Annual and semiannual VTEC effects at low solar activity based on GPS observations at different geomagnetic latitudes

The aim of this work is the analysis of the annual, semiannual, and seasonal effects in the total electron content (TEC) of the terrestrial atmosphere during low solar activity. Spatial and temporal ionospheric variability are investigated from global International Global Navigation Satellite System...

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Detalles Bibliográficos
Autores principales: Natali, María Paula, Meza, Amalia Margarita
Formato: Articulo
Lenguaje:Inglés
Publicado: 2010
Materias:
Ciencias Astronómicas
Financial data processing
Fourier analysis
Fourier series
Geomagnetism
Global positioning system
Acceso en línea:http://sedici.unlp.edu.ar/handle/10915/82429
Aporte de:
SEDICI (UNLP) de Universidad Nacional de La Plata
id I19-R120-10915-82429
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
Financial data processing
Fourier analysis
Fourier series
Geomagnetism
Global positioning system
spellingShingle Ciencias Astronómicas
Financial data processing
Fourier analysis
Fourier series
Geomagnetism
Global positioning system
Natali, María Paula
Meza, Amalia Margarita
Annual and semiannual VTEC effects at low solar activity based on GPS observations at different geomagnetic latitudes
topic_facet Ciencias Astronómicas
Financial data processing
Fourier analysis
Fourier series
Geomagnetism
Global positioning system
description The aim of this work is the analysis of the annual, semiannual, and seasonal effects in the total electron content (TEC) of the terrestrial atmosphere during low solar activity. Spatial and temporal ionospheric variability are investigated from global International Global Navigation Satellite System Service (IGS) VTEC maps during low solar activity in 2006. Two different techniques, principal component analysis (PCA) and Fourier analysis, are applied to the data set. Applying the PCA technique on a time series of global IGS VTEC maps gives us a method to analyze the main ionospheric anomalies on a global scale. The Fourier series provide us a comparison with the results obtained with PCA. The behavior of VTEC variations at 2 h periods centered at 1200 and 2200 local time (LT) are analyzed. Particular characteristics associated with each period and with the geomagnetic region are highlighted. All the stations show an annual behavior, which means that the maxima variations of the VTEC occur in summer while minimum variations are in winter, except in the stations located at the Northern Hemisphere at noon. Some regions show patterns of the semiannual anomaly during local noon, and it is also possible to see a higher peak of VTEC during spring rather than autumn in the Northern Hemisphere. However, if we analyze the pattern in the Southern Hemisphere, both peaks in equinox are of the same magnitude. Results obtained with Fourier series are comparable with the ones mentioned above.
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 VTEC effects at low solar activity based on GPS observations at different geomagnetic latitudes
title_short Annual and semiannual VTEC effects at low solar activity based on GPS observations at different geomagnetic latitudes
title_full Annual and semiannual VTEC effects at low solar activity based on GPS observations at different geomagnetic latitudes
title_fullStr Annual and semiannual VTEC effects at low solar activity based on GPS observations at different geomagnetic latitudes
title_full_unstemmed Annual and semiannual VTEC effects at low solar activity based on GPS observations at different geomagnetic latitudes
title_sort annual and semiannual vtec effects at low solar activity based on gps observations at different geomagnetic latitudes
publishDate 2010
url http://sedici.unlp.edu.ar/handle/10915/82429
work_keys_str_mv AT natalimariapaula annualandsemiannualvteceffectsatlowsolaractivitybasedongpsobservationsatdifferentgeomagneticlatitudes
AT mezaamaliamargarita annualandsemiannualvteceffectsatlowsolaractivitybasedongpsobservationsatdifferentgeomagneticlatitudes
bdutipo_str Repositorios
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