@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/b5e4912d-3224-4d7b-924c-a697677775c6>
  skos:prefLabel "Ultraviolet Instruments"@en ;
  a skos:Concept ;
  skos:narrower <https://gcmd.earthdata.nasa.gov/kms/concept/33838b40-3574-42aa-a849-52125f1a7708> .

<https://gcmd.earthdata.nasa.gov/kms/concept/33838b40-3574-42aa-a849-52125f1a7708>
  ns0:altLabel [ ] ;
  skos:definition """The Spectral Irradiance Monitor is a newly designed spectrometer that will
provide the first long-duration solar spectral irradiance measurements in the
visible and near infrared (Vis/NIR). The wavelength coverage is primarily from
300 to 2000 nm, with an additional channel to cover the 200-300 nm ultraviolet
spectral region to overlap with the SOLSTICE, another instrument on-board the
SORCE satellite. Understanding the wavelength-dependent variability throughout
SIM's wavelength range is of primary importance for long-term climate change
studies on Earth. SIM is a single optical element Fýry prism spectrometer; only
one optical element is needed to focus and disperse the light onto a series of
detectors in the spectrometer's focal plane. In this focal plane, four
photodiode detectors and an electrical substitution radiometer (ESR) are used
to detect solar radiation. SIM contains two completely independent and
identical (mirror-image) spectrometers to provide redundancy and
self-calibration capability.


Group: Instrument_Details
   Entry_ID: SIM
   Group: Instrument_Identification
      Instrument_Category: Solar/Space Observing Instruments
      Instrument_Class: Ultraviolet Instruments
      Short_Name: SIM
      Long_Name: Spectral Irradiance Monitor
   End_Group
   Group: Associated_Platforms
      Short_Name: SORCE
   End_Group
   Group: Spectral_Frequency_Information
      Wavelength_Keyword: Visible
      Number_Channels: 1
      Spectral_Frequency_Coverage_Range: 300 - 2000 nm
   End_Group
   Group: Spectral_Frequency_Information
      Wavelength_Keyword: Near Infrared
      Number_Channels: 1
      Spectral_Frequency_Coverage_Range: 200 - 2000 nm
   End_Group
   Group: Spectral_Frequency_Information
      Wavelength_Keyword: Ultraviolet
      Number_Channels: 1
      Spectral_Frequency_Coverage_Range: 200 - 300 nm
   End_Group
   Online_Resource: http://lasp.colorado.edu/sorce/sim.html
   Creation_Date: 2007-01-05
   Group: Instrument_Logistics
      Data_Rate: 1001 bps
      Instrument_Start_Date: 2003-01-25
      Instrument_Owner: LASP-CU
   End_Group
End_Group"""@en ;
  skos:prefLabel "SIM"@en ;
  skos:inScheme <https://gcmd.earthdata.nasa.gov/kms/concepts/concept_scheme/instruments> ;
  skos:broader <https://gcmd.earthdata.nasa.gov/kms/concept/b5e4912d-3224-4d7b-924c-a697677775c6> ;
  a skos:Concept .