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joyrad10 [2020/08/17 10:30] – created bpospichjoyrad10 [2022/01/20 21:35] (current) – [Principle] bpospich
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 ===== Principle ===== ===== Principle =====
  
-**JOYRAD-10** is a vertically pointing X-Band Doppler cloud radar MIRA-10 manufactured by [[https://metek.de/|METEK GmbH]]. It is installed at the Forschungszentrum Jülich as part of [[http://cpex-lab.de/cpex-lab/EN/Home/JOYCE-CF/JOYCE-CF_node.html|JOYCE]]. +**JOYRAD-10** is a vertically pointing X-Band Doppler cloud radar MIRA-10 manufactured by [[https://metek.de/|METEK GmbH]]. It is located at the Forschungszentrum Jülich as part of [[http://cpex-lab.de/cpex-lab/EN/Home/JOYCE-CF/JOYCE-CF_node.html|JOYCE]]. It has been installed as part of the Emmy-Noether research group [[https://geomet.uni-koeln.de/forschung/en-optimice|OPTIMICE]] led by Stefan Kneifel in order to perform triple-frequency radar observations in combination with Ka- and W-Band radars. 
  
  
 +===== Measurement modes =====
  
-===== JOYRAD-10 History ===== +  * Vertically pointing observations with integration times up to 1 seconds. 
-^  Period  ^  Place  ^  Project  ^+
  
-| 10/2018 - today | [[http://www.fz-juelich.de/|Research Center Jülich]], Germany | JOYCE | 
  
 +===== JOYCE-CF Standard Operation Procedures =====
  
-===== Measurement examples =====+  * Standard measurement mode is vertically pointing, 2 second integration time 
  
-{{wiki:examples:200704_jue_l2_radar.png?direct&400|JOYRAD-35_obs}} +===== Calibrations and data quality assurance procedures ===== 
-{{wiki:examples:20200704_joyrad35_wind_profile.png?direct&400|JOYRAD-35_wind}} \\ +  * Check with co-located disdrometer to find out reflectivity offsets 
-//Example time series of JOYRAD-35 observations (radar moments / horizontal wind)//+  * Consistency check with other cloud radars
  
-Current observations at [[http://gop.meteo.uni-koeln.de/~hatpro/dataBrowser/dataBrowser2.html?site=JOYCE&date=-1&UpperLeft=Joyrad35_Overview&UpperRight=Joyrad35_wind_ppi|quicklook archive]]+===== Data availability =====
  
 +Data for JOYRAD-10 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   ^ Remarks   ^ 
 +| Doppler spectra, Radar moments  | 2 seconds   | variable size (up to 1 GB/hour in case of thick clouds)  | //YYYYMMDD_HHMMSS.znc//  | NetCDF file  |
 +| Doppler spectra  | 2 seconds   | variable size (up to 300 MB/hour in case of thick clouds)  | //YYYYMMDD_HHMMSS.zspc//  | Binary file  |
  
-===== Measurement modes =====+  * **Dual-wavelength ratio** Ka/X-Band 
  
-  * Vertically pointing observations with integration times up to 1 seconds.  
-  * Full azimuth/elevation scanning capability for horizontal variability of clouds as well as 3D wind vectors in clouds 
  
-===== JOYCE-CF Standard Operation Procedures =====+===== Link to current observations =====
  
-  * Standard measurement mode is vertically pointing, 2 second integration time  
-  * Every 30 minutes one azimuth scan at 83° elevation angle with 6° azimuth resolution (duration ~2 minutes) for horizontal wind within clouds and the boundary layer (if sufficient insects are present) 
  
-===== Calibrations ===== +Data quicklooks can be found in the [[http://atmos.meteo.uni-koeln.de/~hatpro/dataBrowser/dataBrowser2.html?site=TRIPEX-pol&date=-1&UpperLeft=3radar_Ze&UpperRight=3radar_DWR|JOYCE quicklook archive]] 
-  * ???+and in the [[https://guest.metek.de/skripts/animate_hourly_mbx1_diff.html?nic=mbx1|METEK archive]]
  
-===== Data quality assurance procedures ===== 
-  * Check with co-located disdrometer to find out reflectivity offsets 
-  * Consistency check with other cloud radars 
  
