author = "Silva, R{\'e}gia Pereira da and Souza, Jonas Rodrigues de and 
                         Sobral, Jos{\'e} Humberto Andrade and Denardin, Clezio Marcos and 
                         Borba, Gilvan Luiz and Santos, Marcos Aur{\'e}lio Ferreira dos",
          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 {Universidade Federal do Rio Grande do Norte 
                         (UFRN)} and {Instituto Nacional de Pesquisas Espaciais (INPE)}",
                title = "Ionospheric plasma bubble zonal drift derived from total electron 
                         content measurements",
              journal = "Radio Science",
                 year = "2019",
               volume = "54",
               number = "7",
                pages = "580--589",
                month = "July",
             keywords = "equatorial ionosphere, plasma bubble, GNSS, zonal drift.",
             abstract = "Equatorial plasma bubbles consist of field-aligned large-scale 
                         depletions, or irregularities, characterized by drastic ion 
                         density rarefactions of the nocturnal low latitude/equatorial 
                         ionosphere. Understanding their behavior is important because of 
                         their degrading effects on radio wave signals and, consequently, 
                         their respective technological applications such as, for example, 
                         Global Positioning System applications. In this sense, a 
                         methodology of pattern recognition was developed and implemented 
                         here using the Long-Term Ionospheric Anomaly Monitoring in order 
                         to infer the plasma bubbles zonal drift velocities, using two 
                         receiving stations of global navigation satellite systems data 
                         from the Brazilian Continuous Monitoring Network, located near to 
                         each other, in Salvador (BA) during geomagnetically quiet periods. 
                         The study covered the years of 2012, 2013, and 2014 for the months 
                         from September to January of the following year, choosing 10 
                         representative days for each month. The average results for the 
                         plasma bubble zonal velocities provided by the model calculations 
                         were in agreement with the well-known values. However, monthly 
                         individual analysis showed a behavior anticorrelated with that 
                         expected for high solar flux. Probably, the unexpected behavior is 
                         due to atypical configuration of the solar activity ascending 
                  doi = "10.1029/2018RS006727",
                  url = "http://dx.doi.org/10.1029/2018RS006727",
                 issn = "0048-6604",
             language = "en",
           targetfile = "silva_ionospheric.pdf",
        urlaccessdate = "17 abr. 2021"