{
  "startDate": "2015-09-01T00:00Z",
  "stopDate": "2026-02-14T23:59:40Z",
  "sampleStartDate": "2026-02-14T12:00:01Z",
  "sampleStopDate": "2026-02-14T17:59:41Z",
  "cadence": "PT9.999825S",
  "x_cadence_fraction": 0.15920398009950248,
  "x_cadence_note": "Counts based on variable 'Epoch' in https://cdaweb.gsfc.nasa.gov/sp_phys/data/mms/mms1/hpca/srvy/l2/moments/2015/09/mms1_hpca_srvy_l2_moments_20150901000000_v4.1.0.cdf. The most common cadence, 9999825000 [ns] = PT9.999825S, occurred for 15.9204% of the 32 timesteps. ",
  "maxRequestDuration": "PT1079000S",
  "resourceURL": "https://cdaweb.gsfc.nasa.gov/misc/NotesM.html#MMS1_HPCA_SRVY_L2_MOMENTS",
  "contact": "J. Burch, S. Fuselier @ SWRI",
  "resourceID": "https://doi.org/10.48322/xh05-q537",
  "additionalMetadata": {
    "name": "SPASE",
    "contentURL": "https://spase-metadata.org/NASA/NumericalData/MMS/1/HotPlasmaCompositionAnalyzer/Survey/Level2/Moments/PT10S.html"
  },
  "parameters": [
    {
      "name": "Time",
      "type": "isotime",
      "units": "UTC",
      "length": 30,
      "fill": null,
      "x_description": "Start time for the Spin",
      "x_cdf_NAME": "Epoch",
      "x_cdf_DataType": "CDF_TIME_TT2000"
    },
    {
      "name": "mms1_hpca_hplus_number_density",
      "type": "double",
      "x_cdf_DataType": "CDF_REAL8",
      "description": "Number Density Hydrogen+ for each HPCA half-spin",
      "fill": "-1.0E31",
      "units": "cm^-3",
      "x_label": "Number Dens H+",
      "x_format": ".4e",
      "x_fractionDigits": "4",
      "x_cdf_FORMAT": "E13.4",
      "x_cdf_FIELDNAM": "Number Density Hydrogen+",
      "x_cdf_DISPLAY_TYPE": "default_dimension",
      "x_cdf_DEPEND_0": "Epoch"
    },
    {
      "name": "mms1_hpca_hplus_ion_bulk_velocity",
      "type": "double",
      "x_cdf_DataType": "CDF_REAL8",
      "description": "---> Ion Bulk Velocity Hydrogen+ for each HPCA half-spin (x, y, z)",
      "fill": "-1.0E31",
      "units": "km/s",
      "x_label": "BulkV H+",
      "x_labelComponents": [
        [
          "BulkV H+ Xdbcs",
          "BulkV H+ Ydbcs",
          "BulkV H+ Zdbcs"
        ]
      ],
      "x_format": ".4e",
      "x_fractionDigits": "4",
      "x_cdf_FORMAT": "E13.4",
      "x_cdf_FIELDNAM": "Ion Bulk Velocity Hydrogen+",
      "x_cdf_DISPLAY_TYPE": "default_dimension",
      "x_cdf_DEPEND_0": "Epoch",
      "size": [
        3
      ]
    },
    {
      "name": "mms1_hpca_hplus_scalar_temperature",
      "type": "double",
      "x_cdf_DataType": "CDF_REAL8",
      "description": "---> Scalar Temperature Hydrogen+ for each HPCA half-spin",
      "fill": "-1.0E31",
      "units": "eV",
      "x_label": "Temp H+",
      "x_format": ".4e",
      "x_fractionDigits": "4",
      "x_cdf_FORMAT": "E13.4",
      "x_cdf_FIELDNAM": "Scalar Temperature Hydrogen+",
      "x_cdf_DISPLAY_TYPE": "default_dimension",
      "x_cdf_DEPEND_0": "Epoch"
    },
    {
      "name": "mms1_hpca_hplus_ion_pressure",
      "type": "double",
      "x_cdf_DataType": "CDF_REAL8",
      "description": "---> (no CDAWeb plots) Ion Pressure Tensor Hydrogen+ for each HPCA half-spin (xx,yx,zx,xy,yy,zy,xz,yz,zz)",
      "fill": "-1.0E31",
      "units": "nPa",
      "x_label": "P_H+",
      "x_labelComponents": [
        [
          "H+ Pxx/Pyx/Pzx DBCS",
          "H+ Pxy/Pyy/Pzy DBCS",
          "H+ Pxz/Pyz/Pzz DBCS"
        ],
        [
          "H+ Pxx/Pxy/Pxz DBCS",
          "H+ Pyx/Pyy/Pyz DBCS",
          "H+ Pzx/Pzy/Pzz DBCS"
        ]
      ],
      "x_format": ".4e",
      "x_fractionDigits": "4",
      "x_cdf_FORMAT": "E13.4",
      "x_cdf_DISPLAY_TYPE": "default_dimension",
      "x_cdf_DEPEND_0": "Epoch",
      "size": [
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        3
      ],
      "bins": [
        {
          "name": "index1",
          "description": "Index 1-3",
          "centers": [
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          ],
          "units": "*n"
        },
        {
          "name": "index2",
          "description": "Index 1-3",
          "centers": [
            1,
            2,
            3
          ],
          "units": "=n"
        }
      ]
    },
    {
      "name": "mms1_hpca_hplus_temperature_tensor",
      "type": "double",
      "x_cdf_DataType": "CDF_REAL8",
      "description": "---> (no CDAWeb plots) Ion Temp. Tensor Hydrogen+ for each HPCA half-spin (xx,yx,zx,xy,yy,zy,xz,yz,zz)",
      "fill": "-1.0E31",
      "units": "eV",
      "x_label": "T_H+",
      "x_format": ".4e",
      "x_fractionDigits": "4",
      "x_cdf_FORMAT": "E13.4",
      "x_cdf_FIELDNAM": "Ion Temp. Tensor Hydrogen+",
      "x_cdf_DISPLAY_TYPE": "default_dimension",
      "x_cdf_DEPEND_0": "Epoch",
