@InProceedings{SouzaAbduBati:2006:NeVe,
               author = "Souza, Jonas Rodrigues de and Abdu, Mangalathayil Ali and Batista, 
                         Inez Starciarini",
          affiliation = "Instituto Nacional de Pesquisas Especiais, Divis{\~a}o de 
                         Aeronomia (INPE.DAE) and Instituto Nacional de Pesquisas 
                         Especiais, Divis{\~a}o de Aeronomia (INPE.DAE) and Instituto 
                         Nacional de Pesquisas Especiais, Divis{\~a}o de Aeronomia 
                         (INPE.DAE)",
                title = "Equatorial spread F statistic model for Brazilian longitude 
                         sector: new version",
            booktitle = "Proceedings...",
                 year = "2006",
         organization = "Committe on Space Research, 36. (COSPAR).",
             abstract = "We have published a regional empirical model for the quiet-time 
                         spread F percentage occurrence in the Brazilian sector. The model 
                         includes dependence with solar activity, season and latitude as 
                         required by IRI. A database with 13 years of spread F percentage 
                         occurrence registered simultaneously over an equatorial station 
                         Fortaleza and a low latitude station Cachoeira Paulista and the 
                         Cubic-B spline technique to fit the data in local time, latitude, 
                         season and solar flux variation were used to construct the model. 
                         Due to Cubic-B spline limitation the data were first grouped into 
                         solar flux bins of F10.7 100, 100< F10.7 < 180, and F10.7 180 for 
                         each of the 12 months to be fitted. We present here a new version 
                         of the spread F occurrence distribution, in which Bernstein 
                         polynomials, as base functions, are used to improve the solar flux 
                         dependence and extend the latitudinal coverage of our model.",
  conference-location = "Beijing, China",
      conference-year = "2006-07-16",
             language = "en",
        urlaccessdate = "28 jun. 2024"
}