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      "type": "double",
      "x_cdf_DataType": "CDF_DOUBLE",
      "description": "ECEF Z-Component of meridional drift at Northern Footpoint",
      "fill": "-999.9",
      "units": "dimensionless",
      "x_label": "ICON_ANCILLARY_IVM_NORTH_FOOTPOINT_MER_ECEF_Z",
      "x_format": ".17g",
      "x_fractionDigits": "17",
      "x_cdf_FORMAT": "f8",
      "x_cdf_FIELDNAM": "Z-component of meridional drift",
      "x_cdf_DISPLAY_TYPE": "default_dimension",
      "x_cdf_DEPEND_0": "Epoch_cdf"
    },
    {
      "name": "ICON_L27_Footpoint_Meridional_Vector_ECEF_Z_South",
      "type": "double",
      "x_cdf_DataType": "CDF_DOUBLE",
      "description": "ECEF Z-Component of meridional drift at Southern Footpoint",
      "fill": "-999.9",
      "units": "dimensionless",
      "x_label": "ICON_ANCILLARY_IVM_SOUTH_FOOTPOINT_MER_ECEF_Z",
      "x_format": ".17g",
      "x_fractionDigits": "17",
      "x_cdf_FORMAT": "f8",
      "x_cdf_FIELDNAM": "Z-component of meridional drift",
      "x_cdf_DISPLAY_TYPE": "default_dimension",
      "x_cdf_DEPEND_0": "Epoch_cdf"
    },
    {
      "name": "ICON_L27_Footpoint_North_Ion_Velocity_North",
      "type": "double",
      "x_cdf_DataType": "CDF_DOUBLE",
      "description": "north_footpoint_north_drift",
      "fill": "NaN",
      "units": "m/s",
      "x_label": "north_footpoint_north_drift",
      "x_format": ".17g",
      "x_fractionDigits": "17",
      "x_cdf_FORMAT": "f8",
      "x_cdf_FIELDNAM": "north_footpoint_north_drift",
      "x_cdf_DISPLAY_TYPE": "default_dimension",
      "x_cdf_DEPEND_0": "Epoch_cdf"
    },
    {
      "name": "ICON_L27_Footpoint_North_Ion_Velocity_South",
      "type": "double",
      "x_cdf_DataType": "CDF_DOUBLE",
      "description": "south_footpoint_north_drift",
      "fill": "NaN",
      "units": "m/s",
      "x_label": "south_footpoint_north_drift",
      "x_format": ".17g",
      "x_fractionDigits": "17",
      "x_cdf_FORMAT": "f8",
      "x_cdf_FIELDNAM": "south_footpoint_north_drift",
      "x_cdf_DISPLAY_TYPE": "default_dimension",
      "x_cdf_DEPEND_0": "Epoch_cdf"
    },
    {
      "name": "ICON_L27_Footpoint_Up_Ion_Velocity_North",
      "type": "double",
      "x_cdf_DataType": "CDF_DOUBLE",
      "description": "north_footpoint_up_drift",
      "fill": "NaN",
      "units": "m/s",
      "x_label": "north_footpoint_up_drift",
      "x_format": ".17g",
      "x_fractionDigits": "17",
      "x_cdf_FORMAT": "f8",
      "x_cdf_FIELDNAM": "north_footpoint_up_drift",
      "x_cdf_DISPLAY_TYPE": "default_dimension",
      "x_cdf_DEPEND_0": "Epoch_cdf"
    },
    {
      "name": "ICON_L27_Footpoint_Up_Ion_Velocity_South",
      "type": "double",
      "x_cdf_DataType": "CDF_DOUBLE",
      "description": "south_footpoint_up_drift",
      "fill": "NaN",
      "units": "m/s",
      "x_label": "south_footpoint_up_drift",
      "x_format": ".17g",
      "x_fractionDigits": "17",
      "x_cdf_FORMAT": "f8",
      "x_cdf_FIELDNAM": "south_footpoint_up_drift",
      "x_cdf_DISPLAY_TYPE": "default_dimension",
