See Also: radar(dictionary)
radar(encyclopedia)
radar(medicine)
radar(dictionary)
radar trap(dictionary)
Radar alert(finance)
Radar alert(money)
Radar - Sailing(gambling)
Radar Reflector - Sailing(gambling)
radio and radar astronomy(encyclopedia)

radar (iou)



radar noun. Orig. US. M20.
[from radio detection and ranging.]
A system (more fully primary radar) for detecting the presence of objects at a distance and determining their position or motion by transmitting short radio waves and detecting or measuring the return of these after being reflected by the objects; a similar system (more fully secondary radar) in which a return signal is automatically transmitted by the target when it receives the outgoing waves. Cf. RADIOLOCATION. M20.
(An) apparatus or an installation used for this system. M20.
fig. (A capacity for) intuitive perception or awareness. M20.
transf. A detection system which works on the principle of radar but uses signals other than radio waves; esp. lidar, sonar. M20.
Comb.: radar beacon a radio transmitter that automatically transmits a return signal (esp. a coded identification signal) when it receives a signal from a radar transmitter; radar fence a line of radar stations for giving warning of intrusions into the air space behind it; radar gun a hand-held device which uses Doppler radar to measure the speed of a moving object, as a vehicle or the ball in tennis, cricket, etc.; radar map: compiled from radar observations; radar net a network of radar stations, esp. a radar fence; radar picket a picket-boat specially equipped with radar; radar plotter a person who plots the direction and course of objects from radar observations; radar scanner a rotatable aerial for transmitting and receiving radar signals; radar screen the screen of a radarscope; radar-sonde a sonde which can be tracked by radar to obtain information on wind speed, wind direction, etc.; radar-track verb trans. track by radar; radar trap a speed trap in which a motorist's speed is measured using radar and the Doppler effect.
radarscope noun (the screen of) a cathode-ray oscilloscope on which radar echoes are represented for observation M20.