author = "Sousasantos, Jonas and Moraes, Alison de Oliveira and Sobral, 
                         Jos{\'e} Humberto Andrade and Muella, Marcio T. A. H. and Paula, 
                         Eurico Rodrigues de and Paolini, Rafael S.",
          affiliation = "{Instituto Nacional de Pesquisas Espaciais (INPE)} and {Instituto 
                         de Aeron{\'a}utica e Espa{\c{c}}o (IAE)} and {Instituto Nacional 
                         de Pesquisas Espaciais (INPE)} and {Universidade do Vale do 
                         Para{\'{\i}}ba (UNIVAP)} and {Instituto Nacional de Pesquisas 
                         Espaciais (INPE)} and EMBRAER",
                title = "Climatology of the scintillation onset over southern Brazil",
              journal = "Annales Geophysicae",
                 year = "2018",
               volume = "36",
               number = "2",
                pages = "565--576",
                month = "Apr.",
             keywords = "Ionosphere, ionospheric irregularities, modeling and forecasting, 
                         radio science, space and satellite communication.",
             abstract = "This work presents an analysis of the climatology of the onset 
                         time of ionospheric scintillations at low latitude over the 
                         southern Brazilian territory near the peak of the equatorial 
                         ionization anomaly (EIA). Data from L1 frequency GPS receiver 
                         located in Cachoeira Paulista (22.4 degrees S, 45.0 degrees W; dip 
                         latitude 16.9 degrees S), from September 1998 to November 2014, 
                         covering a period between solar cycles 23 and 24, were used in the 
                         present analysis of the scintillation onset time. The results show 
                         that the start time of the ionospheric scintillation follows a 
                         pattern, starting about 40 min earlier, in the months of November 
                         and December, when compared to January and February. The analyses 
                         presented here show that such temporal behavior seems to be 
                         associated with the ionospheric prereversal vertical drift (PRVD) 
                         magnitude and time. The influence of solar activity in the 
                         percentage of GPS links affected is also addressed together with 
                         the respective ionospheric prereversal vertical drift behavior. 
                         Based on this climatological study a set of empirical equations is 
                         proposed to be used for a GNSS alert about the scintillation 
                         prediction. The identification of this kind of pattern may support 
                         GNSS applications for aviation and oil extraction maritime 
                         stations positioning.",
                  doi = "10.5194/angeo-36-565-2018",
                  url = "http://dx.doi.org/10.5194/angeo-36-565-2018",
                 issn = "0992-7689",
             language = "en",
           targetfile = "sousasantos_climatology.pdf",
        urlaccessdate = "02 dez. 2020"