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We propose a method for carrying out experimental studies into the effect of dispersion in transionospheric radio channel, taking into account system and geophysical factors separately. The method is based on the mathematical model of frequency dispersion, which is distinguished by introducing a reference frequency. This allowed us to separate geophysical and frequency variables in studying dispersion. Experiments were focused on the features of the influence of geophysical factors on the frequency dispersion in wideband channels at the reference frequency. There is presented a rule for its recalculation into different operating frequencies. The features of phase dispersion depending on the latitude of the signal receiver were revealed.

Regional and temporal changes in the main parameters of frequency dispersion in wideband transionospheric radio communication channels