{
  "Spase": {
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        "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/ISIS2/IMS/Plasma_Data",
      "NamingAuthority": "NASA",
      "ResourceType": "NumericalData",
      "ResourceHeader": {
        "ResourceName": "ISIS 2/IMS/Plasma Data",
        "ReleaseDate": "2025-12-04T13:29:41Z",
        "RevisionHistory": {
          "RevisionEvent": [
            {
              "ReleaseDate": "2020-07-07T21:14:42Z",
              "Note": "Only known prior ReleaseDate of the metadata"
            },
            {
              "ReleaseDate": "2025-11-14T16:02:28Z",
              "Note": "Added PublicationInfo. Added ResourceType and NamingAuthority. ZCB"
            },
            {
              "ReleaseDate": "2025-12-04T13:29:41Z",
              "Note": "Added MetadataRightsList and RightsList(s). Updated to 2.7.1. ZCB"
            }
          ]
        },
        "Description": "This set of plasma data came from the ISIS 2 (International Satellites for Ionospheric Studies) ion-mass spectrometer experiment.  Ion densities of various ion species are available for the lower range (1-8 atomic mass units, H+, D+, He+, N++, O++) and the upper range (8-64 atomic mass units, O++, N+, O+, 18+, N2+, NO+, O2+).  Also included in the data set are spacecraft position data, geomagnetic field intensity, F107 flux (daily solar radio flux), Kp indices, and Dst indices.",
        "PublicationInfo": {
          "Authors": "Hoffman, John H.",
          "PublicationDate": "2025-11-14T16:02:28Z",
          "PublishedBy": "Space Physics Data Facility"
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        "Contact": {
          "PersonID": "spase://SMWG/Person/John.H.Hoffman",
          "Role": "PrincipalInvestigator"
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        "PriorID": "spase://VSPO/NumericalData/ISIS2/IMS/Plasma_Data"
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      "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/isis/ion-mass_spectrometer_ascii_binary/"
          },
          {
            "Name": "HTTPS from SPDF",
            "URL": "https://spdf.gsfc.nasa.gov/pub/data/isis/ion-mass_spectrometer_ascii_binary/"
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        "Format": "Text"
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      "InstrumentID": "spase://SMWG/Instrument/ISIS2/IMS",
      "MeasurementType": "IonComposition",
      "TemporalDescription": {
        "TimeSpan": {
          "StartDate": "1971-04-21T00:12:41",
          "StopDate": "1972-12-31T23:20:43"
        }
      },
      "ObservedRegion": "Earth.NearSurface.Ionosphere"
    }
  }
}