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instruments:wind_lidar [2014/11/17 11:31]
jan [Specifications]
instruments:wind_lidar [2019/04/23 15:50] (current)
jan [Specifications]
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-====== ​Wind Lidar ====== +====== ​Doppler ​Lidar ====== 
-//Mentor: [[http://​www.geomet.uni-koeln.de/​en/​general/​the-institute/staff/detailed-view/f7645b9eab9e9ee2111e298aff82f29f/?​tx_wtdirectory_pi1[show]=52&​tx_rggooglemap_pi1[poi]=52|J.H. Schween]]//+ 
 +//Mentor: [[http://​www.geomet.uni-koeln.de/​das-institut/mitarbeiter/schween/|J.H. Schween]]//
  
  
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 {{:​instruments:​p1040557.jpg?​direct&​255|}}\\ {{:​instruments:​p1040557.jpg?​direct&​255|}}\\
-[[http://​halo-photonics.com/​|Halo Photonics]] [[http://​halo-photonics.com/​Halo%20Photonics%20Stream%20Line%20LiDAR%20system.htm|streamline V4]] Instrument ​#17  +Instrument at [[http://​www.fz-juelich.de/​|Forschungszentrum Jülich]] on the roof of the IEK-8 ([[http://​www2.fz-juelich.de/​icg/​icg-2/​|Institut für Energie- und Klimaforschung:​ Troposphäre]]).
-at [[http://​www.fz-juelich.de/​|Forschungszentrum Jülich]] on the roof of the IEK-8 ([[http://​www2.fz-juelich.de/​icg/​icg-2/​|Institut für Energie- und Klimaforschung:​ Troposphäre]]).+
  
  
 ===== Data ===== ===== Data =====
  
-  * If you are interested in receiving data please contact the instrument mentor [[http://​www.geomet.uni-koeln.de/​en/general/​the-institute/​staff/detailed-view/f7645b9eab9e9ee2111e298aff82f29f/?​tx_wtdirectory_pi1[show]=52&​tx_rggooglemap_pi1[poi]=52 ​| J.H. Schween]].+  * If you are interested in receiving data please contact the instrument mentor [[http://​www.geomet.uni-koeln.de/​en/​the-institute/​rg-crewell/staff-crewell/schween/ | J.H. Schween]].
  
   * Recent plots can be found in the [[http://​gop.meteo.uni-koeln.de/​~hatpro/​dataBrowser/​dataBrowser1.html?​site=JOYCE&​date=-1&​UpperLeft=Windlidar_Overview|Quicklook archive]]   * Recent plots can be found in the [[http://​gop.meteo.uni-koeln.de/​~hatpro/​dataBrowser/​dataBrowser1.html?​site=JOYCE&​date=-1&​UpperLeft=Windlidar_Overview|Quicklook archive]]
  
 Current VAD plot:\\ Current VAD plot:\\
-[[http://​gop.meteo.uni-koeln.de/​~jschween/​wind_lidar/​|{{http://​gop.meteo.uni-koeln.de/​~jschween/​wind_lidar/​vad.png?​400}}]]\\ +[[http://​gop.meteo.uni-koeln.de/​~jschween/​wind_lidar/​|{{http://​gop.meteo.uni-koeln.de/​~jschween/​wind_lidar/​vad.png?​400|click for more plots}}]]\\ 
-Click on figure for further plots.+
  
 The figure shows a velocity azimuth display (VAD): vectors give direction and speed of horizontal wind at time and height. The figure shows a velocity azimuth display (VAD): vectors give direction and speed of horizontal wind at time and height.
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 ^  Period ​ ^  Place  ^  Project ​ ^ ^  Period ​ ^  Place  ^  Project ​ ^
 | 12.9.2012 -   ​today ​  | [[http://​www.fz-juelich.de/​|Research Center Jülich]], Germany | [[http://​www.tr32.de|TR32]] | | 12.9.2012 -   ​today ​  | [[http://​www.fz-juelich.de/​|Research Center Jülich]], Germany | [[http://​www.tr32.de|TR32]] |
-| 26.7.2012 - 31.8.2012 | [[https://​maps.google.de/​maps?​q=50.91275522340144N+6.30132085102542E|Engelsdorf]],​ Germany | [[http://​www.tr32.de|TR32]]-[[internal:​experiments:​patvap:Patvap]] | +| 26.7.2012 - 31.8.2012 | [[https://​maps.google.de/​maps?​q=50.91275522340144N+6.30132085102542E|Engelsdorf]],​ Germany | [[http://​www.tr32.de|TR32]]-[[internal:​experiments:​patvap]] | 
-| 7.11.2009 - 26.7.2012 | [[http://​www.fz-juelich.de/​|Research Center Jülich]], Germany | [[http://​www.tr32.de|TR32]] |+| 7.11.2011 - 26.7.2012 | [[http://​www.fz-juelich.de/​|Research Center Jülich]], Germany | [[http://​www.tr32.de|TR32]] |
  
