{
  "Spase": {
    "xmlns": "http://www.spase-group.org/data/schema",
    "xmlns:xsi": "http://www.w3.org/2001/XMLSchema-instance",
    "xsi:schemaLocation": "http://www.spase-group.org/data/schema http://www.spase-group.org/data/schema/spase-2_3_1.xsd",
    "Version": "2.3.1",
    "NumericalData": {
      "ResourceID": "spase://NASA/NumericalData/TWINS2/Ephemeris/Attitude/Definitive/PT0.512S",
      "ResourceHeader": {
        "ResourceName": "TWINS-2 Ephemeris, Definitive Spacecraft Attitude, PT0.512S Data",
        "ReleaseDate": "2021-03-29T17:14:50Z",
        "Description": "Two Wide-angle Imaging Neutral-atom Spectrometers 2, TWINS 2, Spacecraft Attitude data, Earth Centered Inertial, ECI, coordinates.\n\nThis TWINS data set contains spacecraft attitude data as polar and azimuthal instrument pointing vectors. The polar vector points along the TWINS rotation axis. The azimuthal vector lies in the plane normal to the polar vector and points toward the central scanning position, which is defined as the zero-point location. Such pointing is derived from both the spacecraft attitude history, SAH, file and the sensor mounting orientation. The computation employed is designed to achieve a pointing accuracy of 0.5°. Any deviation from this accuracy level is indicated in the header record metadata.",
        "Acknowledgement": "Please acknowledge the Principal Investigator D.J. McComas for use of the Data",
        "Contact": [
          {
            "PersonID": "spase://SMWG/Person/David.J.McComas",
            "Role": "PrincipalInvestigator"
          },
          {
            "PersonID": "spase://SMWG/Person/Robert.M.Candey",
            "Role": "MetadataContact"
          },
          {
            "PersonID": "spase://SMWG/Person/Lee.Frost.Bargatze",
            "Role": "MetadataContact"
          }
        ],
        "InformationURL": {
          "Name": "NSSDC Master Catalog, TWINS 2 spacecraft",
          "URL": "https://nssdc.gsfc.nasa.gov/nmc/spacecraft/display.action?id=2008-010A",
          "Description": "General information concerning the TWINS 2 spacecraft",
          "Language": "en"
        },
        "PriorID": [
          "spase://VSPO/NumericalData/TWINS2/Attitude",
          "spase://VSPO/NumericalData/TWINS2/ENA/TWINS2_AT_DEF_Data",
          "spase://VSPO/NumericalData/TWINS2/Ephemeris/Attitude/Definitive/PT0.512S"
        ]
      },
      "AccessInformation": {
        "RepositoryID": "spase://SMWG/Repository/NASA/GSFC/SPDF",
        "Availability": "Online",
        "AccessRights": "Open",
        "AccessURL": [
          {
            "Name": "FTPS from SPDF (not with most browsers)",
            "URL": "ftps://spdf.gsfc.nasa.gov/pub/data/twins/twins2/ephemeris/att/",
            "Description": "Access to Data in CDF Format via ftp from SPDF"
          },
          {
            "Name": "HTTPS from SPDF",
            "URL": "https://spdf.gsfc.nasa.gov/pub/data/twins/twins2/ephemeris/att/",
            "Description": "Access to Data in CDF Format via http from SPDF"
          },
          {
            "Name": "CDAWeb",
            "URL": "https://cdaweb.gsfc.nasa.gov/cgi-bin/eval2.cgi?dataset=TWINS2_AT_DEF&index=sp_phys",
            "ProductKey": "TWINS2_AT_DEF",
            "Description": "Access to ASCII, CDF, and Plots via NASA/GSFC CDAWeb"
          }
        ],
        "Format": "CDF",
        "Encoding": "None",
        "Acknowledgement": "Please acknowledge the Principal Investigator D.J. McComas. Please acknowledge the Data Providers and CDAWeb when using these Data."
