| 释义 |
search radar search radar[′sərch ‚rā‚där] (engineering) A radar intended primarily to cover a large region of space and to display targets as soon as possible after they enter the region; used for early warning, in connection with ground-controlled approach and interception, and in air-traffic control. search radarA radar designed for the approximate location of (usually airborne) objects. Search radar beams are usually wide, wider in the vertical than in the horizontal, making it possible to scan large volumes of space quickly. In this system, a minute portion of a radio pulse transmitted from a site is reflected off an object and received back at the site. Search radar usually covers 360° in azimuth, although a sector search may be resorted to in exceptional cases. |