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@Article{PaulinoMMWBMPTMMC:2018:InPaPe,
               author = "Paulino, Igo and Moraes, Joyrles F. and Maranh{\~a}o, Gleuson L. 
                         and Wrasse, Cristiano Max and Buriti, Ricardo Arlen and Medeiros, 
                         Amauri F. and Paulino, Ana Roberta and Takahashi, Hisao and 
                         Makela, Jonathan J. and Meriwether, John W. and Campos, Jos{\'e} 
                         Andr{\'e} V.",
          affiliation = "{Universidade Federal de Campina Grande (UFCG)} and {Universidade 
                         Federal de Campina Grande (UFCG)} and {Universidade Federal de 
                         Campina Grande (UFCG)} and {Instituto Nacional de Pesquisas 
                         Espaciais (INPE)} and {Universidade Federal de Campina Grande 
                         (UFCG)} and {Universidade Federal de Campina Grande (UFCG)} and 
                         {Universidade Federal de Campina Grande (UFCG)} and {Instituto 
                         Nacional de Pesquisas Espaciais (INPE)} and {University of 
                         Illinois} and {Clemson University} and {Universidade Federal de 
                         Campina Grande (UFCG)}",
                title = "Intrinsic parameters of periodic waves observed in the OI6300 
                         airglow layer over the Brazilian equatorial region",
              journal = "Annales Geophysicae",
                 year = "2018",
               volume = "36",
               number = "1",
                pages = "265--273",
                month = "Feb.",
             keywords = "Meteorology and atmospheric dynamics (waves and tides).",
             abstract = "Periodic waves were observed in the OI6300 airglow images over Sao 
                         Joao do Cariri (36.5 degrees W, 7.4 degrees S) from 2012 to 2014 
                         with simultaneous observations of the thermospheric wind using two 
                         Fabry-Perot interferometers (FPIs). The FPIs measurements were 
                         carried out at Sao Joao do Cariri and Cajazeiras (38.5 degrees W, 
                         6.9 degrees S). The observed spectral characteristics of these 
                         waves (period and wavelength) as well the propagation direction 
                         were estimated using two-dimensional Fourier analysis in the 
                         airglow images. The horizontal thermospheric wind was calculated 
                         from the Doppler shift of the OI6300 data extracted from 
                         interference fringes registered by the FPIs. Combining these two 
                         techniques, the intrinsic parameters of the periodic waves were 
                         estimated and analyzed. The spectral parameters of the periodic 
                         waves were quite similar to the previous observations at Sao Joao 
                         do Cariri. The intrinsic periods for most of the waves were 
                         shorter than the observed periods, as a consequence, the intrinsic 
                         phase speeds were faster compared to the observed phase speeds. As 
                         a consequence, these waves can easily propagate into the 
                         thermosphere-ionosphere since the fast gravity waves can skip 
                         turning and critical levels. The strength and direction of the 
                         wind vector in the thermosphere must be the main cause for the 
                         observed anisotropy in the propagation direction of the periodic 
                         waves, even if the sources of these waves are assumed to be 
                         isotropic.",
                  doi = "10.5194/angeo-36-265-2018",
                  url = "http://dx.doi.org/10.5194/angeo-36-265-2018",
                 issn = "0992-7689",
             language = "en",
           targetfile = "paulino_intrinsic.pdf",
        urlaccessdate = "04 dez. 2020"
}


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