{
  "Spase": {
    "xmlns:xsi": "http://www.w3.org/2001/XMLSchema-instance",
    "xmlns": "http://www.spase-group.org/data/schema",
    "xsi:schemaLocation": "http://www.spase-group.org/data/schema http://www.spase-group.org/data/schema/spase-2_4_0.xsd",
    "Version": "2.4.0",
    "Catalog": {
      "ResourceID": "spase://GBO/Catalog/McPherron/SuperMagLowerIndex/SubstormOnsetList",
      "ResourceHeader": {
        "ResourceName": "SuperMAG Lower Index (SML) Onsets List",
        "AlternateName": "SML Onsets List",
        "DOI": "https://doi.org/10.48322/v3c2-4a19",
        "ReleaseDate": "2021-11-25T00:00:00.000",
        "Description": "This catalog has a list of SuperMAG lower index (SML) substorm Onsets Events observed by the SuperMAG ground magnetometers. This list consists of 118,522 events where it was possible to determine the time of onset of the negative bay and several attributes of these bays.",
        "Acknowledgement": "Robert L. McPherron. Data used in this work were obtained from several sources identified here by name and URL: World Data Center for Geomagnetism, http://wdc.kugi.kyoto-u.ac.jp/; National Space Science Data Center, https://nssdc.gsfc.nasa.gov/; SuperMAG Project, https://SuperMAG.jhuapl.edu. Detailed acknowledgment guidelines are provided at http://supermag.jhuapl.edu/acknowledgment.html. If data downloaded from the VMO Data Repository are used in publication kindly acknowledge the Virtual Magnetospheric Observatory, Earth, Planetary and Space Science Department, University of California, Los Angeles for providing access to the data.",
        "PublicationInfo": {
          "Authors": "McPherron, Robert L.",
          "PublicationDate": "2021-11-29T00:00:00",
          "PublishedBy": "Journal of Geohysical Research - Space Physics"
        },
        "Funding": {
          "Agency": "National Science Foundation",
          "Project": "GEM: A Statistical Study of the Substorm Sequence and Phenomena Associated with Expansion Onset",
          "AwardNumber": "1602588"
        },
        "Contact": {
          "PersonID": "spase://SMWG/Person/Robert.L.McPherron",
          "Role": "GeneralContact"
        }
      },
      "AccessInformation": {
        "RepositoryID": "spase://SMWG/Repository/UCLA/VMO",
        "Availability": "Online",
        "AccessRights": "Open",
        "AccessURL": {
          "Name": "SML onset list, text version",
          "URL": "http://vmo.igpp.ucla.edu/data1/McPherron/NegativeBayList/SMLonsets.txt",
          "Description": "SuperMAG lower index substorm onset list."
        },
        "Format": "Text"
      },
      "InstrumentID": "spase://SMWG/Instrument/SuperMAG/Magnetometers",
      "PhenomenonType": "Substorm",
      "TimeSpan": {
        "StartDate": "1966-11-17T23:13:00Z",
        "StopDate": "2020-12-31T21:50:00Z",
        "Note": "This list consists of 118,522 events where it was possible to determine the time of onset of the negative bay and several attributes of these bays."
