author = "Muella, Marcio T. A. H. and Duarte-Silva, Marcelo H. and Moraes, 
                         Alison O. and Paula, Eurico Rodrigues de and Rezende, Luiz Felipe 
                         Campos de and Alfonsi, Lucilla and Affonso, Bruno J.",
          affiliation = "{Universidade do Vale do Para{\'{\i}}ba (UNIVAP)} and 
                         {Universidade do Vale do Para{\'{\i}}ba (UNIVAP)} and {Instituto 
                         de Aeron{\'a}utica e Espa{\c{c}}o (IAE)} and {Instituto Nacional 
                         de Pesquisas Espaciais (INPE)} and {Instituto Nacional de 
                         Pesquisas Espaciais (INPE)} and {Istituto Nazionale di Geofisica e 
                         Vulcanologia (INGV)} and {Empresa Brasileira de Aeron{\'a}utica 
                         S.A (EMBRAER)}",
                title = "Climatology and modeling of ionospheric scintillations and 
                         irregularity zonal drifts at the equatorial anomaly crest region",
              journal = "Annales Geophysicae",
                 year = "2017",
               volume = "35",
                pages = "1201--12018",
             keywords = "Electromagnetics (scattering and diffraction) ionosphere 
                         (ionospheric irregularities, modeling and forecasting.",
             abstract = "In this study the climatology of ionospheric scintillations and 
                         the zonal drift velocities of scintillationproducing 
                         irregularities are depicted for a station located under the 
                         southern crest of the equatorial ionization anomaly. Then, the 
                         \α\− ionospheric fading model is used for the 
                         firstand second-order statistical characterization of amplitude 
                         scintillations. In the statistical analyzes, data are used from 
                         single-frequency GPS receivers acquired during \∼ 17 years 
                         (September 1997November 2014) at Cachoeira Paulista (22.4\◦ 
                         S; 45.0\◦ W), Brazil. The results reveal that the nocturnal 
                         occurrence of scintillations follows the seasonal distribution of 
                         plasma bubble irregularities observed in the longitudinal sector 
                         of eastern South America. In addition to the solar cycle 
                         dependence, the results suggest that the occurrence climatology of 
                         scintillations is also modulated by the secular variation in the 
                         dip latitude of Cachoeira Paulista, since the maximum occurrence 
                         of scintillations during the peak of solar cycle 24 was \∼ 
                         20 % lower than that observed during the maximum of solar cycle 
                         23. The dynamics of the irregularities throughout a solar cycle, 
                         as investigated from the estimates of the mean zonal drift 
                         velocities, presented a good correlation with the EUV and F10.7 cm 
                         solar fluxes. Meanwhile, the seasonal behavior showed that the 
                         magnitude of the zonal drift velocities is larger during the 
                         December solstice months than during the equinoxes. In terms of 
                         modeling, the results for the \α \−  distribution 
                         fit quite well with the experimental data and with the temporal 
                         characteristics of fading events independently of the solar 
                         activity level.",
                  doi = "10.5194/angeo-35-1201-2017",
                  url = "http://dx.doi.org/10.5194/angeo-35-1201-2017",
                 issn = "0992-7689",
             language = "en",
           targetfile = "muella_climatology.pdf",
        urlaccessdate = "04 dez. 2020"