      "size": [
        3,
        3
      ],
      "bins": [
        {
          "name": "index1",
          "description": "Index 1-3",
          "centers": [
            1,
            2,
            3
          ],
          "units": "*n"
        },
        {
          "name": "index2",
          "description": "Index 1-3",
          "centers": [
            1,
            2,
            3
          ],
          "units": "=n"
        }
      ]
    },
    {
      "name": "mms1_hpca_heplus_number_density",
      "type": "double",
      "x_cdf_DataType": "CDF_REAL8",
      "description": "Number Density Helium+ for each HPCA half-spin",
      "fill": "-1.0E31",
      "units": "cm^-3",
      "x_label": "Number Dens He+",
      "x_format": ".4e",
      "x_fractionDigits": "4",
      "x_cdf_FORMAT": "E13.4",
      "x_cdf_FIELDNAM": "Number Density Helium+",
      "x_cdf_DISPLAY_TYPE": "default_dimension",
      "x_cdf_DEPEND_0": "Epoch"
    },
    {
      "name": "mms1_hpca_heplus_ion_bulk_velocity",
      "type": "double",
      "x_cdf_DataType": "CDF_REAL8",
      "description": "---> Ion Bulk Velocity Helium+ for each HPCA half-spin (x, y, z)",
      "fill": "-1.0E31",
      "units": "km/s",
      "x_label": "BulkV_He+",
      "x_labelComponents": [
        [
          "BulkV He+ Xdbcs",
          "BulkV He+ Ydbcs",
          "BulkV He+ Zdbcs"
        ]
      ],
      "x_format": ".4e",
      "x_fractionDigits": "4",
      "x_cdf_FORMAT": "E13.4",
      "x_cdf_FIELDNAM": "Ion Bulk Velocity Helium+",
      "x_cdf_DISPLAY_TYPE": "default_dimension",
      "x_cdf_DEPEND_0": "Epoch",
      "size": [
        3
      ]
    },
    {
      "name": "mms1_hpca_heplus_scalar_temperature",
      "type": "double",
      "x_cdf_DataType": "CDF_REAL8",
      "description": "---> Scalar Temperature Helium+ for each HPCA half-spin",
      "fill": "-1.0E31",
      "units": "eV",
      "x_label": "Temp He+",
      "x_format": ".4e",
      "x_fractionDigits": "4",
      "x_cdf_FORMAT": "E13.4",
      "x_cdf_FIELDNAM": "Scalar Temperature Helium+",
      "x_cdf_DISPLAY_TYPE": "default_dimension",
      "x_cdf_DEPEND_0": "Epoch"
    },
    {
      "name": "mms1_hpca_heplus_ion_pressure",
      "type": "double",
      "x_cdf_DataType": "CDF_REAL8",
      "description": "---> (no CDAWeb plots) Ion Pressure Tensor Helium+ for each HPCA half-spin (xx,yx,zx,xy,yy,zy,xz,yz,zz)",
      "fill": "-1.0E31",
      "units": "nPa",
      "x_label": "p_He+",
      "x_format": ".4e",
      "x_fractionDigits": "4",
      "x_cdf_FORMAT": "E13.4",
      "x_cdf_FIELDNAM": "Ion Pressure Tensor Helium+",
      "x_cdf_DISPLAY_TYPE": "default_dimension",
      "x_cdf_DEPEND_0": "Epoch",
      "size": [
        3,
        3
      ],
      "bins": [
        {
          "name": "index1",
          "description": "Index 1-3",
          "centers": [
            1,
            2,
            3
          ],
          "units": "*n"
        },
        {
          "name": "index2",
          "description": "Index 1-3",
          "centers": [
            1,
            2,
            3
          ],
          "units": "=n"
        }
      ]
    },
    {
      "name": "mms1_hpca_heplus_temperature_tensor",
      "type": "double",
      "x_cdf_DataType": "CDF_REAL8",
      "description": "---> (no CDAWeb plots) Ion Temp. Tensor Helium+ for each HPCA half-spin (xx,yx,zx,xy,yy,zy,xz,yz,zz)",
      "fill": "-1.0E31",
      "units": "eV",
      "x_label": "T_He+",
      "x_format": ".4e",
      "x_fractionDigits": "4",
      "x_cdf_FORMAT": "E13.4",
      "x_cdf_FIELDNAM": "Ion Temp. Tensor Helium+",
      "x_cdf_DISPLAY_TYPE": "default_dimension",
      "x_cdf_DEPEND_0": "Epoch",
      "size": [
        3,
        3
      ],
      "bins": [
        {
          "name": "index1",
          "description": "Index 1-3",
          "centers": [
            1,
            2,
            3
          ],
          "units": "*n"
        },
        {
          "name": "index2",
          "description": "Index 1-3",
          "centers": [
            1,
            2,
            3
          ],
          "units": "=n"
        }
      ]
    },
    {
      "name": "mms1_hpca_heplusplus_number_density",
      "type": "double",
      "x_cdf_DataType": "CDF_REAL8",
      "description": "Number Density Helium++ for each HPCA half-spin",
      "fill": "-1.0E31",
      "units": "cm^-3",
      "x_label": "Number Dens He++",
      "x_format": ".4e",
      "x_fractionDigits": "4",
      "x_cdf_FORMAT": "E13.4",
      "x_cdf_FIELDNAM": "Number Density Helium++",
      "x_cdf_DISPLAY_TYPE": "default_dimension",
      "x_cdf_DEPEND_0": "Epoch"
    },
    {
      "name": "mms1_hpca_heplusplus_ion_bulk_velocity",
