Geomagnetic activity effect over continuous Doppler sounding records in Tucuman

MARIANO FAGRE; ANA G. ELIAS; MIGUEL A. CABRERA; JAROSLAV CHUM

Sunny Beach

Workshop; 7th Workshop: Solar Influences on the Magnetosphere, Ionosphere and Atmosphere; 2015

Space Research and Technology Institute, Bulgarian Academy of Sciences

The Institute of Atmospheric Physics in Prague, Czech Republic, has developed, constructed and installed several continuous HF Doppler sounders, including special software. One of the goals is for studying gravity waves in the ionosphere taking into account that HF Doppler technique is a sensitive method for monitoring transient changes and wave activity in the ionosphere, and that abetter understanding of atmospheric gravity waves will be extremely useful in the study of coupling between different atmospheric regions. In this works we analyze data obtained from the system installed in Tucuman (26.8 S; 65.2 W), Argentina, in 2012, to study the effects of different levels of geomagnetic activity over the continuous Doppler sounding records. Quiet and disturbed days were selected according to Dst index values for the periods with data availability. A preliminary qualitative description of the observed effects is made compared to theoretically expected results.