urn:x-wmo:md:de.dwd.cdc::obsgermany-climate-5min-rr

v24.3

In the now/ directory, the data is updated at a frequency of < 1 h. The data of the previous day is exchanged on a rolling basis until the last available measurement.

Quality control has not yet been completed for these data, so there may always be changes in the values.

In the directory recent/ the data files are updated daily. On a rolling basis, the data of the last 500 days - up to yesterday - are exchanged.

Quality control has not yet been completed for these data, so there may always be changes in the values.

In the directory historical/ the data files are updated annually.

Quality control has been completed for this data, so that the values for the version are constant.

During the annual version change, both corrections and historical additions are incorporated.

When using the "historical/", "recent/" and "now" directories together, the temporal overlap

and the different type of quality control must be taken into account.

Data sets with quality level QN=1 may contain significant errors. Users have to decide whether for their particular application the more error-prone 10-minute data should be used or rather higher quality data (hourly or daily values).

When investigating long-term changes or trends, consider the station-specific metadata provided in Metadaten_Parameter*, Metadaten_Geraete*, and Metadaten_Geographie*, which are provided for each station in the directory "meta_data/" as a zip file.

The meaning of the time stamp is instrument dependent. For the instrument rain[e]H3, the time stamp denotes the end of the measurement inverval. In case of instrument Pluvio Ott a time delay of approximately 5 minutes is introduced due to the inertia of the instrument response. This time shift is applicable for precipitation measurements from November 2008 onwards for DWD station measurements with instrument Pluvio Ott. Until Oktober 2008, the time delay for Pluvio Ott was variable, spanning from seconds (in case of heavy precipitation ) to 30 minutes (light precipitation) and cannot be stated in more detail. The 10min values are calculated from the 1min values with the respective time stamps. For instance, from November 2008 onward, the 10min value from Pluvio Ott with time stamp 11:50 UTC corresponds to the actual 10min intervall ending 11:45 UTC.

If precipitation indicator = 2 occurs along with precipitation depth > 0 mm, then this is a known error, which will currently not be corrected in the unaudited data.

The count value RS_Count is not output for the collective obsgermany-climate-5min-precipitation-historical, as the data of the different measuring devices, drop counter or electronic rain gauges with tilting scales, are output in the historical data files.

The stations in the DWD monitoring networks are set up and operated according to WMO regulations. Stations in the equivalent partner networks may deviate from WMO regulations.

Depending on the application, local, regional and influences changing with time should be considered, which can be location- and parameter specific. Sources of long-term uncertainty are (1) changes in station height when station was re-located, information on this is within the station's zip-files in Metadaten_Geographie*.

Uncertainties are also expected from (2) changes in instrumentation, see Metadaten_Geraete* and possibly also from (3) varying quality control procedures (Behrendt et al., 2011).

Further, uncertainties are known to come from (4) errors during data transfer or errors in the software, (5) change of observing personnel, and (6) others, see Freydank, 2014.

For the most recent data the quality control is not completed yet. There are still issues to be discovered in the historical data. We welcome any hints to improve the data basis (see contact).

These data are from the station networks of Deutschen Wetterdienst and legally as well as qualitatively equal partner networks. For details on the measurement procedures VuB 3 Beobachterhandbuch (DWD, 2014a), VuB 3 Technikerhandbuch (DWD, 2014b) and VuB 2 Wetterschlüsselhandbuch (DWD, 2013).

urn:x-wmo:md:de.dwd.cdc::obsgermany-climate-1min-rr

ISO 19115-2 Geographic information Metadata Part 2: Extensions for imagery and gridded data

ISO 19115-2:2009-02-15

urn:x-wmo:md:de.dwd.cdc::obsgermany-climate-5min-rr