      },
      "Keyword": [
        "Substorm",
        "SuperMAG"
      ],
      "Parameter": [
        {
          "Name": "Onset Year",
          "ParameterKey": "Column 1",
          "Description": "Year of the substorm onset",
          "Units": "years",
          "ValidMin": "1966",
          "ValidMax": "2020",
          "Support": {
            "Qualifier": "Scalar",
            "SupportQuantity": "Temporal"
          }
        },
        {
          "Name": "Onset month",
          "ParameterKey": "Column 2",
          "Description": "Month of the substorm onset",
          "Units": "months",
          "ValidMin": "1",
          "ValidMax": "12",
          "Support": {
            "Qualifier": "Scalar",
            "SupportQuantity": "Temporal"
          }
        },
        {
          "Name": "Onset month day",
          "ParameterKey": "Column 3",
          "Description": "Day of the month of the substorm onset",
          "Units": "days",
          "ValidMin": "1",
          "ValidMax": "31",
          "Support": {
            "Qualifier": "Scalar",
            "SupportQuantity": "Temporal"
          }
        },
        {
          "Name": "Onset hour",
          "ParameterKey": "Column 4",
          "Description": "Hour of the substorm onset",
          "Units": "hours",
          "ValidMin": "0",
          "ValidMax": "24",
          "Support": {
            "Qualifier": "Scalar",
            "SupportQuantity": "Temporal"
          }
        },
        {
          "Name": "Onset minute",
          "ParameterKey": "Column 5",
          "Description": "Minute of the substorm onset",
          "Units": "minutes",
          "ValidMin": "0",
          "ValidMax": "59",
          "Support": {
            "Qualifier": "Scalar",
            "SupportQuantity": "Temporal"
          }
        },
        {
          "Name": "Onset second",
          "ParameterKey": "Column 6",
          "Description": "Second of the substorm onset (always zero)",
          "Units": "seconds",
          "ValidMin": "0",
          "ValidMax": "0",
          "Support": {
            "Qualifier": "Scalar",
            "SupportQuantity": "Temporal"
          }
        },
        {
          "Name": "NB",
          "ParameterKey": "Column 7",
          "Description": "Index in SML series of start of segment. The index values correspond to the number of minutes from the start of the file of SML data to a given record. This file starts with record 1 at [1966, 1,1, 0, 0, 0]. For several reasons our first onset occurs late in the year at '17-Nov-1966 23:13:00' and the last onset is at '31-Dec-2020 21:50:00'.",
          "Units": "minutes",
          "ValidMin": "0",
          "ValidMax": "28928037",
          "Support": {
            "Qualifier": "Scalar",
            "SupportQuantity": "Temporal"
          }
        },
        {
          "Name": "NE",
          "ParameterKey": "Column 8",
          "Description": "Index in SML series of end of segment. The index values correspond to the number of minutes from the start of the file of SML data to a given record. This file starts with record 1 at [1966, 1,1, 0, 0, 0]. For several reasons our first onset occurs late in the year at '17-Nov-1966 23:13:00' and the last onset is at '31-Dec-2020 21:50:00'.",
          "Units": "minutes",
          "ValidMin": "0",
          "ValidMax": "28928055",
          "Support": {
            "Qualifier": "Scalar",
            "SupportQuantity": "Temporal"
          }
        },
        {
          "Name": "IO",
          "ParameterKey": "Column 9",
          "Description": "The index of the onset. The index values correspond to the number of minutes from the start of the file of SML data to a given record. This file starts with record 1 at [1966, 1,1, 0, 0, 0]. For several reasons our first onset occurs late in the year at '17-Nov-1966 23:13:00' and the last onset is at '31-Dec-2020 21:50:00'.",
          "Units": "minutes",
          "ValidMin": "0",
          "ValidMax": "28928031",
          "Support": {
            "Qualifier": "Scalar",
            "SupportQuantity": "Temporal"
          }
        },
        {
          "Name": "IN",
          "ParameterKey": "Column 10",
          "Description": "The index at minimum. The index values correspond to the number of minutes from the start of the file of SML data to a given record. This file starts with record 1 at [1966, 1,1, 0, 0, 0]. For several reasons our first onset occurs late in the year at '17-Nov-1966 23:13:00' and the last onset is at '31-Dec-2020 21:50:00'.",
          "Units": "minutes",
          "ValidMin": "0",
          "ValidMax": "57856068",
          "Support": {
            "Qualifier": "Scalar",
            "SupportQuantity": "Temporal"
          }
        },
        {
          "Name": "valo",
          "ParameterKey": "Column 11",
          "Description": "The value of SML at onset",
          "Units": "nT",
          "Field": {
            "Qualifier": "Vector",
            "FieldQuantity": "Magnetic"
          }
        },
        {
          "Name": "valn",
          "ParameterKey": "Column 12",
          "Description": "The value of SML at minimum",
          "Units": "nT",
          "Field": {
            "Qualifier": "Vector",
            "FieldQuantity": "Magnetic"
          }
        },
        {
          "Name": "dels",
          "ParameterKey": "Column 13",
          "Description": "The magnitude of the SML decrease",
          "Units": "nT",
          "Field": {
            "Qualifier": "Magnitude",
            "FieldQuantity": "Magnetic"
          }
        },
        {
          "Name": "durx",
          "ParameterKey": "column 14",
          "Description": "Duration of expansion phase in integer minutes",
          "Units": "minutes",
          "Support": {
            "Qualifier": "Scalar",
            "SupportQuantity": "Temporal"
          }
        }
      ]
    }
  }
}