A radar that is part of an early warning system WordNet 3.0 & Open English WordNet

An early-warning radar is any radar system used primarily for the long-range detection of its targets, i.e., allowing defences to be alerted as early as possible before the intruder reaches its target, giving the air defences the maximum time in which to operate. Wikipedia

A radar detection system Wikipedia Disambiguation

Form of radar system Wikidata