# Difference between revisions of "Range normalization"

From Glossary of Meteorology

imported>Perlwikibot (Created page with " {{TermHeader}} {{TermSearch}} <div class="termentry"> <div class="term"> == range normalization == </div> <div class="definition"><div class="short_definition">In [[ra...") |
imported>Perlwikibot |
||

Line 9: | Line 9: | ||

</div> | </div> | ||

− | <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> | + | <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> |

</div> | </div> | ||

## Latest revision as of 16:45, 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*/*r*_{0})^{2}, where*r*is the range and*r*_{0}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*r*^{2}even as the incident flux density decreases with*r*^{2}. 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.

Copyright 2022 American Meteorological Society (AMS). For permission to reuse any portion of this work, please contact permissions@ametsoc.org. Any use of material in this work that is determined to be “fair use” under Section 107 of the U.S. Copyright Act (17 U.S. Code § 107) or that satisfies the conditions specified in Section 108 of the U.S.Copyright Act (17 USC § 108) does not require AMS’s permission. Republication, systematic reproduction, posting in electronic form, such as on a website or in a searchable database, or other uses of this material, except as exempted by the above statement, require written permission or a license from AMS. Additional details are provided in the AMS Copyright Policy statement.