{
  "id": "IG_K0_PCI",
  "url": "http://hpde.io/NASA/NumericalData/Interball/PC_Index/KeyParameter/K0/PT5M",
  "data-file": "./data/spase_hpde_io/info/IG_K0_PCI.json",
  "data": {
    "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/Interball/PC_Index/KeyParameter/K0/PT5M",
        "NamingAuthority": "NASA",
        "ResourceType": "NumericalData",
        "ResourceHeader": {
          "ResourceName": "Polar Cap (PC), Northern and Southern Hemisphere Activity Indices, 5 min Data",
          "ReleaseDate": "2025-12-04T13:29:35Z",
          "RevisionHistory": {
            "RevisionEvent": [
              {
                "ReleaseDate": "2021-04-27T15:38:11Z",
                "Note": "Only known prior ReleaseDate of the metadata"
              },
              {
                "ReleaseDate": "2025-11-14T16:02:25Z",
                "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": "2025-12-04T13:29:35Z",
                "Note": "Added MetadataRightsList and RightsList(s). Updated to 2.7.1. ZCB"
              }
            ]
          },
          "Description": "The PC Index is an Empirical Magnetic Activity Index based on Data from Single Near-Pole Station, Thule for the Northern Hemisphere and Vostok for the Southern Hemisphere, respectively). Its Derivation Procedure is optimized to achieve the Best Correlation of PC Index with the Solar Wind Electric Field, SWEF, Magnitude quantified by v*B*sin((theta/2)^2). The Average Horizontal Magnetic Disturbance Vector, Quiet Value subtracted, is projected onto the Optimal Direction, which is defined empirically for each UT Hour and each Season based on the Best COrrelation with the SWEF. After Normalization to the Equivalent Value of the SWEF, the PC Index is expressed in Units of mV/m. Although the PC Index is formally expressed in mV/m, it actually represents the Measure of Magnetic Activity, the Normalization Procedure to SWEF helps to reduce Seasonal and Diurnal Effects to facilitate the Intercomparison. The Time Resolution of the Northern Cap PC Index is 5 min while it is 15 min form the Southern PC Index. However, one Time SCale with a 5 min Step is used for both Indices and each 15 min averaged Value of southern index is, hence, repeated three Times. References: 1. Troshichev, O.A., et al., Planet. Space Sci., 36, 1095, 1988, 2. Vennerstrom, S., et al., Report UAG-103, World Data Center A for STP, Boulder, April 1994.",
          "Acknowledgement": "O.A. Troshichev",
          "PublicationInfo": {
            "Authors": "Troshichev, Oleg A.",
            "PublicationDate": "2025-11-14T16:02:25Z",
            "PublishedBy": "Space Physics Data Facility"
          },
          "Contact": [
            {
              "PersonID": "spase://SMWG/Person/Oleg.A.Troshichev",
              "Role": "PrincipalInvestigator"
            },
            {
              "PersonID": "spase://SMWG/Person/Robert.E.McGuire",
              "Role": "MetadataContact"
            },
            {
              "PersonID": "spase://SMWG/Person/Lee.Frost.Bargatze",
              "Role": "MetadataContact"
            }
          ],
          "PriorID": "spase://VSPO/NumericalData/Interball/PC_Index/KeyParameter/K0/PT5M"
        },
        "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/interball/ground/geo_index/",
              "Description": "Access to Data in CDF Format via ftp from SPDF"
            },
            "Format": "CDF",
            "Encoding": "None",
            "Acknowledgement": "O.A. Troshichev. Please acknowledge the data providers and CDAWeb when using these data."
          },
          {
            "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": "HTTPS from SPDF",
              "URL": "https://spdf.gsfc.nasa.gov/pub/data/interball/ground/geo_index/",
              "Description": "Access to Data in CDF Format via http from SPDF"
            },
            "Format": "CDF",
            "Encoding": "None",
            "Acknowledgement": "O.A. Troshichev. Please acknowledge the data providers and CDAWeb when using these data."
          },
          {
            "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": "CDAWeb",
              "URL": "https://cdaweb.gsfc.nasa.gov/cgi-bin/eval2.cgi?dataset=IG_K0_PCI&index=sp_phys",
              "ProductKey": "IG_K0_PCI",
              "Description": "Access to ASCII, CDF, and plots via NASA/GSFC CDAWeb"
            },
            "Format": "CDF",
            "Encoding": "None",
            "Acknowledgement": "O.A. Troshichev. Please acknowledge the data providers and CDAWeb when using these data."
          },
          {
            "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": "CDAWeb HAPI Server",
              "URL": "https://cdaweb.gsfc.nasa.gov/hapi",
              "Style": "HAPI",
              "ProductKey": "IG_K0_PCI",
              "Description": "Web Service to this product using the HAPI interface."
            },
            "Format": "CSV",
            "Acknowledgement": "O.A. Troshichev. Please acknowledge the data providers and CDAWeb when using these data."
