{
  "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"
      }
    },
    "Catalog": {
      "ResourceID": "spase://NASA/Catalog/Svalgaard/Sector.Boundary.Crossing",
      "NamingAuthority": "NASA",
      "ResourceType": "Catalog",
      "ResourceHeader": {
        "ResourceName": "L. Svalgaard's Interplanetary Sector Boundary Crossing List",
        "DOI": "https://doi.org/10.48322/b9m5-f869",
        "ReleaseDate": "2026-02-02T13:10:26Z",
        "RevisionHistory": {
          "RevisionEvent": [
            {
              "ReleaseDate": "2023-05-11T12:34:56.789",
              "Note": "Updated to SPASE Version 2.5.0 if needed, Added DOI information, JMW"
            },
            {
              "ReleaseDate": "2026-02-02T13:10:26Z",
              "Note": "Added MetadataRightsList. Added ResourceType and NamingAuthority. Updated to 2.7.1. Changed http to https in top-level schemaLocation attribute. Fixed version number separator in top-level schemaLocation attribute. ZCB"
            }
          ]
        },
        "Description": "This list of interplanetary sector boundary crossings, \nnow spanning 1926-2011, has been compiled by Leif Svalgaard from ground \nmagnetometer data and in situ interplanetary magnetic field observations \nIdentification of the boundaries is discussed at the \"InformationURL\" \ngiven below.  For each crossing, the day of crossing, the direction of \ncrossing (+to- or -to+) and the durations (in whole days) of single-polarity \nintervals on either side of the crossing are given.  As of early 2012, the \nlist was being kept current.",
        "Acknowledgement": "Leif Svalgaard for creating and maintaining this \nevent list",
        "PublicationInfo": {
          "Authors": "Leif Svalgaard",
          "PublicationDate": "2022-01-01T00:00:00",
          "PublishedBy": "Leif Svalgaard, Stanford University"
        },
        "Contact": {
          "PersonID": "spase://SMWG/Person/Leif.Svalgaard",
          "Role": "DataProducer"
        },
        "InformationURL": {
          "Name": "SB event list introductory page",
          "URL": "http://wso.stanford.edu/SB/SB.html",
          "Description": "Link to Svalgaard and other sector boundary crossing lists"
        },
        "PriorID": [
          "spase://VSPO/Catalog/Svalgaard_SB_List",
          "spase://VSPO/Catalog/Svalgaard/Sector.Boundary.Crossing"
        ]
      },
      "AccessInformation": {
        "RepositoryID": "spase://SMWG/Repository/WSO",
        "Availability": "Online",
        "AccessRights": "Open",
        "AccessURL": {
          "Name": "Sector boundary crossing list",
          "URL": "https://www.leif.org/research/sblist.txt"
        },
        "Format": "Text"
      },
      "PhenomenonType": "SectorBoundaryCrossing",
      "TimeSpan": {
        "StartDate": "1926-01-29T00:00:00",
        "RelativeStopDate": "-P1M",
        "Note": "As of 2/8/2012, last SB crossing was for 1/25/2012"
      }
    }
  }
}