By tracking changes in the speed and direction of wind and precipitation. Doppler radar helps detect when dangerous rotational patterns are developing precursors to things like tornadoes and hurricanes. The installation of short-range Doppler radar at airports has given air traffic controllers the ability to know when conditions are ripe for microbursts or wind shear, a phenomenon that has caused planes to crash at takeoff and landing. Astronomers have applied the Doppler effect-the change in the wavelength of light emitted by a moving star to show that galaxies are moving away from one another Meteorologists use the phenomenon to improve their ability to warn of imminent weather.
How Doppler Radar works
Doppler Radar is a kind of specialized radar which makes use of Doppler effect for producing velocity data regarding objects which are present at some distance. The radar carries out this job by bouncing a certain microwave signal from a preferred object and by analyzing the alteration in the object’s frequency of returned signal through motion. It is this variation that is used in getting highly accurate and direct measurements of radiant constituent of an object’s velocity in relation to the Doppler radar. These radars are used in different fields like sounding satellites, aviation, police speed guns, healthcare, radiology, bistatic radar and meteorology.
The Doppler radar used in weather forecasting measures the direction and speed, or velocity, of objects such as drops of precipitation.
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