起伏目标 meaning in Chinese

fluctuating target

The way reduces the error . this paper also particularizes the prime parameter of the echo - - radar cross section ( rcs ) which is influenced by many factors . considering the fluctuation of rcs and the modulation by the radar antenna , the paper contains both slow and quick fluctuating targets
两种回波的仿真数据表明：仿真结果与理论模型的结论符合很好，能够满足运动目标回波幅度分布特性的要求；并且在多数情况下，雷达探测到的目标都是慢起伏目标。