Abstract
When the ionosphere is sounded by a chirp signal, the information source is the amplitude and phase modulation of the signal due to its propagation in the ionospheric radio channel. We propose the method of received-signal demodulation which allows us to use the chirp ionosonde as a gauge for impulse characteristic and transfer function of the ionospheric radio channel. Operation of the chirp ionosonde is numerically simulated and estimates of intrinsic accuracy in measuring the mentioned characteristics are obtained.
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