Determinação dos parâmetros de onda de um distúrbio ionosférico propagante através do imageamento do 0I6300.

Abstract

Internal gravity waves are oscillations in the field variables of the atmosphere. The existence of these waves is due to the buoyancy of the fluid through which they propagate. These waves propagate vertically and the generating sources of this phenomenon has long been an object of study among scientists, and may include, among other factors, cold fronts, strong tropospheric convection, thunderstorms and orographic effects (Gardner, 1995 , cited WRASSE, 2004). These waves assume a role of paramount importance in the transfer of momentum and energy between the lower atmosphere, a region where they are generated, and the middle atmosphere, the saturation region where these waves. These waves penetrate the ionosphere, a layer placed in a range of approximately 60 km to 1000 km altitude, generate disturbances and change the settings of this layer. These disturbances in the ionosphere generated by internal gravity waves that reach, gain a particular name called Ionospheric Disturbances propagating or TIDs ("Traveling Ionospheric Disturbances"). The objective of this work is the analysis of a particular event ionospheric disturbance, namely the event on the 20 September 2006, held in São João do Cariri (7.38 ° S, 36.54 ° W), through the imagery of the airglow OI6300 as well as the identification of parameters of the wave generating this particular disorder (direction of wave propagation, speed, amplitude and period) using the technique of Keograma. The main conclusions were the result of reading the Keogramas is generated according to the calculated angle of azimuthal direction, and wave parameters are provided in accordance with the literature of the medium-scale ionospheric disturbances, the MSTIDs as planned.