VOLUME SCAN
A radar scanning strategy in which sweeps are made at successive antenna elevations (i.e., a tilt sequence), and then combined to obtain the three-dimensional structure of the echoes.
PPIs may be run in sequence, creating a "volume scan".PQPFProbabilistic QPF; a form of QPF (see below) that includes an assigned probability of occurrence for each numerical value in the forecast product.
Each has a Volume Scan consisting of 5 elevation angles (0.5 to 4.5 degrees) in ten minutes. VCP 31 has a long pulse length and provides a better signal-to-noise ratio permitting lower reflectivity returns to be detected.
One of the main things that the radar operator will do at the UCP is change volume scan strategies of the antenna.
The product is then updated every volume scan for the most recent hourly precipitation accumulation. It is used to:
Assess rainfall intensities and amounts, and ...
Composite Reflectivity(CR): This WSR-88D radar product displays the maximum reflectivities for each resolution grid box for all elevation angles in a volume scan.
Radar term indicating that the radar antenna is scanning through a series of antenna elevations in order to obtain a volume scan.
Tilted Storm ...
Tilt Sequence - Radar term indicating that the radar antenna is scanning through a series of antenna elevations in order to obtain a volume scan.
Storm Centroid - the location of the center of a given storm. The NEXRAD RPG runs a storm detection and tracking algorithm to determine storm centroids automatically for each volume scan ...
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.
to the centroid of the lowest storm component is to the right or the rear of the direction of motionTilt SequenceRadar term indicating that the radar antenna is scanning through a series of antenna elevations in order to obtain a volume scan.
 See also: Weather, Radar, Storm, Forecast, Water
  
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