Difference between revisions of "Wsr-88d"

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<div class="definition"><div class="short_definition">(Abbreviation for Weather Surveillance Radar&ndash;1988 Doppler.) The [[weather radar]], sometimes  called [[NEXRAD]], that became the operational network radar for the U.S. National Weather  Service, U.S. Air Force, and Federal Aviation Administration during the early and middle 1990s.</div><br/> <div class="paragraph">It is a general-purpose weather radar with a [[wavelength]] of 10.5 cm, a [[peak power]] of 750  kW, selectable [[pulse duration]] of 1.57 or 4.0 &mu;s, and selectable [[pulse repetition frequency]] from  318 to 1304 Hz. A coherent [[Doppler radar]], it employs a center-fed [[parabolic antenna]] with a  diameter of 8.5 m, producing a [[beamwidth]] of 0.95&#x000b0;. Received signals are analyzed using the  method of [[pulse-pair processing]] to give as fundamental data the [[reflectivity factor]], [[mean  Doppler velocity]], and [[Doppler spread]] as functions of time and location relative to the radar.  The [[maximum unambiguous range]] is ordinarily 460 km for [[reflectivity]] and 115 km for Doppler  information. Many kinds of computer algorithms are employed for identifying features such as  vortices, downbursts, and fronts.</div><br/> </div>
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<div class="definition"><div class="short_definition">(Abbreviation for Weather Surveillance Radar&ndash;1988 Doppler.) The [[weather radar]], sometimes  called [[NEXRAD]], that became the operational network radar for the U.S. National Weather  Service, U.S. Air Force, and Federal Aviation Administration during the early and middle 1990s.</div><br/> <div class="paragraph">It is a general-purpose weather radar with a [[wavelength]] of 10.5 cm, a [[peak power]] of 750  kW, selectable [[pulse duration]] of 1.57 or 4.0 &mu;s, and selectable [[pulse repetition frequency]] from  318 to 1304 Hz. A coherent [[Doppler radar]], it employs a center-fed [[parabolic antenna]] with a  diameter of 8.5 m, producing a [[beamwidth]] of 0.95&#x000b0;. Received signals are analyzed using the  method of [[pulse-pair processing]] to give as fundamental data the [[reflectivity factor]], [[mean Doppler velocity|mean  Doppler velocity]], and [[Doppler spread]] as functions of time and location relative to the radar.  The [[maximum unambiguous range]] is ordinarily 460 km for [[reflectivity]] and 115 km for Doppler  information. Many kinds of computer algorithms are employed for identifying features such as  vortices, downbursts, and fronts.</div><br/> </div>
 
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Latest revision as of 18:17, 25 April 2012



WSR–88D

(Abbreviation for Weather Surveillance Radar–1988 Doppler.) The weather radar, sometimes called NEXRAD, that became the operational network radar for the U.S. National Weather Service, U.S. Air Force, and Federal Aviation Administration during the early and middle 1990s.

It is a general-purpose weather radar with a wavelength of 10.5 cm, a peak power of 750 kW, selectable pulse duration of 1.57 or 4.0 μs, and selectable pulse repetition frequency from 318 to 1304 Hz. A coherent Doppler radar, it employs a center-fed parabolic antenna with a diameter of 8.5 m, producing a beamwidth of 0.95°. Received signals are analyzed using the method of pulse-pair processing to give as fundamental data the reflectivity factor, mean Doppler velocity, and Doppler spread as functions of time and location relative to the radar. The maximum unambiguous range is ordinarily 460 km for reflectivity and 115 km for Doppler information. Many kinds of computer algorithms are employed for identifying features such as vortices, downbursts, and fronts.