@InProceedings{SouzaPaAbMoMoVa:2021:ReUp,
               author = "Souza, Jonas Rodrigues de and Paula, Eurico Rodrigues de and Abdu, 
                         Mangalathayil Ali and Moraes, A. O. and Monico, J. F. G. and Vani, 
                         B. C.",
          affiliation = "{Instituto Nacional de Pesquisas Espaciais (INPE)} and {Instituto 
                         Nacional de Pesquisas Espaciais (INPE)} and {Instituto Nacional de 
                         Pesquisas Espaciais (INPE)} and {Instituto de Aeron{\'a}utica e 
                         Espa{\c{c}}o (IAE)} and {Universidade Estadual Paulista (UNESP)} 
                         and Instituto Federal de Educa{\c{c}}{\~a}o, Ci{\^e}ncia e 
                         Tecnologia de S{\~a}o Paulo (IFSP)",
                title = "Climatology of ionospheric scintillation over Brazil: recent 
                         update",
                 year = "2021",
         organization = "Simp{\'o}sio Brasileiro de Geof{\'{\i}}sica Espacial e 
                         Aeronomia, 8. (SBGEA)",
             abstract = "The amplitude scintillation indices S4 from 1997 up to 2017 for 
                         different sites over the Brazilian territory are used to study and 
                         model the intensity of the ionospheric irregularities using spline 
                         cubic, least square and Fourier as data fitting techniques. The 
                         one minute average S4 data, measured by 3 arrays of GNSS receivers 
                         were classified according to different solar activities, seasons, 
                         Kp levels, local time and spatial dependency. Our analyze is for 
                         geomagnetically quiet conditions and the results confirm the main 
                         irregularity characteristics such as maximum (minimum) S4 values 
                         during December solstice (June solstice) inside the equatorial 
                         ionization anomaly crest (trough). The dependency of S4 index with 
                         the solar activity shows a linear increase from low to moderate 
                         solar flux levels and a saturation tendency for higher levels. The 
                         model was validated for different geophysical conditions 
                         presenting good performance.",
  conference-location = "Online",
      conference-year = "22-26 mar.",
             language = "en",
        urlaccessdate = "17 maio 2024"
}