{
  "CDFFileInfo": {
    "FileVersion": "3.9.1",
    "Format": "SINGLE",
    "Majority": "COLUMN",
    "Encoding": "ARM_LITTLE",
    "checksum": "NONE",
    "LeapsecondLastUpdated": "2017-01-01"
  },
  "CDFglobalAttributes": {
    "Project": "ISTP>International Solar-Terrestrial Physics",
    "Discipline": "Space Physics>Heliospheric Science",
    "Logical_source": "wind_3dp_l3-eesa-low-sc-potential",
    "Logical_file_id": " ",
    "Source_name": "WIND>Wind Interplanetary Plasma Laboratory",
    "Data_type": "L3-EESA-LOW-SC-POTENTIAL>Spacecraft potential from 3DP EESA Low",
    "Descriptor": "3DP>Three-Dimensional Plasma and Energetic particle investigation for the Wind spacecraft",
    "TITLE": "Wind 3DP EESA Low Spacecraft Potential Database",
    "Mission_group": "Wind",
    "Instrument_type": "Particles (space)",
    "Logical_source_description": "Wind 3DP EESA Low Level 3 Spacecraft Potential Data",
    "Instrument_PI_name": "S.D. Bale",
    "Instrument_PI_affiliation": "University of California Berkeley SSL",
    "Project_PI_name": "L.B. Wilson III",
    "Project_PI_affiliation": "NASA/GSFC",
    "PI_name": "L.B. Wilson III",
    "PI_affiliation": "NASA/GSFC",
    "Acknowledgement": "We would like to thank the Wind/3DP and WAVES team for their support with data retrieval and calibration.",
    "Rules_of_use": "Please cite/reference the Wind review paper by L.B. Wilson et al., [2021] in Reviews of Geophysics and work by Wilson et al., [2023] in Astrophys. J. Suppl. when using this data.  There is also an erratum to the Wilson et al., [2023] ApJS, Wilson et al., [2026] ApJS, to which this data refers.",
    "Extended_Description": "This dataset contains spacecraft potential [eV] from the Wind/3DP EESA Low detector.  The dataset includes type labels for f(E) shape and solutions for four different methods used to determine phi_sc from f(E).  Please read the notes contained within these files and the documentation and description in Wilson et al., [2023] ApJS doi:10.3847/1538-4365/ad0633.  Please also see the erratum to Wilson et al., [2023] ApJS in Wilson et al., [2026] ApJS doi:10.3847/1538-4365/aea40c.",
    "def_FLAGS": [
      "TYPE_LABEL = C1 or C2 - Bad   :  (see notes in TEXT)",
      "TYPE_LABEL = B_ - Good  :  (see notes in TEXT)",
      "TYPE_LABEL = A_ - Best  :  (see notes in TEXT)"
    ],
    "TEXT": [
      "Spacecraft floating potential database from the Wind 3DP EESA Low velocity distribution functions (VDFs)",
      "TYPE_LABEL = A_ then the spacecraft potential is most reliable",
      "TYPE_LABEL = B_ is the second most reliable type label",
      "TYPE_LABEL = C1 is not reliable and should not be used",
      "TYPE_LABEL = C2 is not reliable and should not be used",
      "SCP_MINF is the easiest and often most reliable estimate for the spacecraft potential"
    ],
    "Data_version": " ",
    "File_naming_convention": "source_descriptor_datatype_yyyyMMdd",
    "LINK_TEXT": "Spacecraft potential measurements described in",
    "LINK_TITLE": "Wilson et al. [2026] ApJS",
    "HTTP_LINK": "https://doi.org/10.3847/1538-4365/aea40c"
  },
  "CDFVariables": {
    "EPOCH": {
      "VarDescription": {
        "DataType": "CDF_TIME_TT2000",
        "NumDims": 0,
        "NumElements": 1,
        "PadValue": "9999-12-31T23:59:59.999999999",
        "RecVariance": "VARY"
      },
      "VarAttributes": {
        "CATDESC": "Epoch (TT2000) time for each data point",
        "FIELDNAM": "Epoch",
        "FILLVAL": "9999-12-31T23:59:59.999999999",
        "FORMAT": "I22",
        "LABLAXIS": "Epoch",
        "SCALETYP": "LINEAR",
        "TIME_BASE": "J2000",
        "TIME_SCALE": "Terrestrial Time",
        "UNITS": "ns",
        "VALIDMAX": "2050-01-01T00:00:00.000000000",
        "VALIDMIN": "1994-11-01T23:59:59.999999999",
        "VAR_NOTES": "Epoch times are the mid-point time of each 3DP EL VDF",
        "VAR_TYPE": "support_data",
        "x_UNITS": "ns",
        "x_LABLAXIS": "Epoch"
      }
    },
    "Q_FLAG": {
      "VarDescription": {
        "DataType": "CDF_INT4",
        "NumDims": 0,
        "NumElements": 1,
        "PadValue": -1,
        "RecVariance": "VARY"
      },
      "VarAttributes": {
