Annual and semiannual variations of vertical total electron content during high solar activity based on GPS observations

Annual, semiannual and seasonal variations of the Vertical Total Electron Content (VTEC) have been investigated during high solar activity in 2000. In this work we use Global IGS VTEC maps and Principal Component Analysis to study spatial and temporal ionospheric variability. The behavior of VTEC va...

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Autores principales: Natali, María Paula, Meza, Amalia Margarita
Formato: Articulo
Lenguaje:Inglés
Publicado: 2011
Materias:
Ciencias Astronómicas
annual variation
ionospheric irregularities
atmospheric electricity
electron density
geomagnetic field
ionosphere
solar activity
spatial variation
Acceso en línea:http://sedici.unlp.edu.ar/handle/10915/34489
http://www.ann-geophys.net/29/865/2011/angeo-29-865-2011.pdf
Aporte de:
SEDICI (UNLP) de Universidad Nacional de La Plata
id I19-R120-10915-34489
record_format dspace
institution Universidad Nacional de La Plata
institution_str I-19
repository_str R-120
collection SEDICI (UNLP)
language Inglés
topic Ciencias Astronómicas
annual variation
ionospheric irregularities
atmospheric electricity
electron density
geomagnetic field
ionosphere
solar activity
spatial variation
spellingShingle Ciencias Astronómicas
annual variation
ionospheric irregularities
atmospheric electricity
electron density
geomagnetic field
ionosphere
solar activity
spatial variation
Natali, María Paula
Meza, Amalia Margarita
Annual and semiannual variations of vertical total electron content during high solar activity based on GPS observations
topic_facet Ciencias Astronómicas
annual variation
ionospheric irregularities
atmospheric electricity
electron density
geomagnetic field
ionosphere
solar activity
spatial variation
description Annual, semiannual and seasonal variations of the Vertical Total Electron Content (VTEC) have been investigated during high solar activity in 2000. In this work we use Global IGS VTEC maps and Principal Component Analysis to study spatial and temporal ionospheric variability. The behavior of VTEC variations at two-hour periods, at noon and at night is analyzed. Particular characteristics associated with each period and the geomagnetic regions are highlighted. The variations at night are smaller than those obtained at noon. At noon it is possible to see patterns of the seasonal variation at high latitude, and patterns of the semiannual anomaly at low latitudes with a slow decrease towards mid latitudes. At night there is no evidence of seasonal or annual anomaly for any region, but it was possible to see the semiannual anomaly at low latitudes with a sudden decrease towards mid latitudes. In general, the semiannual behavior shows Marchg-April equinox at least 40 % higher than September one. Similarities and differences are analyzed also with regard to the same analysis done for a period of low solar activity.
format Articulo
Articulo
author Natali, María Paula
Meza, Amalia Margarita
author_facet Natali, María Paula
Meza, Amalia Margarita
author_sort Natali, María Paula
title Annual and semiannual variations of vertical total electron content during high solar activity based on GPS observations
title_short Annual and semiannual variations of vertical total electron content during high solar activity based on GPS observations
title_full Annual and semiannual variations of vertical total electron content during high solar activity based on GPS observations
title_fullStr Annual and semiannual variations of vertical total electron content during high solar activity based on GPS observations
title_full_unstemmed Annual and semiannual variations of vertical total electron content during high solar activity based on GPS observations
title_sort annual and semiannual variations of vertical total electron content during high solar activity based on gps observations
publishDate 2011
url http://sedici.unlp.edu.ar/handle/10915/34489
http://www.ann-geophys.net/29/865/2011/angeo-29-865-2011.pdf
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