求翻译：首先根据船舶的耐波性理论分析了海面目标的微动特性，然后建立了海面目标的动态回波仿真模型，分别得到了海面目标横摇和纵摇引起的微多普勒模型。是什么意思？

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According to the first ship of the theoretical analysis of the surface of the target micro-manual features, and then established a goal of surface dynamic echo simulation models, respectively, by the sea target roll and pitch of micro-Doppler model.

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First of all, according to the ship's seakeeping theory analysis of fretting characteristics of sea target, and then establish a sea target dynamic echo simulation model, respectively, had been caused by sea target rolling and pitching of micro-Doppler model.

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