      "x_cdf_DEPEND_0": "Epoch_cdf"
    },
    {
      "name": "ICON_L27_Footpoint_Zonal_Ion_Velocity_North",
      "type": "double",
      "x_cdf_DataType": "CDF_DOUBLE",
      "description": "Northern zonal ion velocity",
      "fill": "-999.9",
      "units": "m/s",
      "x_label": "Northern Zonal Ion Velocity",
      "x_format": ".17g",
      "x_fractionDigits": "17",
      "x_cdf_FORMAT": "f8",
      "x_cdf_FIELDNAM": "Northern Zonal Ion Velocity",
      "x_cdf_DISPLAY_TYPE": "default_dimension",
      "x_cdf_DEPEND_0": "Epoch_cdf"
    },
    {
      "name": "ICON_L27_Footpoint_Zonal_Ion_Velocity_South",
      "type": "double",
      "x_cdf_DataType": "CDF_DOUBLE",
      "description": "Southern zonal ion velocity",
      "fill": "-999.9",
      "units": "m/s",
      "x_label": "Southern Zonal Ion Velocity",
      "x_format": ".17g",
      "x_fractionDigits": "17",
      "x_cdf_FORMAT": "f8",
      "x_cdf_FIELDNAM": "Southern Zonal Ion Velocity",
      "x_cdf_DISPLAY_TYPE": "default_dimension",
      "x_cdf_DEPEND_0": "Epoch_cdf"
    },
    {
      "name": "ICON_L27_Footpoint_Zonal_Vector_ECEF_X_North",
      "type": "double",
      "x_cdf_DataType": "CDF_DOUBLE",
      "description": "ECEF X-Component of Zonal drift at Northern Footpoint",
      "fill": "-999.9",
      "units": "dimensionless",
      "x_label": "ICON_ANCILLARY_IVM_NORTH_FOOTPOINT_ZON_ECEF_X",
      "x_format": ".17g",
      "x_fractionDigits": "17",
      "x_cdf_FORMAT": "f8",
      "x_cdf_FIELDNAM": "X-component of zonal drift",
      "x_cdf_DISPLAY_TYPE": "default_dimension",
      "x_cdf_DEPEND_0": "Epoch_cdf"
    },
    {
      "name": "ICON_L27_Footpoint_Zonal_Vector_ECEF_X_South",
      "type": "double",
      "x_cdf_DataType": "CDF_DOUBLE",
      "description": "ECEF X-Component of Zonal drift at Southern Footpoint",
      "fill": "-999.9",
      "units": "dimensionless",
      "x_label": "ICON_ANCILLARY_IVM_SOUTH_FOOTPOINT_ZON_ECEF_X",
      "x_format": ".17g",
      "x_fractionDigits": "17",
      "x_cdf_FORMAT": "f8",
      "x_cdf_FIELDNAM": "X-component of zonal drift",
      "x_cdf_DISPLAY_TYPE": "default_dimension",
      "x_cdf_DEPEND_0": "Epoch_cdf"
    },
    {
      "name": "ICON_L27_Footpoint_Zonal_Vector_ECEF_Y_North",
      "type": "double",
      "x_cdf_DataType": "CDF_DOUBLE",
      "description": "ECEF Y-Component of Zonal drift at Northern Footpoint",
      "fill": "-999.9",
      "units": "dimensionless",
      "x_label": "ICON_ANCILLARY_IVM_NORTH_FOOTPOINT_ZON_ECEF_Y",
      "x_format": ".17g",
      "x_fractionDigits": "17",
      "x_cdf_FORMAT": "f8",
      "x_cdf_FIELDNAM": "Y-component of zonal drift",
      "x_cdf_DISPLAY_TYPE": "default_dimension",
      "x_cdf_DEPEND_0": "Epoch_cdf"
    },
    {
      "name": "ICON_L27_Footpoint_Zonal_Vector_ECEF_Y_South",
      "type": "double",
      "x_cdf_DataType": "CDF_DOUBLE",
      "description": "ECEF Y-Component of Zonal drift at Southern Footpoint",
      "fill": "-999.9",
      "units": "dimensionless",
      "x_label": "ICON_ANCILLARY_IVM_SOUTH_FOOTPOINT_ZON_ECEF_Y",
      "x_format": ".17g",
