{
  "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": "2.7.2",
    "MetadataRightsList": {
      "Rights": {
        "SchemeURI": "https://spdx.org/licenses/",
        "RightsIdentifierScheme": "SPDX",
        "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"
      }
    },
    "Catalog": {
      "ResourceID": "spase://NASA/Catalog/OMNI/Composite_1982-88_Sector_Boundary",
      "NamingAuthority": "NASA",
      "ResourceType": "Catalog",
      "ResourceHeader": {
        "ResourceName": "IMF Sector Boundaries 1982-1988 Composite",
        "ReleaseDate": "2026-02-22T13:10:26",
        "Description": "The IMF Sector Boundaries 1982-1988 Composite from the Wilcox Solar Observatory is a catalog listing well-defined interplanetary magnetic field sector boundaries and heliospheric current sheet crossings. It uses daily polarity distributions and in situ plasma/magnetic field data.\nOmnitape Data: Hourly or daily averaged solar wind velocity, density, and magnetic field polarity reversal measurements from near-Earth spacecraft archives.\nComposite Computations: Combined actual spacecraft measurements with inferred daily polarities from ground-based geomagnetic data to fill missing intervals.\nBoundary Criteria: Identified via clear spiral field polarity reversals paired with typical heliospheric current sheet plasma signatures (low velocity and high density).",
        "Contact": [
          {
            "PersonID": "spase://SMWG/Person/Xuepu.Zhao",
            "Role": "Author"
          },
          {
            "PersonID": "spase://SMWG/Person/Olga.Y.Uritskaya",
            "Role": "MetadataContact"
          }
        ]
      },
      "AccessInformation": {
        "RepositoryID": "spase://SMWG/Repository/WSO",
        "AccessURL": {
          "URL": "http://wso.stanford.edu/SB/SBlist1.html"
        },
        "Format": "HTML"
      },
      "InstrumentID": "spase://SMWG/Instrument/OMNI",
      "PhenomenonType": "SectorBoundaryCrossing",
      "TimeSpan": {
        "StartDate": "1982-06-23T00:00:00",
        "StopDate": "1988-10-05T00:00:00"
      },
      "Parameter": [
        {
          "Name": "Date",
          "Support": {
            "SupportQuantity": "Temporal"
          }
        },
        {
          "Name": "Polarity indicators",
          "Description": "The composite polarity (the computed daily polarity plus the inferred daily polarity replacing the missising data) daily polarity distributions by using a modified definition of the \"well-defined\" sector boundary. Here \"+\" refers to a UT day of outward polarity; \"-\" to a day of inward polarity and \":\" to a day of mixed polarity.",
          "Support": {
            "SupportQuantity": "Other"
          }
        }
      ]
    }
  }
}