Physics
Scientific paper
Oct 2007
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2007georl..3419101l&link_type=abstract
Geophysical Research Letters, Volume 34, Issue 19, CiteID L19101
Physics
20
Ionosphere: Equatorial Ionosphere, Ionosphere: Active Experiments, Ionosphere: Ionospheric Dynamics
Scientific paper
The equatorial ionization anomaly (EIA) structures and evolutions are imaged using radio occultation observation of the newly launched FORMOSAT-3/COSMIC (F3/C) satellite constellation. Three-dimensional ionospheric images provide unprecedented detail of the EIA structure globally. This paper presents images of the EIA structures during July-August 2006 and discusses the development and subsidence of the EIA. Clear seasonal asymmetries in both ionospheric electron density and layer height are observed. Two-dimensional (cross section) maps at a meridian provide dynamic variations and motions of the northern and southern EIA crests. Results suggest that in addition to the asymmetric neutral composition effect, interactions between the summer-to-winter (transequatorial) neutral winds and strength of the equatorial plasma fountain effect play important roles in producing asymmetric development of the EIA crests as imaged by the F3/C.
Chang Po-Yao
Chen Christine H.
Fang Tzu-Wei
Hsiao Chiuder
Lin Cheng-Horng
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