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 ?
According to Doppler radar testing, the BC numbers that manufacturers advertise for their tipped bullets are optimistic, sometimes in the extreme.
(1.) Wang, Y., Liu, Q., and Fathy, A.E., "Simultaneous Localization and Respiration Detection of Multiple People Using Low Cost UWB Biometric Pulse Doppler Radar Sensor."
Doppler radar data showed no thunderstorms over the loss location during the entire day of the alleged incident.
The new technology involves the radar network called ''X-Net'' that monitors wind and rainfalls with the use of the latest models of ''doppler radars'' set up in five locations in and around Tokyo.
The Electra doppler radar and a laser were installed on aircraft 154587 during an extensive modification for the BAMEX project, and this aircraft will be used in upcoming atmospheric research projects.
Witnessing a tornado requires both being skilled at weather forecasting--using tools such as mobile Doppler radar, Global Positioning Systems, and continuous updates from the National Weather Service--and being in the right place at the right time.
These microwave applications include alarm systems, antennas, base station resonators, combiners, dielectric resonator oscillators, doppler radar systems, down converters, inductors, low noise blocks, microwave filters and voltage-controlled oscillators.
State-of-the-art facilities include a Virtual Nursing Learning Center, VisBox virtual-learning system, theater, non-linear video editing lab, 16-inch computer-controlled reflecting telescope, DNA sequencing, weather station with Doppler radar and the new Christopher Center for Learning and Information Resources.
The Swing Speed Radar is a microwave Doppler radar velocity sensor that helps assist players in developing and optimizing their swing speed by providing a convenient real-time measure of their swing velocity.
The two meteorological towers and an expanded Doppler Radar program are part of the project's overall wind assessment data gathering package, which Boileau says is critical in knowing where to place their turbines to make maximum use of the wind.
Sports Sensors' new Arrowspeed RADARchron[R] is a small, inexpensive microwave Doppler radar velocity sensor that measures the speed of an arrow as it's launched from the bow.
Digital Cyclone has introduced Mobile My-Cast, a service that provides up-to-the-minute weather forecasting and local Doppler radar directly to the screen of Motorola mobile phones.