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- W1586156761 abstract "F-region vertical velocities are derived from the ground-based ionosonde data for Ibadan (7.4°N, 3.9°E; dip 6°S:an equatorial station in the African zone), to study the general characteristics of electrodynamics of equatorialionosphere, such as their variation with season, solar cycle, and magnetic activity at different local time sectors.The results show profound seasonal and geomagnetic effects. Except for equinoctial period, there is an excellentconsistency in the magnitudes (nearly 20 m/s) and patterns of upward daytime F-region drifts at low and highsolar activity periods. Evening F-region exhibits strong motion with absolute mean value for quiet-time (15 m/s)greater than on disturbed-time (10 m/s). The average downward quiet midnight-early morning hours sector valueis well below than 10 m/s. The evening reversal time is earliest and latest during solstitial periods. Prereversalpeak is season dependent and varies strongly with magnetic activity. We show that prereversal peak, daytime,and nighttime maximum drifts saturate at particular values of F10.7 cm solar radio flux index, effects not noticedwith corresponding sunspot number. Our observations confirm several previous results from other equatorialsites utilizing different experimental techniques." @default.
- W1586156761 created "2016-06-24" @default.
- W1586156761 creator A5005276559 @default.
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- W1586156761 date "2009-12-18" @default.
- W1586156761 modified "2023-10-14" @default.
- W1586156761 title "Morphology of F-region vertical E×B drifts in the African sector using ionosonde measurements" @default.
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- W1586156761 doi "https://doi.org/10.4401/ag-3062" @default.
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