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: https://ruisdael-observatory.nl/cesar/
Simple
- Date (Publication)
- 2021-01-08
- Edition
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1
- Citation identifier
- urn:xkdc:ds:nl.knmi::cesar_nubiscope_cldcov_la1_t10/v1.0/
- Purpose
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scientific atmospheric research
- Status
- On going
- Point of contact
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Organisation name Individual name Electronic mail address Role Koninklijk Nederlands Meteorologisch Instituut (KNMI)
Point of contact
- Maintenance and update frequency
- As needed
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DG Discovery Properties Vocabulary 1.0
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Clouds
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Cloud cover
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Infrared
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Pyrometer
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CESAR
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Cabauw
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- Keywords
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Open data
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Ruisdael
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Core dataset
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- Use limitation
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No use limitations
- Access constraints
- Other restrictions
- Other constraints
- Classification
- Unclassified
- Denominator
- 1
- Language
- English
- Character set
- UTF8
- Topic category
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- Climatology, meteorology, atmosphere
)
- Begin date
- 2008-05-01
- End date
- 2017-04-30
- Supplemental Information
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This dataset was orginally distributed via the CESAR Database System under the full dataset name: cesar_nubiscope_cldcov_la1_t10, v1.0
- Reference system identifier
- http://www.opengis.net/def/crs/EPSG/0/28992
- Distribution format
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Name Version NetCDF
3
- Distributor contact
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Organisation name Individual name Electronic mail address Role Koninklijk Nederlands Meteorologisch Instituut (KNMI)
Point of contact
- OnLine resource
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Protocol Linkage Name landingpage
https://dataplatform.knmi.nl/catalog/datasets/index.html?x-dataset=cesar_nubiscope_cldcov_la1_t10&x-dataset-version=v1.0 KNMI Data Platform
- Hierarchy level
- Dataset
- Statement
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Sky brightness temperatures measured in one scan are analysed with software of the manufacturer IMK (nubiscope.eu). 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 'correct_nubiscope.pro' before the data are published.
Metadata
- File identifier
- 5d31d1fc-c37f-4dad-8814-fafd51802e11 XML
- Metadata language
- English
- Character set
- UTF8
- Hierarchy level
- Dataset
- Date stamp
- 2025-05-02T09:29:27.164Z
- Metadata standard name
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ISO 19115
- Metadata standard version
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ISO 19115:2003 NL Kernset 1.3 KNMI 1.1
- Metadata author
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Organisation name Individual name Electronic mail address Role Koninklijk Nederlands Meteorologisch Instituut (KNMI)
Point of contact
- Other language
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Language Character encoding Dutch; Flemish English UTF8
Overviews
Spatial extent
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