{
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    "xsi:schemaLocation": "https://www.spase-group.org/data/schema  https://www.spase-group.org/data/schema/spase-2.7.1.xsd",
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    "Catalog": {
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      "ResourceHeader": {
        "ResourceName": "Helios Shocks Catalog",
        "ReleaseDate": "2026-04-27T12:39:33",
        "Description": "List of interplanetary shocks observed by the Helios spacecraft between 1974 and 1985. Provides shock parameters for interplanetary shocks associated with solar energetic particle events listed in the SERPENTINE Helios (historical) SEP event catalog.",
        "Contact": [
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            "Role": "Author"
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          {
            "PersonID": "spase://SMWG/Person/Jan.Gieseler",
            "Role": "Author"
          },
          {
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            "Role": "MetadataContact"
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      "AccessInformation": {
        "RepositoryID": "spase://SMWG/Repository/SERPENTINE",
        "AccessURL": {
          "URL": "https://data.serpentine-h2020.eu/catalogs/shock-helios/"
        },
        "Format": "HTML"
      },
      "InstrumentID": [
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        "spase://SMWG/Instrument/Helios2/Ephemeris"
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      "PhenomenonType": "InterplanetaryShock",
      "TimeSpan": {
        "StartDate": "1975-07-29T22:59:00",
        "StopDate": "1981-11-23T15:31:00"
      },
      "Parameter": [
        {
          "Name": "ID",
          "Support": {
            "SupportQuantity": "Housekeeping"
          }
        },
        {
          "Name": "Spacecraft",
          "Support": {
            "SupportQuantity": "Other"
          }
        },
        {
          "Name": "Date [UTC]",
          "Support": {
            "SupportQuantity": "Temporal"
          }
        },
        {
          "Name": "Time, [UTC]",
          "Support": {
            "SupportQuantity": "Temporal"
          }
        },
        {
          "Name": "Shock normal [RTN]",
          "Support": {
            "SupportQuantity": "Other"
          }
        },
        {
          "Name": "Magnetic Field compression ratio Bd/Bu\t",
          "Support": {
            "SupportQuantity": "Other"
          }
        },
        {
          "Name": "Plasma Density compression ratio Nd/Nu",
          "Support": {
            "SupportQuantity": "Other"
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        },
        {
          "Name": "Shock angle [deg]",
          "Support": {
            "SupportQuantity": "Orientation"
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        },
        {
          "Name": "Shock speed [km/s]",
          "Support": {
            "SupportQuantity": "Velocity"
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        },
        {
          "Name": "Alfven Mash number MA",
          "Support": {
            "SupportQuantity": "Other"
          }
        },
        {
          "Name": "Magnetosonic Mach number Mms\t",
          "Support": {
            "SupportQuantity": "Other"
          }
        },
        {
          "Name": "Associated SEP events",
          "Support": {
            "SupportQuantity": "WebResource"
          }
        },
        {
          "Name": "Comments",
          "Support": {
            "SupportQuantity": "Remark"
          }
        }
      ]
    }
  }
}