Scanning: Difference between revisions
From Glossary of Meteorology
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<div class="definition"><div class="short_definition">In [[radar meteorology]], the motion of the [[radar]] antenna during data collection.</div><br/> <div class="paragraph">Scanning usually follows a systematic pattern involving one of the following: 1) In horizontal scanning, used to generate [[PPI]] displays, the [[antenna]] is continuously rotated in [[azimuth]] around the [[horizon]] or is rotated back and forth in a sector (sector scanning); at the completion of each 360° or [[sector scan]], the [[elevation angle]] of the scan typically is increased; 2) Vertical scanning, used to generate [[RHI]] displays, is accomplished by holding the azimuth constant while continuously varying the elevation angle of the antenna; at the completion of each vertical scan, the azimuth typically is incremented and the vertical scan proceeds in the opposite direction. <br/>''See also'' [[volume scan]].</div><br/> </div> | <div class="definition"><div class="short_definition">In [[radar meteorology]], the motion of the [[radar]] antenna during data collection.</div><br/> <div class="paragraph">Scanning usually follows a systematic pattern involving one of the following: 1) In horizontal scanning, used to generate [[PPI]] displays, the [[antenna]] is continuously rotated in [[azimuth]] around the [[horizon]] or is rotated back and forth in a sector (sector scanning); at the completion of each 360° or [[sector scan]], the [[elevation angle]] of the scan typically is increased; 2) Vertical scanning, used to generate [[RHI]] displays, is accomplished by holding the azimuth constant while continuously varying the elevation angle of the antenna; at the completion of each vertical scan, the azimuth typically is incremented and the vertical scan proceeds in the opposite direction. <br/>''See also'' [[volume scan|volume scan]].</div><br/> </div> | ||
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Latest revision as of 16:49, 25 April 2012
scanning[edit | edit source]
In radar meteorology, the motion of the radar antenna during data collection.
Scanning usually follows a systematic pattern involving one of the following: 1) In horizontal scanning, used to generate PPI displays, the antenna is continuously rotated in azimuth around the horizon or is rotated back and forth in a sector (sector scanning); at the completion of each 360° or sector scan, the elevation angle of the scan typically is increased; 2) Vertical scanning, used to generate RHI displays, is accomplished by holding the azimuth constant while continuously varying the elevation angle of the antenna; at the completion of each vertical scan, the azimuth typically is incremented and the vertical scan proceeds in the opposite direction.
See also volume scan.
See also volume scan.
