DEFINITION OF DOPPLER RADAR

Doppler is the principle discovered by Austrian

scientist Christian Doppler in 1842 that describes the

characteristics of sound waves or radio waves that travel

from a source and are reflected by a medium back toward the

source. Today the advanced radar known as Doppler radar is

named after the Austrian scientist; it is mainly used by meteorologists

to forecast the weather and also as a real-time picture

of advancing weather systems.

Modern Doppler radars operate much like regular radar

but also provide radial velocity images, which are useful to

provide the users a three-dimensional image of the object

medium. Doppler waves that are reflected by objects moving

away from the source provide a lower frequency, while

objects moving toward the source return at a higher frequency,

providing three-dimensional radial velocities. Doppler

radar provides scientists with a way of viewing large-scale

objects such as hurricanes that have different internal velocities

and vectors.

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