-===== Available datasets =====+===== Measurement examples ===== 
 +{{:wiki:examples:20220119_mira10.png?600|}} {{:wiki:examples:20220119_mira10_vel.png?600|}}\\ 
 +//Example time series of JOYRAD-10 observations (one hour of reflectivity and Doppler velocity as a function of height)// 
 + 
 +===== JOYRAD-10 History ===== 
 +^  Period  ^  Place  ^  Project  ^ 
 +| 10/2018 - today | [[http://www.fz-juelich.de/|Research Center Jülich]], Germany | [[https://geomet.uni-koeln.de/forschung/en-optimice|OPTIMICE]] |
  
-The following data products are provided via Cloudnet with a temporal resolution of 30 seconds. If you would like to have additional data with better resolution or raw Doppler spectra {{ :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   ^  
-| Radar reflectivity factor   | 30 seconds    | 1 file per day (30-50 MB)     | //YYYYMMDD_juelich_categorize.nc//  |   | 
-| Doppler velocity   | 30 seconds    | 1 file per day (30-50 MB)     | //YYYYMMDD_juelich_categorize.nc//  |   | 
-| Spectral width   | 30 seconds    | 1 file per day (30-50 MB)     | //YYYYMMDD_juelich_categorize.nc//  |   | 
-| Linear depolarization ratio   | 30 seconds    | 1 file per day (30-50 MB)     | //YYYYMMDD_juelich_categorize.nc//  |   | 
-| Profiles of horizontal wind | 30 minutes | 1 file per day (30-50 MB)     | YYYYMMDD_joyrad35_wind_profile.nc |  |  
-| Doppler spectra  |    |   |   |  | 
  
-===== Composite products using data from JOYRAD-35===== 
  
  
-  * **Dual-wavelength ratio** Ka/X-Band and Ka/W-Band [[http://gop.meteo.uni-koeln.de/~Hatpro/dataBrowser/dataBrowser2.html?site=TRIPEX-pol&date=-1&UpperLeft=3radar_Ze&UpperRight=3radar_DWR|Link to Quicklooks]]   
-  * **Cloudnet target classification** uses Radar moments data from JOYRAD-35. Combined with microwave radiometer and ceilometer observation, clouds are characterized by their geometrical extent as well as their microphysical properties. Data are available via [[https://cloudnet.fmi.fi/|ACTRIS cloudnet website]]  
-{{wiki:examples:20200704_juelich_classification.png?direct&800|Cloudnet_target_classification}} \\ 
-//Example time series of Cloudnet target classification// 
  
  
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 ===== Specifications ===== ===== Specifications =====
 ^ Parameter  ^ Specification  ^ Remark  ^ ^ Parameter  ^ Specification  ^ Remark  ^
-| Frequency | 35.5 ± 0.15 GHz  | corresponds to wavelength of 8.5 mm | +| Frequency | 9.4 GHz  | corresponds to wavelength of 3.2 cm |
-| Peak power (max) | 25 kW  |  | +
-| Average power | ~ 24 W |  | +
-| Pulse width | 200 ns | adjustable (100, 200, or 400 ns)  | +
-| Pulse repetition frequency | 5 kHz | adjustable (5-10 kHz) | +
-| Minimum height | 150 m | full sensitivity above 400 m  | +
-| Measuring range | 15 km | adjustable (7.5-30 km)  | +
-| Range resolution | 30 m | adjustable (15, 30, or 60 m) | +
-| Antenna beam width | 0.6° | | +
-| Doppler velocity resolution | 0.025 m/s | depends on FFT length | +
-| Maximum unambiguous velocity | ±20 m/s |  | +
-| Maximum sensitivity at 5 km (integration 0.1 s) | -45 dBZ |  | +
-| Calibration system accuracy | ±0.5 dB |  | +
-| Number of gates (with simultaneous stored raw data) | 500 |  | +
-| Number of averaging spectra | 200 | adjustable (1-32768) |+
 | Manufacturer | [[http://www.metek.de/|Metek]] |  | Manufacturer | [[http://www.metek.de/|Metek]] | 
                                     |                                     |
joyrad10.1597653021.txt.gz · Last modified: 2020/08/17 10:30 by bpospich