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You have to download the files from ftp.nationaleregenradar.nl. Contact the provider for username and password.
The filenames look like RAD_TFhhmm_subtype_yyyymmddhhmm.h5 and have the HDF5 file format.
Download data using OpenDAP
It is also possible to get the data via the OpenDAP portal of the projectdirectly download data from the OpenDAP server. This way it is not necessary to transfer and import files. Another advantage is that it is not necessary to download the whole extent of the grid, but a subextent can be selected (unfortunately at this moment not available at the OpenDAP server). This also decreases bandwidth and storage needs. On the other hand, when FEWS has been offline, no data are collected. But since historical data remain available, this does not have to be a problem.
Example files are provided in: Import-Natradar-opendap.zip These are additional to the config example below. Notice there is a relation between type of data (real-time, near-realtime and definitive), relative viewperiod of the import, and expirytime. The user can improve the periods based on own experience.
Config example
The attached zipfile shows a FEWS configuration example of importing and visualising all data.