scholarly journals Investigation on equinoctial asymmetry observed in Niamey Station Center for Orbit Determination in Europe Total Electron Content (CODG TEC) variation during ~ solar cycle 23

2017 ◽  
Vol 12 (22) ◽  
pp. 308-321
Author(s):  
F. Ouattara ◽  
J. L. Zerbo ◽  
M. Kaboré ◽  
R. Fleury
Keyword(s):  
Solar Cycle ◽  
Total Electron Content ◽  
Orbit Determination ◽  
Electron Content ◽  
Total Electron ◽  
Solar Cycle 23

scholarly journals Spatial, Seasonal, and Solar Cycle Variations of the Martian Total Electron Content (TEC): Is the TEC a Good Tracer for Atmospheric Cycles?

2018 ◽  
Vol 123 (7) ◽  
pp. 1746-1759 ◽  
Author(s):  
Beatriz Sánchez-Cano ◽  
Mark Lester ◽  
Olivier Witasse ◽  
Pierre-Louis Blelly ◽  
Mikel Indurain ◽  
...  
Keyword(s):  
Solar Cycle ◽  
Total Electron Content ◽  
Electron Content ◽  
Total Electron ◽  
Good Tracer

scholarly journals Diurnal, seasonal and solar cycle variation of total electron content and comparison with the IRI-2016 model at Birnin Kebbi

2019 ◽  
Author(s):  
Aghogho Ogwala ◽  
Emmanuel Olufemi Somoye ◽  
Olugbenga Ogunmudimu ◽  
Rasaq Adewemimo Adeniji-Adele ◽  
Eugene Ogheneakpobor Onori ◽  
...  
Keyword(s):  
Solar Cycle ◽  
Diurnal Variation ◽  
Total Electron Content ◽  
Electron Content ◽  
Total Electron ◽  
Equatorial Station ◽  
Solar Cycle Variation ◽  
June Solstice ◽  
December Solstice ◽  
Cycle Dependence

Abstract. Total Electron Content (TEC) is an important ionospheric parameter used to monitor possible space weather impacts on satellite to ground communication and satellite navigation system. TEC is modified in the ionosphere by changing solar Extreme Ultra-Violet (EUV) radiation, geomagnetic storms, and the atmospheric waves that propagate up from the lower atmosphere. Therefore, TEC depends on local time, latitude, longitude, season, geomagnetic conditions, solar cycle activity, and condition of the troposphere. A dual frequency GPS receiver located at an equatorial station, Birnin-Kebbi in Northern Nigeria (geographic location: 12.64° N; 4.22° E), has been used to investigate variation of TEC during the period of 2011 to 2014. We investigate the diurnal, seasonal and solar cycle dependence of observed (OBS) TEC and comparison with latest version of International Reference Ionosphere (IRI-2016) model. On a general note, diurnal variation reveals discrepancies between OBS-TEC and IRI-2016 model for all hours of the day except during the post-midnight hours. Slight post-noon peaks in the daytime maximum and post-sunset decrease and enhancement are observed in the diurnal variation of OBS-TEC of some months. On a seasonal scale, we observed that OBS-TEC values were higher in the equinoxes than the solstices only in 2012. Where as in 2011, September equinox and December solstice recorded higher magnitude followed by March equinox and lowest in June solstice. In 2013, December solstice magnitude was highest, followed by the equinoxes and lowest in June solstice. In 2014, March equinox and December solstice magnitude were higher than September equinox and June solstice magnitude. June solstice consistently recorded the lowest values for all the years. OBS-TEC is found to increase from 2011 to 2014, thus revealing solar cycle dependence.

Sign in / Sign up

Export Citation Format

Share Document