Equatorial 150 km echoes and daytime F-region vertical plasma drifts in the Brazilian longitude sector

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dc.contributor.authorRodrigues, F. S.
dc.contributor.authorShume, E. B.
dc.contributor.authorDe Paula, E. R.
dc.contributor.authorMilla, Marco
dc.date.accessioned2018-07-23T16:12:53Z
dc.date.available2018-07-23T16:12:53Z
dc.date.issued2013-10-31
dc.description.abstractPrevious studies showed that conventional coherent backscatter radar measurements of the Doppler velocity of the so-called 150 km echoes can provide an alternative way of estimating ionospheric vertical plasma drifts during daytime hours (Kudeki and Fawcett, 1993; Chau and Woodman, 2004). Using observations made by a small, lowpower 30 MHz coherent backscatter radar located in the equatorial site of São Luís (2.59◦ S, 44.21◦ W; −2.35◦ dip lat), we were able to detect and monitor the occurrence of 150 km echoes in the Brazilian sector. Using these measurements we estimated the local time variation of daytime vertical ionospheric drifts in the eastern American sector. Here, we present a few interesting cases of 150 km-echoes observations made by the São Luís radar and estimates of the diurnal variation of vertical drifts. These cases exemplify the variability of the vertical drifts in the Brazilian sector. Using same-day 150 km-echoes measurements made at the Jicamarca Radio Observatory in Peru, we also demonstrate the variability of the equatorial vertical drifts across the American sector. In addition to first estimates of the absolute vertical plasma drifts in the eastern American (Brazilian) sector, we also present observations of abnormal drifts detected by the São Luís radar associated with the 2009 major sudden stratospheric warming event.es_ES
dc.description.peer-reviewPor pareses_ES
dc.formatapplication/pdfes_ES
dc.identifier.citationRodrigues, F. S., Shume, E. B., De Paula, E. R., & Milla, M. (2013). Equatorial 150 km echoes and daytime F-region vertical plasma drifts in the Brazilian longitude sector.==$Annales Geophysicae, 31$==(10), 1867–1876. https://doi.org/10.5194/angeo-31-1867-2013es_ES
dc.identifier.doihttps://doi.org/10.5194/angeo-31-1867-2013es_ES
dc.identifier.govdocindex-oti2018
dc.identifier.journalAnnales Geophysicaees_ES
dc.identifier.urihttp://hdl.handle.net/20.500.12816/2038
dc.language.isoenges_ES
dc.publisherEuropean Geosciences Uniones_ES
dc.relation.ispartofurn:issn:0992-7689
dc.rightsinfo:eu-repo/semantics/restrictedAccesses_ES
dc.subjectIonospherees_ES
dc.subjectElectric fields and currentses_ES
dc.subjectEquatorial ionospherees_ES
dc.subjectIonospheric irregularitieses_ES
dc.subject.ocdehttp://purl.org/pe-repo/ocde/ford#1.05.01es_ES
dc.titleEquatorial 150 km echoes and daytime F-region vertical plasma drifts in the Brazilian longitude sectores_ES
dc.typeinfo:eu-repo/semantics/articlees_ES

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