**__Rain gauge products__**

__REGNIE (rai_dwd5) precipitation analysis (by DWD):__

Quality-checked analysis of all (ca. 3000) DWD rain gauges (including climate network). Orographical influence is taken into account by a regression method. 24-h precipitation sums of 7:30 a.m. till 7:30 a.m. next day. Available not immediately due to time needed for data collection and quality check. Spatial resolution: 30" * 60".

__RANIE (rai_dwd3) precipitation gauge analysis (by DWD):__
 
Analysis of gauge precipitation observations. Some quality check is applied, e.g. an outlier test. Orographical influence is taken into account by a regression method. Available (nearly) immediately. 6-h precipitation sums (00, 06, 12, 18 UTC). Spatial resolution: 1 km.

**__Combined (radar and gauge) products__**

__RANIE (rai_dwd4) precipitation combined gauge and radar analysis (by DWD):__

Combined analysis of radar and gauge precipitation observations. Some quality check is applied, e.g. an outlier test. Orographical influence is taken into account by a regression method. Available (nearly) immediately. 6-h precipitation sums (00, 06, 12, 18 UTC). Spatial resolution: 1 km.

__RADOLAN (rad_rarw) radar precipitation analysis (by DWD):__

Radar-derived precipitation analysis, online calibrated to ground observations.
Available (nearly) immediately. 1-h precipitation sums. Undefined in case of missing radar data, therefore not suitable as estimate for long-term precipitation sums.  Spatial resolution: 1 km.

**__Radar products__**

__PI (rad_rapi) international radar composit (by DWD):__

International radar composit (in dBZ), covering central Europe (1440 km * 1440 km), temporal resolution: 15 min. Spatial resolution: 4 km.

__RY (rad_rary) national radar precipitation analysis (by DWD):__

Radar-derived precipitation analysis, covering Germany (900 km * 900 km), temporal resolution: 5 min. Spatial resolution: 1 km. Only in the overlap area of different radars the QY quality information is used (to decide which radar's information is less flawed).

__QY (rad_raqy) radar quality product (by DWD):__

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.

__(rad_ralh) National quality-checked radar precipitation analysis on LMK grid for latent heat nudging (by DWD):__

Radar-derived precipitation analysis, on LMK (2.8 km) grid, combining RY with QY information, i.e. at gridpoints where QY indicates quality problems its value is set to "error". Temporal resolution: 5 min. This product is used in LMK's latent heat nudging. Filename: lafyyyymmddhh, each hourly file contains 12 5-min precipitation sum records.

**__Domain for international composit (PI):__**

{{:dwd_radar_pi_klein.png|:dwd_radar_pi_klein.png}}

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**__Domain for national composit products (RADOLAN, RY, QY):__**

{{:domain_radar.png|:domain_radar.png}}

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**__Stations of the waterworks of Berlin, FU Berlin and DWD:__**

{{:berlin_gauges_small.png|:berlin_gauges_small.png}}

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**__Radar locations:__**

Range of DWD:\\ 
C-Band weather radar (black)\\ 
C-Band radar Karlsruhe of FZK (green)\\
X-Band radar Bonn (blue)\\
X-band radar MPI Hamburg  (blue)\\
polarimetric C-band radars of DWD Hohenpeissenberg and DLR (red).

{{:radarstandorte.png?300|radar locations }}


  --- //[[treinhar@meteo.uni-koeln.de|Thorsten Reinhardt]] 2006/12/20 15:22//