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@InProceedings{FigueiredoTaWrOtShSi:2018:DiKiNi,
               author = "Figueiredo, Cosme Alexandre Oliveira Barros and Takahashi, Carlos 
                         and Wrasse, Cristiano Max and Otsuka, Yuichi and Shikawa, Kazuo 
                         and Silva, Diego Barros",
          affiliation = "{Instituto Nacional de Pesquisas Espaciais (INPE)} and {Instituto 
                         Nacional de Pesquisas Espaciais (INPE)} and {Instituto Nacional de 
                         Pesquisas Espaciais (INPE)} and {Nagoya University} and {Nagoya 
                         University} and {Instituto Nacional de Pesquisas Espaciais 
                         (INPE)}",
                title = "Different kind of nighttime traveling ionospheric disturbances 
                         observed by airglow images over southsoutheast of brazi",
                 year = "2018",
         organization = "Cospar Scientific Assembly, 42.",
             abstract = "Different type of MSTIDs has been observed at Cachoeira Paulista 
                         (22.4S; 45.0W), Brazil, from June 2013 to December 2015 using 
                         airglow OI 630.0 nm images. During the period, 58 MSTIDs were 
                         identified and classified as: MSTIDs dark band (around 10 events), 
                         and periodic MSTIDs (48 events). Dark band MSTIDs present phase 
                         velocity between 50 and 200 m/s and propagation direction to 
                         northwestward. On the other hand, periodic MSTIDs have a 
                         horizontal wavelength of 80 to 160 km, a period ranging between 5 
                         and 45 minutes, the phase velocity of 50 to 200 m/s, and 
                         propagation directions are mainly north-northeastward. The waves 
                         parameters indicate that the periodic MSTIDs have different 
                         characteristics compared to the dark band MSTIDs, suggesting that 
                         the periodic MSTIDs are not generated through the well-known 
                         Perkins instability. In addition to it, the present study 
                         indicates that the spectral characteristics found in Brazil are 
                         different from other regions such as Japan and Indonesia. 
                         Therefore, we intend to investigate the generation mechanisms of 
                         the periodic MSTIDs. Furthermore, the anisotropy observed in the 
                         periodic MSTID propagation direction can be explained by the wind 
                         filtering mechanism.",
  conference-location = "Pasadena, California",
      conference-year = "14-22 July",
             language = "en",
        urlaccessdate = "25 nov. 2020"
}


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