        "CATDESC": "Quality Flag of VDF shape [4=Best, 2=Good, 0=Bad]",
        "DEPEND_0": "EPOCH",
        "DISPLAY_TYPE": "default_dimensionscatter",
        "FIELDNAM": "Quality Flag",
        "FILLVAL": -1,
        "FORMAT": "I8",
        "LABLAXIS": "Quality Flag",
        "SCALETYP": "LINEAR",
        "UNITS": "4=Best,2=Good,0=Bad",
        "VALIDMAX": 4,
        "VALIDMIN": 0,
        "VAR_NOTES": "Quality flag of electron VDF shape [4 :  TYPE_LABEL = A_ = best; 2 :  TYPE_LABEL = B_ = Good; 0 :  TYPE_LABEL = C1 or C2 = Bad]",
        "VAR_TYPE": "data",
        "x_UNITS": "4=Best,2=Good,0=Bad",
        "x_LABLAXIS": "Quality Flag"
      }
    },
    "SCP_PCUR": {
      "VarDescription": {
        "DataType": "CDF_DOUBLE",
        "DimSizes": [
          2
        ],
        "DimVariances": [
          "VARY"
        ],
        "NumDims": 1,
        "NumElements": 1,
        "PadValue": -1e+31,
        "RecVariance": "VARY"
      },
      "VarAttributes": {
        "CATDESC": "The lower and upper bound of the spacecraft potential from positive curvature of f(E)",
        "DEPEND_0": "EPOCH",
        "DISPLAY_TYPE": "default_dimensionscatter",
        "FIELDNAM": "phi_sc from positive curvature",
        "FILLVAL": -1e+31,
        "FORMAT": "E14.6",
        "LABLAXIS": "phi_sc [Pos. Curv.]",
        "LABL_PTR_1": "PCUR_LAB",
        "SCALETYP": "LINEAR",
        "UNITS": "eV",
        "VALIDMAX": 30.0,
        "VALIDMIN": 3.0,
        "VAR_NOTES": "Spacecraft potential [eV] at the time of each 3DP VDF from the positive curvature of the 1D energy distribution, f(E)",
        "VAR_TYPE": "data",
        "x_UNITS": "eV",
        "x_LABLAXIS": "phi_sc [Pos. Curv.]",
        "x_LABLAXES": [
          [
            "low    [Pos. Curv.]",
            "upp    [Pos. Curv.]"
          ]
        ]
      }
    },
    "SCP_INFL": {
      "VarDescription": {
        "DataType": "CDF_DOUBLE",
        "DimSizes": [
          2
        ],
        "DimVariances": [
          "VARY"
        ],
        "NumDims": 1,
        "NumElements": 1,
        "PadValue": -1e+31,
        "RecVariance": "VARY"
      },
      "VarAttributes": {
        "CATDESC": "The lower and upper bound of the spacecraft potential from the point where df/dE changes from negative to positive",
        "DEPEND_0": "EPOCH",
        "DISPLAY_TYPE": "default_dimensionscatter",
        "FIELDNAM": "phi_sc from inflection point",
        "FILLVAL": -1e+31,
        "FORMAT": "E14.6",
        "LABLAXIS": "phi_sc [Infl. Point]",
        "LABL_PTR_1": "INFL_LAB",
        "SCALETYP": "LINEAR",
        "UNITS": "eV",
        "VALIDMAX": 30.0,
        "VALIDMIN": 3.0,
        "VAR_NOTES": "Spacecraft potential [eV] at the time of each 3DP VDF from the point where df/dE changes from negative to positive",
        "VAR_TYPE": "data",
        "x_UNITS": "eV",
        "x_LABLAXIS": "phi_sc [Infl. Point]",
        "x_LABLAXES": [
          [
            "low   [Infl. Point]",
            "upp   [Infl. Point]"
          ]
        ]
      }
    },
    "SCP_MNXC": {
      "VarDescription": {
        "DataType": "CDF_DOUBLE",
        "DimSizes": [
          2
        ],
        "DimVariances": [
          "VARY"
        ],
        "NumDims": 1,
        "NumElements": 1,
        "PadValue": -1e+31,
        "RecVariance": "VARY"
      },
      "VarAttributes": {
        "CATDESC": "The lower and upper bound of the spacecraft potential from the minimum and maximum of the curvature of f(E)",
        "DEPEND_0": "EPOCH",
        "DISPLAY_TYPE": "default_dimensionscatter",
        "FIELDNAM": "phi_sc from minimum and maximum of the curvature",
        "FILLVAL": -1e+31,
        "FORMAT": "E14.6",
        "LABLAXIS": "phi_sc [Min/Max Curv.]",
        "LABL_PTR_1": "MNXC_LAB",
        "SCALETYP": "LINEAR",
        "UNITS": "eV",
        "VALIDMAX": 30.0,
        "VALIDMIN": 3.0,
        "VAR_NOTES": "Spacecraft potential [eV] at the time of each 3DP VDF from the minimum and maximum of the curvature of f(E)",
        "VAR_TYPE": "data",
        "x_UNITS": "eV",
        "x_LABLAXIS": "phi_sc [Min/Max Curv.]",
        "x_LABLAXES": [
          [
            "low [Min/Max Curv.]",
            "upp [Min/Max Curv.]"
