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The equatorial F-layer: progress and puzzles
Authors:H Rishbeth
Institution:(1) Department of Physics and Astronomy, University of Southampton, Southampton, SO17 1BJ, United Kingdom
Abstract:This work reviews some aspects of the ionospheric F-layer in the vicinity of the geomagnetic equator. Starting with a historical introduction, brief summaries are given of the physics that makes the equatorial ionosphere so interesting, concentrating on the large-scale structure rather than the smaller-scale instability phenomena. Several individual topics are then discussed, including eclipse effects, the asymmetries of the lsquoequatorial troughrsquo, variations with longitude, the semiannual variation, the effects of the global thermospheric circulation, and finally the equatorial neutral thermosphere, including lsquosuperrotationrsquo and possible topographic influences.
Keywords:Ionosphere (equatorial ionosphere)
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