      "type": "double",
      "x_cdf_DataType": "CDF_REAL8",
      "description": "---> Ion Bulk Velocity Helium++ for each HPCA half-spin (x, y, z)",
      "fill": "-1.0E31",
      "units": "km/s",
      "x_label": "BulkV He++",
      "x_labelComponents": [
        [
          "BulkV He++ Xdbcs",
          "BulkV He++ Ydbcs",
          "BulkV He++ Zdbcs"
        ]
      ],
      "x_format": ".4e",
      "x_fractionDigits": "4",
      "x_cdf_FORMAT": "E13.4",
      "x_cdf_FIELDNAM": "Ion Bulk Velocity Helium++",
      "x_cdf_DISPLAY_TYPE": "default_dimension",
      "x_cdf_DEPEND_0": "Epoch",
      "size": [
        3
      ]
    },
    {
      "name": "mms1_hpca_heplusplus_scalar_temperature",
      "type": "double",
      "x_cdf_DataType": "CDF_REAL8",
      "description": "---> Scalar Temperature Helium++ for each HPCA half-spin",
      "fill": "-1.0E31",
      "units": "eV",
      "x_label": "Temp He++",
      "x_format": ".4e",
      "x_fractionDigits": "4",
      "x_cdf_FORMAT": "E13.4",
      "x_cdf_FIELDNAM": "Scalar Temperature Helium++",
      "x_cdf_DISPLAY_TYPE": "default_dimension",
      "x_cdf_DEPEND_0": "Epoch"
    },
    {
      "name": "mms1_hpca_heplusplus_ion_pressure",
      "type": "double",
      "x_cdf_DataType": "CDF_REAL8",
      "description": "---> (no CDAWeb plots) Ion Pressure Tensor Helium++ for each HPCA half-spin (xx,yx,zx,xy,yy,zy,xz,yz,zz)",
      "fill": "-1.0E31",
      "units": "nPa",
      "x_label": "p_He++",
      "x_format": ".4e",
      "x_fractionDigits": "4",
      "x_cdf_FORMAT": "E13.4",
      "x_cdf_FIELDNAM": "Ion Pressure Tensor Helium++",
      "x_cdf_DISPLAY_TYPE": "default_dimension",
      "x_cdf_DEPEND_0": "Epoch",
      "size": [
        3,
        3
      ],
      "bins": [
        {
          "name": "index1",
          "description": "Index 1-3",
          "centers": [
            1,
            2,
            3
          ],
          "units": "*n"
        },
        {
          "name": "index2",
          "description": "Index 1-3",
          "centers": [
            1,
            2,
            3
          ],
          "units": "=n"
        }
      ]
    },
    {
      "name": "mms1_hpca_heplusplus_temperature_tensor",
      "type": "double",
      "x_cdf_DataType": "CDF_REAL8",
      "description": "---> (no CDAWeb plots) Ion Temp. Tensor Helium++ for each HPCA half-spin (xx,yx,zx,xy,yy,zy,xz,yz,zz)",
      "fill": "-1.0E31",
      "units": "eV",
      "x_label": "T_He++",
      "x_format": ".4e",
      "x_fractionDigits": "4",
      "x_cdf_FORMAT": "E13.4",
      "x_cdf_FIELDNAM": "Ion Temp. Tensor Helium++",
      "x_cdf_DISPLAY_TYPE": "default_dimension",
      "x_cdf_DEPEND_0": "Epoch",
      "size": [
        3,
        3
      ],
      "bins": [
        {
          "name": "index1",
          "description": "Index 1-3",
          "centers": [
            1,
            2,
            3
          ],
          "units": "*n"
        },
        {
          "name": "index2",
          "description": "Index 1-3",
          "centers": [
            1,
            2,
            3
          ],
          "units": "=n"
        }
      ]
    },
    {
      "name": "mms1_hpca_oplus_number_density",
      "type": "double",
      "x_cdf_DataType": "CDF_REAL8",
      "description": "Number Density Oxygen+ for each HPCA half-spin",
      "fill": "-1.0E31",
      "units": "cm^-3",
      "x_label": "Number Dens O+",
      "x_format": ".4e",
      "x_fractionDigits": "4",
      "x_cdf_FORMAT": "E13.4",
      "x_cdf_FIELDNAM": "Number Density Oxygen+",
      "x_cdf_DISPLAY_TYPE": "default_dimension",
      "x_cdf_DEPEND_0": "Epoch"
    },
    {
      "name": "mms1_hpca_oplus_ion_bulk_velocity",
      "type": "double",
      "x_cdf_DataType": "CDF_REAL8",
      "description": "---> Ion Bulk Velocity Oxygen+ for each HPCA half-spin (x, y, z)",
      "fill": "-1.0E31",
      "units": "km/s",
      "x_label": "BulkV_O+",
      "x_labelComponents": [
        [
          "BulkV O+ Xdbcs",
          "BulkV O+ Ydbcs",
          "BulkV O+ Zdbcs"
        ]
      ],
      "x_format": ".4e",
      "x_fractionDigits": "4",
      "x_cdf_FORMAT": "E13.4",
      "x_cdf_FIELDNAM": "Ion Bulk Velocity Oxygen+",
      "x_cdf_DISPLAY_TYPE": "default_dimension",
      "x_cdf_DEPEND_0": "Epoch",
      "size": [
        3
      ]
    },
    {
      "name": "mms1_hpca_oplus_scalar_temperature",
      "type": "double",
      "x_cdf_DataType": "CDF_REAL8",
      "description": "---> Scalar Temperature Oxygen+ for each HPCA half-spin",
      "fill": "-1.0E31",
      "units": "eV",
      "x_label": "Temp O+",
      "x_format": ".4e",
      "x_fractionDigits": "4",
      "x_cdf_FORMAT": "E13.4",
