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dc.contributor.author
Natali, Maria Paula
dc.contributor.author
Meza, A.
dc.date.available
2023-05-05T11:09:27Z
dc.date.issued
2011-05
dc.identifier.citation
Natali, Maria Paula; Meza, A.; Annual and semiannual variations of vertical total electron content during high solar activity based on GPS observations; Copernicus Publications; Annales Geophysicae; 29; 5; 5-2011; 865-873
dc.identifier.issn
0992-7689
dc.identifier.uri
http://hdl.handle.net/11336/196387
dc.description.abstract
Annual, semiannual and seasonal variations of theVertical Total Electron Content (VTEC) have been investigatedduring high solar activity in 2000. In this work we useGlobal IGS VTEC maps and Principal Component Analysisto study spatial and temporal ionospheric variability. The behaviorof VTEC variations at two-hour periods, at noon andat night is analyzed. Particular characteristics associated witheach period and the geomagnetic regions are highlighted.The variations at night are smaller than those obtained atnoon. At noon it is possible to see patterns of the seasonalvariation at high latitude, and patterns of the semiannualanomaly at low latitudes with a slow decrease towards midlatitudes. At night there is no evidence of seasonal or annualanomaly for any region, but it was possible to see the semiannualanomaly at low latitudes with a sudden decrease towardsmid latitudes. In general, the semiannual behavior showsMarch–April equinox at least 40% higher than Septemberone. Similarities and differences are analyzed also with regardto the same analysis done for a period of low solar activity.
dc.format
application/pdf
dc.language.iso
eng
dc.publisher
Copernicus Publications
dc.rights
info:eu-repo/semantics/openAccess
dc.rights.uri
https://creativecommons.org/licenses/by/2.5/ar/
dc.subject
ionosphere
dc.subject
ionospheric irregularities
dc.subject.classification
Meteorología y Ciencias Atmosféricas
dc.subject.classification
Ciencias de la Tierra y relacionadas con el Medio Ambiente
dc.subject.classification
CIENCIAS NATURALES Y EXACTAS
dc.title
Annual and semiannual variations of vertical total electron content during high solar activity based on GPS observations
dc.type
info:eu-repo/semantics/article
dc.type
info:ar-repo/semantics/artículo
dc.type
info:eu-repo/semantics/publishedVersion
dc.date.updated
2023-04-10T10:07:51Z
dc.identifier.eissn
1432-0576
dc.journal.volume
29
dc.journal.number
5
dc.journal.pagination
865-873
dc.journal.pais
Alemania
dc.journal.ciudad
Gottingen
dc.description.fil
Fil: Natali, Maria Paula. Universidad Nacional de La Plata. Facultad de Ciencias Astronómicas y Geofísicas; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - La Plata; Argentina
dc.description.fil
Fil: Meza, A.. Universidad Nacional de La Plata. Facultad de Ciencias Astronómicas y Geofísicas; Argentina
dc.journal.title
Annales Geophysicae
dc.relation.alternativeid
info:eu-repo/semantics/altIdentifier/url/https://angeo.copernicus.org/articles/29/865/2011/
dc.relation.alternativeid
info:eu-repo/semantics/altIdentifier/doi/http://dx.doi.org/10.5194/angeo-29-865-2011
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