVNET): C region occurrence and atmospheric temperature variability
spellingShingle Lower ionosphere monitoring by the South America VLF Network (SAVNET): C region occurrence and atmospheric temperature variability
Perin Bertoni, Fernando Celso
IONOSPHERE
VLF TECHNIQUE
SOLAR MONITORING
UPPER AND LOWER ATMOSPHERE INTERACTION
title_short Lower ionosphere monitoring by the South America VLF Network (SAVNET): C region occurrence and atmospheric temperature variability
title_full Lower ionosphere monitoring by the South America VLF Network (SAVNET): C region occurrence and atmospheric temperature variability
title_fullStr Lower ionosphere monitoring by the South America VLF Network (SAVNET): C region occurrence and atmospheric temperature variability
title_full_unstemmed Lower ionosphere monitoring by the South America VLF Network (SAVNET): C region occurrence and atmospheric temperature variability
title_sort Lower ionosphere monitoring by the South America VLF Network (SAVNET): C region occurrence and atmospheric temperature variability
dc.creator.none.fl_str_mv Perin Bertoni, Fernando Celso
Raulin, Jean Pierre
Rivero Gavilán, Hernán
Kaufmann, Pierre
Rodriguez, Rodolfo
Clilverd, Mark
Samanes Cárdenas, Jorge
Fernandez, German Enzo Leonel
author Perin Bertoni, Fernando Celso
author_facet Perin Bertoni, Fernando Celso
Raulin, Jean Pierre
Rivero Gavilán, Hernán
Kaufmann, Pierre
Rodriguez, Rodolfo
Clilverd, Mark
Samanes Cárdenas, Jorge
Fernandez, German Enzo Leonel
author_role author
author2 Raulin, Jean Pierre
Rivero Gavilán, Hernán
Kaufmann, Pierre
Rodriguez, Rodolfo
Clilverd, Mark
Samanes Cárdenas, Jorge
Fernandez, German Enzo Leonel
author2_role author
author
author
author
author
author
author
dc.subject.none.fl_str_mv IONOSPHERE
VLF TECHNIQUE
SOLAR MONITORING
UPPER AND LOWER ATMOSPHERE INTERACTION
topic IONOSPHERE
VLF TECHNIQUE
SOLAR MONITORING
UPPER AND LOWER ATMOSPHERE INTERACTION
purl_subject.fl_str_mv https://purl.org/becyt/ford/1.5
https://purl.org/becyt/ford/1
https://purl.org/becyt/ford/2.2
https://purl.org/becyt/ford/2
dc.description.none.fl_txt_mv Daily profiles of phase measurements as observed on fixed VLF paths generally show a transient phase advance, followed by a phase delay, for about 90 min after sunrise hours. This is indicative of a reflecting ionospheric C region developing along the terminator line at an altitude below the normal D region. The suggested occurrence of a C region is consistent with rocket measurements made in the 1960s, showing a maximum of the electron density between 64 and 68 km, and by radio sounding in the 1980s. In order to correctly describe the properties of the phase effect associated with the presence of a C region, it is important to understand the subionospheric propagation characteristics of the VLF paths. In this paper, we analyze the variations presented by the temporal properties of the VLF narrowband phase effect and determined a parameter associated with the appearance of the C region at sunrise hours observed by receivers from the South America VLF Network. Periodic patterns emerge from the parameter curves. Two distinct temporal behavior regimes can be identified: one exhibiting slow variations between March and October, and another one exhibiting faster variations between October and March. Solar illumination conditions and the geometrical configuration of the VLF paths relative to the sunrise terminator partly explain the slow variation regime. During periods of faster variations, we have observed good association with atmospheric temperature variability found in the measurements of the Thermosphere Ionosphere Mesosphere Energetics and Dynamics and Sounding of the Atmosphere using Broadband Emission Radiometry satellite instrument, which we assume to be related to the winter anomaly atmospheric phenomenon. However, when comparing the parameter time series with temperature curves, no direct one-to-one correspondence was found for transient events.