      "x_cdf_FIELDNAM": "Scalar Temperature Oxygen+",
      "x_cdf_DISPLAY_TYPE": "default_dimension",
      "x_cdf_DEPEND_0": "Epoch"
    },
    {
      "name": "mms1_hpca_oplus_ion_pressure",
      "type": "double",
      "x_cdf_DataType": "CDF_REAL8",
      "description": "---> (no CDAWeb plots) Ion Pressure Tensor Oxygen+ for each HPCA half-spin (xx,yx,zx,xy,yy,zy,xz,yz,zz)",
      "fill": "-1.0E31",
      "units": "nPa",
      "x_label": "p_O+",
      "x_format": ".4e",
      "x_fractionDigits": "4",
      "x_cdf_FORMAT": "E13.4",
      "x_cdf_FIELDNAM": "Ion Pressure Tensor Oxygen+",
      "x_cdf_DISPLAY_TYPE": "default_dimension",
      "x_cdf_DEPEND_0": "Epoch",
      "size": [
        3,
        3
      ],
      "bins": [
        {
          "name": "index1",
          "description": "Index 1-3",
          "centers": [
            1,
            2,
            3
          ],
          "units": "*n"
        },
        {
          "name": "index2",
          "description": "Index 1-3",
          "centers": [
            1,
            2,
            3
          ],
          "units": "=n"
        }
      ]
    },
    {
      "name": "mms1_hpca_oplus_temperature_tensor",
      "type": "double",
      "x_cdf_DataType": "CDF_REAL8",
      "description": "---> (no CDAWeb plots) Ion Temp. Tensor Oxygen+ for each HPCA half-spin (xx,yx,zx,xy,yy,zy,xz,yz,zz)",
      "fill": "-1.0E31",
      "units": "eV",
      "x_label": "T_O+",
      "x_format": ".4e",
      "x_fractionDigits": "4",
      "x_cdf_FORMAT": "E13.4",
      "x_cdf_FIELDNAM": "Ion Temp. Tensor Oxygen+",
      "x_cdf_DISPLAY_TYPE": "default_dimension",
      "x_cdf_DEPEND_0": "Epoch",
      "size": [
        3,
        3
      ],
      "bins": [
        {
          "name": "index1",
          "description": "Index 1-3",
          "centers": [
            1,
            2,
            3
          ],
          "units": "*n"
        },
        {
          "name": "index2",
          "description": "Index 1-3",
          "centers": [
            1,
            2,
            3
          ],
          "units": "=n"
        }
      ]
    },
    {
      "name": "mms1_hpca_B_GSE_spin_avg",
      "type": "double",
      "x_cdf_DataType": "CDF_REAL4",
      "description": "Magnetic field vector in DMPA plus Btotal (8 or 16 S/s) for each HPCA half-spin (x, y, z, total)",
      "fill": "-1.0E31",
      "units": "nT",
      "x_label": "B (DMPA)",
      "x_labelComponents": [
        [
          "Bx DMPA",
          "By DMPA",
          "Bz DMPA",
          "Btotal"
        ]
      ],
      "x_format": ".5e",
      "x_fractionDigits": "5",
      "x_cdf_FORMAT": "E13.5",
      "x_cdf_FIELDNAM": "Magnetic field vector in DMPA plus Btotal (8 or 16 S/s)",
      "x_cdf_DISPLAY_TYPE": "default_dimension",
      "x_cdf_DEPEND_0": "Epoch",
      "size": [
        4
      ]
    },
    {
      "name": "mms1_hpca_B_GSM_spin_avg",
      "type": "double",
      "x_cdf_DataType": "CDF_REAL4",
      "description": "---> Magnetic field vector in GSM plus Btotal (8 or 16 S/s) for each HPCA half-spin (x, y, z, total)",
      "fill": "-1.0E31",
      "units": "nT",
      "x_label": "B (GSM)",
      "x_labelComponents": [
        [
          "Bx GSM",
          "By GSM",
          "Bz GSM",
          "Btotal"
        ]
      ],
      "x_format": ".5e",
      "x_fractionDigits": "5",
      "x_cdf_FORMAT": "E13.5",
      "x_cdf_FIELDNAM": "Magnetic field vector in GSM plus Btotal (8 or 16 S/s)",
      "x_cdf_DISPLAY_TYPE": "default_dimension",
      "x_cdf_DEPEND_0": "Epoch",
      "size": [
        4
      ]
    },
    {
      "name": "mms1_hpca_hplus_ion_bulk_velocity_GSM",
      "type": "double",
      "x_cdf_DataType": "CDF_REAL8",
      "description": "Bulk Velocity in GSM for H+ for each HPCA half-spin (x, y, z)",
      "fill": "-1.0E31",
      "units": "km/s",
      "x_label": "BulkV_H+ (GSM)",
      "x_labelComponents": [
        [
          "BulkV H+ Xgsm",
          "BulkV H+ Ygsm",
          "BulkV H+ Zgsm"
        ]
      ],
      "x_format": ".4e",
      "x_fractionDigits": "4",
      "x_cdf_FORMAT": "E13.4",
      "x_cdf_FIELDNAM": "Bulk Velocity in GSM for H+",
      "x_cdf_DISPLAY_TYPE": "default_dimension",
      "x_cdf_DEPEND_0": "Epoch",
      "size": [
        3
      ]
    },
    {
      "name": "mms1_hpca_hplus_tperp",
      "type": "double",
      "x_cdf_DataType": "CDF_REAL8",
      "description": "---> Tperp H+ for each HPCA half-spin",
      "fill": "-1.0E31",
      "units": "eV",
      "x_label": "Tperp H+",
      "x_format": ".4e",
      "x_fractionDigits": "4",
      "x_cdf_FORMAT": "E13.4",
      "x_cdf_FIELDNAM": "Tperp H+",
      "x_cdf_DISPLAY_TYPE": "default_dimension",
