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@Article{JesusBTPBFAJFV:2020:MoFeIo,
               author = "Jesus, Rodolfo de and Batista, Inez Staciarini and Takahashi, 
                         Hisao and Paula, Eurico Rodrigues de and Barros, D. and 
                         Figueiredo, Cosme Alexandre Oliveira Barros and Abreu, A. J. de 
                         and Jonah, O. F. and Fagundes, P. R. and Venkatesh, K.",
          affiliation = "{Instituto Nacional de Pesquisas Espaciais (INPE)} and {Instituto 
                         Nacional de Pesquisas Espaciais (INPE)} and {Instituto Nacional de 
                         Pesquisas Espaciais (INPE)} and {Instituto Nacional de Pesquisas 
                         Espaciais (INPE)} and {Instituto Nacional de Pesquisas Espaciais 
                         (INPE)} and {Instituto Nacional de Pesquisas Espaciais (INPE)} and 
                         {Instituto Tecnol{\'o}gico de Aeron{\'a}utica (ITA)} and 
                         {Massachusetts Institute of Technology (MIT)} and {Universidade do 
                         Vale do Para{\'{\i}}ba (UNIVAP)} and National Atmospheric 
                         Research Laboratory, Gadanki, India",
                title = "Morphological features of ionospheric scintillations during high 
                         solar activity using GPS observations over the south american 
                         sector",
              journal = "Journal of Geophysical Research: Space Physics",
                 year = "2020",
               volume = "125",
               number = "3",
                pages = "JGRA55437",
                month = "Mar.",
             abstract = "The 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 SeptemberMarch at 2002 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 ~6001000 km, which is larger than 
                         values reported in most previous studies.",
                  doi = "10.1029/2019JA027441",
                  url = "http://dx.doi.org/10.1029/2019JA027441",
                 issn = "2169-9402",
             language = "en",
           targetfile = "jesus_morphological-compactado.pdf",
        urlaccessdate = "18 jan. 2021"
}


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