  
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 ^ Parameter ​ ^ Specification ​ ^ Remark ​ ^ ^ Parameter ​ ^ Specification ​ ^ Remark ​ ^
 | Wavelength / nm  | 1500nm ​ |  | | Wavelength / nm  | 1500nm ​ |  |
-| Repetition ​Rate / s  | 1/15000, 1, 300, 900,  | laser pulsesavg.beam ​Doppler Beam swing (DBS), Velocity azimuth display (VAD)  |+| Pulse energy / $\mu$J ​ | ~100  | see [[http://​www.arm.gov/​publications/​tech_reports/​handbooks/​dl_handbook.pdf|ARM Doppler lidar handbook]] ​ | 
 +| Pulse width / ns (m)  | 150 (22.5) ​ | see ARM handbook ​ | 
 +| Repetition ​Rates  ​/ s  | 1/​15000 ​ | i.e. 15000 laser pulses ​per second (=Pulse repetition frequency PRF)  | 
 +|                        | 1.67     ​| ​avg.beam ​i.e. N_avg pulses averaged and processed => dead time=0.67s ​ 
 +|                        | 300      | Doppler Beam swing (DBS) with 3 beams ([azi,ele] = [0,​90],​[0,​75],​[90,​75]) ​ | 
 +|                        | 900      | Velocity azimuth display (VAD) with 36 beams ([azi,ele] = [i*10,​75]) ​ | 
 +|                        | 3600     | vertical slice (RHI) with 18 beams ([azi,ele] = [109,i*10]) | 
 +| N_avg  | 15000  | number of pulses to be averaged in one '​beam' ​ |
 | resolution / m  | 30  | range resolution (adjustable from 15m onward) ​ | | resolution / m  | 30  | range resolution (adjustable from 15m onward) ​ |
 | Field-of-View / deg  | 360 x 90  | free alingment of the beam  | | Field-of-View / deg  | 360 x 90  | free alingment of the beam  |
-| maximum range / m | 9000  | adjustable ​ | +| maximum range / m | 9000  | adjustable, but restriced to sufficent backscatter (aerosol, cloud droplets or ice crystals) ​ | 
-| velocity resolution / m/s | 0.0382 ​ | adjustable ​ | +| velocity resolution / ms$^{-1}$ ​| 0.0382 ​ | adjustable ​ | 
-| max velocity / m/s | 19  | adjustable ​ | +| velocity precsision / ms$^{-1}$ ​ | < 0.20  | for SNR > -17dB  | 
-| Size / cm³  | ~ 150 60 70  ​| ​estimated ​  |+| max velocity / ms$^{-1}$ ​| 19.2  ​| ​= Nyquist Velocity (adjustable)  | 
 +| Aperture / mm  (area /​m$^2$) ​ | 75 (4.417e-3) ​ | see ARM handbook ​ | 
 +| Size / cm³  | 80 53 40  ​| ​  |
 | Average Power consumption / W  | 140/250 [600]  | (wo/w Heating/​cooling) [The power supply shall provide 600W]  | | Average Power consumption / W  | 140/250 [600]  | (wo/w Heating/​cooling) [The power supply shall provide 600W]  |
 | Weight / kg   | 110  | with transport case  | | Weight / kg   | 110  | with transport case  |
 +| Manufacturer ​ | | [[http://​halo-photonics.com/​|Halo Photonics]] ​  |
 +| Year          | 2011 | |
 +| Instrument ​ | | [[http://​halo-photonics.com/​Halo%20Photonics%20Stream%20Line%20LiDAR%20system.htm|streamline ]] Instrument #17, XR version in 2010, 15kHz PRF, 10km max range   |
  
-Current setup: 
-  * doppler beam swing (DBS) with 3 beams ([azi,ele] = [0,​90],​[0,​75],​[90,​75]) every 5 minutes ​ 
-  * velocity azimuth display scan (VAD) ([azi,ele]i = [i*10,75]) every 15minutes 
-  * vertical staring during rest of time (dt=1.67sec) 
  
  
  
instruments/wind_lidar.1416220270.txt.gz · Last modified: 2016/04/07 19:53 (external edit)