Maximum unambiguous velocity: Difference between revisions
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<div class="definition"><div class="short_definition">The maximum range of [[radial velocity]] that can be observed without ambiguity by a [[Doppler radar]], [[sodar]], or [[lidar]].</div><br/> <div class="paragraph">Velocities outside this interval are folded into the interval. For a [[pulsed radar]] or sodar operating with an [[interpulse period]] ''T,'' or a lidar with an [[A/D converter]] sampling interval ''T,'' the [[unambiguous velocity interval]] is | <div class="definition"><div class="short_definition">The maximum range of [[radial velocity]] that can be observed without ambiguity by a [[Doppler radar]], [[sodar]], or [[lidar]].</div><br/> <div class="paragraph">Velocities outside this interval are folded into the interval. For a [[pulsed radar]] or sodar operating with an [[interpulse period]] ''T,'' or a lidar with an [[A/D converter]] sampling interval ''T,'' the [[unambiguous velocity interval]] is -λ/4''T'' to +λ/4''T'', where λ is the operating [[wavelength]]. This interval can be extended by the use of dual [[PRF]] and other techniques. <br/>''See'' [[velocity aliasing]], [[Nyquist frequency]].</div><br/> </div> | ||
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Revision as of 14:38, 20 February 2012
maximum unambiguous velocity
The maximum range of radial velocity that can be observed without ambiguity by a Doppler radar, sodar, or lidar.
Velocities outside this interval are folded into the interval. For a pulsed radar or sodar operating with an interpulse period T, or a lidar with an A/D converter sampling interval T, the unambiguous velocity interval is -λ/4T to +λ/4T, where λ is the operating wavelength. This interval can be extended by the use of dual PRF and other techniques.
See velocity aliasing, Nyquist frequency.
See velocity aliasing, Nyquist frequency.
