Radial Velocity measured by Doppler radars
Doppler radars can measure the component of the velocity of targets toward or away from the radar. This component is called the "radial velocity".
radial velocity"The component of a three-dimensional velocity vector oriented along the radial direction from the origin point or axis in polar, cylindrical, or spherical coordinates.
Radial Velocity - Component of motion toward or away from a given location. 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.
RADIAL VELOCITY A type of velocity that expresses motion toward or away from a given location. In Doppler radar, it is the component of motion that is parallel to the radar beam.
Radial Velocity - permalink - collapse
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Component of motion toward or away from a given location. As "seen" by Doppler radar, it is the component of motion parallel to the radar beam.
The highest radial velocity that can be measured unambiguously by a pulsed Doppler radar. The maximum unambiguous velocity is related to the radar's successive pulses of emitted energy.
SRV - Storm Radial Velocity. The rotational speed of rotating convection, such as a supercell thunderstorm, that is measured by a Doppler weather radar and computer.
Storm Relative Mean Radial Velocity Map(SRM): This WSR-88D radar product depicts a full 360º sweep of radial velocity data with the average motion of all identified storms subtracted out. It is available for every elevation angle sampled.
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.
Doppler velocity refers to spectral density first moment, radial velocity to base data.Mean Low Water(MLW) - A tidal datum. The average of all the low water heights observed over the National Tidal Datum Epoch.
Volume Velocity ProcessingA way to guess the large-scale 2-dimensional winds, divergence and fall speeds from one-dimensional radial velocity data.
BASE DATAThose digital fields of reflectivity, mean radial velocity, and spectrum width data in spherical coordinates provided at the finest resolution available from the radar.
Storm Relative Mean Radial Velocity Region (SRR) This WSR-88D radar product depicts a 27 nm by 27 nm region of storm relative mean radial velocity centered on a point which the operator can specify anywhere within a 124 nm radius of the radar.
Velocity Azimuth Display (VAD): This WSR-88D radar product displays a graphical plot of mean radial velocity versus azimuth angle for a particular altitude.
Doppler radar signature in the radial velocity field indicating intense, concentrated rotation - more so than a mesocyclone.
Tornado Vortex Signature- Doppler radar signature in the radial velocity field indicating intense, concentrated rotation - more so than a mesocyclone.
Maximum Unambiguous Velocity - the highest radial velocity that can be measured unambiguously by a pulsed Doppler radar. The maximum unambiguous velocity is related to the radar's PRF.
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).
It can determine the radial velocity of atmospheric targets moving directly toward or away from the radar unit based on the change in the frequency between the outgoing and returning (reflected) radar signal.
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 radial velocity ...
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 describe changes in radial velocity ...
If however, the target where flying directly toward (or away from) the radar site, then the measured velocity would be the actual velocity. The velocity component of a target relative to the radar beam is referred to as the "radial velocity".
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: Velocity, Radar, Weather, Precipitation, Temperature
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