{
  "startDate": "2015-09-01T00:00Z",
  "stopDate": "2026-01-31T12:57:11Z",
  "sampleStartDate": "2026-01-31T12:53:02Z",
  "sampleStopDate": "2026-01-31T12:55:01Z",
  "cadence": "PT0.624988S",
  "x_cadence_fraction": 0.37540453074433655,
  "x_cadence_note": "Counts based on variable 'Epoch' in https://cdaweb.gsfc.nasa.gov/sp_phys/data/mms/mms3/hpca/brst/l2/ion/2015/09/mms3_hpca_brst_l2_ion_20150901121114_v4.1.0.cdf. The most common cadence, 624988000 [ns] = PT0.624988S, occurred for 37.5405% of the 348 timesteps. ",
  "maxRequestDuration": "PT5950S",
  "resourceURL": "https://cdaweb.gsfc.nasa.gov/misc/NotesM.html#MMS3_HPCA_BRST_L2_ION",
  "contact": "J. Burch, S. Fuselier @ SWRI",
  "resourceID": "https://doi.org/10.48322/700m-dw30",
  "additionalMetadata": {
    "name": "SPASE",
    "contentURL": "https://spase-metadata.org/NASA/NumericalData/MMS/3/HotPlasmaCompositionAnalyzer/Burst/Level2/Ion/PT0.625S.html"
  },
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      "name": "Time",
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      "x_cdf_FIELDNAM": "Start Azimuth",
      "x_cdf_DEPEND_0": "Epoch"
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      "name": "mms3_hpca_science_mode",
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      "description": "Science Mode Value as defined in the HPCA Science Algorithm Document",
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      "x_cdf_FIELDNAM": "Science Mode Number",
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      "x_format": ".4e",
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            4,
            5,
            6,
            7,
            8,
            9,
            10,
            11,
            12,
            13,
            14,
            15
          ],
          "x_label": "Polar Anode Number",
          "units": "(0to15)"
        },
        {
          "name": "mms3_hpca_ion_energy",
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            6.9918,
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            26.233,
            30.948,
            36.531,
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            50.785,
            59.945,
            70.677,
            83.414,
            98.373,
            116.04,
            136.85,
            161.46,
            190.46,
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            264.98,
            312.57,
            368.72,
            434.95,
            513.06,
            605.2,
            713.87,
            842.05,
            993.32,
            1171.7,
            1382.1,
            1630.3,
            1923.1,
            2268.4,
            2675.8,
            3156.3,
            3723.1,
            4391.7,
            5180.4,
            6110.7,
            7208.1,
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            13955,
            16461,
            19418,
            22905,
            27018,
            31870,
            37593
          ],
          "x_label": "Energy",
          "units": "eV/q"
        }
      ]
    },
    {
      "name": "mms3_hpca_oplus_phase_space_density",
      "type": "double",
      "x_cdf_DataType": "CDF_REAL8",
      "description": "Oxygen+ Phase Space Density for all Elevation Anodes across all energies",
      "fill": "-1.0E31",
      "units": "cm^-6 s^3",
      "x_label": "O+ PSD",
      "x_format": ".4e",
      "x_fractionDigits": "4",
      "x_cdf_FORMAT": "E13.4",
      "x_cdf_FIELDNAM": "Oxygen+ PSD Energy vs Anode",
      "x_cdf_DISPLAY_TYPE": "default_dimensionTHUMBSIZE>60>xsz=4,ysz=7>x=mms3_hpca_polar_anode_number, y=mms3_hpca_ion_energy,z=mms3_hpca_hplus_phase_space_density",
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      "size": [
        16,
        63
      ],
      "bins": [
        {
          "name": "mms3_hpca_polar_anode_number_int2",
          "description": "Polar Anode Index Value",
          "centers": [
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            1,
            2,
            3,
            4,
            5,
            6,
            7,
            8,
            9,
            10,
            11,
            12,
            13,
            14,
            15
          ],
          "x_label": "Polar Anode Number",
