DOPPLER RADAR

radar system that can differentiate between moving and stationary targets by analyzing frequency changes caused by the Doppler effect

Doppler radar uses the Doppler effect to measure the radial velocity of targets in the antenna's directional beam. The Doppler effect shifts the received frequency up or down based on the radial velocity of target (closing or opening) in the beam, allowing for the direct and highly accurate measurement of target velocity.
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Any form of radar which detects motion relative to a reflecting surface by measuring the frequency shift of reflected radio energy due to the motion of the observer or of the reflecting surface. 1/12/76

Radar qui détecte tout déplacement d'une surface réfléchissante en mesurant le décalage de fréquence de l'énergie radio réfléchie dû au déplacement de l'observateur ou de la surface réfléchissante. 1/12/76

Radar that can measure radial velocity , the instantaneous component of motion parallel to the radar beam (i.e., toward or away from the radar antenna).

Eng: doppler radar
Urdu: ریڈار کا نِظام جو طُول موج کے مُنعکس ہونے والے اِرتعاش میں تبدیلی کے ذریعے بناتا ہے ۔