利用这些差异可以排除不需要的杂波，识别船舶目标的回波。
This paper analyzes the differences of the space paremeters between the ship and other objects, thereby the characteristics of the various return waves are obtained.
目标模型包括船舶的距离、方位、速度和回波幅度、幅度起伏。
The model of radar target is composed of distance, bearing, speed, heading and amplitude of echo, fluctuation.
然而，作为航海雷达图像模拟的方向，系统建模与仿真技术基本没有应用于民用船舶导航雷达模拟器中，特别是对船舶导航雷达模拟器中雨雪回波图像的模拟。
However, they are hardly used for civil ship navigation radar simulator, especially not for the simulation of echo images of rain and snow in ship navigation radar simulators.
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