@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/0d4fc3c1-8249-48eb-9a1f-abfce1240a8d>
  ns0:resource [ ] ;
  ns0:altLabel [ ] ;
  skos:definition """WHISPER (Waves of HIgh frequency and Sounder for Probing of Electron density by
Relaxation) is one of the five wave instruments present on board each of the
four CLUSTER spacecraft.

It measures, in the 2 - 80 kHz range, the electric field fluctuations issued
from distant or local sources.

By operating a relaxation sounder, an active radio technique, the frequency
position of the plasma resonance is identified, leading to the reliable
measurement of the absolute density of the total electron population.

See:
http://lpce.cnrs-orleans.fr/gb/gb_experim/i_exper.htm


Group: Instrument_Details
   Entry_ID: WHISPER
   Group: Instrument_Identification
      Instrument_Category: Solar/Space Observing Instruments
      Instrument_Class: Magnetic Field/Electric Field Instruments
      Short_Name: WHISPER
      Long_Name: Waves of High Frequency and Sounder for Probing Electron Density by Relaxation
   End_Group
   Group: Associated_Platforms
      Short_Name: CLUSTER-II
   End_Group
   Online_Resource: http://lpce.cnrs-orleans.fr/www_experim/experim_espace_whisper_fr.php
   Online_Resource: http://nssdc.gsfc.nasa.gov/database/MasterCatalog?sc=2000-041B&ex=11
   Online_Resource: http://sci.esa.int/science-e/www/object/index.cfm?fobjectid=33024&fbodylongid=1110
   Sample_Image: http://sci.esa.int/science-e-media/img/35/hires_36661.JPG
   Group: Instrument_Logistics
      Data_Rate: 0.98 kbps
      Instrument_Start_Date: 2000-07-16
      Instrument_Owner: Laboratoire de Physique et Chimie de l'Environnement, France
   End_Group
End_Group"""@en ;
  skos:prefLabel "WHISPER"@en ;
  skos:inScheme <https://gcmd.earthdata.nasa.gov/kms/concepts/concept_scheme/instruments> ;
  skos:broader <https://gcmd.earthdata.nasa.gov/kms/concept/bb175474-5e70-47be-8e1f-8dcd7563cc5b> ;
  a skos:Concept .

<https://gcmd.earthdata.nasa.gov/kms/concept/bb175474-5e70-47be-8e1f-8dcd7563cc5b>
  skos:prefLabel "Magnetic Field/Electric Field Instruments"@en ;
  a skos:Concept ;
  skos:narrower <https://gcmd.earthdata.nasa.gov/kms/concept/0d4fc3c1-8249-48eb-9a1f-abfce1240a8d> .