      "x_fractionDigits": "17",
      "x_cdf_FORMAT": "f8",
      "x_cdf_FIELDNAM": "Y-component of zonal drift",
      "x_cdf_DISPLAY_TYPE": "default_dimension",
      "x_cdf_DEPEND_0": "Epoch_cdf"
    },
    {
      "name": "ICON_L27_Footpoint_Zonal_Vector_ECEF_Z_North",
      "type": "double",
      "x_cdf_DataType": "CDF_DOUBLE",
      "description": "ECEF Z-Component of Zonal drift at Northern Footpoint",
      "fill": "-999.9",
      "units": "dimensionless",
      "x_label": "ICON_ANCILLARY_IVM_NORTH_FOOTPOINT_ZON_ECEF_Z",
      "x_format": ".17g",
      "x_fractionDigits": "17",
      "x_cdf_FORMAT": "f8",
      "x_cdf_FIELDNAM": "Z-component of zonal drift",
      "x_cdf_DISPLAY_TYPE": "default_dimension",
      "x_cdf_DEPEND_0": "Epoch_cdf"
    },
    {
      "name": "ICON_L27_Footpoint_Zonal_Vector_ECEF_Z_South",
      "type": "double",
      "x_cdf_DataType": "CDF_DOUBLE",
      "description": "ECEF Z-Component of Zonal drift at Southern Footpoint",
      "fill": "-999.9",
      "units": "dimensionless",
      "x_label": "ICON_ANCILLARY_IVM_SOUTH_FOOTPOINT_ZON_ECEF_Z",
      "x_format": ".17g",
      "x_fractionDigits": "17",
      "x_cdf_FORMAT": "f8",
      "x_cdf_FIELDNAM": "Z-component of zonal drift",
      "x_cdf_DISPLAY_TYPE": "default_dimension",
      "x_cdf_DEPEND_0": "Epoch_cdf"
    },
    {
      "name": "ICON_L27_Fractional_Ion_Density_H",
      "type": "double",
      "x_cdf_DataType": "CDF_DOUBLE",
      "description": "H+ fractional ion composition",
      "fill": "NaN",
      "units": " ",
      "x_label": "H+ Fractional Composition",
      "x_format": ".17g",
      "x_fractionDigits": "17",
      "x_cdf_FORMAT": "f8",
      "x_cdf_FIELDNAM": "H+ Fractional Composition",
      "x_cdf_DISPLAY_TYPE": "default_dimension",
      "x_cdf_DEPEND_0": "Epoch_cdf"
    },
    {
      "name": "ICON_L27_Fractional_Ion_Density_O",
      "type": "double",
      "x_cdf_DataType": "CDF_DOUBLE",
      "description": "O+ fractional ion composition",
      "fill": "NaN",
      "units": " ",
      "x_label": "O+ Fractional Composition",
      "x_format": ".17g",
      "x_fractionDigits": "17",
      "x_cdf_FORMAT": "f8",
      "x_cdf_FIELDNAM": "O+ Fractional Composition",
      "x_cdf_DISPLAY_TYPE": "default_dimension",
      "x_cdf_DEPEND_0": "Epoch_cdf"
    },
    {
      "name": "ICON_L27_IVM_Aperture_Potential",
      "type": "double",
      "x_cdf_DataType": "CDF_DOUBLE",
      "description": "Aperture plane potential",
      "fill": "NaN",
      "units": "V",
      "x_label": "Aperture plane plasma potential",
      "x_format": ".17g",
      "x_fractionDigits": "17",
      "x_cdf_FORMAT": "f8",
      "x_cdf_FIELDNAM": "Aperture plane plasma potential",
      "x_cdf_DISPLAY_TYPE": "default_dimension",
      "x_cdf_DEPEND_0": "Epoch_cdf"
    },
    {
      "name": "ICON_L27_Ion_Density",
      "type": "double",
      "x_cdf_DataType": "CDF_DOUBLE",
      "description": "Ion density",
      "fill": "NaN",
      "units": "N/cc",
      "x_label": "Ion Density",
      "x_format": ".17g",
      "x_fractionDigits": "17",
      "x_cdf_FORMAT": "f8",
