Clouds - cloud cover retrieved from infrared measurements at 10 minute intervals at CESAR observatory

Four cloud cover parameters are retrieved continuously from sky temperature measurements by a scanning infrared radiometer (NubiScope). These parameters are resp. total, low -, middle - and high level cloud cover. Only measurements 20 degrees above horizon are used to create a hemispherical cloud mask. The temperature deviation of a sky pixel from an estimated background sky temperature determines whether a pixel is considered to be cloudy or clear sky. For more information about CESAR:

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Data and Resources

Additional Info

Field Value
Dataset name cesar_nubiscope_cldcov_la1_t10
Dataset version v1.0
Dataset edition 1
Dataset manager KNMI Data Services
Maintainer KNMI Data Services
Publication timestamp 2021-01-08T12:00:00Z
Reference system identifier EPSG28992
North bound latitude 51.97
East bound longitude 4.93
South bound latitude 51.97
West bound longitude 4.93
Dataset start time 2008-05-01
Dataset end time 2017-04-30
Update frequency asNeeded
Status onGoing
Identifier urn:xkdc:ds:nl.knmi::cesar_nubiscope_cldcov_la1_t10/v1.0/
Lineage statement Sky brightness temperatures measured in one scan are analysed with software of the manufacturer IMK ( These programmes are 'scope.exe' for realtime and 'oncemore.exe' for postprocessing. Details of the processing are proprietary and not available. Data are postprocessed with IDL routine '' before the data are published.
Purpose scientific atmospheric research
Supplemental information This dataset was orginally distributed via the CESAR Database System under the full dataset name: cesar_nubiscope_cldcov_la1_t10, v1.0
Use limitation No use limitations
Last metadata update March 28, 2022, 12:43 (UTC)