Morphological Features of Ionospheric Scintillations During High Solar Activity Using GPS Observations Over the South American Sector

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dc.contributor.authorJesus, Rodolfo de
dc.contributor.authorBatista, Inez Staciarini
dc.contributor.authorTakahashi, Hisao
dc.contributor.authorBarros, Diego
dc.contributor.authorFigueiredo, Cosme Alexandre Oliveira Barros
dc.contributor.authorAbreu, Alessandro José de
dc.contributor.authorJonah, Olusegun Folarin
dc.contributor.authorFagundes, Paulo Roberto
dc.contributor.authorVenkatesh, Karnam
dc.date.accessioned2025-05-27T14:51:37Z
dc.date.available2025-05-27T14:51:37Z
dc.date.issued22020
dc.description.abstractThe main objective of this study is to investigate the ionospheric irregularities observed by Global Positioning System‐total electron content (GPS‐TEC) receivers during the high solar activity years of 2013 and 2014 at different stations in the equatorial and low‐latitude regions in the South American sector. The ionospheric parameters used in this investigation are the TEC, the rate of change of the TEC index (ROTI), and the amplitude scintillation index (S4). In the South American sector, the ROTI and S4 indices showed that the ionospheric irregularities have an annual variation with maximum occurrence from September to April, between 20:00 LT and 02:00 LT, and no occurrence from May to August. Also, strong phase fluctuations (ROTI >1) are observed over South America at 19 LT in October and November. Morlet wavelet analysis of ROTI and S4 showed that planetary wave‐scale periods ranging from 2 to 8 days are predominant during September–March at 20–02 LT in South America. In addition, using a keogram it was possible to evaluate the distance between adjacent ionospheric plasma depletions, and this result is presented and discussed. The longitudinal distances between adjacent bubbles vary around ~600–1000 km, which is larger than values reported in most previous studies.
dc.description.physical20 p.
dc.description.sponsorshipCoordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)
dc.description.sponsorshipConselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq)
dc.description.sponsorshipFundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)
dc.description.uriCNPq (405555/2018‐0 and 302920/2014‐ 5) FAPESP (2017/50115‐0)
dc.format.mimetypePDF
dc.identifier.affiliationUniversidade do Vale do Paraíba
dc.identifier.affiliationInstituto Nacional de Pesquisas Espaciais
dc.identifier.affiliationInstituto Tecnológico de Aeronáutica
dc.identifier.affiliationMassachusetts Institute of Technology
dc.identifier.affiliationNational Atmospheric Research Laboratory
dc.identifier.bibliographicCitationJESUS, R. et al. Morphological Features of Ionospheric Scintillations During High Solar Activity Using GPS Observations Over the South American Sector. Journal of Geophysical Research: Space Physics, v. 125, n. 3, p. 1-20, 2020. Disponível em:
dc.identifier.doi10.1029/2019JA027441
dc.identifier.urihttps://repositorio.univap.br/handle/123456789/970
dc.language.isoen_US
dc.publisherAdvancing Earth and Space Sciences
dc.rights.holderJournal of Geophysical Research: Space Physics
dc.subject.keywordIonospheric irregularities
dc.subject.keywordPlanetary waves
dc.subject.keywordSolar activity
dc.titleMorphological Features of Ionospheric Scintillations During High Solar Activity Using GPS Observations Over the South American Sector
dc.typeArtigos de Periódicos

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