      "x_cdf_FIELDNAM": "Ion Density",
      "x_cdf_DISPLAY_TYPE": "default_dimension",
      "x_cdf_DEPEND_0": "Epoch_cdf"
    },
    {
      "name": "ICON_L27_Ion_Temperature",
      "type": "double",
      "x_cdf_DataType": "CDF_DOUBLE",
      "description": "Ion temperature",
      "fill": "NaN",
      "units": "K",
      "x_label": "Ion Temperature",
      "x_format": ".17g",
      "x_fractionDigits": "17",
      "x_cdf_FORMAT": "f8",
      "x_cdf_FIELDNAM": "Ion Temperature",
      "x_cdf_DISPLAY_TYPE": "default_dimension",
      "x_cdf_DEPEND_0": "Epoch_cdf"
    },
    {
      "name": "ICON_L27_Ion_Velocity_East",
      "type": "double",
      "x_cdf_DataType": "CDF_DOUBLE",
      "description": "iv_east",
      "fill": "NaN",
      "units": "m/s",
      "x_label": "iv_east",
      "x_format": ".17g",
      "x_fractionDigits": "17",
      "x_cdf_FORMAT": "f8",
      "x_cdf_FIELDNAM": "iv_east",
      "x_cdf_DISPLAY_TYPE": "default_dimension",
      "x_cdf_DEPEND_0": "Epoch_cdf"
    },
    {
      "name": "ICON_L27_Ion_Velocity_Field_Aligned",
      "type": "double",
      "x_cdf_DataType": "CDF_DOUBLE",
      "description": "Field-Aligned ion velocity",
      "fill": "NaN",
      "units": "m/s",
      "x_label": "Field-Aligned Ion Velocity",
      "x_format": ".17g",
      "x_fractionDigits": "17",
      "x_cdf_FORMAT": "f8",
      "x_cdf_FIELDNAM": "Field-Aligned Ion Velocity",
      "x_cdf_DISPLAY_TYPE": "default_dimension",
      "x_cdf_DEPEND_0": "Epoch_cdf"
    },
    {
      "name": "ICON_L27_Ion_Velocity_Meridional",
      "type": "double",
      "x_cdf_DataType": "CDF_DOUBLE",
      "description": "Meridional ion velocity",
      "fill": "NaN",
      "units": "m/s",
      "x_label": "Meridional Ion Velocity",
      "x_format": ".17g",
      "x_fractionDigits": "17",
      "x_cdf_FORMAT": "f8",
      "x_cdf_FIELDNAM": "Meridional Ion Velocity",
      "x_cdf_DISPLAY_TYPE": "default_dimension",
      "x_cdf_DEPEND_0": "Epoch_cdf"
    },
    {
      "name": "ICON_L27_Ion_Velocity_North",
      "type": "double",
      "x_cdf_DataType": "CDF_DOUBLE",
      "description": "iv_north",
      "fill": "NaN",
      "units": "m/s",
      "x_label": "iv_north",
      "x_format": ".17g",
      "x_fractionDigits": "17",
      "x_cdf_FORMAT": "f8",
      "x_cdf_FIELDNAM": "iv_north",
      "x_cdf_DISPLAY_TYPE": "default_dimension",
      "x_cdf_DEPEND_0": "Epoch_cdf"
    },
    {
      "name": "ICON_L27_Ion_Velocity_Up",
      "type": "double",
      "x_cdf_DataType": "CDF_DOUBLE",
      "description": "iv_up",
      "fill": "NaN",
      "units": "m/s",
      "x_label": "iv_up",
      "x_format": ".17g",
      "x_fractionDigits": "17",
      "x_cdf_FORMAT": "f8",
      "x_cdf_FIELDNAM": "iv_up",
      "x_cdf_DISPLAY_TYPE": "default_dimension",
      "x_cdf_DEPEND_0": "Epoch_cdf"
    },
    {
      "name": "ICON_L27_Ion_Velocity_X",
      "type": "double",
      "x_cdf_DataType": "CDF_DOUBLE",
      "description": "Ion velocity along IVM-x",
      "fill": "NaN",
      "units": "m/s",
      "x_label": "Ion velocity along IVM-x",
      "x_format": ".17g",
