==== DWD Radar Products ====

{{ :dwd_radar_pi_klein.png?250|:dwd_radar_pi_klein.png}}
== PI  international radar composite (rad_rapi) ==
  * international radar reflectivity (dBZ) composite 
  * covers central Europe (1440 km * 1440 km)
  * 6 reflectivity classes
  * temporal resolution: 15 min
  * spatial resolution: 4 km
\\



== RY  national radar composite (rad_rary) ==
{{ :domain_radar.png?250|:domain_radar.png}}
  * radar-derived precipitation analysis
  * only in the overlap area of different radars the QY quality information is used (to decide which radar's information is less flawed)
  * covers Germany (900 km * 900 km)
  * temporal resolution: 5 min
  * spatial resolution: 1 km


== QY (radar quality product rad_raqy) ==
  * radar //quality product// containing quality flags that indicate errors and quality problems identified in the quality check
  * covers Germany (900 km * 900 km)
  * temporal resolution: 5 min
  * spatial resolution: 1 km

==  LMK radar product (rad_ralh) ==
  * national quality-checked radar precipitation analysis on LMK grid for latent heat nudging (only summer)
  * combines **RY** with **QY** information, i.e. at gridpoints where QY indicates quality problems its value is set to "error"
  * temporal resolution: 5 min
  * spatial resolution: 2.8 km
  * filename convention: //lafyyyymmddhh//
  * each hourly file contains 12 5-min precipitation sum records

== RADOLAN (rad_rarw) ==
  * radar-derived precipitation analysis
  * online calibrated to ground observations to give 1-h precipitation sums
  * available (nearly) immediately
  * undefined in case of missing radar data, therefore not suitable as estimate for long-term precipitation sums
  * spatial resolution: 1 km