@InProceedings{EssienTaFiWrBaGo:2019:StMeTr,
               author = "Essien, Patrick and Takahashi, Hisao and Figueiredo, Cosme 
                         Alexandre Oliveira Barros and Wrasse, Cristiano Max and Barros, 
                         Diego and Gobbi, Delano",
          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 {Instituto Nacional de Pesquisas Espaciais 
                         (INPE)} and {Instituto Nacional de Pesquisas Espaciais (INPE)}",
                title = "Study on Medium-Scale Traveling Ionospheric Disturbances Observed 
                         in the South American Equatorial Region",
                 year = "2019",
         organization = "AGU Fall Meeting",
             abstract = "This work presents Medium-Scale Traveling Ionospheric Disturbances 
                         (MSTIDs) over the South American equatorial and low latitude 
                         regions (latitude 0 - 15o south and longitude 30o - 55o west) 
                         during the maximum to minimum phase of solar cycle 24. Using data 
                         collected by GNSS (GPS and GLONASS) dual frequency receivers 
                         network, detrending total electron content (TEC) maps were 
                         constructed to find out the presence of MSTIDs, and keograms were 
                         used to characterize MSTIDs. The horizontal wavelengths of the 
                         MSTIDs were mostly concentrated between 500 and 800 km, with mean 
                         values of 654 ± 110 km while the observed periods were distributed 
                         around 30 - 40 min with the mean of 35 ± 5 min, and the horizontal 
                         phase speeds extended from 200 - 400 m/s, with mean of 290 ± 110 
                         m/s. Most of the MSTIDs were observed during the daytime in winter 
                         solstice (June-August) and tend to propagate northeastward and 
                         northwestward. Atmospheric gravity waves could be the prime 
                         precursor of the MSTIDs that propagated in the same direction. 
                         However, during summer solstice the MSTIDs propagated in all 
                         directions. It is noted that a few oscillations of MSTIDs 
                         propagated to southeast along the year, which could be associated 
                         with Intertropical Convergence Zone (ITCZ).",
  conference-location = "San Francisco, CA",
      conference-year = "09-13 dec.",
             language = "en",
           targetfile = "essien_study.pdf",
        urlaccessdate = "16 abr. 2024"
}