          ]
        ]
      }
    },
    "SCP_MINF": {
      "VarDescription": {
        "DataType": "CDF_DOUBLE",
        "NumDims": 0,
        "NumElements": 1,
        "PadValue": -1e+31,
        "RecVariance": "VARY"
      },
      "VarAttributes": {
        "CATDESC": "Spacecraft potential defining the lower and upper bound from the local minimum in f(E)",
        "DEPEND_0": "EPOCH",
        "DISPLAY_TYPE": "default_dimensionscatter",
        "FIELDNAM": "phi_sc from local minimum in f(E)",
        "FILLVAL": -1e+31,
        "FORMAT": "E14.6",
        "LABLAXIS": "phi_sc [Min f(E)]",
        "SCALETYP": "LINEAR",
        "UNITS": "eV",
        "VALIDMAX": 30.0,
        "VALIDMIN": 3.0,
        "VAR_NOTES": "Spacecraft potential [eV] at the time of each 3DP VDF from the local minimum in f(E) often seen as a kink-like feature",
        "VAR_TYPE": "data",
        "x_UNITS": "eV",
        "x_LABLAXIS": "phi_sc [Min f(E)]"
      }
    },
    "TYPE_LABEL": {
      "VarDescription": {
        "DataType": "CDF_CHAR",
        "NumDims": 0,
        "NumElements": 2,
        "PadValue": "__",
        "RecVariance": "VARY"
      },
      "VarAttributes": {
        "CATDESC": "Type Label defining the shape of f(E):  A_ = Best, B_ = Good, C1 or C2 = Bad [Wilson et al., 2023]",
        "DEPEND_0": "EPOCH",
        "FIELDNAM": "type label defining the shape of f(E)",
        "FILLVAL": "__",
        "FORMAT": "A2",
        "VAR_NOTES": "The type labels are defined in Wilson et al., [2023]",
        "VAR_TYPE": "metadata",
        "x_UNITS": null
      }
    },
    "PCUR_LAB": {
      "VarDescription": {
        "BlockingFactor": 1,
        "DataType": "CDF_CHAR",
        "DimSizes": [
          2
        ],
        "DimVariances": [
          "VARY"
        ],
        "NumDims": 1,
        "NumElements": 19,
        "NumWrittenRecords": 1,
        "PadValue": " ",
        "RecVariance": "NOVARY"
      },
      "VarAttributes": {
        "CATDESC": "Label for lower and upper bound on spacecraft potential",
        "FIELDNAM": "label for SCP_PCUR",
        "FORMAT": "A19",
        "VAR_TYPE": "metadata",
        "x_UNITS": null
      },
      "VarData": [
        "low    [Pos. Curv.]",
        "upp    [Pos. Curv.]"
      ]
    },
    "INFL_LAB": {
      "VarDescription": {
        "BlockingFactor": 1,
        "DataType": "CDF_CHAR",
        "DimSizes": [
          2
        ],
        "DimVariances": [
          "VARY"
        ],
        "NumDims": 1,
        "NumElements": 19,
        "NumWrittenRecords": 1,
        "PadValue": " ",
        "RecVariance": "NOVARY"
      },
      "VarAttributes": {
        "CATDESC": "Label for lower and upper bound on spacecraft potential",
        "FIELDNAM": "label for SCP_INFL",
        "FORMAT": "A19",
        "VAR_TYPE": "metadata",
        "x_UNITS": null
      },
      "VarData": [
        "low   [Infl. Point]",
        "upp   [Infl. Point]"
      ]
    },
    "MNXC_LAB": {
      "VarDescription": {
        "BlockingFactor": 1,
        "DataType": "CDF_CHAR",
        "DimSizes": [
          2
        ],
        "DimVariances": [
          "VARY"
        ],
        "NumDims": 1,
        "NumElements": 19,
        "NumWrittenRecords": 1,
        "PadValue": " ",
        "RecVariance": "NOVARY"
      },
      "VarAttributes": {
        "CATDESC": "Label for lower and upper bound on spacecraft potential",
        "FIELDNAM": "label for SCP_MNXC",
        "FORMAT": "A19",
        "VAR_TYPE": "metadata",
        "x_UNITS": null
      },
      "VarData": [
        "low [Min/Max Curv.]",
        "upp [Min/Max Curv.]"
      ]
    }
  }
}