{
  "Spase": {
    "xmlns": "http://www.spase-group.org/data/schema",
    "xmlns:xsi": "http://www.w3.org/2001/XMLSchema-instance",
    "xsi:schemaLocation": "https://www.spase-group.org/data/schema https://www.spase-group.org/data/schema/spase-2.7.1.xsd",
    "Version": "2.7.1",
    "MetadataRightsList": {
      "Rights": {
        "SchemeURI": "https://spdx.org/licenses/",
        "RightsIdentifierScheme": "SPDX",
        "RightsIdentifier": "CC0-1.0",
        "RightsURI": "https://spdx.org/licenses/CC0-1.0.html",
        "RightsName": "Creative Commons Zero v1.0 Universal",
        "Note": "CC0 1.0 Universal is the Creative Commons license applicable to all publicly available SPASE metadata descriptions"
      }
    },
    "NumericalData": {
      "ResourceID": "spase://NASA/NumericalData/Voyager1/Plasma/PT12S",
      "NamingAuthority": "NASA",
      "ResourceType": "NumericalData",
      "ResourceHeader": {
        "ResourceName": "Voyager 1 High Resolution Plasma Data",
        "ReleaseDate": "2025-12-04T13:32:30Z",
        "RevisionHistory": {
          "RevisionEvent": [
            {
              "ReleaseDate": "2020-07-07T21:15:55Z",
              "Note": "Only known prior ReleaseDate of the metadata"
            },
            {
              "ReleaseDate": "2025-11-14T16:03:03Z",
              "Note": "Added PublicationInfo. Added ResourceType and NamingAuthority. Changed http to https in top-level schemaLocation attribute. Fixed version number separator in top-level schemaLocation attribute. Matched version number in schemaLocation attribute to updated value in Version tag. ZCB"
            },
            {
              "ReleaseDate": "2025-12-04T13:32:30Z",
              "Note": "Added MetadataRightsList and RightsList(s). Updated to 2.7.1. ZCB"
            }
          ]
        },
        "Description": "The plasma investigation made use of two Faraday-cup detectors, one pointed along the earth-spacecraft line and one at right angles to this line. The earth-pointing detector determined the macroscopic properties of the plasma ions, obtaining accurate values of their velocity, density, and pressure. Three sequential energy scans were employed with (delta E)/E equal to 20, 7.2, and 1.8%, allowing a coverage from subsonic to highly supersonic flow. The side-looking Faraday cup measured electrons in the energy range from 5 eV to 1 keV. The plasma parameters are obtained by finding the best fit of a convected isotropic Maxwellian distribution to the data. One sigma errors are typically less than 0.5% in the speed and VR, less than 5% for the density and thermal speed, and vary greatly for VT and VN. Sampling times range from 12 to 192 sec., with sampling generally more frequent early in the mission. The velocity components are given in the RTN coordinate system, where R is radially outward, T is in a plane parallel to the solar equatorial plane and positive in the direction of solar rotation, and N completes a right-handed system.",
        "Acknowledgement": "Please acknowledge John W. Belcher (P.I.)",
        "PublicationInfo": {
          "Authors": "Belcher, John W.",
          "PublicationDate": "2025-11-14T16:03:03Z",
          "PublishedBy": "Space Physics Data Facility"
        },
        "Contact": {
          "PersonID": "spase://SMWG/Person/John.W.Belcher",
          "Role": "PrincipalInvestigator"
        },
        "PriorID": [
          "spase://VHO/NumericalData/Voyager1/Plasma/PT12S",
          "spase://VSPO/NumericalData/Voyager1/Plasma/PT12S"
        ]
      },
      "AccessInformation": [
        {
          "RepositoryID": "spase://SMWG/Repository/NASA/GSFC/SPDF",
          "Availability": "Online",
          "AccessRights": "Open",
          "RightsList": {
            "Rights": {
              "SchemeURI": "https://spdx.org/licenses/",
              "RightsIdentifierScheme": "SPDX",
              "RightsIdentifier": "CC0-1.0",
              "RightsURI": "https://spdx.org/licenses/CC0-1.0.html",
              "RightsName": "Creative Commons Zero v1.0 Universal",
              "Note": "CC0 1.0 Universal is the Creative Commons license applicable to all publicly available NASA Heliophysics data products"
