Precipitation - radar/gauge 3 hour accumulations over the Netherlands

Gridded files of radar-derived 3 hour precipitation accumulations, corrected by rain gauge data. Radar data from 1500 m over the Netherlands and surrounding area measured are corrected by data from the 32 KNMI automatic rain gauges. Time interval is 1 hour. See data set radar_tar_corr_accum_03h/2.0 for an archive that goes back to 2010.

Service Level Agreement

This dataset is also available with a SLA (Service Level Agreement), which means that agreements can be made about extra services that KNMI offers. This includes increased availability and technical support. More information about a SLA for this data can be found on the Data Services product page.

Access dataset via API

The dataset can be downloaded via an API, more about this on the Developer Portal. Use the following API endpoint for access to this dataset: https://api.dataplatform.knmi.nl/open-data/v1/datasets/radar_corr_accum_03h/versions/1.0/files

Browse dataset

Browse through the files of this dataset. To retrieve a specific file, we recommend to use the API.

Data and Resources

Additional Info

Field Value
Dataset name radar_corr_accum_03h
Dataset version 1.0
Dataset edition 4
Dataset manager Hidde Leijnse
Maintainer KNMI Data Services
Publication timestamp 2014-12-01T09:04:20Z
Reference system identifier PROJ.4+proj=stere +lat_0=90 +lon_0=0 +lat_ts=60 +a=6378.14 +b=6356.75 +x_0=0 y_0=0
North bound latitude 55.97
East bound longitude 10.86
South bound latitude 48.9
West bound longitude 0.0
Dataset start time 2008-01-01
Dataset end time Unlimited
Update frequency continual
Status onGoing
Identifier urn:xkdc:ds:nl.knmi::radar_corr_accum_03h/1.0/
License https://creativecommons.org/publicdomain/zero/1.0/
Lineage statement Radar reflectivities are measured by both radars (De Bilt at 52.1017 N, 5.1783 E and Den Helder at 52.9533 N, 4.7900 E) in scans with elevation angles of 0.3, 1.1, 2.0, and 3.0 degrees. These scans are used to generate a single image per radar at 1500 m by linearly interpolating radar reflectivities in altitude. Radar reflectivities are then converted to rainfall intensities by using the Z=200R^1.6 formula, and these rainfall intensities are accumulated to 3-hour sums. A mean bias correction is then performed based on the available 3-hour rainfall accumulations from automatic rain gauges. These two resulting radar rainfall estimates from both radars are then combined to a single product by taking a weighted average. The weigths are a function of the distance of a given point to the radar.
Use limitation No use limitations
Last metadata update May 16, 2022, 10:12 (UTC)