Abstract:On 08 April 2005, a strong gravity wave activity (more than 3 hours) was observed in São João do Cariri (7.4 o S, 36.5 o W).These waves propagated to the southeast and presented different spectral characteristics (wavelength, period and phase speed). Using OH airglow images, the parameters of 5 observed gravity waves were calculated; the wavelengths ranged from 90 to 150 km, the periods from ~26 to 67 min and the phase speeds ranged between 32 to 71 m/s. A reserve ray-tracing 15 analysis was performed to resea… Show more
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