Radar speed gun
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A radar speed gun, also known as a radar gun, speed gun, or speed trap gun, is a device used to measure the speed of moving objects. It is commonly used by police to check the speed of moving vehicles
Handheld radar speed gun
A U.S. Army Military Police Corps officer using a radar gun at Tallil Air Base in Iraq
Disassembled radar speed gun. The copper cone is the microwave horn antenna. At the right end is the Gunn diode oscillator which generates the microwaves.
Doppler radar
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A Doppler radar is a specialized radar that uses the Doppler effect to produce velocity data about objects at a distance. It does this by bouncing a microwave signal off a desired target and analyzing
Radar speed gun
…enforcement, and in professional sports to measure speeds such as those of baseball pitches, tennis serves, and cricket bowls. A radar speed gun is a Doppler radar unit that may be handheld, vehicle-mounted, or static. It measures the speed of the objects at which it is pointed by detecting a change in frequency…
AN/APN-81 Doppler radar navigation system, mid-1950s
The US Weather Bureau's first experimental Doppler weather radar unit was obtained from the US Navy in the 1950s
Doppler navigation system in the National Electronics Museum