The 22-year cycle in the geomagnetic 27-day recurrences reflecting on the F2-layer ionization

by E. M. Apostolov, D. Altadill, M. Todorova
Published 2004-04-01

Spectral energy contributions of quasi-periodic oscillations (2-35 days) to the variability of the f_oF2

by E. M. Apostolov, D. Altadill, R. Hanbaba
Published 1998-02-01

Solar cycle and seasonal behaviour of quasi two and rive day oscillations in the time variations of fOF2

by D. Altadill, L. Alberca, E. M. Apostolov
Published 1994-06-01

First observation of quasi-2-day oscillations in ionospheric plasma frequency at fixed heights

by D. Altadill, J. G. Solé, E. M. Apostolov
Published 1998-05-01

Six-day westward propagating wave in the maximum electron density of the ionosphere

by D. Altadill, E. M. Apostolov, Ch. Jacobi, N. J. Mitchell
Published 2003-07-01

Planetary and gravity wave signatures in the F-region ionosphere with impacton radio propagation predictionsand variability

by P. Sauli, J. Lastovicka, J. Boska, E. M. Apostolov, D. Altadill
Published 2004-06-01