{
  "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/PioneerVenusOrbiter/Ephemeris/P1D",
      "NamingAuthority": "NASA",
      "ResourceType": "NumericalData",
      "ResourceHeader": {
        "ResourceName": "Pioneer Venus Orbiter(PVO) Daily Trajectory Data",
        "ReleaseDate": "2025-12-04T13:30:56Z",
        "RevisionHistory": {
          "RevisionEvent": [
            {
              "ReleaseDate": "2021-03-11T18:39:11Z",
              "Note": "Only known prior ReleaseDate of the metadata"
            },
            {
              "ReleaseDate": "2025-08-05T13:12:21Z",
              "Note": "Added ObservedRegion(s). 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 value in Version tag. ZCB"
            },
            {
              "ReleaseDate": "2025-12-04T13:30:56Z",
              "Note": "Added MetadataRightsList and RightsList(s). Added ResourceType and NamingAuthority. Updated to 2.7.1. ZCB"
            }
          ]
        },
        "Description": "This data set contains trajectory data from the Pioneer Venus Orbiter. It includes the radial distance of Venus from the sun, and solar ecliptic coordinates of Venus with respect to true equinox and ecliptic of date.",
        "Acknowledgement": "Please acknowledge the Principal Investigator and SPDF.",
        "Contact": [
          {
            "PersonID": "spase://SMWG/Person/Adam.Szabo",
            "Role": "MetadataContact"
          },
          {
            "PersonID": "spase://SMWG/Person/Lawrence.Colin",
            "Role": "ProjectScientist"
          },
          {
            "PersonID": "spase://SMWG/Person/Tamara.J.Kovalick",
            "Role": "GeneralContact"
          }
        ],
        "InformationURL": {
          "Name": "Readme file from SPDF",
          "URL": "https://spdf.gsfc.nasa.gov/pub/data/pioneer/pioneer_venus/traj/pvotrjdy_fmt.txt"
        },
        "PriorID": [
          "spase://VHO/NumericalData/Pioneer_Venus/Ephemeris/P1D",
          "spase://VSPO/NumericalData/PioneerVenusOrbiter/Ephemeris/PT24H",
          "spase://VSPO/NumericalData/PioneerVenusOrbiter/Ephemeris/P1D"
        ]
      },
      "AccessInformation": [
        {
          "RepositoryID": "spase://SMWG/Repository/NASA/GSFC/VHO-VMO",
          "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": "VHO Repository",
            "URL": "https://vho.nasa.gov/mission/pvo/ephemeris/",
            "Description": "VHO holdings of PVO ephemeris"
          },
          "Format": "Text",
          "Encoding": "ASCII"
        },
        {
          "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/pioneer/pioneer_venus/traj/pvotrja.asc",
              "Description": "for daily data via ftp"
            },
            {
              "Name": "HTTPS from SPDF",
              "URL": "https://spdf.gsfc.nasa.gov/pub/data/pioneer/pioneer_venus/traj/pvotrja.asc",
              "Description": "for daily data via http"
            }
          ],
          "Format": "Text"
        }
      ],
      "InstrumentID": "spase://SMWG/Instrument/PioneerVenusOrbiter/Ephemeris",
      "MeasurementType": "Ephemeris",
      "TemporalDescription": {
        "TimeSpan": {
          "StartDate": "1978-01-01T00:00:00Z",
          "StopDate": "1999-12-31T23:59:59Z"
        },
        "Cadence": "P1D"
      },
      "ObservedRegion": "Venus",
      "Parameter": [
        {
          "Name": "Year",
          "ParameterKey": "Field 1",
          "Description": "Year",
          "Support": {
            "SupportQuantity": "Temporal"
          }
        },
        {
          "Name": "DOY",
          "ParameterKey": "Field 2",
          "Description": "Day of Year",
          "Support": {
            "SupportQuantity": "Temporal"
          }
        },
        {
          "Name": "Radial Distance",
          "ParameterKey": "Field 3",
          "Description": "Spacecraft Radial Distance in AU",
          "Units": "AU",
          "UnitsConversion": "1.49598e11>m",
          "CoordinateSystem": {
            "CoordinateRepresentation": "Spherical",
            "CoordinateSystemName": "HGI"
          },
          "Support": {
            "SupportQuantity": "Positional"
          }
        },
        {
          "Name": "HGI Latitude of Spacecraft",
          "ParameterKey": "Field 4",
          "Description": "Spacecraft latitude in the HGI system (degrees)",
          "Units": "degrees",
          "CoordinateSystem": {
            "CoordinateRepresentation": "Spherical",
            "CoordinateSystemName": "HGI"
          },
          "Support": {
            "SupportQuantity": "Positional"
          }
        },
        {
          "Name": "HGI Longitude of Spacecraft",
          "ParameterKey": "Field 5",
          "Description": "Spacecraft longitude in the HGI system (degrees)",
          "Units": "degrees",
          "CoordinateSystem": {
            "CoordinateRepresentation": "Spherical",
            "CoordinateSystemName": "HGI"
          },
          "Support": {
            "SupportQuantity": "Positional"
          }
        }
      ]
    }
  }
}