      "x_cdf_DEPEND_0": "Epoch"
    },
    {
      "name": "mms1_hpca_hplus_tparallel",
      "type": "double",
      "x_cdf_DataType": "CDF_REAL8",
      "description": "---> Tparallel H+ for each HPCA half-spin",
      "fill": "-1.0E31",
      "units": "eV",
      "x_label": "Tparallel H+",
      "x_format": ".4e",
      "x_fractionDigits": "4",
      "x_cdf_FORMAT": "E13.4",
      "x_cdf_FIELDNAM": "Tparallel H+",
      "x_cdf_DISPLAY_TYPE": "default_dimension",
      "x_cdf_DEPEND_0": "Epoch"
    },
    {
      "name": "mms1_hpca_hplus_vperp",
      "type": "double",
      "x_cdf_DataType": "CDF_REAL8",
      "description": "---> Vperp vector plus Magnitude for H+ for each HPCA half-spin (x, y, z, total)",
      "fill": "-1.0E31",
      "units": "km/s",
      "x_label": "Vperp_H+",
      "x_labelComponents": [
        [
          "Vperp H+ Xdbcs",
          "Vperp H+ Ydbcs",
          "Vperp H+ Zdbcs",
          "Vperp H+ Total"
        ]
      ],
      "x_format": ".4e",
      "x_fractionDigits": "4",
      "x_cdf_FORMAT": "E13.4",
      "x_cdf_FIELDNAM": "Vperp vector plus Magnitude for H+",
      "x_cdf_DISPLAY_TYPE": "default_dimension",
      "x_cdf_DEPEND_0": "Epoch",
      "size": [
        4
      ]
    },
    {
      "name": "mms1_hpca_hplus_vparallel",
      "type": "double",
      "x_cdf_DataType": "CDF_REAL8",
      "description": "---> Vparallel vector plus Magnitude for H+ for each HPCA half-spin (x, y, z, total)",
      "fill": "-1.0E31",
      "units": "km/s",
      "x_label": "V||_H+",
      "x_labelComponents": [
        [
          "Vparallel H+ Xdbcs",
          "Vparallel H+ Ydbcs",
          "Vparallel H+ Zdbcs",
          "Vparallel H+ Total"
        ]
      ],
      "x_format": ".4e",
      "x_fractionDigits": "4",
      "x_cdf_FORMAT": "E13.4",
      "x_cdf_FIELDNAM": "Vparallel vector plus Magnitude for H+",
      "x_cdf_DISPLAY_TYPE": "default_dimension",
      "x_cdf_DEPEND_0": "Epoch",
      "size": [
        4
      ]
    },
    {
      "name": "mms1_hpca_hplus_vperp_GSM",
      "type": "double",
      "x_cdf_DataType": "CDF_REAL8",
      "description": "---> Vperp vector plus Magnitude in GSM for H+ for each HPCA half-spin (x, y, z, total)",
      "fill": "-1.0E31",
      "units": "km/s",
      "x_label": "Vperp_H+ (GSM)",
      "x_labelComponents": [
        [
          "Vperp H+ Xgsm",
          "Vperp H+ Ygsm",
          "Vperp H+ Zgsm",
          "Vperp H+ Total"
        ]
      ],
      "x_format": ".4e",
      "x_fractionDigits": "4",
      "x_cdf_FORMAT": "E13.4",
      "x_cdf_FIELDNAM": "Vperp vector plus Magnitude in GSM for H+",
      "x_cdf_DISPLAY_TYPE": "default_dimension",
      "x_cdf_DEPEND_0": "Epoch",
      "size": [
        4
      ]
    },
    {
      "name": "mms1_hpca_hplus_vparallel_GSM",
      "type": "double",
      "x_cdf_DataType": "CDF_REAL8",
      "description": "---> Vparallel vector plus Magnitude in GSM for H+ for each HPCA half-spin (x, y, z, total)",
      "fill": "-1.0E31",
      "units": "km/s",
      "x_label": "V||_H+ (GSM)",
      "x_labelComponents": [
        [
          "Vparallel H+ Xgsm",
          "Vparallel H+ Ygsm",
          "Vparallel H+ Zgsm",
          "Vparallel H+ Total"
        ]
      ],
      "x_format": ".4e",
      "x_fractionDigits": "4",
      "x_cdf_FORMAT": "E13.4",
      "x_cdf_FIELDNAM": "Vparallel vector plus Magnitude in GSM for H+",
      "x_cdf_DISPLAY_TYPE": "default_dimension",
      "x_cdf_DEPEND_0": "Epoch",
      "size": [
        4
      ]
    },
    {
      "name": "mms1_hpca_heplus_ion_bulk_velocity_GSM",
      "type": "double",
      "x_cdf_DataType": "CDF_REAL8",
      "description": "Bulk Velocity in GSM for He+ for each HPCA half-spin (x, y, z)",
      "fill": "-1.0E31",
      "units": "km/s",
      "x_label": "BulkV_He+ (GSM)",
      "x_labelComponents": [
        [
          "BulkV He+ Xgsm",
          "BulkV He+ Ygsm",
          "BulkV He+ Zgsm"
        ]
      ],
      "x_format": ".4e",
      "x_fractionDigits": "4",
      "x_cdf_FORMAT": "E13.4",
      "x_cdf_FIELDNAM": "Bulk Velocity in GSM for He+",
      "x_cdf_DISPLAY_TYPE": "default_dimension",
      "x_cdf_DEPEND_0": "Epoch",
      "size": [
        3
      ]
    },
    {
      "name": "mms1_hpca_heplus_tperp",
      "type": "double",
      "x_cdf_DataType": "CDF_REAL8",
      "description": "---> Tperp He+ for each HPCA half-spin",
      "fill": "-1.0E31",
      "units": "eV",
      "x_label": "Tperp He+",
      "x_format": ".4e",
      "x_fractionDigits": "4",
      "x_cdf_FORMAT": "E13.4",
      "x_cdf_FIELDNAM": "Tperp He+",
      "x_cdf_DISPLAY_TYPE": "default_dimension",
      "x_cdf_DEPEND_0": "Epoch"
    },
    {
