Equatorial spread-F occurrence observed at two near equatorial stations in the Brazilian sector and its occurrence modulated by planetary waves

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dc.contributor.authorBertoni F.C.P.
dc.contributor.authorSahai Y.
dc.contributor.authorRaulin J.-P.
dc.contributor.authorFagundes P.R.
dc.contributor.authorPillat V.G.
dc.contributor.authorGimenez de Castro C.G.
dc.contributor.authorLima W.L.C.
dc.date.accessioned2024-03-13T01:11:42Z
dc.date.available2024-03-13T01:11:42Z
dc.date.issued2011
dc.description.abstractIn this work, we present a study on the ionospheric Equatorial Spread-F (ESF) occurrence and morphologic features, based on measurements made during the period of October 2005 and January 2006 and May-July 2006 by digital ionosondes operating at two near magnetic equator locations, namely, Palmas (10.2°S, 48.2°W; dip lat. 5.5°S) and Manaus (3.1°S, 60.0°W; dip lat. 6.4°N), Brazil. The ionospheric height related parameter (h'. F), the ionospheric density related parameter (foF2), and the dynamo-electric fields inferred from h'. F time derivative (d. h'. F/d. t) were analyzed with wavelets transform. The results exhibit periodic nature with wave-like signatures of 12-16 days. On the other hand, the electron density time variability (d. Ne/d. t) was also analyzed using wavelets transform, and it presented planetary wave modulation with episodic nature. The ESF start time variability demonstrates to have a periodic signature of approximately 15 days with a good significance level, and it has a tendency to be anti-correlated with the pre-reversal enhancement time velocity (d. h'. F/d. t), showing that larger vertical drift velocities (ionospheric uplift) may contribute to generate earlier ESF occurrence. © 2010 Elsevier Ltd.
dc.description.firstpage457
dc.description.issuenumber4
dc.description.lastpage463
dc.description.volume73
dc.identifier.doi10.1016/j.jastp.2010.10.017
dc.identifier.issn1364-6826
dc.identifier.urihttps://dspace.mackenzie.br/handle/10899/37011
dc.relation.ispartofJournal of Atmospheric and Solar-Terrestrial Physics
dc.rightsAcesso Aberto
dc.subject.otherlanguageEquatorial ionosphere
dc.subject.otherlanguageIonosonde
dc.subject.otherlanguageIonospheric plasma irregularities
dc.subject.otherlanguagePlanetary waves
dc.titleEquatorial spread-F occurrence observed at two near equatorial stations in the Brazilian sector and its occurrence modulated by planetary waves
dc.typeArtigo
local.scopus.citations17
local.scopus.eid2-s2.0-79551491111
local.scopus.subjectDigital ionosondes
local.scopus.subjectDrift velocities
local.scopus.subjectElectron densities
local.scopus.subjectEquatorial ionosphere
local.scopus.subjectEquatorial spread F
local.scopus.subjectIonosonde
local.scopus.subjectIonospheric heights
local.scopus.subjectIonospheric plasma irregularities
local.scopus.subjectMagnetic equator
local.scopus.subjectPlanetary Waves
local.scopus.subjectTime derivative
local.scopus.subjectTime variability
local.scopus.subjectWavelets transform
local.scopus.updated2024-05-01
local.scopus.urlhttps://www.scopus.com/inward/record.uri?partnerID=HzOxMe3b&scp=79551491111&origin=inward
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