Abstract

Gridded files of radar-derived 24 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 KNMI's 325 manual rain gauges. Time interval is 1 day, from 8 to 8 UTC. KNMI has detected measurement anomalies caused by a defect in some rain gauges for manual precipitation observation. It concerns data from the second half of 2012 until present. At this moment KNMI is assessing the extent of the problem and investigates the options to repair the defect as soon as possible.


Metadata

Dataset name radar_corr_accum_24h
Dataset version 1.0
Status onGoing
Last metadata update October 21, 2024, 11:41 (UTC)
Update frequency daily
License https://creativecommons.org/licenses/by/4.0/
North bound latitude 55.97
East bound longitude 10.86
South bound latitude 48.9
West bound longitude 0.0
Dataset edition 5
Dataset manager Hidde Leijnse
Maintainer KNMI Data Services
Publication timestamp 2014-12-01T09:16:16Z
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
Dataset start time 2008-01-01
Dataset end time Unlimited
Identifier urn:xkdc:ds:nl.knmi::radar_corr_accum_24h/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 24 hour sums, from 8 to 8 UTC. The entire rainfall product is then corrected using the KNMI network of manual gauges.
Use limitation No use limitations
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