@prefix skos: <http://www.w3.org/2004/02/skos/core#> .
@prefix sosa: <http://www.w3.org/ns/sosa/> .
@prefix rdfs: <http://www.w3.org/2000/01/rdf-schema#> .
@prefix mmd: <https://vocab.met.no/mmd/> .
@prefix isothes: <http://purl.org/iso25964/skos-thes#> .
@prefix dc: <http://purl.org/dc/terms/> .

<https://vocab.met.no/mmd/Platform/Sentinel-3B>
  skos:prefLabel "Sentinel-3B"@en ;
  a sosa:Platform, skos:Concept ;
  skos:narrower <https://vocab.met.no/mmd/Instrument/MWR> ;
  sosa:hosts <https://vocab.met.no/mmd/Instrument/MWR> .

sosa:isHostedBy rdfs:label "in platform"@en .
mmd:Instrument
  a isothes:ConceptGroup, skos:Collection ;
  skos:prefLabel "Instrument"@en ;
  skos:member <https://vocab.met.no/mmd/Instrument/MWR> .

<https://vocab.met.no/mmd/Platform/Sentinel-3A>
  skos:prefLabel "Sentinel-3A"@en ;
  a sosa:Platform, skos:Concept ;
  skos:narrower <https://vocab.met.no/mmd/Instrument/MWR> ;
  sosa:hosts <https://vocab.met.no/mmd/Instrument/MWR> .

<https://vocab.met.no/mmd/Instrument/MWR>
  sosa:isHostedBy <https://vocab.met.no/mmd/Platform/Sentinel-3B>, <https://vocab.met.no/mmd/Platform/Sentinel-3A> ;
  skos:exactMatch <https://gcmd.earthdata.nasa.gov/kms/concept/d81fc4e3-c0b4-4205-82b2-ef2161c169a3> ;
  dc:source <https://sentinel.esa.int/web/sentinel/technical-guides/sentinel-3-altimetry/instrument/mwr> ;
  skos:definition "The design and specifications of the SENTINEL-3 MWR have been based on those of the Envisat MWR. The instrument will measure brightness temperature at 23.8 GHz and 36.5 GHz covering a bandwidth of 200 MHz in each channel. The lower frequency channel is mostly sensitive to atmospheric water vapour and the higher frequency channel to cloud liquid water. Conceptually, it is a balanced Dicke radiometer for brightness temperatures below the Dicke load temperature. Balancing is achieved by means of a noise injection circuit. For brightness temperatures higher than the Dicke load temperature, a conventional Dicke mode is used. The radiometer employs a single offset reflector of 60 cm diameter and two separate feeds for the two channels. Calibration is achieved through a dedicated horn antenna pointing at the cold sky and the highly stable and precisely monitored internal Dicke load."@en ;
  rdfs:seeAlso <https://www.wmo-sat.info/oscar/instruments/view/mwr_sentinel_3>, <https://sentinel.esa.int/web/sentinel/technical-guides/sentinel-3-altimetry/instrument/mwr> ;
  skos:prefLabel "MWR"@en ;
  skos:altLabel "Micro-Wave Radiometer"@en ;
  a skos:Concept, sosa:Sensor .