Meteo Observations at IGMK

User Tools

Site Tools

Trace: • pvm
pvm

Differences

This shows you the differences between two versions of the page.

Link to this comparison view

Both sides previous revisionPrevious revision
Next revision		Previous revision
pvm [2020/08/31 20:15] – [Measurement modes] bpospichpvm [2021/03/01 10:18] (current) – [Link to current observations] bpospich
Line 32: Line 32:
  
  
-===== JOYCE-CF Standard Operation Procedures ===== 
  
-The instrument performs several scanning patterns and uses the remaining time for vertical staring. 
- 
-Scan patterns are currently: 
- 
-  * Every 5 minutes doppler beam swinging (DBS) (12×14sec/hour=2min48sec/hour), i.e. one vertical and two tilted beams in eastern and western direction to derive instantaneous local wind profiles 
-  * Directly followed by a 3 beam VAD (VAD-3) (12×14sec/hour=2min48sec/hour), i.e. three tilted beams in at 0, 120 and 240 deg azimuth and 30deg zenith distance to derive instantaneous local wind profiles 
-  * Every 15 minutes a velocity azimuth display scan (VAD-36) (4×124sec/hour=8min16sec), i.e. a conical scan at 75oelevation to derive area averaged wind profiles 
-  * Every 60 minutes a range height indicator (RHI) (1×104sec/hour=1min44sec/hour), i.e. a vertical section from east to west with 5deg elevation steps (37beams) 
-  * The rest of the time is vertical staring, i.e. vertical staring is interrupted every 5 minutes and sums up to 47minutes/hour 
  
  
Line 50: Line 40:
 ===== Data availability ===== ===== Data availability =====
  
-Most of the following data products are provided via the SAMD database. If you would like to have additional data or recent data that have not been uploaded to SAMD yet, please fill the {{ :joyce_data_request_form.pdf |data request sheet}} and send it to [[mailto:info@joyce.cloud|info@joyce.cloud]]+Data are available on request, please fill the {{ :joyce_data_request_form.pdf |data request sheet}} and send it to [[mailto:info@joyce.cloud|info@joyce.cloud]]
  
    
 ^ Dataset     ^ Temporal resolution       ^ File size          ^ Filename   ^ Retrieval / Remarks   ^  ^ Dataset     ^ Temporal resolution       ^ File size          ^ Filename   ^ Retrieval / Remarks   ^ 
-| Vertical stare data (Backscatter, Doppler velocity)   | 2 seconds    | 1 file per day (180 MB)     | //sups_joy_dlidST00_l1_any_v00_YYYYMMDDHHMMSS.nc//  | available on SAMD   | +| PVM data   | 1 minute    | 1 file per day (15-20 MB)     | //detailsYYYYMMDD.txt.gz//  | contains data from both modules   |
-| 3D wind profiles from custom scanning   | 5 minutes    | 1 file per day (3.3 MB)     | //sups_joy_dlidCUST00_l2_wind_v00_YYYYMMDDHHMMSS.nc//  | available on SAMD   | +
-| 3D wind profiles from Doppler beam swinging  | 5 minutes    | 1 file per day (3 MB)     | //sups_joy_dlidDBS00_l2_wind_v00_YYYYMMDDHHMMSS.nc//  | available on SAMD   | +
-| Mixing layer height from vertical velocity   | 5 minutes    | 1 file per day (180 MB)     | //sups_joy_dlidST00_l2_zmlaw_v00_YYYYMMDDHHMMSS.nc//  | available on SAMD   | +
-| 3D wind profiles from VAD-36   | 15 minutes    | 1 file per day (1.6 MB)     | //wind_vad-36_YYYYMMDD.nc//  |    |+
  
  
Line 66: Line 52:
 ===== Link to current observations ===== ===== Link to current observations =====
  
-Current observations at [[http://gop.meteo.uni-koeln.de/~Hatpro/dataBrowser/dataBrowser4.html?site=JOYCE&date=-1&UpperLeft=Windlidar_Overview&UpperRight=Windlidar_mean_w&LowerRight=Windlidar_sigma_w&LowerLeft=Windlidar_vad_from_scan|quicklook archive]]+Current observations at [[http://atmos.meteo.uni-koeln.de/~hatpro/dataBrowser/dataBrowser4.html?site=JOYCE&date=0&UpperLeft=PVM__Polycrystalline&UpperRight=PVM__Amorph&LowerRight=PVM__Irradiance&LowerLeft=PVM__CumulativeEnergy|quicklook archive]]
  
  
Line 72: Line 58:
 ===== Measurement examples ===== ===== Measurement examples =====
  
