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Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (https://creativecommons.org/licenses/by/4.0/).
The time−domain waveforms for the three normalized S−RN signals; (a) Ship I signal; (b) Ship II signal; (c) Ship III signal; (d) Ship IV signal; (e) Ship V signal.