{
  "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/POLAR/EFI/SC/GSE/Velocity/PT60S",
      "NamingAuthority": "NASA",
      "ResourceType": "NumericalData",
      "ResourceHeader": {
        "ResourceName": "Polar Electric Fields Instrument (EFI), Spacecraft Velocity in GSE coordinates",
        "ReleaseDate": "2025-12-04T13:31:00Z",
        "RevisionHistory": {
          "RevisionEvent": [
            {
              "ReleaseDate": "2020-07-07T21:15:01Z",
              "Note": "Only known prior ReleaseDate of the metadata"
            },
            {
              "ReleaseDate": "2025-08-05T13:12:20Z",
              "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": "2025-11-14T16:03:07Z",
              "Note": "Added PublicationInfo. Added ResourceType and NamingAuthority. ZCB"
            },
            {
              "ReleaseDate": "2025-12-04T13:31:00Z",
              "Note": "Added MetadataRightsList. Updated to 2.7.1. ZCB"
            }
          ]
        },
        "Description": "The Polar spacecraft velocity, in GSE coordinates.",
        "Acknowledgement": "The user will acknowledge, in any publication which uses POLAR EFI data, the instrument PI.",
        "PublicationInfo": {
          "Authors": "Mozer, Forrest S.",
          "PublicationDate": "2025-11-14T16:03:07Z",
          "PublishedBy": "University of California, Berkeley"
        },
        "Contact": [
          {
            "PersonID": "spase://SMWG/Person/Forrest.S.Mozer",
            "Role": "PrincipalInvestigator"
          },
          {
            "PersonID": "spase://SMWG/Person/Jack.B.Vernetti",
            "Role": "MetadataContact"
          }
        ],
        "PriorID": [
          "spase://VWO/NumericalData/POLAR/EFI/S_C_GSE_Velocity",
          "spase://VSPO/NumericalData/POLAR/EFI/SC/GSE/Velocity/PT60S"
        ]
      },
      "AccessInformation": {
        "RepositoryID": "spase://SMWG/Repository/UCB/POLAR/EFI",
        "Availability": "Online",
        "AccessRights": "Open",
        "AccessURL": {
          "Name": "POLAR EFI data archive",
          "URL": "http://polarefi.ssl.berkeley.edu",
          "Description": "This URL is the root location of the POLAR EFI archive. It consists of Yearly subdirectories: 1996, 1997, ..., 2008 each of which consists of Monthly subdirectories: 01, 02, ..., 12 The archive files for a given date are located in the corresponding YY/MM subdirectory.",
          "Language": "en"
        },
        "Format": "CDF",
        "Encoding": "None",
        "Acknowledgement": "The user will acknowledge, in any publication which uses POLAR EFI data, the instrument PI."
      },
      "InstrumentID": "spase://SMWG/Instrument/POLAR/EFI",
      "MeasurementType": "Ephemeris",
      "TemporalDescription": {
        "TimeSpan": {
          "StartDate": "1996-03-16T00:00:00",
          "StopDate": "2008-04-13T24:00:00"
        },
        "Cadence": "PT60S"
      },
      "ObservedRegion": [
        "Earth.Magnetosphere.Polar",
        "Earth.NearSurface.AuroralRegion",
        "Earth.Magnetosphere"
      ],
      "Parameter": [
        {
          "Name": "Time",
          "ParameterKey": "TIME_TAG",
          "Description": "Data point time-tags which are double precision floating point numbers which represent the number of seconds, UTC, from midnight of the day represented by the file.",
          "Cadence": "PT60S",
          "Units": "seconds",
          "ValidMin": "0.0",
          "ValidMax": "86460.0",
          "Support": {
            "SupportQuantity": "Temporal"
          }
        },
        {
          "Name": "SCVelocityGSEVector",
          "ParameterKey": "DATA_VALUES",
          "Description": "Data point vector values which are a triplet of single precision floating point numbers which represent the X,Y,Z components of the GSE spacecraft velocity, in km/sec.",
          "Cadence": "PT60S",
          "Units": "km/sec",
          "UnitsConversion": "1.0e+3>m/sec",
          "CoordinateSystem": {
            "CoordinateRepresentation": "Cartesian",
            "CoordinateSystemName": "GSE"
          },
          "ValidMin": "-20.0",
          "ValidMax": "20.0",
          "Support": {
            "SupportQuantity": "Velocity"
          }
        }
      ]
    }
  }
}