@prefix skos: <http://www.w3.org/2004/02/skos/core#> .
@prefix ns0: <http://gcmd.gsfc.nasa.gov/kms#> .

<https://gcmd.earthdata.nasa.gov/kms/concept/72227178-bb4c-4ff5-98a3-f976aa3f3714>
  skos:prefLabel "Photon/Optical Detectors"@en ;
  a skos:Concept ;
  skos:narrower <https://gcmd.earthdata.nasa.gov/kms/concept/6cd74e61-e205-49bb-9ebb-78b06db5f531> .

<https://gcmd.earthdata.nasa.gov/kms/concept/6cd74e61-e205-49bb-9ebb-78b06db5f531>
  ns0:altLabel [ ] ;
  skos:definition """The whole-sky imager (WSI) is an automated imager used for assessing and documenting cloud fields and cloud field dynamics. The WSI is a ground-based electronic imaging system that monitors the upper hemisphere. It is a passive, i.e., non-emissive, system that acquires images of the sky dome through three spectral filters (neutral, red, and blue). From these sky images, we can assess the presence, distribution, shape, and radiance of clouds over the entire sky using automated cloud decision algorithms and related processing. The current WSI model (EO System 6) is capable of image acquisition under daylight, moonlight, and starlight conditions.

Information obtained from http://www.arm.gov/


Group: Instrument_Details
   Entry_ID: WSI
   Group: Instrument_Identification
      Instrument_Category: Earth Remote Sensing Instruments
      Instrument_Class: Passive Remote Sensing
      Instrument_Type: Photon/Optical Detectors
      Short_Name: WSI
      Long_Name: Whole-Sky Imager
   End_Group
   Online_Resource: http://www.arm.gov/instruments/instrument_iop.php?id=wsi
   Creation_Date: 2008-07-17
   Group: Instrument_Logistics
      Instrument_Owner: Atmospheric Radiation Measurement (ARM) Program, US Dept of Energy
   End_Group
End_Group"""@en ;
  skos:prefLabel "WSI"@en ;
  skos:inScheme <https://gcmd.earthdata.nasa.gov/kms/concepts/concept_scheme/instruments> ;
  skos:broader <https://gcmd.earthdata.nasa.gov/kms/concept/72227178-bb4c-4ff5-98a3-f976aa3f3714> ;
  a skos:Concept .