-[[http://gop.meteo.uni-koeln.de/~jschween/wind_lidar/|Click here for more plots and explanations]] 
  
-Current VAD plot:\\ 
-{{http://gop.meteo.uni-koeln.de/~jschween/wind_lidar/vad.png?400}}\\ 
  
-//The figure shows a velocity azimuth display (VAD): vectors give direction and speed of horizontal wind at time and height. Vectors pointing upward indicate south wind, vectors pointing to the right indicate west wind. +{{wiki:examples:2020-08-17_polycrystalline.png?direct&400|Poly module}} 
-Color shading gives the backscatter coefficient. +{{wiki:examples:2020-08-17_irradiance.png?direct&400|Irradiance}} \\ 
-// +//Example time series of PVM observations (left: Quicklook for the polycristalline module, right: Irradiance and efficiency)// 
- +===== PVM History ===== 
-===== Doppler lidar History ===== +^  Period   ^  Installation angle  ^  Place  ^  Project  ^ Installed ^ 
-^  Period  ^  Place  ^  Project  ^ +| 5. October 2016 - 02.01.2017  | 30°, southward | Forschungszentrum Jülich | ET-CC | yes | 
-| 12.9.2012 -   today   | [[http://www.fz-juelich.de/|Research Center Jülich]], Germany | [[http://www.tr32.de|TR32]] | +| 03.01.2017 - 10.06.2020           | |  | | not installed (roof renovations) | 
-| 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]] | +| 10.06.2020 - today           | 30°, southward | Forschungszentrum Jülich |  | yes  |
-| 7.11.2011 - 26.7.2012 | [[http://www.fz-juelich.de/|Research Center Jülich]], Germany | [[http://www.tr32.de|TR32]] |+
  
 ===== Technical specifications ===== ===== Technical specifications =====
  
-^ Parameter  ^ Specification  ^ Remark  ^ +^ Parameter  ^ SolarWorld SW 235-poly  ^ First Solar - FS-380  ^ 
-| Wavelength / nm  | 1500nm  |  | +| STC power  | 235 Wp   | 80 Wp   | 
-| Pulse energy / $\mu$J  | ~100  | see [[http://www.arm.gov/publications/tech_reports/handbooks/dl_handbook.pdf|ARM Doppler lidar handbook]]  | +| Current   | 7.85 A   | 1.65 A   | 
-| Pulse width / ns (m)  | 150 (22.5)  | see ARM handbook  | +| Voltage   | 30.2 V   | 48.5 V   | 
-| Repetition Rates  / s  | 1/15000  | i.e. 15000 laser pulses per second (=Pulse repetition frequency PRF)  | +| Short circuit current  | 8.35 A  | 1.88 A   | 
-|                        | 1.67     | avg.beam i.e. N_avg pulses averaged and processed => dead time=0.67s  | +| Open circuit voltage  | 37 V   | 60.8 V   | 
-|                        | 300      | Doppler Beam swing (DBS) with 3 beams ([azi,ele] = [0,90],[0,75],[90,75])  | +| System voltage  | 1000 V  | 1000 V   | 
-|                        | 900      | Velocity azimuth display (VAD) with 36 beams ([azi,ele] = [i*10,75])  | +| Dimensions   | 1675 mm x 1001 mm x 31 mm  | 1200 mm x 600 mm x 7 mm    | 
-|                        | 3600     | vertical slice (RHI) with 18 beams ([azi,ele] = [109,i*10]) | +| Weight  | 21.2 kg  | 12 kg   |
-| N_avg  | 15000  | number of pulses to be averaged in one 'beam'  | +
-| resolution / m  | 30  | range resolution (adjustable from 15m onward)  | +
-| Field-of-View / deg  | 360 x 90  | free alingment of the beam  | +
-| maximum range / m | 9000  | adjustable, but restriced to sufficent backscatter (aerosol, cloud droplets or ice crystals)  | +
-| velocity resolution / ms<sup>-1</sup> | 0.0382  | adjustable  | +
-| velocity precsision / ms<sup>-1</sup>  | < 0.20  | for SNR > -17dB  | +
-| max velocity / ms<sup>-1</sup> | 19.2  | = Nyquist Velocity (adjustable)  | +
-| Aperture / mm  (area /m<sup>2</sup>)  | 75 (4.417e-3)  | see ARM handbook  | +
-| Size / cm³  | 80 x 53 x 40  |   | +
-| Average Power consumption / W  | 140/250 [600]  | (wo/w Heating/cooling) [The power supply shall provide 600W]  | +
-| 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   | +
- +
  
  
pvm.1598904906.txt.gz · Last modified: 2020/08/31 20:15 by bpospich