Doppler radar


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Doppler radar

[′däp·lər ′rā‚där]
(engineering)
A radar that makes use of the Doppler shift of an echo due to relative motion of target and radar to differentiate between fixed and moving targets and measure target velocities.

Doppler radar

A radar that detects and interprets the Doppler effect (Doppler frequency shift) in terms of the radial velocity of a target. It differentiates between fixed and moving targets by detecting and measuring the apparent change in frequency of the reflected wave caused by the motion of the target or the observer. It can also serve as an airborne navigational aid by giving ground speed and drift. In this mode, it uses an aircraft compass system as its directional reference. The system is less accurate than the inertial navigation system, or OMEGA. See Doppler shift. See also inertial navigation system and OMEGA.

Doppler radar

A system for measuring speed that is based on the Doppler effect. It is used in police radar systems as well as for measuring the velocity of hurricanes and tornadoes. See Doppler effect.
References in periodicals archive ?
Many stations currently use Nexrad Doppler Radar, which gives data six to ten minutes old.
The National Weather Service's Doppler radars can detect most precipitation within about 90 miles of the radar, and intense rain or snow within about 155 miles.
But on June 2, 1995, Wurman and his colleagues succeeded in bringing their Doppler radar to within 1.
Pocket Radar utilizes a Doppler radar signal detection and processing system coupled with re-engineered microwave and antenna components to deliver the same powerful performance of traditional bulky radar guns, in a device compact enough to easily fit into a shirt pocket.
The project is worth about P100 million and include the building and the Doppler radar equipment.
The Doppler radar, which helps the National Weather Service predict winter storms approaching Santa Barbara, Ventura and Los Angeles counties, has been controversial since its installation earlier in the 1990s.
Utilizing a Doppler radar signal detection and processing system coupled with re-engineered microwave and antenna components, Pocket Radar is able to deliver the same powerful performance of traditional bulky radar guns, in a device compact enough to easily fit into a shirt pocket.
Further, BAE, Doppler radar specialist Weibel has teamed in chase of the deal as the air surveillance radar and multiple object tracking radar for the facility.
The Tioga County center also will feature Doppler radar weather information provided by AccuWeather in State College, Centre County.
With today's state-of-the-art technology, the weather service has great Doppler radar looking at the atmosphere.
Wind profilers use Doppler radar and operate much like the radar guns police use to nab speeders.
The subject of procurement, installation and abandonment of consideration (rent) authority to use 8 devices to measure the speed of vehicles using Doppler radar or by induction loops and 8 devices to detect failure light signal at danger.