            }
          },
          "AccessURL": [
            {
              "Name": "FTPS from SPDF (not with most browsers)",
              "URL": "ftps://spdf.gsfc.nasa.gov/pub/data/voyager/voyager1/plasma/hires/"
            },
            {
              "Name": "HTTPS from SPDF",
              "URL": "https://spdf.gsfc.nasa.gov/pub/data/voyager/voyager1/plasma/hires/",
              "Description": "In CDF via HTTP from SPDF"
            }
          ],
          "Format": "Text"
        },
        {
          "RepositoryID": "spase://SMWG/Repository/MIT_CSR",
          "Availability": "Online",
          "AccessRights": "Open",
          "AccessURL": {
            "Name": "high resolution ASCII data via ftp from MIT",
            "URL": "ftp://space.mit.edu/pub/plasma/vgr/v1/key/"
          },
          "Format": "Text"
        }
      ],
      "InstrumentID": "spase://SMWG/Instrument/Voyager1/MAG",
      "MeasurementType": "ThermalPlasma",
      "TemporalDescription": {
        "TimeSpan": {
          "StartDate": "1977-01-01T00:00:00",
          "StopDate": "1980-12-31T00:00:00"
        },
        "Cadence": "PT12S"
      },
      "ObservedRegion": [
        "Heliosphere.Outer",
        "Heliosphere.NearEarth"
      ],
      "Parameter": [
        {
          "Name": "Year",
          "ParameterKey": "Column_1",
          "Description": "Year",
          "Support": {
            "SupportQuantity": "Temporal"
          }
        },
        {
          "Name": "Day of Year",
          "ParameterKey": "Column_2",
          "Description": "Day of year (day 1 is Jan. 1)",
          "Support": {
            "SupportQuantity": "Temporal"
          }
        },
        {
          "Name": "Decimal Hour",
          "ParameterKey": "Column_3",
          "Support": {
            "SupportQuantity": "Temporal"
          }
        },
        {
          "Name": "Proton Speed",
          "ParameterKey": "Column_4",
          "Units": "km/s",
          "Particle": {
            "ParticleType": "Proton",
            "ParticleQuantity": "FlowSpeed"
          }
        },
        {
          "Name": "Proton Density",
          "ParameterKey": "Column_5",
          "Units": "cm-3",
          "Particle": {
            "ParticleType": "Proton",
            "ParticleQuantity": "NumberDensity"
          }
        },
        {
          "Name": "Proton Thermal Speed",
          "ParameterKey": "Column_6",
          "Caveats": "proton temperature in eV = .0052 times the square of the thermal speed",
          "Units": "km/s",
          "Particle": {
            "ParticleType": "Ion",
            "ParticleQuantity": "ThermalSpeed"
          }
        },
        {
          "Name": "Velocity R Component",
          "ParameterKey": "Column_7",
          "Units": "km/s",
          "CoordinateSystem": {
            "CoordinateRepresentation": "Cartesian",
            "CoordinateSystemName": "RTN"
          },
          "Particle": {
            "ParticleType": "Proton",
            "Qualifier": "Component.I",
            "ParticleQuantity": "Velocity"
          }
        },
        {
          "Name": "Velocity T Component",
          "ParameterKey": "Column_8",
          "Caveats": "WARNING: this parameter is often NOT reliable after 1989",
          "Units": "km/s",
          "CoordinateSystem": {
            "CoordinateRepresentation": "Cartesian",
            "CoordinateSystemName": "RTN"
          },
          "Particle": {
            "ParticleType": "Proton",
            "Qualifier": "Component.J",
            "ParticleQuantity": "Velocity"
          }
        },
        {
          "Name": "Velocity N Component",
          "ParameterKey": "Column_9",
          "Caveats": "WARNING: this parameter is often NOT reliable after 1989",
          "Units": "km/s",
          "CoordinateSystem": {
            "CoordinateRepresentation": "Cartesian",
            "CoordinateSystemName": "RTN"
          },
          "Particle": {
            "ParticleType": "Proton",
            "Qualifier": "Component.K",
            "ParticleQuantity": "Velocity"
          }
        }
      ]
    }
  }
}