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		<citationkey>SantosReseMuelFagu:2018:StAbDo</citationkey>
		<title>Study about the downward movement of sporadic E layers using a theoretical model around the equatorial ionization anomaly</title>
		<year>2018</year>
		<secondarytype>PRE CI</secondarytype>
		<author>Santos, F. C.,</author>
		<author>Resende, Laysa Cristina Araújo,</author>
		<author>Muella, M. T. A. H.,</author>
		<author>Fagundes, P. R.,</author>
		<group></group>
		<group>GES-CEA-SESPG-INPE-MCTIC-GOV-BR</group>
		<affiliation></affiliation>
		<affiliation>Instituto Nacional de Pesquisas Espaciais (INPE)</affiliation>
		<electronicmailaddress></electronicmailaddress>
		<electronicmailaddress>laysita19@hotmail.com</electronicmailaddress>
		<conferencename>Latin American Conference on Space Geophysics, 11 (COLAGE)</conferencename>
		<conferencelocation>Buenos Aires, Argentina</conferencelocation>
		<date>16-20 abr.</date>
		<transferableflag>1</transferableflag>
		<contenttype>External Contribution</contenttype>
		<abstract>Sporadic E layer (Es) refers to narrow ionization enhancements of the ionospheric plasma with thickness less than 5 km occurring in heights from 90 to 150 km. At equatorial and low latitude regions, Es layers cause a scattering of radio waves at HF frequencies. Thus, their detection and occurrence characteristics can be analyzed from ionosonde observations. The Es layers are classied in several types in relation to the formation mechanism according to the region of the globe where they are detected. At low and middle latitudes, the Es layer formation depends essentially on the vertical wind shear associated with the tidal winds. In several data for Brazilian region, it was observed the h type Es with downward movement until lower altitudes. This behavior for the low latitude is still not everything known. Therefore, in this work, we used the Ionospheric Model of the E Region (MIRE) with the purpose to identify the atmospheric physic dynamics of the Es layer movement at latitudes around the Equatorial Ionization Anomaly in the Brazilian sector. The new results about the simulations and data will allow explaining the semidiurnal and diurnal periodicity that characterizes the Es layer downward motion.</abstract>
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		<language>en</language>
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