Abstract
A computer model is presented for the performance assessment of HF ionospheric communication links.
The proposed model considers the effects of the natural and artificial ionospheric disturbances on the
radio waves propagation parameters and modes. The ionosphere and radio wave parameters are first
derived for specified ionospheric communication links. The natural and/or artificial disturbances are
assumed over the link path, and the resulting modified propagation medium and wave parameters are
then estimated and compared with their corresponding parameters for quiet ionosphere. Hence, the link
performance is evaluated and guide lines for retuning the communication link are proposed to control
(enhance or disrupt) the ionospheric communication links. The ionosphere and wave parameters are
derived for different communication links subjected to natural disturbances due to different solar
activities, solar flares, and geomagnetic storms. Several communication links are also analyzed under
the effect of artificial modification by HF ionospheric heaters.