Along-track interferometric (ATI) synthetic aperture radar (SAR) has proven a powerful tool for ground-moving target indication (GMTI). ATI-SAR systems use more than one antenna (at least two), mounted on a moving platform and displaced along the moving direction. Each SAR antenna provides a complex image of the same ground scene acquired with a very small time delay, depending on the separation (baseline) between the antennas. Starting from these interferometric images, ground-moving targets can be detected and their radial velocity estimated.

中文翻译：

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用于地面移动目标指示的沿航迹干涉 SAR 系统：成就、潜力和展望

沿航迹干涉 (ATI) 合成孔径雷达 (SAR) 已被证明是一种用于地面移动目标指示 (GMTI) 的强大工具。ATI-SAR 系统使用多个天线（至少两个），安装在移动平台上并沿移动方向移动。每个 SAR 天线提供以非常小的时间延迟获取的相同地面场景的复杂图像，这取决于天线之间的间隔（基线）。从这些干涉测量图像开始，可以检测地面移动目标并估计它们的径向速度。