primary surveillance radar meaning in Chinese

一次监视雷达

A primary surveillance radar detects and provides both range and bearing information of an aircraft within its effective coverage
一次监察雷达能探测覆盖范围以内之飞机距离及方向资料。
The existing long range primary surveillance radar at mount parker has been used for more than 20 years and is approaching the end of its operational life
目前设于柏架山的长距离一次监察雷达，已经运作了20多年，使用期快将完结。
A ssr can provide more useful information than primary surveillance radar ( psr ) but is subject to the proper functioning of the aircraft s transponder
二次监察雷达较一次监察雷达能提供更多有用的资料，但须依赖航机上应答器之正常运作。
For more than 25 years , the old radar served as a primary surveillance radar ( psr ) with coverage of 200 nautical miles for en - route air traffic surveillance . it is necessary to replace the old radar because of its age and difficulty in acquiring spares
运作逾二十五年的旧雷达为一支监察雷达，具备二百海里以内航空交通航路监察功能。由于旧雷达老化，及采购该雷达的零件亦十分困难，故有需要进行更换。