      "x_fractionDigits": "17",
      "x_cdf_FORMAT": "f8",
      "x_cdf_FIELDNAM": "Ion velocity along IVM-x",
      "x_cdf_DISPLAY_TYPE": "default_dimension",
      "x_cdf_DEPEND_0": "Epoch_cdf"
    },
    {
      "name": "ICON_L27_Ion_Velocity_Y",
      "type": "double",
      "x_cdf_DataType": "CDF_DOUBLE",
      "description": "Ion velocity along IVM-y",
      "fill": "NaN",
      "units": "m/s",
      "x_label": "Ion velocity along IVM-y",
      "x_format": ".17g",
      "x_fractionDigits": "17",
      "x_cdf_FORMAT": "f8",
      "x_cdf_FIELDNAM": "Ion velocity along IVM-y",
      "x_cdf_DISPLAY_TYPE": "default_dimension",
      "x_cdf_DEPEND_0": "Epoch_cdf"
    },
    {
      "name": "ICON_L27_Ion_Velocity_Z",
      "type": "double",
      "x_cdf_DataType": "CDF_DOUBLE",
      "description": "Ion velocity along IVM-z",
      "fill": "NaN",
      "units": "m/s",
      "x_label": "Ion velocity along IVM-z",
      "x_format": ".17g",
      "x_fractionDigits": "17",
      "x_cdf_FORMAT": "f8",
      "x_cdf_FIELDNAM": "Ion velocity along IVM-z",
      "x_cdf_DISPLAY_TYPE": "default_dimension",
      "x_cdf_DEPEND_0": "Epoch_cdf"
    },
    {
      "name": "ICON_L27_Ion_Velocity_Zonal",
      "type": "double",
      "x_cdf_DataType": "CDF_DOUBLE",
      "description": "Zonal ion velocity",
      "fill": "NaN",
      "units": "m/s",
      "x_label": "Zonal Ion Velocity",
      "x_format": ".17g",
      "x_fractionDigits": "17",
      "x_cdf_FORMAT": "f8",
      "x_cdf_FIELDNAM": "Zonal Ion Velocity",
      "x_cdf_DISPLAY_TYPE": "default_dimension",
      "x_cdf_DEPEND_0": "Epoch_cdf"
    },
    {
      "name": "ICON_L27_Latitude",
      "type": "double",
      "x_cdf_DataType": "CDF_FLOAT",
      "description": "WGS84 Latitude of spacecraft position (geodetic)",
      "fill": "-999.900024",
      "units": "degrees North",
      "x_label": "ICON_ANCILLARY_IVM_LATITUDE",
      "x_format": ".7g",
      "x_fractionDigits": "7",
      "x_cdf_FORMAT": "f4",
      "x_cdf_FIELDNAM": "WGS84 Latitude of s/c position (geodetic)",
      "x_cdf_DISPLAY_TYPE": "default_dimension",
      "x_cdf_DEPEND_0": "Epoch_cdf"
    },
    {
      "name": "ICON_L27_Longitude",
      "type": "double",
      "x_cdf_DataType": "CDF_FLOAT",
      "description": "WGS84 Longitude of spacecraft position (geodetic)",
      "fill": "-999.900024",
      "units": "degrees East",
      "x_label": "ICON_ANCILLARY_IVM_LONGITUDE",
      "x_format": ".7g",
      "x_fractionDigits": "7",
      "x_cdf_FORMAT": "f4",
      "x_cdf_FIELDNAM": "WGS84 Longitude of s/c position (geodetic)",
      "x_cdf_DISPLAY_TYPE": "default_dimension",
      "x_cdf_DEPEND_0": "Epoch_cdf"
    },
    {
      "name": "ICON_L27_MTB_Status",
      "type": "double",
      "x_cdf_DataType": "CDF_DOUBLE",
      "description": "Flag for Magnetic Torquer Bars Acitve [1=ON 0=OFF]",
      "fill": "255.0",
      "units": "binary",
      "x_label": "ICON_ANCILLARY_IVM_MTB_STATUS",
      "x_format": ".17g",
      "x_fractionDigits": "17",
      "x_cdf_FORMAT": "f8",
      "x_cdf_FIELDNAM": "MTB Status [ON/OFF]",
