Ionospheric pulse time dispersion including effects of Earth´s magnetic field

For frequencies above 100 MHz, the distortion due to ionospheric dispersion has been evaluated in the past for the assumption that the earth\´s magnetic field can be neglected. It is shown that for noncircularly polarized signals, conditions can exist at even -band where the ionosphere distortion due to the presence of the earth\´s magnetic field can be significant. A simple expression relating the Faraday rotation to the ionospheric dispersion due to the earth\´s magnetic field is given. An example is presented which shows that the Faraday rotation can be as much as at -band.