      "name": "mms1_hpca_heplus_tparallel",
      "type": "double",
      "x_cdf_DataType": "CDF_REAL8",
      "description": "---> Tparallel He+ for each HPCA half-spin",
      "fill": "-1.0E31",
      "units": "eV",
      "x_label": "Tparallel He+",
      "x_format": ".4e",
      "x_fractionDigits": "4",
      "x_cdf_FORMAT": "E13.4",
      "x_cdf_FIELDNAM": "Tparallel He+",
      "x_cdf_DISPLAY_TYPE": "default_dimension",
      "x_cdf_DEPEND_0": "Epoch"
    },
    {
      "name": "mms1_hpca_heplus_vperp",
      "type": "double",
      "x_cdf_DataType": "CDF_REAL8",
      "description": "---> Vperp vector plus Magnitude for He+ for each HPCA half-spin (x, y, z, total)",
      "fill": "-1.0E31",
      "units": "km/s",
      "x_label": "Vperp_He+",
      "x_labelComponents": [
        [
          "Vperp He+ Xdbcs",
          "Vperp He+ Ydbcs",
          "Vperp He+ Zdbcs",
          "Vperp He+ Total"
        ]
      ],
      "x_format": ".4e",
      "x_fractionDigits": "4",
      "x_cdf_FORMAT": "E13.4",
      "x_cdf_FIELDNAM": "Vperp vector plus Magnitude for He+",
      "x_cdf_DISPLAY_TYPE": "default_dimension",
      "x_cdf_DEPEND_0": "Epoch",
      "size": [
        4
      ]
    },
    {
      "name": "mms1_hpca_heplus_vparallel",
      "type": "double",
      "x_cdf_DataType": "CDF_REAL8",
      "description": "---> Vparallel vector plus Magnitude for He+ for each HPCA half-spin (x, y, z, total)",
      "fill": "-1.0E31",
      "units": "km/s",
      "x_label": "V||_He+",
      "x_labelComponents": [
        [
          "Vparallel He+ Xdbcs",
          "Vparallel He+ Ydbcs",
          "Vparallel He+ Zdbcs",
          "Vparallel He+ Total"
        ]
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      "x_format": ".4e",
      "x_fractionDigits": "4",
      "x_cdf_FORMAT": "E13.4",
      "x_cdf_FIELDNAM": "Vparallel vector plus Magnitude for He+",
      "x_cdf_DISPLAY_TYPE": "default_dimension",
      "x_cdf_DEPEND_0": "Epoch",
      "size": [
        4
      ]
    },
    {
      "name": "mms1_hpca_heplus_vperp_GSM",
      "type": "double",
      "x_cdf_DataType": "CDF_REAL8",
      "description": "---> Vperp vector plus Magnitude in GSM for He+ for each HPCA half-spin (x, y, z, total)",
      "fill": "-1.0E31",
      "units": "km/s",
      "x_label": "Vperp_He+ (GSM)",
      "x_labelComponents": [
        [
          "Vperp He+ Xgsm",
          "Vperp He+ Ygsm",
          "Vperp He+ Zgsm",
          "Vperp He+ Total"
        ]
      ],
      "x_format": ".4e",
      "x_fractionDigits": "4",
      "x_cdf_FORMAT": "E13.4",
      "x_cdf_FIELDNAM": "Vperp vector plus Magnitude in GSM for He+",
      "x_cdf_DISPLAY_TYPE": "default_dimension",
      "x_cdf_DEPEND_0": "Epoch",
      "size": [
        4
      ]
    },
    {
      "name": "mms1_hpca_heplus_vparallel_GSM",
      "type": "double",
      "x_cdf_DataType": "CDF_REAL8",
      "description": "---> Vparallel vector plus Magnitude in GSM for He+ for each HPCA half-spin (x, y, z, total)",
      "fill": "-1.0E31",
      "units": "km/s",
      "x_label": "V||_He+ (GSM)",
      "x_labelComponents": [
        [
          "Vparallel He+ Xgsm",
          "Vparallel He+ Ygsm",
          "Vparallel He+ Zgsm",
          "Vparallel He+ Total"
        ]
      ],
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      "x_fractionDigits": "4",
      "x_cdf_FORMAT": "E13.4",
      "x_cdf_FIELDNAM": "Vparallel vector plus Magnitude in GSM for He+",
      "x_cdf_DISPLAY_TYPE": "default_dimension",
      "x_cdf_DEPEND_0": "Epoch",
      "size": [
        4
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    },
    {
      "name": "mms1_hpca_heplusplus_ion_bulk_velocity_GSM",
      "type": "double",
      "x_cdf_DataType": "CDF_REAL8",
      "description": "Bulk Velocity in GSM for He++ for each HPCA half-spin (x, y, z)",
      "fill": "-1.0E31",
      "units": "km/s",
      "x_label": "BulkV_He++ (GSM)",
      "x_labelComponents": [
        [
          "BulkV He++ Xgsm",
          "BulkV He++ Ygsm",
          "BulkV He++ Zgsm"
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      ],
      "x_format": ".4e",
      "x_fractionDigits": "4",
      "x_cdf_FORMAT": "E13.4",
      "x_cdf_FIELDNAM": "Bulk Velocity in GSM for He++",
      "x_cdf_DISPLAY_TYPE": "default_dimension",
      "x_cdf_DEPEND_0": "Epoch",
      "size": [
        3
      ]
    },
    {
      "name": "mms1_hpca_heplusplus_tperp",
      "type": "double",
      "x_cdf_DataType": "CDF_REAL8",
      "description": "---> Tperp He++ for each HPCA half-spin",
      "fill": "-1.0E31",
      "units": "eV",
      "x_label": "Tperp He++",
      "x_format": ".4e",
      "x_fractionDigits": "4",
      "x_cdf_FORMAT": "E13.4",