          }
        ],
        "ProcessingLevel": "Calibrated",
        "InstrumentID": [
          "spase://SMWG/Instrument/Ground/Thule.Air.Base/Magnetometer",
          "spase://SMWG/Instrument/Ground/Vostok/Magnetometer"
        ],
        "MeasurementType": "ActivityIndex",
        "TemporalDescription": {
          "TimeSpan": {
            "StartDate": "1995-08-07T00:02:30",
            "StopDate": "2000-10-22T23:57:30"
          },
          "Cadence": "PT5M"
        },
        "ObservedRegion": "Earth.NearSurface.PolarCap",
        "Parameter": {
          "Epoch": {
            "Name": "Epoch Time, Centered",
            "ParameterKey": "Epoch",
            "Description": "Epoch Time, Centered",
            "Caveats": "This parameter exhibits an increasing monotonic progression.",
            "Cadence": "PT5M",
            "Units": "ms",
            "UnitsConversion": "1e-3>s",
            "RenderingHints": {
              "AxisLabel": "Epoch",
              "ScaleMin": "6.2974951569904e+13",
              "ScaleMax": "6.2975556069904e+13"
            },
            "ValidMin": "01-Jan-1994 00:00:00.000",
            "ValidMax": "31-Dec-2020 23:59:59.000",
            "FillValue": "-1.0e+31",
            "Support": {
              "SupportQuantity": "Temporal"
            }
          },
          "PC_Vostok": {
            "Name": "Southern PC Index, PCS, Vostok",
            "Set": "Time series defined by using: EPOCH",
            "ParameterKey": "PC_Vostok",
            "Description": "Southern Polar Cap Magnetic Activity Index, PCS, Vostok",
            "Caveats": "15 min averaged value of southern index is repeated for three times.",
            "Cadence": "PT5M",
            "Units": "mV/m",
            "UnitsConversion": "1e-3>V/m",
            "RenderingHints": {
              "DisplayType": "TimeSeries",
              "AxisLabel": "PCS",
              "ValueFormat": "F5.1",
              "ScaleMin": "-5.0",
              "ScaleMax": "15.0"
            },
            "ValidMin": "-10.0",
            "ValidMax": "30.0",
            "FillValue": "-1.0e+31",
            "Field": {
              "FieldQuantity": "Electric"
            }
          },
          "PC_Thule": {
            "Name": "Northern PC Index, PCN, Thule",
            "Set": "Time series defined by using: EPOCH",
            "ParameterKey": "PC_Thule",
            "Description": "Northern Polar Cap Magnetic Activity Index, PCN, Thule",
            "Caveats": "5 min. resolution",
            "Cadence": "PT5M",
            "Units": "mV/m",
            "UnitsConversion": "1e-3>V/m",
            "RenderingHints": {
              "DisplayType": "TimeSeries",
              "AxisLabel": "PCN",
              "ValueFormat": "F5.1",
              "ScaleMin": "-5.0",
              "ScaleMax": "15.0"
            },
            "ValidMin": "-10.0",
            "ValidMax": "30.0",
            "FillValue": "-1.0e+31",
            "Field": {
              "FieldQuantity": "Electric"
            }
          },
          "Flag_Vostok": {
            "Name": "Status Flag, PCS",
            "Set": "Time series defined by using: EPOCH",
            "ParameterKey": "Flag_Vostok",
            "Description": "Status Flag, PCS: 0=Good Data, 2=Missing Data, 5=Data Delayed",
            "Caveats": "Average Type: none",
            "Cadence": "PT5M",
            "RenderingHints": {
              "AxisLabel": "FLag_S",
              "ValueFormat": "I2",
              "ScaleMin": "0",
              "ScaleMax": "5"
            },
            "ValidMin": "0",
            "ValidMax": "5",
            "FillValue": "128",
            "Support": {
              "SupportQuantity": "InstrumentMode"
            }
          },
          "Flag_Thule": {
            "Name": "Status Flag, PCN",
            "Set": "Time series defined by using: EPOCH",
            "ParameterKey": "Flag_Thule",
            "Description": "Status Flag, PCN: 0=Good Data, 2=Missing Data, 5=Data Delayed",
            "Caveats": "Average Type: none",
            "Cadence": "PT5M",
            "RenderingHints": {
              "AxisLabel": "Flag_N",
              "ValueFormat": "I2",
              "ScaleMin": "0",
              "ScaleMax": "5"
            },
            "ValidMin": "0",
            "ValidMax": "5",
            "FillValue": "128",
            "Support": {
              "SupportQuantity": "InstrumentMode"
            }
          },
          "Gap_Flag": {
            "Name": "Post Gap Flag",
            "Set": "Time series defined by using: EPOCH",
            "ParameterKey": "Gap_Flag",
            "Description": "Post Gap Flag: 0=No Gap before this Point, Values 1 to 5 denote Specific Gap Types",
            "Caveats": "Average Type: none",
            "Cadence": "PT5M",
            "RenderingHints": {
              "AxisLabel": "GAP_FLAG",
              "ValueFormat": "I1",
              "ScaleMin": "0",
              "ScaleMax": "5"
            },
            "ValidMin": "0",
            "ValidMax": "5",
            "FillValue": "-2147483648",
            "Support": {
              "SupportQuantity": "InstrumentMode"
            }
          }
        }
      }
    }
  }
}