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  "url": "http://hpde.io/VMO/NumericalData/Geotail/Ephemeris/PT10M",
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          "ReleaseDate": "2010-04-05T22:16:33Z",
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            {
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            "RelativeStopDate": "-P7D"
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            "ParameterKey": "GCI_POS",
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          },
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            "ParameterKey": "SUN_VECTOR",
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            "ParameterKey": "HEC_POS",
            "Description": "Spacecraft position vector in HEC coordinates",
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            "UnitsConversion": "1e3>m",
            "CoordinateSystem": {
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          },
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            "Name": "HEC Cartesian Velocity",
            "ParameterKey": "HEC_VEL",
            "Description": "Spacecraft orbital velocity vector in HEC coordinates",
            "Units": "km/s",
            "UnitsConversion": "1e3>m/s",
            "CoordinateSystem": {
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              ]
            },
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          },
          "CRN_EARTH": {
            "Name": "Carrington Rotation Number",
            "ParameterKey": "CRN_EARTH",
            "Description": "Carrington rotation number of the Earth",
            "ValidMin": "1857",
            "ValidMax": "2239",
            "FillValue": "-2147483648",
            "Support": {
              "SupportQuantity": "Positional"
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          },
          "LONG_EARTH": {
            "Name": "Heliographic Long of the Earth",
            "ParameterKey": "LONG_EARTH",
            "Description": "Heliographic longitude of the Earth",
            "Units": "rad",
            "CoordinateSystem": {
              "CoordinateRepresentation": "Spherical",
              "CoordinateSystemName": "HG"
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          },
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            "ParameterKey": "LAT_EARTH",
            "Description": "Heliographic latitude of the Earth",
            "Units": "rad",
            "CoordinateSystem": {
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            "ParameterKey": "LONG_SPACE",
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            "Units": "rad",
            "CoordinateSystem": {
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}