| 单词 | precision approach radar |
| 释义 | > as lemmasprecision approach radar precision approach radar n. a ground-based radar system used to follow accurately the approach of an aircraft and to enable landing to be supervised from the ground. ΘΚΠ the mind > attention and judgement > discovery > instrument for detection > [noun] > radar system radiolocation1935 televisibility1940 radar1941 precision approach radar1950 PAR1951 MTI1956 AWACS1966 1950 Electronics Feb. 71/1 (heading) Airport surveillance and precision approach radar (GCA). 1965 J. L. Nayler & E. Ower Aviation To-day xvii. 250/2 Ground Controlled Approach.., also known as Precision Approach Radar, gives the position of an approaching aircraft in elevation, azimuth, and range relative to the touch-down point on the runway. 1997 AOPA Pilot Nov. 45 During an electrical failure..a precision approach radar..may be your only ticket to the ground in one piece. < as lemmas |
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