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

<https://gcmd.earthdata.nasa.gov/kms/concept/8143e95e-a438-4a2a-82b2-6d7ae079fba7>
  skos:prefLabel "Photon/Optical Detectors"@en ;
  a skos:Concept ;
  skos:narrower <https://gcmd.earthdata.nasa.gov/kms/concept/89caeef2-3ad1-4932-a3be-1a075c04afcf> .

<https://gcmd.earthdata.nasa.gov/kms/concept/89caeef2-3ad1-4932-a3be-1a075c04afcf>
  skos:changeNote """2023-07-19 14:37:32.0 [tstevens]  
insert Definition (id: null
text: The InfraSnow Sensor was developed in close collaboration with the Swiss Federal Institute for Snow and Avalanche Research (SLF) in Davos. This is the first hand-held device that can measure snow specific-surface-area (SSA) at fractional cost of existing bulky laboratory devices. The method consists of diffuse near-infrared reflectance measurements using a compact integrating sphere setup to derive SSA. Diffuse reflectance is measured at NIR wavelengths, where impurities have only a weak influence on the reflectance of snow. For a sufficiently thick snow block, there exists a unique correlation between diffuse hemispherical reflectance and SSA according to multiple-scattering radiative transfer theory.
language code: en); 
""", """2023-07-19 14:35:17.0 [tstevens] Insert Concept 
add broader relation (InfraSnow [89caeef2-3ad1-4932-a3be-1a075c04afcf,1380225] - Photon/Optical Detectors [8143e95e-a438-4a2a-82b2-6d7ae079fba7,1371833]); 
""", """2023-07-19 14:36:00.0 [tstevens]  
insert AltLabel (id: null
category: primary
text: InfraSnow SSA Sensor
language code: en); 
""" ;
  skos:prefLabel "InfraSnow"@en ;
  ns0:altLabel [ ] ;
  skos:definition "The InfraSnow Sensor was developed in close collaboration with the Swiss Federal Institute for Snow and Avalanche Research (SLF) in Davos. This is the first hand-held device that can measure snow specific-surface-area (SSA) at fractional cost of existing bulky laboratory devices. The method consists of diffuse near-infrared reflectance measurements using a compact integrating sphere setup to derive SSA. Diffuse reflectance is measured at NIR wavelengths, where impurities have only a weak influence on the reflectance of snow. For a sufficiently thick snow block, there exists a unique correlation between diffuse hemispherical reflectance and SSA according to multiple-scattering radiative transfer theory."@en ;
  skos:broader <https://gcmd.earthdata.nasa.gov/kms/concept/8143e95e-a438-4a2a-82b2-6d7ae079fba7> ;
  ns0:reference [ ] ;
  skos:inScheme <https://gcmd.earthdata.nasa.gov/kms/concepts/concept_scheme/instruments> ;
  a skos:Concept .