Fil: Perin Bertoni, Fernando Celso. Universidade Presbiteriana Mackenzie. Escola de Engenharia. Centro de Radio Astronomia E Astrofisica; Brasil
Fil: Raulin, Jean Pierre. Universidade Presbiteriana Mackenzie. Escola de Engenharia. Centro de Radio Astronomia E Astrofisica; Brasil
Fil: Rivero Gavilán, Hernán. Universidade Presbiteriana Mackenzie. Escola de Engenharia. Centro de Radio Astronomia E Astrofisica; Brasil. Ministério da Ciência e Tecnologia. Instituto Nacional de Pesquisas Espaciais; Brasil
Fil: Kaufmann, Pierre. Universidade Presbiteriana Mackenzie. Escola de Engenharia. Centro de Radio Astronomia E Astrofisica; Brasil
Fil: Rodriguez, Rodolfo. Universidad de Piura; Perú
Fil: Clilverd, Mark. University Of Cambridge; Reino Unido
Fil: Samanes Cárdenas, Jorge. Universidade Presbiteriana Mackenzie. Escola de Engenharia. Centro de Radio Astronomia E Astrofisica; Brasil
Fil: Fernandez, German Enzo Leonel. Consejo Nacional de Investigaciones Cientíâ­ficas y Técnicas. Centro Cientíâ­fico Tecnológico San Juan. Complejo Astronómico "el Leoncito"; Argentina
description Daily profiles of phase measurements as observed on fixed VLF paths generally show a transient phase advance, followed by a phase delay, for about 90 min after sunrise hours. This is indicative of a reflecting ionospheric C region developing along the terminator line at an altitude below the normal D region. The suggested occurrence of a C region is consistent with rocket measurements made in the 1960s, showing a maximum of the electron density between 64 and 68 km, and by radio sounding in the 1980s. In order to correctly describe the properties of the phase effect associated with the presence of a C region, it is important to understand the subionospheric propagation characteristics of the VLF paths. In this paper, we analyze the variations presented by the temporal properties of the VLF narrowband phase effect and determined a parameter associated with the appearance of the C region at sunrise hours observed by receivers from the South America VLF Network. Periodic patterns emerge from the parameter curves. Two distinct temporal behavior regimes can be identified: one exhibiting slow variations between March and October, and another one exhibiting faster variations between October and March. Solar illumination conditions and the geometrical configuration of the VLF paths relative to the sunrise terminator partly explain the slow variation regime. During periods of faster variations, we have observed good association with atmospheric temperature variability found in the measurements of the Thermosphere Ionosphere Mesosphere Energetics and Dynamics and Sounding of the Atmosphere using Broadband Emission Radiometry satellite instrument, which we assume to be related to the winter anomaly atmospheric phenomenon. However, when comparing the parameter time series with temperature curves, no direct one-to-one correspondence was found for transient events.
publishDate 2013
dc.date.none.fl_str_mv 2013-10
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/11336/8922
Perin Bertoni, Fernando Celso; Raulin, Jean Pierre; Rivero Gavilán, Hernán; Kaufmann, Pierre; Rodriguez, Rodolfo; et al.; Lower ionosphere monitoring by the South America VLF Network (SAVNET): C region occurrence and atmospheric temperature variability; American Geophysical Union; Journal Of Geophysical Research; 118; 10; 10-2013; 6686-6693
0148-0227
url http://hdl.handle.net/11336/8922
identifier_str_mv Perin Bertoni, Fernando Celso; Raulin, Jean Pierre; Rivero Gavilán, Hernán; Kaufmann, Pierre; Rodriguez, Rodolfo; et al.; Lower ionosphere monitoring by the South America VLF Network (SAVNET): C region occurrence and atmospheric temperature variability; American Geophysical Union; Journal Of Geophysical Research; 118; 10; 10-2013; 6686-6693
0148-0227
dc.language.none.fl_str_mv eng
language eng
dc.relation.none.fl_str_mv info:eu-repo/semantics/altIdentifier/url/http://onlinelibrary.wiley.com/doi/10.1002/jgra.50559/full
info:eu-repo/semantics/altIdentifier/doi/10.1002/jgra.50559
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
dc.publisher.none.fl_str_mv American Geophysical Union
publisher.none.fl_str_mv American Geophysical Union
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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