Doppler radar is a radar using the doppler effect of the returned echoes from targets to measure their radial velocity. It is a radar that produces a velocity measurement as one of its outputs.
Doppler radars are used in air defense, air traffic control, sounding satellites, police speed guns, and radiology.
The above is a doppler radar image taken at Buckland Park, Australia, indicating direction of winds (shown with arrows) and velocity of wind speeds (indicated by colors).
Recent weather radars process velocities of precipitations by Pulse-Doppler radar technique, on top of their intensities. Above is a pulse-doppler radar map of Hurricane Ivan, which struck the gulf coast on September 16, 2004.
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