Doppler radar
A radar unit that, in the velocity mode, determines the radial movement of airborne hydrometeor or aerosol targets either to or from the unit; based upon the Doppler Effect or Shift, ...
Doppler radar: weather radar system that employs the apparent shift in frequency of radio waves to perceive air motion and consequently predict tornadoes and precipitation sooner than previous radars, ...
Doppler Radar - a radar system that utilizes the Doppler effect for measuring the radial velocity of the wind (i.e., the motion toward or away from the radar) ...
Doppler radar - Radar that indicates radial (toward or away from the radar) wind speed as well as precipitation echoes; coherent radar.
Dry bulb temperature - The actual air temperature as measured by a sling psychrometer.
Doppler radar"A radar that detects and interprets the Doppler effect in terms of the radial velocity of a target.
DOPPLER RADAR: A type of weather radar that determines whether atmospheric motion is toward or away from the radar. It uses the Doppler effect to measure the velocity of particles suspended in the atmosphere.
Doppler Radar - 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).
DOPPLER RADAR Weather radar that measures direction and speed of a moving object, such as drops of precipitation, by determining whether atmospheric motion is horizontally toward or away from the radar.
Doppler Radar- radar that determines the intensity of rainfall and velocities of water and air particles; the National Weather Service uses a type of Doppler Radar called the WSR-88D, or NEXRAD; ...
Doppler radar: A radar that indirectly measures the wind speed by detecting the change of frequency due to the Doppler effect on radar waves that hit moving precipitation particles.
Doppler radar - Radar that measures speed and direction of a moving object, such as water or ice particles, birds, and insects.
Doppler radar Weather radar that determines the velocity of targets (precipitation, dust particles) moving directly toward or away from the radar unit based on the difference in frequency (or phase) between the outgoing and returning radar signal.
Doppler Radar - A type of radar that has the capacity of detecting motion direction.
Drizzle - Precipitation from stratus clouds consisting of tiny droplets.
Doppler Radar A new Weather Surveillance Radar (WSR-88D) system developed in 1988. About 120 systems were installed at Weather Forecast Offices. An additional 24 systems were installed at Department of Defense (Air Force Bases) sites.
Doppler Radar The Doppler radar is a type of weather survelliance radar which takes advantage of the Doppler effect.
Doppler Radar The weather radar system that uses the Doppler shift of radio waves to detect air motion that can result in tornadoes and precipitation, as previously-developed weather radar systems do.
What is Doppler Radar ?
"Doppler" radar is a special type of radar that makes use of the Doppler Effect to measure not only the distance of a target, but its velocity as well.
Doppler radars have a limited range of radial velocities that they can observe.
Doppler Radar currently used nationwide by the National Weather Service.
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Portions of glossary From the NWS
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DOPPLER RADAR: A type of weather radar which displays atmospheric motion. It utilizes the Doppler Effect to measure the velocity of particles in the atmosphere.
Doppler Radar- Sophisticated radar that can measure the speed and direction of moving objects, such as wind.
Downburst- A sudden, strong, downward blast of air, usually from a thundercloud.
DOPPLER RADAR - Radar device measuring a frequency shift in returned radio waves indicating the speed the target is moving toward and away from the antenna. This can return information on motions inside storm clouds, such as supercell thunderstorms.
The use of doppler radar systems such as NEXRAD allows for detection of tornadoes even when the hook echo is not present, and for greater certainty when it is.
As "seen" by Doppler radar, it is the component of motion parallel to the radar beam. (The component of motion perpendicular to the beam cannot be seen by the radar.
See Doppler radar, NEXRAD. Radarsonde A system in which radar techniques are used to determine the range, elevation, and azimuth of a radar target carried aloft by a radiosonde, ...
When used in reference to Doppler radar, it describes the change in radial velocity over short distances horizontally. SHEAR LINE A line of maximum horizontal wind shear.
A NWS network of about 140 Doppler radars operating nationwide.NGMThe Nested Grid Model, a 48-hour numerical model of the atmosphere run twice daily by NCEP.
VAACVolcanic Ash Advisory CentersVADVelocity Azimuth DisplayVAD Wind ProfileA radar plot of horizontal winds, derived from VAD data, as a function of height above a Doppler Radar.
Properly used, mesocyclone is a radar term; it is defined as a rotation signature appearing on Doppler radar that meets specific criteria for magnitude, vertical depth, and duration.
Tornado: A tornado is dectected by Doppler Radar. 17. Tornado: Tornado Alley: Midwest US. 18. Tornado: Tornado Watch/Warnings Issued issued by the NWS. 19. Tornado: Waterspout: Tornado are over water. 20.
An image of a tornado on the Doppler radar screen that shows up as a small region of rapidly changing wind speeds inside a mesocyclone.
A radar plot of horizontal winds, derived from VAD data, as a function of height above a Doppler Radar.
Doppler radar signature in the radial velocity field indicating intense, concentrated rotation - more so than a mesocyclone.
Nexrad - It's the "NEXt generation weather RADar", a nationwide network of 120 Doppler radars being used by National Weather Service meteorologists to detect precipitation, to measure atmospheric motions and to issue warnings of severe weather.
NEXRAD- Next Generation Radar. Reflectivity and Doppler Radar used by NWS offices.
NGM- Nested Grid Model. A synoptic forecast model for short term forecasting. ...
Technologically-advanced weather radar being deployed to replace WSR-57 and WSR-74 units in the US. NEXRAD is a high-resolution Doppler radar with increased emphasis on automation, including use of algorithms and automated volume scan.
Tornado Warning- Issued when a tornado is imminent or occurring. This includes when a tornado is indicated by Doppler radar or sighted by spotters. Action: Seek safe shelter immediately.
The variation in wind speed (speed shear) and/or direction (directional shear) over a short distance. Shear usually refers to vertical wind shear, i.e. the change in wind with height, but the term is also used in Doppler radar to describe changes in ...
Variation in wind speed (speed shear) and/or direction (directional shear) over a short distance within the atmosphere. Shear usually refers to vertical wind shear, i.e., the change in wind with height, but the term also is used in Doppler radar to ...
Additional information provided by a radar about a target may include the radial velocity or rate of change of range, as measured by a Doppler radar, or the depolarizing characteristics of the target, as measured by a polarimetric radar.
 See also: Radar, Weather, Storm, Temperature, Pressure
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