@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/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/47926401-5326-441b-be91-1e3c36e6eb6c> .

<https://gcmd.earthdata.nasa.gov/kms/concept/47926401-5326-441b-be91-1e3c36e6eb6c>
  ns0:resource [ ] ;
  ns0:altLabel [ ] ;
  skos:definition """The Digital Wave Processing Experiment (DWP) on the Cluster-II spacecraft, is 
a component of the Wave Experiment Consortium. The wide variety of 
geophysical plasmas that will be investigated by the Cluster mission contain 
waves with a frequency range from DC to over 100 kHz with both magnetic and 
electric components. The characteristic duration of these waves extends from a 
few milliseconds to minutes and a dynamic range of over 90 dB is desired. The 
DWP instrument employs a novel architecture based on the use of transputers 
with parallel processing and re-alloctable tasks to provide a high-reliability 
flexible system.

DWP is responsible for coordinating WEC operations at several levels. At the
lowest level, DWP provides electrical signals to synchronise instrument
sampling. At higher levels, DWP time tags data in a consistent manner and
provides a facility for constructing more complex WEC modes by means of macros.

The processing system within the DWP instrument will also perform particle
correlations in order to permit the study of wave/particle interactions.
Particle correlation is based on forming autocorrelation functions of the time
series of particle detector counts as a function of energy and pitch angle. The
basic operations are carried out in DWP resident software using algorithms
developed for AMPTE, CRRES, rocket experiments and also from computer
simulations.

The DWP particle correlator takes raw electron detection pulses from the PEACE
instrument and performs software auto-correlation functions (ACF) that are
sorted and summed according to instantaneous PEACE selected electron energy.

DWP was designed and built by the Space Systems Group of the University of 
Sheffield. 


Group: Instrument_Details
   Entry_ID: DWP
   Group: Instrument_Identification
      Instrument_Category: Solar/Space Observing Instruments
      Instrument_Class: Magnetic Field/Electric Field Instruments
      Short_Name: DWP
      Long_Name: Digital Wave Processing Experiment
   End_Group
   Group: Associated_Platforms
      Short_Name: CLUSTER-II
   End_Group
   Online_Resource: http://sci.esa.int/science-e/www/object/index.cfm?fobjectid=33024&fbodylongid=1109
   Online_Resource: http://nssdc.gsfc.nasa.gov/database/MasterCatalog?sc=2000-041B&ex=7
   Sample_Image: http://sci.esa.int/science-e-media/img/34/hires_36660.JPG
   Group: Instrument_Logistics
      Instrument_Start_Date: 2000-07-16
      Instrument_Owner: University of Sheffield, England
   End_Group
End_Group"""@en ;
  skos:prefLabel "DWP"@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 .