Characterization of GPS total electron content (GPS-TEC) in Antarctica from 2004 to 2011

The vertical total electron content (VTEC) obtained from 2004 to 2011 at Comandante Ferraz Brazilian Antarctic Station (62.1°S, 58.4°W) is analyzed to study the mean diurnal, seasonal and annual variations. The maximum daytime VTEC had an annual variation that decreased from 2004 to 2008, and then s...

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Bibliographic Details
Published in:Annals of Geophysics
Main Authors: Correia, Emília, Paz, Amanda Junqueira, Gende, Mauricio A.
Format: Article in Journal/Newspaper
Language:English
Published: Istituto Nazionale di Geofisica e Vulcanologia, INGV 2013
Subjects:
Ionosphere
Total electron content
Seasonal variation
Solar cycle
Wave propagation
Solar-terrestrial interaction
Antarctic
Ferraz
Antarc*
Antarctica
Online Access:https://www.annalsofgeophysics.eu/index.php/annals/article/view/6223
https://doi.org/10.4401/ag-6223
Description
Summary:The vertical total electron content (VTEC) obtained from 2004 to 2011 at Comandante Ferraz Brazilian Antarctic Station (62.1°S, 58.4°W) is analyzed to study the mean diurnal, seasonal and annual variations. The maximum daytime VTEC had an annual variation that decreased from 2004 to 2008, and then starting to increase in 2009, which followed the variation of the solar activity. The daily VTEC shows good linear correlation with solar radiation intensity, which is also dependent on the solar zenithal angle. The mean diurnal VTEC shows a semiannual variation, with larger peaks in equinoxes for all years; no winter anomaly was observed, and in summer, there was no clear diurnal variation. The semiannual variation of the VTEC is also modulated by solar activity, with larger VTEC peaks when the solar activity was higher.

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