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                  "DataType": "CDF_REAL4"
                },
                {
                  "NumElements": 1
                },
                {
                  "NumDims": 2
                },
                {
                  "DimSizes": [
                    3,
                    3
                  ]
                },
                {
                  "RecVariance": "VARY"
                },
                {
                  "DimVariances": [
                    "VARY",
                    "VARY"
                  ]
                },
                {
                  "PadValue": -1e+30
                }
              ]
            },
            {
              "VarAttributes": [
                {
                  "CATDESC": "Covariance matrix in RTN coordinates (frame-independent), with standard errors given by the square root of the diagonal"
                },
                {
                  "FIELDNAM": "Proton Solar Wind Velocity Covariance (RTN)"
                },
                {
                  "FILLVAL": -1e+31
                },
                {
                  "FORMAT": "F19.3"
                },
                {
                  "LABLAXIS": "cov Vp"
                },
                {
                  "UNITS": "km^2/s^2"
                },
                {
                  "VALIDMIN": -100000000.0
                },
                {
                  "VALIDMAX": 100000000.0
                },
                {
                  "VAR_TYPE": "support_data"
                },
                {
                  "DEPEND_0": "epoch"
                },
                {
                  "LABL_PTR_1": "velocity_rtn_label"
                },
                {
                  "LABL_PTR_2": "velocity_rtn_label"
                }
              ]
            }
          ]
        },
        {
          "proton_sw_velocity_rtn_uncert": [
            {
              "VarDescription": [
                {
                  "DataType": "CDF_REAL4"
                },
                {
                  "NumElements": 1
                },
                {
                  "NumDims": 1
                },
                {
                  "DimSizes": [
                    3
                  ]
                },
                {
                  "RecVariance": "VARY"
                },
                {
                  "DimVariances": [
                    "VARY"
                  ]
                },
                {
                  "PadValue": -1e+30
                }
              ]
            },
            {
              "VarAttributes": [
                {
                  "CATDESC": "1-sigma standard error"
                },
                {
                  "FIELDNAM": "Proton Solar Wind Velocity Uncertainty (RTN)"
                },
                {
                  "FILLVAL": -1e+31
                },
                {
                  "FORMAT": "F19.3"
                },
                {
                  "LABLAXIS": "Vp RTN Err"
                },
                {
                  "SCALETYP": "linear"
                },
                {
                  "UNITS": "km/s"
                },
                {
                  "VALIDMIN": 0.0
                },
                {
                  "VALIDMAX": 10000.0
                },
                {
                  "VAR_TYPE": "support_data"
                },
                {
                  "DEPEND_0": "epoch"
                },
                {
                  "LABL_PTR_1": "velocity_rtn_label"
                }
              ]
            }
          ]
        },
        {
          "swp_flags": [
            {
              "VarDescription": [
                {
                  "DataType": "CDF_UINT2"
                },
                {
                  "NumElements": 1
                },
                {
                  "NumDims": 0
                },
                {
                  "RecVariance": "VARY"
                },
                {
                  "PadValue": 65534
                }
              ]
            },
            {
              "VarAttributes": [
                {
                  "CATDESC": "Quality flags for SWAPI L3a (caution required if nonzero)"
                },
                {
                  "FIELDNAM": "Quality Flags for SWAPI L3a"
                },
                {
                  "FILLVAL": 65535
                },
                {
                  "FORMAT": "I5"
                },
                {
                  "LABLAXIS": "Quality flags for SWAPI L3a"
                },
                {
                  "SCALETYP": "linear"
                },
                {
                  "UNITS": "0: okay; nonzero: caution"
                },
                {
                  "VALIDMIN": 0
                },
                {
                  "VALIDMAX": 65534
                },
                {
                  "VAR_TYPE": "data"
                },
                {
                  "DEPEND_0": "epoch"
                },
                {
                  "DISPLAY_TYPE": "time_series"
                },
                {
                  "VAR_NOTES": "Each bit corresponds to a specific potential concern. See release notes for details. Bit 2: Bad fit: fitting resulted in invalid values or large residuals. Bit 3: Fit error: fit failed to complete. Bit 4: preliminary MAG L1D was used for acquiring the magnetic field direction instead of the nominal MAG L2 product. All other bits are reserved."
                }
              ]
            }
          ]
        },
        {
          "velocity_rtn_label": [
            {
              "VarDescription": [
                {
                  "DataType": "CDF_CHAR"
                },
                {
                  "NumElements": 1
                },
                {
                  "NumDims": 1
                },
                {
                  "DimSizes": [
                    3
                  ]
                },
                {
                  "RecVariance": "NOVARY"
                },
                {
                  "DimVariances": [
                    "VARY"
                  ]
                },
                {
                  "NumWrittenRecords": 1
                },
                {
                  "PadValue": " "
                },
                {
                  "BlockingFactor": 1
                }
              ]
            },
            {
              "VarAttributes": [
                {
                  "CATDESC": "Label for Radial-Tangential-Normal (RTN) velocity components"
                },
                {
                  "FIELDNAM": "Velocity RTN Label"
                },
                {
                  "FILLVAL": " "
                },
                {
                  "FORMAT": "a20"
                },
                {
                  "VAR_TYPE": "metadata"
                }
              ]
            },
            {
              "VarData": [
                "R",
                "T",
                "N"
              ]
            }
          ]
        },
        {
          "proton_sw_velocity_rtn_label": [
            {
              "VarDescription": [
                {
                  "DataType": "CDF_CHAR"
                },
                {
                  "NumElements": 7
                },
                {
                  "NumDims": 1
                },
                {
                  "DimSizes": [
                    3
                  ]
                },
                {
                  "RecVariance": "NOVARY"
                },
                {
                  "DimVariances": [
                    "VARY"
                  ]
                },
                {
                  "NumWrittenRecords": 1
                },
                {
                  "PadValue": " "
                },
                {
                  "BlockingFactor": 1
                }
              ]
            },
            {
              "VarAttributes": [
                {
                  "CATDESC": "Label for Radial-Tangential-Normal (RTN) velocity components"
                },
                {
                  "FIELDNAM": "Velocity RTN Label"
                },
                {
                  "FILLVAL": " "
                },
                {
                  "FORMAT": "a20"
                },
                {
                  "VAR_TYPE": "metadata"
                }
              ]
            },
            {
              "VarData": [
                "Vp SC R",
                "Vp SC T",
                "Vp SC N"
              ]
            }
          ]
        },
        {
          "proton_sw_velocity_rtn_sun_label": [
            {
              "VarDescription": [
                {
                  "DataType": "CDF_CHAR"
                },
                {
                  "NumElements": 8
                },
                {
                  "NumDims": 1
                },
                {
                  "DimSizes": [
                    3
                  ]
                },
                {
                  "RecVariance": "NOVARY"
                },
                {
                  "DimVariances": [
                    "VARY"
                  ]
                },
                {
                  "NumWrittenRecords": 1
                },
                {
                  "PadValue": " "
                },
                {
                  "BlockingFactor": 1
                }
              ]
            },
            {
              "VarAttributes": [
                {
                  "CATDESC": "Label for Radial-Tangential-Normal (RTN) velocity components"
                },
                {
                  "FIELDNAM": "Velocity RTN Label"
                },
                {
                  "FILLVAL": " "
                },
                {
                  "FORMAT": "a20"
                },
                {
                  "VAR_TYPE": "metadata"
                }
              ]
            },
            {
              "VarData": [
                "Vp Sun R",
                "Vp Sun T",
                "Vp Sun N"
              ]
            }
          ]
        }
      ]
    }
  }
}