{
  "Spase": {
    "xmlns:xsi": "http://www.w3.org/2001/XMLSchema-instance",
    "xmlns": "http://www.spase-group.org/data/schema",
    "xsi:schemaLocation": "http://www.spase-group.org/data/schema \r\nhttp://www.spase-group.org/data/schema/spase-2_2_2.xsd",
    "Version": "2.2.2",
    "Instrument": {
      "ResourceID": "spase://SMWG/Instrument/VenusExpress/ASPERA4/NPD",
      "ResourceHeader": {
        "ResourceName": "Venus Express ASPERA-4 Neutral Particle Detector",
        "ReleaseDate": "2012-06-13T00:00:00Z",
        "Description": "The Neutral Particle Detector (NPD) of the ASPERA-4 package\r\nflown on Venus Express provides measurements of the ENA differential flux over \r\nthe energy range 100 eV - 10 keV resolving H and O with a coarse 5 deg x 30 deg \r\nangular resolution. The sensor consists of two identical detectors each with a \r\n9 deg x 90 deg intrinsic field of view. The measurement technique is based on a \r\nprinciple similar to the Neutral Particle Imager. ENAs incident on a surface at \r\na grazing angle of 15 deg are reflected and cause secondary electron emission. \r\nThe secondary electrons are transported to an MCP assembly, which gives the START \r\nsignal.  The reflected ENAs hit the second surface and again produce the secondary \r\nelectrons used to generate the STOP signal. The time-of-flight (TOF) electronics \r\ngive the ENA velocity. The pulse-height distribution analysis of the STOP signals \r\nis used to provide a rough determination of the ENA mass.",
        "Contact": {
          "PersonID": "spase://SMWG/Person/Stas.Barabash",
          "Role": "PrincipalInvestigator"
        },
        "InformationURL": {
          "Name": "PSA ASPERA web page",
          "URL": "ftp://psa.esac.esa.int/pub/mirror/VENUS-EXPRESS/ASPERA4/VEX-V-SW-ASPERA-2-ELS-V1.0/CATALOG/INST.CAT"
        }
      },
      "InstrumentType": "NeutralAtomImager",
      "InvestigationName": "ASPERA4_NPD",
      "ObservatoryID": "spase://SMWG/Observatory/VenusExpress"
    }
  }
}