@prefix actris_vocab: <https://vocabulary.actris.nilu.no/actris_vocab/> .
@prefix skos: <http://www.w3.org/2004/02/skos/core#> .
@prefix dc: <http://purl.org/dc/terms/> .

actris_vocab:sunphotometer
  skos:exactMatch <https://codes.wmo.int/wmdr/:ObservingMethodAtmosphere/244>, <https://gcmd.earthdata.nasa.gov/kms/concept/4a210bf2-d6e5-459d-a555-d0d05155006b> ;
  skos:inScheme actris_vocab: ;
  skos:related actris_vocab:aerosolinsitu, actris_vocab:reactivetracegasesinsitu ;
  dc:contributor <https://orcid.org/0000-0003-2972-2851> ;
  a skos:Concept ;
  skos:prefLabel "sun photometer"@en ;
  skos:altLabel "Sun Photometer"@en ;
  skos:broader actris_vocab:photometer ;
  dc:creator <https://orcid.org/0000-0001-8911-7253> ;
  skos:definition "Photometer mounted on a tracking system to always point towards the sun to measure the direct sun radiance. Can be equipped with spectral filters to measure the direct sun radiance at targeted wavelengths. By calibration, the optical depth of the atmosphere can be inferred from the direct sun radiance. By using assumptions on the atmospheric temperature and pressure profile, or corresponding information from weather forecast models or radio sonde soundings, the optical depth due to aerosol particles in the atmosphere column can be calculated."@en .

actris_vocab:CimelCE318 skos:related actris_vocab:sunphotometer .
actris_vocab:aerosolinsitu
  skos:prefLabel "aerosol in situ"@en ;
  a skos:Concept .

actris_vocab:
  skos:prefLabel "ACTRIS Vocabulary"@en ;
  a skos:ConceptScheme .

actris_vocab:photometer
  skos:prefLabel "photometer"@en ;
  a skos:Concept ;
  skos:narrower actris_vocab:sunphotometer .

actris_vocab:reactivetracegasesinsitu
  skos:prefLabel "reactive trace gases in situ"@en ;
  a skos:Concept .