{
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        "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"
      }
    },
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      "NamingAuthority": "NASA",
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        "RevisionHistory": {
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              "ReleaseDate": "2020-07-07T21:14:45Z",
              "Note": "Only known prior ReleaseDate of the metadata"
            },
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              "ReleaseDate": "2025-08-05T13:12:18Z",
              "Note": "Added ObservedRegion(s). Changed http to https in top-level schemaLocation attribute. Fixed version number separator in top-level schemaLocation attribute. Matched version number in schemaLocation attribute to value in Version tag. ZCB"
            },
            {
              "ReleaseDate": "2025-12-04T13:29:54Z",
              "Note": "Added MetadataRightsList and RightsList(s). Added ResourceType and NamingAuthority. Updated to 2.7.1. ZCB"
            }
          ]
        },
        "Description": "MGS satellite positions.",
        "Contact": {
          "PersonID": "spase://SMWG/Person/Jan.Merka",
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        "AccessRights": "Open",
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            "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": "VHO-VMO Repository",
          "URL": "https://vho.nasa.gov/mission/mgs_proxy/positions/",
          "Description": "VHO Repository housing MGS ephemeris data"
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        "Format": "Text",
        "Encoding": "None"
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      "InstrumentID": "spase://SMWG/Instrument/MGS/Ephemeris",
      "MeasurementType": "Ephemeris",
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          "Units": "Deg",
          "Support": {
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        {
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          "Description": "Distance from the sun in AU",
          "Support": {
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        },
        {
          "Name": "HGI Longitude",
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}