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

<https://gcmd.earthdata.nasa.gov/kms/concept/c093951b-4276-4795-824f-54064a8f5a0d>
  ns0:resource [ ] ;
  ns0:altLabel [ ] ;
  skos:definition """The objective of the CPI investigation on Geotail is to make comprehensive
observations of the three-dimensional velocity distribution functions of
electrons and positive ions, with identification of ion species. The instrument
contains three sets of quadrispherical analyzers with channel electron
multipliers. These three obtain three-dimensional measurements for hot plasma
and solar wind electrons, for solar wind ions, and for positive-ion composition
measurements. The positive-ion composition measurement includes five miniature
imaging mass spectrometers at the exit aperture of the analyzer, and covers
masses from 1 to 550 u/Q at 100 eV, and 1 to 55 u/Q at 10 keV. The hot plasma
analyzer measures electrons and ions in the range 1-50,000 eV/Q. The solar wind
analyzer measures ions from 150 to 7,000 eV/Q. Sequencing of the energy
analyzers and mass spectrometers, and other control functions, are provided by
two microprocessors.

Principal Investigator:
Prof. Louis A. Frank
Department of Physics and Astonomy
The University of Iowa
Van Allen Hall, Iowa cty, IA 52242-1479
Phone:  1-319-335-1695
Fax:    1-319-335-1753
e-mail: frank@iowasp.physics.uiowa.edu

See:
http://pwg.gsfc.nasa.gov/geotail_inst.shtml
and
http://www-pi.physics.uiowa.edu/www/cpi/


Group: Instrument_Details
   Entry_ID: CPI-G
   Group: Instrument_Identification
      Instrument_Category: Solar/Space Observing Instruments
      Instrument_Class: Particle Detectors
      Short_Name: CPI-G
      Long_Name: Comprehensive Plasma Investigation-Geotail
   End_Group
   Group: Associated_Platforms
      Short_Name: GEOTAIL
   End_Group
   Online_Resource: http://www-pi.physics.uiowa.edu/www/cpi/
   Online_Resource: http://pwg.gsfc.nasa.gov/geotail_inst.shtml#CPI
   Sample_Image: http://www-pi.physics.uiowa.edu/cpi/cpi_description/cpi_plate2.gif
   Group: Instrument_Logistics
      Data_Rate: 4.608 kbps
      Instrument_Start_Date: 1992-07-24
      Instrument_Owner: University of Iowa
   End_Group
End_Group"""@en ;
  skos:prefLabel "CPI-G"@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 .

<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/c093951b-4276-4795-824f-54064a8f5a0d> .