      "x_cdf_FIELDNAM": "Tperp He++",
      "x_cdf_DISPLAY_TYPE": "default_dimension",
      "x_cdf_DEPEND_0": "Epoch"
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    {
      "name": "mms1_hpca_heplusplus_tparallel",
      "type": "double",
      "x_cdf_DataType": "CDF_REAL8",
      "description": "---> Tparallel He++ for each HPCA half-spin",
      "fill": "-1.0E31",
      "units": "eV",
      "x_label": "Tparallel He++",
      "x_format": ".4e",
      "x_fractionDigits": "4",
      "x_cdf_FORMAT": "E13.4",
      "x_cdf_FIELDNAM": "Tparallel He++",
      "x_cdf_DISPLAY_TYPE": "default_dimension",
      "x_cdf_DEPEND_0": "Epoch"
    },
    {
      "name": "mms1_hpca_heplusplus_vperp",
      "type": "double",
      "x_cdf_DataType": "CDF_REAL8",
      "description": "Vperp vector plus Magnitude for He++ for each HPCA half-spin (x, y, z, total)",
      "fill": "-1.0E31",
      "units": "km/s",
      "x_label": "Vperp_He++",
      "x_labelComponents": [
        [
          "Vperp He++ Xdbcs",
          "Vperp He++ Ydbcs",
          "Vperp He++ Zdbcs",
          "Vperp He++ Total"
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      "x_format": ".4e",
      "x_fractionDigits": "4",
      "x_cdf_FORMAT": "E13.4",
      "x_cdf_FIELDNAM": "Vperp vector plus Magnitude for He++",
      "x_cdf_DISPLAY_TYPE": "default_dimension",
      "x_cdf_DEPEND_0": "Epoch",
      "size": [
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    {
      "name": "mms1_hpca_heplusplus_vparallel",
      "type": "double",
      "x_cdf_DataType": "CDF_REAL8",
      "description": "---> Vparallel vector plus Magnitude for He++ for each HPCA half-spin (x, y, z, total)",
      "fill": "-1.0E31",
      "units": "km/s",
      "x_label": "V||_He++",
      "x_labelComponents": [
        [
          "Vparallel He++ Xdbcs",
          "Vparallel He++ Ydbcs",
          "Vparallel He++ Zdbcs",
          "Vparallel He++ Total"
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      "x_format": ".4e",
      "x_fractionDigits": "4",
      "x_cdf_FORMAT": "E13.4",
      "x_cdf_FIELDNAM": "Vparallel vector plus Magnitude for He++",
      "x_cdf_DISPLAY_TYPE": "default_dimension",
      "x_cdf_DEPEND_0": "Epoch",
      "size": [
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    },
    {
      "name": "mms1_hpca_heplusplus_vperp_GSM",
      "type": "double",
      "x_cdf_DataType": "CDF_REAL8",
      "description": "Vperp vector plus Magnitude in GSM for He++ for each HPCA half-spin (x, y, z, total)",
      "fill": "-1.0E31",
      "units": "km/s",
      "x_label": "Vperp_He++ (GSM)",
      "x_labelComponents": [
        [
          "Vperp He++ Xgsm",
          "Vperp He++ Ygsm",
          "Vperp He++ Zgsm",
          "Vperp He++ Total"
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      "x_format": ".4e",
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      "x_cdf_FORMAT": "E13.4",
      "x_cdf_FIELDNAM": "Vperp vector plus Magnitude in GSM for He++",
      "x_cdf_DISPLAY_TYPE": "default_dimension",
      "x_cdf_DEPEND_0": "Epoch",
      "size": [
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    },
    {
      "name": "mms1_hpca_heplusplus_vparallel_GSM",
      "type": "double",
      "x_cdf_DataType": "CDF_REAL8",
      "description": "Vparallel vector plus Magnitude in GSM for He++ for each HPCA half-spin (x, y, z, total)",
      "fill": "-1.0E31",
      "units": "km/s",
      "x_label": "V||_He++ (GSM)",
      "x_labelComponents": [
        [
          "Vparallel He++ Xgsm",
          "Vparallel He++ Ygsm",
          "Vparallel He++ Zgsm",
          "Vparallel He++ Total"
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      "x_format": ".4e",
      "x_fractionDigits": "4",
      "x_cdf_FORMAT": "E13.4",
      "x_cdf_FIELDNAM": "Vparallel vector plus Magnitude in GSM for He++",
      "x_cdf_DISPLAY_TYPE": "default_dimension",
      "x_cdf_DEPEND_0": "Epoch",
      "size": [
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      ]
    },
    {
      "name": "mms1_hpca_oplus_ion_bulk_velocity_GSM",
      "type": "double",
      "x_cdf_DataType": "CDF_REAL8",
      "description": "Bulk Velocity in GSM for O+ for each HPCA half-spin (x, y, z)",
      "fill": "-1.0E31",
      "units": "km/s",
      "x_label": "BulkV_O+ (GSM)",
      "x_labelComponents": [
        [
          "BulkV O+ Xgsm",
          "BulkV O+ Ygsm",
          "BulkV O+ Zgsm"
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      "x_fractionDigits": "4",
      "x_cdf_FORMAT": "E13.4",
      "x_cdf_FIELDNAM": "Bulk Velocity in GSM for O+",
      "x_cdf_DISPLAY_TYPE": "default_dimension",
      "x_cdf_DEPEND_0": "Epoch",
      "size": [
