@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/822e908d-6d65-4c29-b13f-0ad794909fc2>
  ns0:altLabel [ ] ;
  skos:definition """The objective of the ASPOC (Active Spacecraft Potential Control) instrument on 
the Cluster-II spacecraft is to investigate this ion beam and its interaction
with the surrounding particles, connected with the reduction efficiency of the
spacecraft charge to acceptable levels.

This instrument is being developed by an international workgroup, which the
institute of space research of the Austrian academy of sciences chairs as
principle investigator. This institute is also responsible for the complete
digital electronics of the instrument. An important part is made up by the ion
emitters, which were developed by the Austrian research center Seibersdorf. The
liquid metal ion emitter that will be operated is especially suited for outer
space because of the low melting point of Indium. The electronics for the
current supply and high voltage generation is developed by Forsvarets
Forskningsinstitut (FFI) in Kjeller, Norway. The instrument casing, the lid and
shutter mechanism for the ion emitter module and test support are the
responsibility of the Space Science Department of ESA at ESTEC. The mass of the
instrument is 1.9 kg, the power usage up to 2.7 Watt.

See:
http://www.iwf.oeaw.ac.at/english/research/earthnearspace/cluster/aspoc_e.html


Group: Instrument_Details
   Entry_ID: ASPOC
   Group: Instrument_Identification
      Instrument_Category: Solar/Space Observing Instruments
      Instrument_Class: Particle Detectors
      Short_Name: ASPOC
      Long_Name: Active Spacecraft Potential Control Experiment
   End_Group
   Group: Associated_Platforms
      Short_Name: CLUSTER-II
   End_Group
   Online_Resource: http://www.iwf.oeaw.ac.at/english/research/earthnearspace/cluster/aspoc_e.html
   Group: Instrument_Logistics
      Data_Rate: 0.108 kbps
      Instrument_Start_Date: 2000-07-16
      Instrument_Owner: Space Research Institute, Austrian Academy of Sciences
      Instrument_Owner: Institute for Physics, Austrian Research Centers Seibersdorf
      Instrument_Owner: Space Science Department, ESA/ESTEC
      Instrument_Owner: Norwegian Defense Research Establishment
      Instrument_Owner: University of New Hampshire
      Instrument_Owner: Naval Postgraduate School
      Instrument_Owner: Southwest Research Institute
      Instrument_Owner: University of Washington
      Instrument_Owner: University College London
      Instrument_Owner: Chinese Academy of Sciences
   End_Group
End_Group"""@en ;
  skos:prefLabel "ASPOC"@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/822e908d-6d65-4c29-b13f-0ad794909fc2> .