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<a accesskey="3" href="page.php?w=Doppler_radar&amp;p=2">3.Next</a>
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<p>A <b>Doppler radar</b> is a specialized <a href="page.php?w=radar">radar</a> that uses the <a href="page.php?w=Doppler_effect">Doppler effect</a> to produce <a href="page.php?w=velocity">velocity</a> data about objects at a distance. It does this by bouncing a <a href="page.php?w=microwave">microwave</a> signal off a desired target and analyzing how the object's motion has altered the frequency of the returned signal. This variation gives direct and highly accurate measurements of the <a href="page.php?w=wikt%3Aradial">radial</a> component of</p><p>
<a accesskey="3" href="page.php?w=Doppler_radar&amp;p=2">3.Next</a>
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