Location of first-order sea echo for HFSWR with image feature information

Abstract

Influenced by ships, ionosphere interference and Bragg peak-splitting, it will be difficult of detecting or tracking HF first-order sea echo (Bragg peak) exactly. A new detection method is proposed which regards image feature of Bragg peaks in multi-scale space as indicative information and combines with global characteristics such as amplitude, symmetry, and continuity etc. Detection rules for both single and splitting Bragg peaks are also given based on characteristics knowledge. Experiment with real data shows that comparing to those classical algorithms the proposed method can detect and locate first-order sea echo more accurately in the environment with ionosphere interference, ships and clutter/noise smearing far from coast.