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		<label>lattes: 4540882358553916 1 AmorimPimeAlme:2012:CHMETR</label>
		<citationkey>AmorimPimeAlme:2012:ChMeTr</citationkey>
		<title>Characterization of medium-scale traveling ionospheric disturbances in the brazilian low latitude sector   statistical analysis of all-sky images of oi 630 nm airglow emission</title>
		<year>2012</year>
		<secondarytype>PRE PN</secondarytype>
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		<author>Amorim, Danielle Cristina de Morais,</author>
		<author>Pimenta, Alexandre Alvares,</author>
		<author>Almeida, A. A.,</author>
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		<group>DAE-CEA-INPE-MCTI-GOV-BR</group>
		<affiliation></affiliation>
		<affiliation>Instituto Nacional de Pesquisas Espaciais (INPE)</affiliation>
		<electronicmailaddress>danielle@laser.inpe.br</electronicmailaddress>
		<e-mailaddress>danielle@laser.inpe.br</e-mailaddress>
		<journal>Revista Brasileira de Geofísica</journal>
		<volume>30</volume>
		<number>2</number>
		<pages>129-136</pages>
		<secondarymark>C_ASTRONOMIA_/_FÍSICA B4_CIÊNCIAS_AGRÁRIAS_I B4_CIÊNCIAS_BIOLÓGICAS_I B3_ECOLOGIA_E_MEIO_AMBIENTE B3_ENGENHARIAS_I B2_ENGENHARIAS_III B2_GEOCIÊNCIAS B2_GEOGRAFIA B1_INTERDISCIPLINAR B2_MATEMÁTICA_/_PROBABILIDADE_E_ESTATÍSTICA</secondarymark>
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		<keywords>MSTIDs, airglow, Perkins instability.</keywords>
		<abstract>In order to characterize the phenomenon known as Medium-Scale Traveling Ionospheric Disturbances (MSTIDs), we present in this paper the results obtained from the statistical analysis of 10.5 years all-sky images of OI 630 nm airglow emission over the Brazilian low latitude sector. The images, which were obtained by an all-sky imager installed at Cachoeira Paulista (22.7&#9702;S, 45&#9702;W), show dark band structures propagating from southeast to northwest with velocities of 50-200 m/s. Our results show the greatest occurrence of MSTIDs during solar minimum and a minor occurrence rate during descending and ascending solar activity periods. During solar maximum activity we have not detected MSTIDs signatures on all-sky images. In relation to seasonality, the greatest frequency of occurrence is during local winter. All detected events have occurred during geomagnetically quiet conditions (Kp<3). Possible mechanisms of generation of this phenomenon are discussed.</abstract>
		<area>CEA</area>
		<language>en</language>
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		<citingitemlist>sid.inpe.br/bibdigital/2013/09.29.20.43 1</citingitemlist>
		<url>http://sys2.sbgf.org.br/revista/index.php/rbgf/article/view/86/41</url>
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