Search Results - "Adeniyi, J.O."

Morphology of the equatorial ionization anomaly in Africa and Middle East due to a sudden stratospheric warming event by Bolaji, O.S., Oyeyemi, E.O., Jimoh, O.E., Fujimoto, A., Doherty, P.H., Owolabi, O.P., Adeniyi, J.O., Falayi, E.O., Abe, E., Kaka, R.O., Kotoye, A.

“…Using total electron content (TEC) data deduced from 18 Global Positioning System (GPS) receivers in Africa and Middle East, we investigated the morphology of…”
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F2-layer height of the peak electron density (hmF2) dataset employed in Inferring Vertical Plasma Drift – Data of Best fit by Adebesin, B.O., Adeniyi, J.O.

“…In this data article, analysis of the height of the peak electron density (hmF2) data, used to compute the vertical plasma drift (Vz) velocities during year…”
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F2 layer characteristics and electrojet strength over an equatorial station by Adebesin, B.O., Adeniyi, J.O., Adimula, I.A., Reinisch, B.W., Yumoto, K.

“…•Variables used are hmF2, NmF2 and EEJ current strength.•The relationship between the parameters was extensively discussed.•The seasonal variations were also…”
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Comparison between African equatorial station ground-based inferred vertical E×B drift, Jicamarca direct measured drift, and IRI model by Adeniyi, J.O., Adebesin, B.O., Adimula, I.A., Oladipo, O.A., Olawepo, A.O., Ikubanni, S.O., Reinisch, B.W.

“…•Study area was an Africa equatorial station during period of solar minima.•Ground-based hmF2 inferred vertical drift was compared with IRI model-2007; and…”
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Latitudinal Variation of α‐Chapman Scale Height During Quiet and Disturbed Geomagnetic Conditions by Adebiyi, S. J., Adeniyi, J.O., Ikubanni, S. O., Adebesin, B. O., Adekoya, B. J., Joshua, B. W.

“…Scale height is an important ionospheric parameter which determines the shape of the topside electron density profile. In this paper, the latitudinal variation…”
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Storm time IRI-Plas model forecast for an African equatorial station by Adebiyi, S.J., Ikubanni, S.O., Adebesin, B.O., Adeniyi, J.O., Joshua, B.W., Adimula, I.A., Oladipo, O.A., Olawepo, A.O., Adekoya, B.J.

“…The limitation of ionospheric models in describing short-term ionospheric events has led to the development of data assimilative models e.g. the International…”
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NeQuick bottomside analysis at low latitudes by Coïsson, P., Nava, B., Radicella, S.M., Oladipo, O.A., Adeniyi, J.O., Gopi Krishna, S., Rama Rao, P.V.S., Ravindran, S.

“…NeQuick ionospheric electron density model produces the full electron density profile in the ionosphere using the F2 layer peak values ( foF2 and hmF2) as…”
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Relationship between ionospheric F2-layer critical frequency, F10.7, and F10.7P around African EIA trough by Ikubanni, S.O., Adeniyi, J.O.

“…Improved ionospheric modeling requires a better understanding of the relationship between ionospheric parameters and their influencing solar and geomagnetic…”
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Variability of foF2 in the equatorial ionosphere by Bilitza, D., Obrou, O.K., Adeniyi, J.O., Oladipo, O.

“…We have used data from two equatorial stations in the African longitude sector to study the monthly variability of foF2. Diurnal, seasonal, and solar activity…”
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Pattern of F2-layer peak electron density across African Ionosonde locations and response to solar activity by Adebesin, B.O., Ikubanni, S.O., Adebiyi, S.J., Bakare, N.O., Okoh, D.I., Adeniyi, J.O., Adekoya, B.J.

“…•Both the pre-noon and post-noon NmF2 peaks at the equatorial locations decreases with descending order of Geographic latitude.•At 06LT of the LSA and HSA,…”
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Occurrence pattern of large-scale ionospheric irregularities over Ilorin, Nigeria - During solar cycle 24 by Oladipo, O.A., Olawepo, A.O., Adeniyi, J.O., Adimula, I.A., Willoughby, A.A., Doherty, P.H.

“…Ionospheric plasma density irregularities are regular features of the nighttime equatorial ionosphere especially around solar maximum. These irregularities…”
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Effect of geomagnetic storms on l-band scintillation over Ilorin, Nigeria by Oladipo, O.A., Olawepo, A.O., Adeniyi, J.O., Adimula, I.A., Willoughby, A.A., Doherty, P.H.

“…•Storms effects of l-band scintillation at Ilorin were investigated and reported.•Variations in Dst and Bz values were used to explain storms effect on…”
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Variation of bottomside profile parameters B0 and B1 at high solar activity for an equatorial station by Adeniyi, J.O, Radicella, S.M

“…Diurnal and seasonal variations in experimental profile parameters B0 and B1 are examined, at high solar activity, for Ouagadougou, Burkina Faso, an equatorial…”
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Ionospheric climatology at Africa EIA trough stations during descending phase of sunspot cycle 22 by Adebesin, B.O., Rabiu, A.B., Bolaji, O.S., Adeniyi, J.O., Amory-Mazaudier, C.

“…The African equatorial ionospheric climatology during the descending phase of sunspot-cycle 22 (spanning 1992–1996) was investigated using 3 ionosondes located…”
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Validating IRI-2016 for quiet-time F2-region peak electron density height (hmF2) at different latitudes during moderate solar activity by Adeniyi, J.O., Adebesin, B.O., Ikubanni, S.O., Adebiyi, S.J., Adekoya, B.J., Babatunde, J.G.

“…•IRI-2016 hmF2 was validated for stations at three different latitudes during moderate solar activity.•All the hmF2 model options (BSE, AMTB, and SHU) show…”
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Dynamics of sunspot cycle ascending and descending phases asymmetry in equatorial ionospheric variability by Ikubanni, S.O., Adeniyi, J.O., Adebesin, B.O., Adebiyi, S.J.

“…Ionospheric variation from the climatological mean has been extensively studied due to its effect on ionospheric high frequency radio propagation. This work…”
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Latitudinal effect on the diurnal variation of the F2 layer at low solar activity by Adeniyi, J.O., Joshua, B.W.

“…The latitudinal effect on the diurnal variation of the F2 layer peak parameters at low solar activity was investigated. Our results reveal that the likelihood…”
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TEC variations and IRI-2012 performance at equatorial latitudes over Africa during low solar activity by Olawepo, A.O., Adeniyi, J.O., Oluwadare, E.J.

“…•Quiet time variations in TEC at some equatorial stations.•Comparisons of the seasonal changes in TEC at the three stations.•The performance of IRI-2012 at…”
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Determination of the threshold value of F10.7 in the dependence of foF2 on solar activity by Adeniyi, J.O., Ikubanni, S.O.

“…By introducing the two-segmented linear regression model instead of the well known quadratic fit, we were able to describe the solar activity dependence of the…”
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Variation of saturation effect in the ionospheric F2 critical frequency at low latitude by Ikubanni, S.O., Adeniyi, J.O.

“…Saturation in the dependence of foF2 on solar flux is a phenomenon more pronounced in the equatorial ionization anomaly region. The phenomenon was observed in…”
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