Abstract: A method for super-resolutio
n estimation of the ocean surface current for the HF ground wave radar is presen
ted based on spatial correlation of the ocean surface current being analyzed. Fi
rst, the sequences of sea echoes of each range call are separated in the frequen
cy domain, signal sources are separated near the Bragg peak in the frequency dom
ain and then special relativity between ocean surface currents is removed by the
technique of special smoothing. Finally, the method of MUSIC is used to estimat
e the DOA of the ocean surface currents in the frequency domain. Simulation resu
lts in real data show that the algorithm for super-resolution estimation of sea
echoes in effective and practical.

Key words: HF ground wave radar, super-resolution estimation, technique of special smoothing, MUSIC