Artículos de revistas
Propagation of gravity waves and spread F in the low-latitude ionosphere over Tucumán, Argentina, by continuous Doppler sounding: first results
Fecha
2014-08Registro en:
Šindelářová, T.; Cangemi, José Ignacio; Ise, Juan Eduardo; Molina, Maria Graciela; Hruška, F.; Baše, J.; et al.; Propagation of gravity waves and spread F in the low-latitude ionosphere over Tucumán, Argentina, by continuous Doppler sounding: first results; American Geophysical Union; Journal of Geophysical Research; 119; 8; 8-2014; 6954-6965
0148-0227
CONICET Digital
CONICET
Autor
Chum, J.
Miranda Bonomi, Fernando Alberto
Fišer, J.
Cabrera, M. A.
Ezquer, Rodolfo Gerardo
Burešová, D.
Laštovička, J.
Baše, J.
Hruška, F.
Molina, Maria Graciela
Ise, Juan Eduardo
Cangemi, José Ignacio
Šindelářová, T.
Resumen
Results of systematic analysis of propagation directions and horizontal velocities of gravity waves (GWs) and spread F structures in low-latitude ionosphere (magnetic inclination ~27°) in Tucumán region, Argentina, are presented. Measurements were carried out by multipoint continuous Doppler system during 1 year from December 2012 to November 2013. It was found that meridian propagation of GWs dominated and that southward propagation prevailed in the local summer. Oblique spread structures observed in Doppler shift spectrograms and associated with spread F propagated roughly eastward at velocities from ~70 to ~180 m/s and were observed at night from ~ September to ~ March. The velocities were computed for 182 events and the azimuths for 64 events. Continuous Doppler sounding makes it possible to analyze more events compared to optical observations often used for propagation studies since the measurements do not depend on weather.