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Authors: Cabrera, M. A.* 
Pezzopane, M.* 
Zuccheretti, E.* 
Ezquer, R. G.* 
Title: Satellite traces, range spread-F occurrence, and gravity wave propagation at the southern anomaly crest
Issue Date: 18-May-2010
Series/Report no.: 5/28(2010)
DOI: 10.5194/angeo-28-1133-2010
Keywords: Equatorial ionosphere
Ionosphereatmosphere interactions
Ionospheric irregularities
Subject Classification01. Atmosphere::01.02. Ionosphere::01.02.99. General or miscellaneous 
01. Atmosphere::01.02. Ionosphere::01.02.02. Dynamics 
01. Atmosphere::01.02. Ionosphere::01.02.04. Plasma Physics 
01. Atmosphere::01.02. Ionosphere::01.02.05. Wave propagation 
01. Atmosphere::01.02. Ionosphere::01.02.06. Instruments and techniques 
Abstract: Range spread-F (RSF) and occurrence of “satellite” traces prior to RSF onset were studied at the southern peak of the ionospheric equatorial anomaly (EA). Ionograms recorded in September 2007 at the new ionospheric station of Tucumán, Argentina (26.9° S, 294.6° E, dip latitude 15.5° S), by the Advanced Ionospheric Sounder (AIS) developed at the Istituto Nazionale di Geofisica e Vulcanologia INGV), were considered. Satellite traces (STs) are confirmed to be a necessary precursor to the appearance of an RSF trace on the ionograms. Moreover, an analysis of isoheight contours of electron density seems to suggest a relationship between RSF occurrence and gravity wave (GW) propagation.
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