Difference between revisions of "Range normalization"

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<div class="definition"><div class="short_definition">In [[radar]] and [[lidar]], adjustment of the [[received power]] to compensate for the  [[divergence]] of [[radiant flux density]] with [[range]]. The [[received power]] is multiplied by (''r''/''r''<sub>0</sub>)<sup>2</sup>,  where ''r'' is the range and ''r''<sub>0</sub> is an arbitrary reference range (e.g., 1 km).</div><br/> <div class="paragraph">This normalization assumes that a [[distributed target]] fills the [[pulse volume]] at range ''r'' (<br/>''see''  [[beam filling]]) so that the size of the [[scattering]] volume increases with ''r''<sup>2</sup> even as the incident [[flux  density]] decreases with ''r''<sup>2</sup>. The normalization in effect corrects for the [[flux]] divergence on the return  trip from the scattering volume to the [[receiver]]. <br/>''See'' [[lidar equation]], [[radar equation]].</div><br/> </div>
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<div class="definition"><div class="short_definition">In [[radar]] and [[lidar]], adjustment of the [[received power]] to compensate for the  [[divergence]] of [[radiant flux density]] with [[range]]. The [[received power]] is multiplied by (''r''/''r''<sub>0</sub>)<sup>2</sup>,  where ''r'' is the range and ''r''<sub>0</sub> is an arbitrary reference range (e.g., 1 km).</div><br/> <div class="paragraph">This normalization assumes that a [[distributed target]] fills the [[pulse volume]] at range ''r'' (<br/>''see''  [[beam filling]]) so that the size of the [[scattering]] volume increases with ''r''<sup>2</sup> even as the incident [[flux density|flux  density]] decreases with ''r''<sup>2</sup>. The normalization in effect corrects for the [[flux]] divergence on the return  trip from the scattering volume to the [[receiver]]. <br/>''See'' [[lidar equation]], [[radar equation]].</div><br/> </div>
 
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Latest revision as of 17:45, 25 April 2012



range normalization

In radar and lidar, adjustment of the received power to compensate for the divergence of radiant flux density with range. The received power is multiplied by (r/r0)2, where r is the range and r0 is an arbitrary reference range (e.g., 1 km).

This normalization assumes that a distributed target fills the pulse volume at range r (
see beam filling) so that the size of the scattering volume increases with r2 even as the incident flux density decreases with r2. The normalization in effect corrects for the flux divergence on the return trip from the scattering volume to the receiver.
See lidar equation, radar equation.