Observations of gravity waves of meteorological origin in the F-Region ionosphere

Wavelet characterisation of ionospheric acoustic and gravity waves occurring during the solar eclipse of August 11, 1999

“…However, such ideal comparisons cannot be simply performed due to the lack of the corresponding measurements. Comparisons can be drawn against studies of 5-min ionospheric sounding, such as those in , Bosˇka and Sˇauli (2001), Bosˇka et al (2003), Martinis and Manzano (1999), Sˇauli and Bosˇka (2001) and Sˇauli et al (2005), satellite or rocket measurements such as Bertin et al (1978) and Kelley (1997), arrays of ionosonds as reported in Somsikov (1991) and many others. We can compare the times of occurrence, differences and similarities in the vertical structure and source location.…”

Generation of large-scale equatorial F-region plasma depletions during lowrange spread-F season

“…Also, several investigators (e.g. Bertin et al, 1978;Meriwether et al, 1996;Kelley, 1997;Boska andSauli, 2001 andFagundes et al, 2001) have presented studies related to the influence of tropospheric disturbances at the thermospheric/F-region heights. Therefore, an attempt was made to look for the causes below the ionosphere, i.e.…”

Forcing of the ionosphere by waves from below

“…Their lower cutoff period is given by the so-called BruintVaisala frequency. They were observed in the lower ionosphere (e.g., Bosˇkova´and Lasˇtovicˇka, 2001) as well as in the E-and F-region ionosphere (e.g., Hocke and Schlegel, 1996;Matthews, 1998;Altadill et al, 2001a, b;Bosˇka and Sˇauli, 2001;Bosˇka et al, 2003;Sˇauli and Bosˇka, 2001). Gravity waves are either of ''meteorological'' origin coming from below, or are of auroral origin coming quasihorizontally from the auroral zone, or are excited in situ for instance by the solar terminator passage or solar eclipse.…”