      },
      "ProcessingLevel": "Calibrated",
      "InstrumentID": "spase://SMWG/Instrument/TWINS1/Ephemeris",
      "MeasurementType": "Ephemeris",
      "TemporalDescription": {
        "TimeSpan": {
          "StartDate": "2008-04-14T00:53:59.000",
          "StopDate": "2016-10-27T23:59:59.000"
        },
        "Cadence": "PT0.512S"
      },
      "ObservedRegion": [
        "Earth.Magnetosphere",
        "Earth.Magnetosphere.Magnetotail",
        "Earth.Magnetosphere.Main",
        "Earth.Magnetosphere.RadiationBelt",
        "Earth.Magnetosheath"
      ],
      "Parameter": [
        {
          "Name": "Epoch Time",
          "ParameterKey": "Epoch",
          "Description": "Epoch Time Tags",
          "Cadence": "PT0.512S",
          "RenderingHints": {
            "DisplayType": "TimeSeries",
            "AxisLabel": "Epoch"
          },
          "FillValue": "31-Dec-9999 23:59:59.999",
          "Support": {
            "SupportQuantity": "Temporal"
          }
        },
        {
          "Name": "Start Time, MJD",
          "Set": "Time series defined by using: EPOCH",
          "ParameterKey": "ISTARTTIMEMJD",
          "Description": "Start Time, Mission Julian Date, MJD, time key of data point",
          "Cadence": "PT0.512S",
          "RenderingHints": {
            "DisplayType": "TimeSeries",
            "AxisLabel": "Start Time MJD",
            "ValueFormat": "F30.12"
          },
          "FillValue": "-1.0e+31",
          "Support": {
            "SupportQuantity": "Temporal"
          }
        },
        {
          "Name": "Spacecraft Attitude, Polar Pointing Vector, ECI Cartesian Coordinates",
          "Set": "Time series defined by using: EPOCH",
          "ParameterKey": "FPOLARPOINTECI",
          "Description": "Spacecraft Attitude, Polar Pointing Vector, Earth Centered Inertial, ECI, Cartesian Coordinates",
          "Cadence": "PT0.512S",
          "CoordinateSystem": {
            "CoordinateRepresentation": "Cartesian",
            "CoordinateSystemName": "GEI"
          },
          "RenderingHints": {
            "DisplayType": "TimeSeries",
            "AxisLabel": "Polar ECI XYZ",
            "ValueFormat": "F16.12"
          },
          "Structure": {
            "Size": "3",
            "Element": [
              {
                "Name": "FPOLARPOINTECI X",
                "Index": "1",
                "RenderingHints": {
                  "AxisLabel": "x"
                }
              },
              {
                "Name": "FPOLARPOINTECI Y",
                "Index": "2",
                "RenderingHints": {
                  "AxisLabel": "y"
                }
              },
              {
                "Name": "FPOLARPOINTECI Z",
                "Index": "3",
                "RenderingHints": {
                  "AxisLabel": "z"
                }
              }
            ]
          },
          "ValidMin": "-1.0",
          "ValidMax": "1.0",
          "FillValue": "-1.0e+31",
          "Support": {
            "Qualifier": [
              "DirectionAngle.PolarAngle",
              "Vector"
            ],
            "SupportQuantity": "Velocity"
          }
        },
        {
          "Name": "Spacecraft Attitude, Azimuthal Pointing Vector, ECI Cartesian Coordinates",
          "Set": "Time series defined by using: EPOCH",
          "ParameterKey": "FAZIMUTHALPOINTECI",
          "Description": "Spacecraft Attitude, Azimuthal Pointing Vector, Earth Centered Inertial, ECI, Cartesian Coordinates",
          "Cadence": "PT0.512S",
          "CoordinateSystem": {
            "CoordinateRepresentation": "Cartesian",
            "CoordinateSystemName": "GEI"
          },
          "RenderingHints": {
            "DisplayType": "TimeSeries",
            "AxisLabel": "Azimuthal ECI XYZ",
            "ValueFormat": "F16.12"
          },
          "Structure": {
            "Size": "3",
            "Element": [
              {
                "Name": "FAZIMUTHALPOINTECI X",
                "Index": "1",
                "RenderingHints": {
                  "AxisLabel": "x"
                }
              },
              {
                "Name": "FAZIMUTHALPOINTECI Y",
                "Index": "2",
                "RenderingHints": {
                  "AxisLabel": "y"
                }
              },
              {
                "Name": "FAZIMUTHALPOINTECI Z",
                "Index": "3",
                "RenderingHints": {
                  "AxisLabel": "z"
                }
              }
            ]
          },
          "ValidMin": "-1.0",
          "ValidMax": "1.0",
          "FillValue": "-1.0e+31",
          "Support": {
            "Qualifier": [
              "DirectionAngle.AzimuthAngle",
              "Vector"
            ],
            "SupportQuantity": "Velocity"
          }
        },
        {
          "Name": "TWINS Data File ID",
          "Set": "Time series defined by using: EPOCH",
          "ParameterKey": "NDATAFILEID",
          "Description": "TWINS Data File ID as used in TWINS database storage system",
          "Cadence": "PT0.512S",
          "RenderingHints": {
            "DisplayType": "TimeSeries",
            "AxisLabel": "DataFile ID",
            "ValueFormat": "F7"
          },
          "ValidMin": "0",
          "ValidMax": "2147483647",
          "FillValue": "-2012696540",
          "Support": {
            "SupportQuantity": "Other"
          }
        }
      ]
    }
  }
}