Doppler lidar: Difference between revisions

Latest revision as of 16:49, 25 April 2012

Doppler lidar

A laser radar (lidar) that can determine radial velocity (velocity toward or away from the laser) of the air by measuring the frequency shift of the returning light that was scattered from atmospheric aerosols, compared to the original transmitted frequency.

Velocities of individual convective thermals and large-diameter turbulent eddies can be measured. Most lidar signals are blocked by clouds and fog, and are greatly attenuated in very polluted air.
See Doppler effect.

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-<div class="definition"><div class="short_definition">A [[laser radar]] ([[lidar]]) that can determine [[radial velocity]] ([[velocity]] toward or away  from the [[laser]]) of the air by measuring the [[frequency]] shift of the returning [[light]] that was [[scattered]]  from atmospheric [[aerosols]], compared to the original transmitted frequency.</div><br/> <div class="paragraph">Velocities of individual convective thermals and large-diameter turbulent [[eddies]] can be measured.  Most lidar signals are blocked by [[clouds]] and [[fog]], and are greatly attenuated in very polluted  air. <br/>''See '' [[Doppler effect]].</div><br/> </div>
+<div class="definition"><div class="short_definition">A [[laser  radar|laser radar]] ([[lidar]]) that can determine [[radial velocity]] ([[velocity]] toward or away  from the [[laser]]) of the air by measuring the [[frequency]] shift of the returning [[light]] that was [[scattered]]  from atmospheric [[aerosols]], compared to the original transmitted frequency.</div><br/> <div class="paragraph">Velocities of individual convective thermals and large-diameter turbulent [[eddies]] can be measured.  Most lidar signals are blocked by [[clouds]] and [[fog]], and are greatly attenuated in very polluted  air. <br/>''See '' [[Doppler effect]].</div><br/> </div>
 </div>