Abstract:Key Points: * Gravity waves impacts in the anomalous responses of the F layer over Brazil during a counter electrojet event; * Some signatures in ionograms suggest the gravity wave as responsible for the CEJ occurrence in this day. Abstract In this work, we report the ionospheric F-layer responses over the Brazilian equatorial sector to a counter electrojet (CEJ) event that occurred during the solar minimum period of June 2009. The data collected by the Digisonde over São Luis (2.33°S; 44°W; dip in 2009:-5.7°)… Show more
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