Physics
Scientific paper
May 2008
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2008jastp..70.1056o&link_type=abstract
Journal of Atmospheric and Solar-Terrestrial Physics, vol. 70, issue 7, pp. 1056-1065
Physics
1
Equatorial Ionosphere, Electron Density Profiles, Variability, Variability Indices
Scientific paper
A study on variability of the equatorial ionosphere was carried out at fixed heights below the F2 peak for two different levels of solar activity. The study covered height range of 100 km up to the peak of F2 layer using a real height step increase of 10 km. The variability index used is the percentage ratio of standard deviation over the average value for the month. Daytime minimum variability of between 3% and 10% was observed at height range of about 150-210 km during low solar activity and between 2% and 7% at height range of 160-220 km during high solar activity. The nighttime maximum of between 70% and 187% was observed at height range of about 210-250 km during low solar activity and between 42% and 127% at height range of 210-250 km during high solar activity. The height range at which daytime minimum was observed falls within the F1 height of the ionosphere. The result obtained is consistent with previous works carried out in the low latitude locations for American sector.
Adeniyi J. O.
Obrou O. K.
Oladipo O. A.
Radicella Sandro M.
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