Difference between revisions of "Linear depolarization ratio"

From Glossary of Meteorology
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<div class="definition"><div class="short_definition">(Abbreviated LDR.) The ratio of the [[power]] received in the [[orthogonal]],  or cross-polarized, channel to that received in the transmission, or copolarized, channel of a [[dual-  channel radar]], when a linearly polarized [[signal]] is transmitted.</div><br/> <div class="paragraph">Because the main component of the linearly polarized, backscattered signal from [[hydrometeors]]  has the same [[polarization]] as the transmitted polarization, the linear depolarization ratio yields a  value less than unity or, equivalently, a negative [[decibel]] quantity. Note that relative to the [[receiver]]  channels of the radar the linear depolarization ratio is defined inversely to the [[circular depolarization  ratio]].</div><br/> </div>
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<div class="definition"><div class="short_definition">(Abbreviated LDR.) The ratio of the [[power]] received in the [[orthogonal]],  or cross-polarized, channel to that received in the transmission, or copolarized, channel of a [[dual-channel radar|dual-  channel radar]], when a linearly polarized [[signal]] is transmitted.</div><br/> <div class="paragraph">Because the main component of the linearly polarized, backscattered signal from [[hydrometeors]]  has the same [[polarization]] as the transmitted polarization, the linear depolarization ratio yields a  value less than unity or, equivalently, a negative [[decibel]] quantity. Note that relative to the [[receiver]]  channels of the radar the linear depolarization ratio is defined inversely to the [[circular depolarization ratio|circular depolarization  ratio]].</div><br/> </div>
 
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Latest revision as of 17:20, 25 April 2012



linear depolarization ratio

(Abbreviated LDR.) The ratio of the power received in the orthogonal, or cross-polarized, channel to that received in the transmission, or copolarized, channel of a dual- channel radar, when a linearly polarized signal is transmitted.

Because the main component of the linearly polarized, backscattered signal from hydrometeors has the same polarization as the transmitted polarization, the linear depolarization ratio yields a value less than unity or, equivalently, a negative decibel quantity. Note that relative to the receiver channels of the radar the linear depolarization ratio is defined inversely to the circular depolarization ratio.