Open AccessTransient Variations of Total Electron Content (TEC) Over a Terrestrial Point within Magnetic Anomaly Region
Author(s) -
Rufus Sola Fayose
Publication year - 2021
Publication title -
advances in research
Language(s) - English
Resource type - Journals
ISSN - 2348-0394
DOI - 10.9734/air/2021/v22i330299
Subject(s) - tec , total electron content , anomaly (physics) , atmospheric sciences , environmental science , ionosphere , solar maximum , daytime , diurnal temperature variation , correlation coefficient , morning , geodesy , solar cycle , solar minimum , latitude , physics , geology , geophysics , mathematics , astronomy , solar wind , statistics , quantum mechanics , magnetic field , condensed matter physics
This paper investigate the variability of Total Electron Content TEC over a terrestrial point within equatorial anomaly region using the NovAtel GSV 4000B GPS-SCINDA system at Akure (7.3°N, 5.2°E), Nigeria. This system is capable of tracking up to 14 GPS satellites simultaneously. Total Electron Content (TEC) over equatorial region using a real time data collected via a GPS-SCINDA facility were analyzed to study the ionospheric variations in terms of Total Electron Content (TEC) for the period of three years. Diurnal variations and Monthly mean variations of Total Electron Content within the equatorial anomaly region were examined. The diurnal variation of TEC showed pre-dawn minimum for a short period of time, followed by a steep early morning increase and then reached maximum value between 14:00 UT and 16:00 UT. The influence of solar activity on VTEC was investigated by taking the correlation coefficients between VTEC, F10.7cm radio flux index and sunspot numbers. The range of solar flux variation during the period of observation is very limited; there is high positive correlation (Correlation Coefficient 0.61) between daytime peak TEC and the solar F10.7 flux.