A cascaded correction method to reduce the contamination of ionospheric frequency modulation for HF skywave radars

From the presented simulations and others not shown here, we conclude that the proposed cascaded correction method provides an efficient way to reduce the contamination of ionospheric frequency modulation for the HF skywave radar even in a serious case where the contaminated Bragg lines in Doppler domain overlap. The idea of the cascaded correction also implies the possibility that we can achieve correction gain from integration of the advantages of different correction methods.