          "units": "(0to15)"
        },
        {
          "name": "mms3_hpca_ion_energy",
          "description": "MMS3 HPCA: Electron Voltage associated with the ion counts.",
          "centers": [
            1.355,
            1.5718,
            1.8428,
            2.2222,
            2.6016,
            3.0894,
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            15.989,
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            22.276,
            26.233,
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            36.531,
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            83.414,
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            136.85,
            161.46,
            190.46,
            224.66,
            264.98,
            312.57,
            368.72,
            434.95,
            513.06,
            605.2,
            713.87,
            842.05,
            993.32,
            1171.7,
            1382.1,
            1630.3,
            1923.1,
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            2675.8,
            3156.3,
            3723.1,
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            16461,
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          "x_label": "Energy",
          "units": "eV/q"
        }
      ]
    },
    {
      "name": "mms3_hpca_B_GSE_sweep_avg",
      "type": "double",
      "x_cdf_DataType": "CDF_REAL4",
      "description": "Magnetic field vector in DMPA plus Btotal (8 or 16 S/s), Despun MPA-aligned cartesian coordinates",
      "fill": "-1.0E31",
      "units": "nT",
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      "x_labelComponents": [
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          "Bx GSE",
          "By GSE",
          "Bz GSE",
          "B Total"
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      ],
      "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": [
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      ]
    },
    {
      "name": "mms3_hpca_B_GSM_sweep_avg",
      "type": "double",
      "x_cdf_DataType": "CDF_REAL4",
      "description": "---> Magnetic field vector in GSM plus Btotal (8 or 16 S/s), Geocentric Solar Magnetospheric (GSM) cartesian coordinates",
      "fill": "-1.0E31",
      "units": "nT",
      "x_label": "B (GSM)",
      "x_labelComponents": [
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          "Bx GSM",
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          "Bz GSM",
          "B Total"
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      ],
      "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": "mms3_hpca_MCP_VMON_MIN_converted",
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      "x_cdf_DataType": "CDF_DOUBLE",
      "description": "LIMITS - MCP_VMON_MIN_converted",
      "fill": "1.0E31",
      "units": " ",
      "x_label": "MCP_VMON_MIN_conv",
      "x_format": ".4e",
      "x_fractionDigits": "4",
      "x_cdf_FORMAT": "e13.4",
      "x_cdf_FIELDNAM": "MCP_VMON_MIN_converted",
      "x_cdf_DISPLAY_TYPE": "default_dimension",
      "x_cdf_DEPEND_0": "Epoch"
    },
    {
      "name": "mms3_hpca_TOF_VMON_MIN_converted",
      "type": "double",
      "x_cdf_DataType": "CDF_DOUBLE",
      "description": "LIMITS - TOF_VMON_MIN_converted",
      "fill": "1.0E31",
      "units": " ",
      "x_label": "TOF_VMON_MIN_conv",
      "x_format": ".4e",
      "x_fractionDigits": "4",
      "x_cdf_FORMAT": "e13.4",
      "x_cdf_FIELDNAM": "TOF_VMON_MIN_converted",
      "x_cdf_DISPLAY_TYPE": "default_dimension",
      "x_cdf_DEPEND_0": "Epoch"
    },
    {
      "name": "mms3_hpca_decimation_factor_index",
      "type": "integer",
      "x_cdf_DataType": "CDF_UINT1",
      "description": "Decimation Factor Index from mode config file",
      "fill": "255",
      "units": " ",
      "x_label": "Dec. Indx",
      "x_cdf_FORMAT": "%d",
      "x_cdf_FIELDNAM": "SCI_DEC_FACTOR_TABLE_IDX",
      "x_cdf_DISPLAY_TYPE": "default_dimension",
      "x_cdf_DEPEND_0": "Epoch"
    }
  ],
  "x_info_author": "bw",
  "x_cdaweb_hapi_version": "20260130.0606",
  "x_info_caching": false,
  "status": {
    "code": 1200,
    "message": "OK"
  },
  "HAPI": "3.2",
  "x_LastUpdate": "2026-04-12T15:11:36Z"
}