<?xml version="1.0" encoding="UTF-8"?>
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  <Version>2.2.6</Version>
  <Instrument>
    <ResourceID>spase://CDPP/Instrument/AMDA/THEMIS/D/ESA</ResourceID>
    <ResourceHeader>
      <ResourceName>ESA</ResourceName>

      <ReleaseDate>2009-05-20T21:10:04Z</ReleaseDate>
      <Description>The THEMIS Electrostatic Analyzers (ESAs) measure the flux of thermal particles in a 360° field of view over the energy range from ~3 eV to 30 keV. There are two ESAs on each THEMIS spacecraft, one measures ions, the other electrons. The ESA measures the full 3-D distributions, as well as the density, velocity, and temperature of the ambient electrons and ions.</Description>
      <Acknowledgement> NASA contract NAS5-02099 and V. Angelopoulos for use of data from the THEMIS Mission. Specifically: C. W. Carlson and J. P. McFadden for use of ESA data. </Acknowledgement>
      <Contact>
        <!--Vassilis Angelopoulos -->
        <PersonID>spase://SMWG/Person/Vassilis.Angelopoulos</PersonID>
        <Role>PrincipalInvestigator</Role>
      </Contact>
      <Contact>
        <!--Charles Carlson -->
        <PersonID>spase://SMWG/Person/Charles.W.Carlson</PersonID>
        <Role>CoInvestigator</Role>
      </Contact>
      <Contact>
        <!--James Mcfadden -->
        <PersonID>spase://SMWG/Person/James.P.McFadden</PersonID>
        <Role>CoInvestigator</Role>
      </Contact>
      <InformationURL>
        <Name>THEMIS-A Electrostatic Analyzers</Name>
        <URL>http://nssdc.gsfc.nasa.gov/nmc/experimentDisplay.do?id=2007-004A-02</URL>
        <Description>Instrument description from NSSDC database</Description>
      </InformationURL>
      <PriorID>spase://SMWG/Instrument/THEMIS-D/ESA</PriorID>
    </ResourceHeader>
    <InstrumentType>ElectrostaticAnalyser</InstrumentType>
    <InvestigationName>Dual Full Distribution Electrostatic Analyzers</InvestigationName>
    <ObservatoryID>spase://CDPP/Observatory/AMDA/THEMIS/D</ObservatoryID>
    <Caveats/>
  </Instrument>
</Spase>