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1. Identificação
Tipo de ReferênciaArtigo em Evento (Conference Proceedings)
Sitemtc-m21c.sid.inpe.br
Código do Detentorisadg {BR SPINPE} ibi 8JMKD3MGPCW/3DT298S
Identificador8JMKD3MGP3W34R/3SETMH2
Repositóriosid.inpe.br/mtc-m21c/2018/12.27.12.18
Repositório de Metadadossid.inpe.br/mtc-m21c/2018/12.27.12.18.47
Última Atualização dos Metadados2021:02.27.05.01.12 (UTC) administrator
Chave SecundáriaINPE--PRE/
Chave de CitaçãoPimenta:2018:StMaAb
TítuloStudy of magnetohydrodynamic absorption of medium-scale traveling ionospheric disturbances (MSTID'S) under different solar activity conditions
Ano2018
Data de Acesso02 maio 2024
Tipo SecundárioPRE CN
2. Contextualização
AutorPimenta, Alexandre Alvares
Identificador de Curriculo8JMKD3MGP5W/3C9JGGL
GrupoDIDAE-CGCEA-INPE-MCTIC-GOV-BR
AfiliaçãoInstituto Nacional de Pesquisas Espaciais (INPE)
Endereço de e-Mail do Autoralexandre.pimenta@inpe.br
Nome do EventoSimpósio Brasileiro de Geofísica Espacial e Aeronomia, 7 (SBGEA)
Localização do EventoSanta Maria, RS
Data05-09 nov
Histórico (UTC)2018-12-27 12:18:47 :: simone -> administrator ::
2021-02-27 05:01:12 :: administrator -> simone :: 2018
3. Conteúdo e estrutura
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Tipo de Versãopublisher
ResumoAbsorption of MSTID's in the F-layer is analyzed using the theory of magnetohydrodynamic and ground based optical and radio techniques observations. Depending of solar activity, these disturbances move horizontally at speeds of approximately 50-250 m/s over distances of several thousands of kilometers. It is natural to relate these movements with the propagation of a definite type of wave in the ionosphere. Internal gravity waves can be regarded as waves of this type. If we consider a gravity waves to be primarily a neutral wave phenomenon then its interaction with the ionization in the F-region via ionneutral collisions can be discussed by the magnetohydrodynamic theory. Using ground-based all-sky imaging systems, measurements of moving MSTID's in the OI 630, 0 nm nightglow emission were detected in the tropical region. Also, digisonde observations, available in the South Hemisphere, registered abrupt increases in both the Flayer peak (HmF2) and minimum virtual height (h'F) when the MSTID's passed over the zenity of instruments. Estimates of the spatial damping decrements for MSTID's show that the increase in electron concentration in the F-region is the main parameter for the MSTID's absorption. From this point of view we can understand the fact that most moving disturbances covering distances of several thousand of kilometers during low solar activity. In this work, we present and discuss the effect of ionization in the propagation of MSTID's.
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5. Fontes relacionadas
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6. Notas
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