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    {
      "name": "mms1_hpca_oplus_tperp",
      "type": "double",
      "x_cdf_DataType": "CDF_REAL8",
      "description": "---> Tperp O+ for each HPCA half-spin",
      "fill": "-1.0E31",
      "units": "eV",
      "x_label": "Tperp O+",
      "x_format": ".4e",
      "x_fractionDigits": "4",
      "x_cdf_FORMAT": "E13.4",
      "x_cdf_FIELDNAM": "Tperp O+",
      "x_cdf_DISPLAY_TYPE": "default_dimension",
      "x_cdf_DEPEND_0": "Epoch"
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    {
      "name": "mms1_hpca_oplus_tparallel",
      "type": "double",
      "x_cdf_DataType": "CDF_REAL8",
      "description": "---> Tparallel O+ for each HPCA half-spin",
      "fill": "-1.0E31",
      "units": "eV",
      "x_label": "Tparallel O+",
      "x_format": ".4e",
      "x_fractionDigits": "4",
      "x_cdf_FORMAT": "E13.4",
      "x_cdf_FIELDNAM": "Tparallel O+",
      "x_cdf_DISPLAY_TYPE": "default_dimension",
      "x_cdf_DEPEND_0": "Epoch"
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      "x_cdf_DataType": "CDF_REAL8",
      "description": "---> Vperp vector plus Magnitude for O+ for each HPCA half-spin (x, y, z, total)",
      "fill": "-1.0E31",
      "units": "km/s",
      "x_label": "Vperp_O+",
      "x_labelComponents": [
        [
          "Vperp O+ Xdbcs",
          "Vperp O+ Ydbcs",
          "Vperp O+ Zdbcs",
          "Vperp O+ Total"
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      "x_format": ".4e",
      "x_fractionDigits": "4",
      "x_cdf_FORMAT": "E13.4",
      "x_cdf_FIELDNAM": "Vperp vector plus Magnitude for O+",
      "x_cdf_DISPLAY_TYPE": "default_dimension",
      "x_cdf_DEPEND_0": "Epoch",
      "size": [
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      ]
    },
    {
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      "x_cdf_DataType": "CDF_REAL8",
      "description": "---> Vparallel vector plus Magnitude for O+ for each HPCA half-spin (x, y, z, total)",
      "fill": "-1.0E31",
      "units": "km/s",
      "x_label": "V||_O+",
      "x_labelComponents": [
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          "Vparallel O+ Xdbcs",
          "Vparallel O+ Ydbcs",
          "Vparallel O+ Zdbcs",
          "Vparallel O+ Total"
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      "x_cdf_FORMAT": "E13.4",
      "x_cdf_FIELDNAM": "Vparallel vector plus Magnitude for O+",
      "x_cdf_DISPLAY_TYPE": "default_dimension",
      "x_cdf_DEPEND_0": "Epoch",
      "size": [
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      "x_cdf_DataType": "CDF_REAL8",
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      "fill": "-1.0E31",
      "units": "km/s",
      "x_label": "Vperp_O+ (GSM)",
      "x_labelComponents": [
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          "Vperp O+ Ygsm",
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          "Vperp O+ Total"
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      "x_cdf_FIELDNAM": "Vperp vector plus Magnitude in GSM for O+",
      "x_cdf_DISPLAY_TYPE": "default_dimension",
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      "size": [
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      "units": "km/s",
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      "x_cdf_FIELDNAM": "Vparallel vector plus Magnitude in GSM for O+",
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      "name": "mms1_hpca_MCP_VMON_MIN_converted",
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      "description": "LIMITS - MCP_VMON_MIN_converted",
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      "units": " ",
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      "x_cdf_FORMAT": "e13.4",
      "x_cdf_FIELDNAM": "MCP_VMON_MIN_converted",
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      "x_cdf_DEPEND_0": "Epoch"
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    {
      "name": "mms1_hpca_TOF_VMON_MIN_converted",
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      "x_cdf_DataType": "CDF_DOUBLE",
      "description": "LIMITS - TOF_VMON_MIN_converted",
      "fill": "1.0E31",
      "units": " ",
      "x_label": "TOF_VMON_MIN_conv",
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      "x_cdf_FORMAT": "e13.4",
      "x_cdf_FIELDNAM": "TOF_VMON_MIN_converted",
      "x_cdf_DISPLAY_TYPE": "default_dimension",
      "x_cdf_DEPEND_0": "Epoch"
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  ],
  "x_info_author": "bw",
  "x_cdaweb_hapi_version": "20260130.0606",
  "x_info_caching": false,
  "status": {
    "code": 1200,
    "message": "OK"
  },
  "HAPI": "3.2",
  "x_LastUpdate": "2026-04-12T15:11:17Z"
}