==== Weather radar (GOP-2) ====
Weather radars measure the range resolved radar reflectivity factor (**Z**) in dBZ from which the surface rain rate (**RR**) is commonly derived using Z-RR relations of the form **Z=a·RR^b**. In addition Doppler radars provide the radial velocity (**v**) and sometimes also the spectral width (**σ**). Polarimetric radars can also observe the differential reflectivity (**ZDR**) and the linear depolarization ration (**LDR**).

For GOP operational radar products by the DWD network and original 3-D radar measurements will be made available. Research radars operated by universities, research centers and DWD will also be included. The PQP project VERIPREG (Paulat et al. 2005) will produce hourly precipitation maps from a combination of radar (composite of precipitation scans) and in situ rain gauge data. The PQP project QUEST will use the 3D radar reflectivities to evaluate the forecasted hydrometeor distributions via forward simulation by a polarimetric radar operator.

^ Name ^ Code ^ PI ^ Location ^ Temp. Reso. ^ Products ^ Data/Year ^ Availability ^ 
|Bonn X-band radar | [[div_rad|rad_xbbn]] | [[:participants|Simmer]] | [[:meteorological stations|Bonn]] | 5 min | Z, v | ∼200 GB | not yet | 
|DWD research radar | [[div_rad|rad_cbhp]] | [[:participants|Seltmann]] | [[:meteorological stations|Hohenpeissenberg]] | 15 min | Z, LDR, ZDR, v, KDP | ∼300 GB | not yet | 
|FZK C-band radar| [[div_rad|rad_cbka]] | [[:participants|Beheng]] | Karlsruhe | 5(Z),10(v) min |  Z, v  | ∼1 MB | not yet | 
| [[http://www.meteo.be/english/|RMI]] radar | rad_brmi | [[:participants|Delobbe]] | Wideumont, Belgium | 15 min | Z, v |  | [[status:gop2_rad_brmi|check]] |   
|DWD 3D radar data| [[rad_dwdn|rad_dwdn]] | [[:participants|Mammen]] | 16 radar sites | 15 min | Z, v, σ | ∼250 GB | [[status:gop2_rad_dwdn|check]] | 
|International composit (**PI**) | [[dwd_radar|rad_rapi]] | [[:participants|Hanisch]] | Central Europe | 15 min | Z | ∼1 MB |[[status:gop2_rad_rapi|check]]| 
|DWD national composite (**RY**) | [[dwd_radar|rad_rary]] | [[:participants|Hanisch]] | Germany | 5 min | RR | ∼30 MB |[[status:gop2_rad_rary|check]]| 
|Radar quality product (**QY**) | [[dwd_radar|rad_raqy]] | [[:participants|Hanisch]] | Germany | 5 min | quality flag | ∼3 MB |[[status:gop2_rad_raqy|check]]| 
|DWD product for latent heat nudging | [[dwd_radar|rad_ralh]] | [[:participants|Koziar]] | Germany | 5 min | RR | ∼10 MB |[[status:gop2_rad_ralh|check]]| 
|[[http://www.dwd.de/de/wir/Geschaeftsfelder/Hydrometeorologie/a_href_pages/RADOLAN/index1.htm|RADOLAN]] DWD product | [[dwd_radar|rad_rarw]] | [[:participants|Hanisch]] | Germany | 1 h | RR | ∼3 MB |[[status:gop2_rad_rarw|check]]| 



--- //[[crewell@meteo.uni-koeln.de|Susanne Crewell]] 2007/03/23 12:08//