      "x_cdf_DISPLAY_TYPE": "default_dimension",
      "x_cdf_DEPEND_0": "Epoch_cdf"
    },
    {
      "name": "ICON_L27_Magnetic_Latitude",
      "type": "double",
      "x_cdf_DataType": "CDF_FLOAT",
      "description": "Magnetic Latitude",
      "fill": "-999.900024",
      "units": "degrees North",
      "x_label": "ICON_ANCILLARY_IVM_MAGNETIC_LATITUDE",
      "x_format": ".7g",
      "x_fractionDigits": "7",
      "x_cdf_FORMAT": "f4",
      "x_cdf_FIELDNAM": "Magnetic Latitude of s/c position",
      "x_cdf_DISPLAY_TYPE": "default_dimension",
      "x_cdf_DEPEND_0": "Epoch_cdf"
    },
    {
      "name": "ICON_L27_Magnetic_Local_Time",
      "type": "double",
      "x_cdf_DataType": "CDF_FLOAT",
      "description": "Magnetic Local Time at s/c",
      "fill": "-999.900024",
      "units": "hour",
      "x_label": "ICON_ANCILLARY_IVM_SC_MLT",
      "x_format": ".7g",
      "x_fractionDigits": "7",
      "x_cdf_FORMAT": "f4",
      "x_cdf_FIELDNAM": "Magnetic Local Time at s/c",
      "x_cdf_DISPLAY_TYPE": "default_dimension",
      "x_cdf_DEPEND_0": "Epoch_cdf"
    },
    {
      "name": "ICON_L27_Magnetic_Longitude",
      "type": "double",
      "x_cdf_DataType": "CDF_FLOAT",
      "description": "Magnetic Longitude of s/c position",
      "fill": "-999.900024",
      "units": "degrees East",
      "x_label": "ICON_ANCILLARY_IVM_MAGNETIC_LONGITUDE",
      "x_format": ".7g",
      "x_fractionDigits": "7",
      "x_cdf_FORMAT": "f4",
      "x_cdf_FIELDNAM": "Magnetic Longitude of s/c position",
      "x_cdf_DISPLAY_TYPE": "default_dimension",
      "x_cdf_DEPEND_0": "Epoch_cdf"
    },
    {
      "name": "ICON_L27_Observatory_Corotation_X",
      "type": "double",
      "x_cdf_DataType": "CDF_FLOAT",
      "description": "ECI Earth Corotation Velocity Components in IVM Coordinates",
      "fill": "-999.900024",
      "units": "m/s",
      "x_label": "ICON_ANCILLARY_IVM_COROTATION",
      "x_format": ".7g",
      "x_fractionDigits": "7",
      "x_cdf_FORMAT": "f4",
      "x_cdf_FIELDNAM": "Earth Corotation Velocity",
      "x_cdf_DISPLAY_TYPE": "default_dimension",
      "x_cdf_DEPEND_0": "Epoch_cdf"
    },
    {
      "name": "ICON_L27_Observatory_Corotation_Y",
      "type": "double",
      "x_cdf_DataType": "CDF_FLOAT",
      "description": "ECI Earth Corotation Velocity Components in IVM Coordinates",
      "fill": "-999.900024",
      "units": "m/s",
      "x_label": "ICON_ANCILLARY_IVM_COROTATION",
      "x_format": ".7g",
      "x_fractionDigits": "7",
      "x_cdf_FORMAT": "f4",
      "x_cdf_FIELDNAM": "Earth Corotation Velocity",
      "x_cdf_DISPLAY_TYPE": "default_dimension",
      "x_cdf_DEPEND_0": "Epoch_cdf"
    },
    {
      "name": "ICON_L27_Observatory_Corotation_Z",
      "type": "double",
      "x_cdf_DataType": "CDF_FLOAT",
      "description": "ECI Earth Corotation Velocity Components in IVM Coordinates",
      "fill": "-999.900024",
      "units": "m/s",
      "x_label": "ICON_ANCILLARY_IVM_COROTATION",
      "x_format": ".7g",
      "x_fractionDigits": "7",
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