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%ما هو (من)٪ 1 - تعريف
Doppler radar
![Doppler navigation system in the [[National Electronics Museum]]](https://commons.wikimedia.org/wiki/Special:FilePath/Doppler Radar Navigation Aid - National Electronics Museum - DSC00364.JPG?width=200 "Doppler navigation system in the [[National Electronics Museum]]")
![Doppler Effect: Change of [[wavelength]] and [[frequency]] caused by motion of the source.](https://commons.wikimedia.org/wiki/Special:FilePath/Doppler effect diagrammatic.svg?width=200 "Doppler Effect: Change of [[wavelength]] and [[frequency]] caused by motion of the source.")
![Doppler weather radar]] unit was obtained from the US Navy in the 1950s](https://commons.wikimedia.org/wiki/Special:FilePath/Wea01227 - Flickr - NOAA Photo Library.jpg?width=200 "Doppler weather radar]] unit was obtained from the US Navy in the 1950s")
TYPE OF RADAR EQUIPMENT
Vehicle speed radar; Doppler Radar; History of Doppler radar
A Doppler radar is a specialized radar that uses the Doppler effect to produce velocity data about objects at a distance. It does this by bouncing a microwave signal off a desired target and analyzing how the object's motion has altered the frequency of the returned signal.
Pulse-Doppler radar
RADAR SYSTEM
Pulse doppler radar; Pulse-doppler; Pulse Doppler Radar; Pulse doppler; Pulse Doppler; Pulse-Doppler; Pulse-doppler radar
A pulse-Doppler radar is a radar system that determines the range to a target using pulse-timing techniques, and uses the Doppler effect of the returned signal to determine the target object's velocity. It combines the features of pulse radars and continuous-wave radars, which were formerly separate due to the complexity of the electronics.
Radar Doppler Multitarget
TYPE OF MULTIMODE AIRCRAFT RADAR
RDY (Radar Doppler Multitarget)
Radar Doppler Multitarget (RDY in its French acronym) is a multimode Look-down/shoot-down Pulse-Doppler radar designed by Thomson-CSF (now Thales) for the Mirage 2000-5 fighter. The RDY-3 derivative has been fitted to Moroccan Mirage F1's.
أمثلة من مجموعة نصية لـ٪ 1
1. Today‘s standard Doppler radar is limited in what it can tell about rain – or birds.
2. They eschew Doppler radar and weather satellites and look for clues in the timeless rhythms of nature.
3. One of the breakthrough aspects of RAINEX is the use of the three aircraft equipped with Doppler radar.
4. On most flights, the ELDORA Doppler radar will collect data as a P–3 circles rainbands from six miles away, with occasional flights through a rainband as needed.
5. They‘ll use a technique called velocity track display (VTD), originally developed for hurricane studies, that allows scientists to extract three–dimensional wind information from a single Doppler radar.