Effect of vertical plasma transport on ionospheric F2-region parameters at equatorial latitude

An empirical relation of daytime equatorial total electron content with equatorial electrojet in the Indian zone

“…The obtained anomaly component is also shown. The manifestations of the Noon bite out are generally less prominent in the total VTEC during equinoctial months (Oyekola and Ojo, 2008) or for days when the EEJ are less conspicuous (Rastogi et al, 1972). The same features are observed in the measured total VTEC variations.…”

“…Oyekola and Ojo (2008) have shown using the data of the African sector of the equatorial ionosphere that the NmF2 raises up to around 9.00 h Local Time (LT) and then subsides deep into bite out condition. Similar deduction can also be attained from the observation plots of Rama Rao et al (2006) which shows that over Trivandrum in all seasons, TEC rises steeply up to LT 10.00 h and subsequently rises very slowly towards the peak.…”

“…They also reported the role of altitudinal variation in vertical drift velocity in the development of plasma fountain and distribution of electron density. Recently, Oyekola and Ojo (2008) have shown relationship of the ionospheric parameters with vertical drift velocities using the data obtained in Nigeria. Their result corroborates with the observations made by Rama Rao et al (2006) on the temporal and spatial variations in TEC during low solar activity period in Indian sector.…”

On conformity of the EEJ based ionospheric model to the fountain effect and resulting improvements

“…Moreover, following, Oyekola and Ojo (2008), the drift velocity v may be taken as constant. This gives…”

“…The vertical movement is already defined by Mitra (1946) and Martyn (1947) as the one causing the fountain effect. A very useful collection of the previous works done in modeling of plasma transport is given in Oyekola and Ojo (2008). This EEF also drives the EEJ in the E region.…”