A Robust Method for Retrieving Ocean Internal Wave Parameters From SAR Imagery Using Iceemdan

Empirical mode decomposition (EMD) is a commonly used method for retrieving internal wave (IW) parameters. However, the EMD-based method often suffers from the issue of mode mixing in practical retrievals. In this paper, a robust IW parameters retrieval method based on the improved complete ensemble EMD with adaptive noise (ICEEMDAN) is proposed. The method is tested on an ERS-1 SAR image which clearly captured an IW over South China Sea. Also, the typical EMD method is adopted for comparison. The experimental results indicate that the proposed method can effectively address the issue of mode mixing, and obtain satisfying accuracy of the retrieved IW amplitudes and half-wave widths.