搜索装置、跟踪器、自动导引头都是试图要测定一个目标或一群目标的角位置。搜索装置的视场一般大于跟踪器和自动导引头,是设计用于截获(探测和定位)目标的。一旦目标探测和截获之后,搜索装置就成为跟踪器,或把目标转移到跟踪系统。自动导引头是装在导弹中提供制导信息的跟踪器。关于跟踪器所讨论的许多 Search devices, trackers, and automatic seekers are all trying to determine the angular position of a target or group of targets. The field of view of the search device is generally larger than the tracker and automatic seeker and is designed to intercept (detect and locate) the target. Once the target is detected and intercepted, the search device becomes a tracker, or the target is transferred to the tracking system. An automatic seeker is a tracker installed in a missile to provide guidance information. Many about the tracker discussed