片语
Surveillance Radar ApproachIn aviation, approach surveillance radar (ASR or SRA) is a type of radar instrument approach provided with active assistance from air traffic control. The only airborne radio equipment required for radar approaches is a functioning radio transmitter and receiver.
approach surveillance radar进场监测雷达
air surveillance radar approach空中监视雷达进近
ASR Approach Surveillance Radar进场监视雷达