@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/5f5e4f2c-61b7-4694-8680-3fc5799f6171>
  skos:prefLabel "Particle Detectors"@en ;
  a skos:Concept ;
  skos:narrower <https://gcmd.earthdata.nasa.gov/kms/concept/1ba9aee0-57c5-482b-b3e6-03d9506642fe> .

<https://gcmd.earthdata.nasa.gov/kms/concept/1ba9aee0-57c5-482b-b3e6-03d9506642fe>
  ns0:resource [ ] ;
  ns0:altLabel [ ] ;
  skos:definition """[Image and Text Source: NASA POES Project home page, http://goespoes.gsfc.nasa.gov/poes/instruments/sem.html ]

The SEM/2 provides measurements to determine the intensity of the Earth’s radiation belts and the flux of charged particles at the satellite altitude. It provides knowledge of solar terrestrial phenomena and also provides warnings of solar wind occurrences that may impair long-range communications, high-altitude operations, damage to satellite circuits and solar panels, or cause changes in drag and magnetic torque on satellites.

The SEM/2 consists of two separate sensor units and a common Data Processing Unit (DPU). The sensor units are the Total Energy Detector (TED) and the Medium Energy Proton and Electron Detector (MEPED).

The DPU serves as the interface between the sensors and the spacecraft. The TED senses and quantifies the intensity in the sequentially selected energy bands. The particles of interest have energies ranging from 0.05 keV to 20 keV. The MEPED senses protons, electrons, and ions with energies from 30 keV to levels exceeding 6.9 MeV.


Group: Instrument_Details
   Entry_ID: SEM-2
   Group: Instrument_Identification
      Instrument_Category: Solar/Space Observing Instruments
      Instrument_Class: Particle Detectors
      Short_Name: SEM-2
      Long_Name: Space Environment Monitor-2
   End_Group
   Group: Instrument_Associated_Sensors
      Short_Name: TED
      Short_Name: MEPED
   End_Group
   Group: Associated_Platforms
      Short_Name: NOAA-19
      Short_Name: NOAA-18
   End_Group
   Online_Resource: http://goespoes.gsfc.nasa.gov/poes/instruments/sem.html
   Online_Resource: http://www.ncdc.noaa.gov/oa/pod-guide/ncdc/docs/klm/html/c3/sec3-5.htm
   Sample_Image: http://goespoes.gsfc.nasa.gov/poes/instruments/images/enlarged_sem.jpg
   Creation_Date: 2009-02-04
   Group: Instrument_Logistics
      Instrument_Owner: USA/NASA
      Instrument_Owner: USA/NOAA
   End_Group
End_Group"""@en ;
  skos:prefLabel "SEM-2"@en ;
  skos:inScheme <https://gcmd.earthdata.nasa.gov/kms/concepts/concept_scheme/instruments> ;
  skos:broader <https://gcmd.earthdata.nasa.gov/kms/concept/5f5e4f2c-61b7-4694-8680-3fc5799f6171> ;
  a skos:Concept .