Diurnal variation of gravity wave activity at midlatitudes in the ionospheric F region

J. Boška, P. Šauli, D. Altadill, J. German Solé, L. F. Alberca

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Resum

We investigate the short-term fluctuations in the period range from 15 to 180 minutes in the electron density variations of the F region ionosphere. Electron density profiles obtained at the ionospheric stations of Pruhonice (49.9° N, 14.5° E) and Ebro (40.8° N, 0.5° E) at five minute time sampling have been used for this analysis. The diurnal changes of the activity of the acoustic gravity wave fluctuations (AGW) show a clear enhancement during and several hours after sunrise. The periods of such AGW's are about 60 to 75 minutes and these waves propagates vertically through the ionosphere from a source located at an altitude of 180-220 km. The most likely source for these events seems to be passage of the Solar terminator.

Idioma originalAnglès
Pàgines (de-a)579-586
Nombre de pàgines8
RevistaStudia Geophysica et Geodaetica
Volum47
Número3
DOIs
Estat de la publicacióPublicada - 2003
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