Optimization of NeQuick 2 TEC Predictions over Nigeria using Solar Flux

Abstract

In this study, optimization of NeQuick 2 TEC predictions over Nigeria using the Solar Flux at 10.7 cm was
investigated. Measured F10.7 was compared with those estimated by NEQUICK 2 model. It was observed
that optimal F10.7 was not always in agreement with those measurements at solstice. Observed F10.7
variability was compared with optimal F10.7 variability at all stations for a period of four years. The result
from this work gives an idea on the spatial and temporal distribution of observed F10.7 and optimal F10.7
values at various ionospheric stations over Nigeria, which in turn will be useful tool for communication,
aviation sectors, military defense and space weather researchers in estimating ionospheric behaviors
necessary for direction findings, correction of ionospheric effects on positioning and navigation systems.
Above all this work shows that in spite of the high activities in the Sun, there are appreciable F10.7 variations
over the Nigerian ionosphere with high F10.7 values in the equinoctial months. A Study of the variability of
observed F10.7 and optimal F10.7 from NEQUICK model predictions at different region during different
solar and geomagnetic conditions is suggested for further works.