Please use this identifier to cite or link to this item: http://hdl.handle.net/2122/7933
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dc.contributor.authorallFagundes, P. R.en
dc.contributor.authorallBittencourt, J. A.en
dc.contributor.authorallAbreu, A. J.en
dc.contributor.authorallMoor, L. P.en
dc.contributor.authorallMuella, M. T. A. H.en
dc.contributor.authorallSahai, Y.en
dc.contributor.authorallAbalde, J. R.en
dc.contributor.authorallPezzopane, M.; Istituto Nazionale di Geofisica e Vulcanologia, Sezione Roma2, Roma, Italiaen
dc.contributor.authorallSobral, J. H. A.en
dc.contributor.authorallAbdu, M. A.en
dc.contributor.authorallPimenta, A. A.en
dc.contributor.authorallAmorim, D. C. M.en
dc.date.accessioned2012-04-13T07:41:05Zen
dc.date.available2012-04-13T07:41:05Zen
dc.date.issued2012-04-07en
dc.identifier.urihttp://hdl.handle.net/2122/7933en
dc.description.abstractAn atypical nighttime spread-F structure is observed on ionograms at or above the F2 trace, near the crest of the ionospheric equatorial ionization anomaly (EIA) region. This ionospheric atypical spread-F phenomenon was observed using two closed spaced( 115 km) ionospheric soundings stations located in Sao Jose dos Campos (23.21 S, 45.97 W) and Cachoeira Paulista (22.70 S, 45.01 W), Brazil, in a low-latitude station (near the southern crest of the EIA region), during nighttime, low solar activity, and quiet geomagnetic conditions. This structure, in the initial phase, appears in the ionogram as a faint spread-F trace above or at the F2-layer peak height. After a few minutes, it develops into a strong spread-F trace, and afterwards, it moves to altitudes below the F2-layer peak heights. Finally, the atypical nighttime F-layer trace structure may remain for a while between the F-layer bottom side and peak height or can move to an altitude above the F-layer peak height, and then it disappears. In order to have a comprehensive view of the ionospheric environment characterizing the phenomenon under study, complementary data from six GPS station were used to investigate the ionosphere environment conditions, during both events. The six GPS stations used in this study are distributed from near the equatorial region to low latitudes and provide evidence that the atypical nighttime spread-F structures are not related with large scale equatorial irregularities (plasma bubbles).en
dc.language.isoEnglishen
dc.relation.ispartofJournal of geophysical researchen
dc.relation.ispartofseries/117(2012)en
dc.subjectspread Fen
dc.subjectequatorial ionization anomalyen
dc.subjecttraveling ionospheric disturbanceen
dc.titleAtypical nighttime spread-F structure observed near the southern crest of the ionospheric equatorial ionization anomalyen
dc.typearticleen
dc.description.statusPublisheden
dc.type.QualityControlPeer-revieweden
dc.description.pagenumberA04308en
dc.subject.INGV01. Atmosphere::01.02. Ionosphere::01.02.99. General or miscellaneousen
dc.subject.INGV01. Atmosphere::01.02. Ionosphere::01.02.02. Dynamicsen
dc.subject.INGV01. Atmosphere::01.02. Ionosphere::01.02.05. Wave propagationen
dc.subject.INGV01. Atmosphere::01.02. Ionosphere::01.02.06. Instruments and techniquesen
dc.identifier.doi10.1029/2011JA017118en
dc.description.obiettivoSpecifico1.7. Osservazioni di alta e media atmosferaen
dc.description.obiettivoSpecifico3.9. Fisica della magnetosfera, ionosfera e meteorologia spazialeen
dc.description.journalTypeJCR Journalen
dc.description.fulltextopenen
dc.contributor.authorFagundes, P. R.en
dc.contributor.authorBittencourt, J. A.en
dc.contributor.authorAbreu, A. J.en
dc.contributor.authorMoor, L. P.en
dc.contributor.authorMuella, M. T. A. H.en
dc.contributor.authorSahai, Y.en
dc.contributor.authorAbalde, J. R.en
dc.contributor.authorPezzopane, M.en
dc.contributor.authorSobral, J. H. A.en
dc.contributor.authorAbdu, M. A.en
dc.contributor.authorPimenta, A. A.en
dc.contributor.authorAmorim, D. C. M.en
dc.contributor.departmentIstituto Nazionale di Geofisica e Vulcanologia, Sezione Roma2, Roma, Italiaen
item.grantfulltextopen-
item.fulltextWith Fulltext-
item.openairecristypehttp://purl.org/coar/resource_type/c_18cf-
item.openairetypearticle-
item.languageiso639-1en-
item.cerifentitytypePublications-
crisitem.author.deptIstituto Nazionale di Geofisica e Vulcanologia (INGV), Sezione Roma2, Roma, Italia-
crisitem.author.deptIstituto Nazionale di Geofisica e Vulcanologia (INGV), Sezione Roma2, Roma, Italia-
crisitem.author.deptUniversidade do Vale do ParaĆ­ba, Brasil-
crisitem.author.deptIstituto Nazionale di Geofisica e Vulcanologia (INGV), Sezione Roma2, Roma, Italia-
crisitem.author.deptIstituto Nazionale di Geofisica e Vulcanologia (INGV), Sezione Roma2, Roma, Italia-
crisitem.author.deptIstituto Nazionale di Geofisica e Vulcanologia (INGV), Sezione Roma2, Roma, Italia-
crisitem.author.deptIstituto Nazionale di Geofisica e Vulcanologia (INGV), Sezione Roma2, Roma, Italia-
crisitem.author.orcid0000-0003-3408-6861-
crisitem.author.orcid0000-0001-5800-2322-
crisitem.author.parentorgIstituto Nazionale di Geofisica e Vulcanologia-
crisitem.author.parentorgIstituto Nazionale di Geofisica e Vulcanologia-
crisitem.author.parentorgIstituto Nazionale di Geofisica e Vulcanologia-
crisitem.author.parentorgIstituto Nazionale di Geofisica e Vulcanologia-
crisitem.author.parentorgIstituto Nazionale di Geofisica e Vulcanologia-
crisitem.author.parentorgIstituto Nazionale di Geofisica e Vulcanologia-
crisitem.classification.parent01. Atmosphere-
crisitem.classification.parent01. Atmosphere-
crisitem.classification.parent01. Atmosphere-
crisitem.classification.parent01. Atmosphere-
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