转动分量 meaning in English

component of rotation
rotative component

The motion of a moving target relative to the radar can be decomposed into two parts : the translational motion of a reference point in the target and the rotational motion of others about the reference point
目标和雷达的相对运动可以分解为目标上的参考点相对于雷达的平动以及目标绕参考点的转动。其中只有转动分量对成像有贡献，平动分量对成像无用而有害。
It is based on a proper decomposition of the ship motion in horizontal and vertical components . proper imaging intervals in order to obtain high quality ship images are selected using the estimated rotating angular velocity and doppler extension
它将转动分量作了水平、垂直分解,估计出旋转角速度和多普勒展宽,并借助于它们选择最优成像时间段以得到较高质量的舰船图像。