逆合成孔径是指雷达天线不动，被观测目标移动，对移动中的目标回波进行相干处理获得大的合成孔径，从而得到高方位尺寸分辨率。逆合成孔径的基础是转台成象。(The inverse synthetic aperture means that the radar antenna is not moving, the target is moved, and the target echo is processed coherently to get the large synthetic aperture,