@InProceedings{PaulinoAndWraMed:2021:ObMeFr,
               author = "Ogobor and Paulino, I. and Andrioli, V{\^a}nia de F{\'a}tima and 
                         Wrasse, Cristiano Max and Medeiros, Amauri Fragoso de",
          affiliation = "{National Space Research \& Development Agency} and {Universidade 
                         Federal de Campina Grande (UFCG)} and {Instituto Nacional de 
                         Pesquisas Espaciais (INPE)} and {Instituto Nacional de Pesquisas 
                         Espaciais (INPE)} and {National Space Research \& Development 
                         Agency}",
                title = "Observation of mesospheric fronts over Cachoeira Paulista",
                 year = "2021",
         organization = "Simp{\'o}sio Brasileiro de Geof{\'{\i}}sica Espacial e 
                         Aeronomia, 8. (SBGEA)",
             abstract = "Six mesospheric fronts were studied between 2007 and 2008 using 
                         simultaneous data from an all-sky imager (images), meteor radar 
                         (wind) and Na Lidar (temperature). The wave events were observed 
                         in the following nights: 14-15 September 2007; 5 October 2007; 5 
                         March 2008; 31 March 2008; 3 September 2008; 10 October 2007, over 
                         Cachoeira Paulista (23oS, 45oW). Images of OH, O2 (0,1) and OI 
                         557.7 nm airglow emissions were used to identify the waves. The 
                         horizontal wind and temperature data were used to correctly 
                         describe the atmospheric background conditions in the mesosphere 
                         and lower thermosphere regions. The waves were classified as 
                         mesospheric bore front (four events), and mesospheric wall front 
                         (one event). This is the first simultaneous observation of a 
                         mesospheric front in Brazil using the allsky imager, meteor radar, 
                         and Na lidar instrument. The analysis using the square of vertical 
                         wave-number profile revealed the duct regions and their primary 
                         cause (Doppler or Thermal). The bore fronts observed were undular 
                         and non-undular with dark fronts in some airglow emission layers 
                         and bright fronts in others. Most of the observed wave fronts were 
                         in agreement with the complementary effect predicted in the 
                         literature.",
  conference-location = "Online",
      conference-year = "22-26 mar.",
             language = "en",
        urlaccessdate = "09 maio 2024"
}