{
  "startDate": "2015-09-01T00:00Z",
  "stopDate": "2026-01-19T23:59:58Z",
  "sampleStartDate": "2026-01-18T00:00Z",
  "sampleStopDate": "2026-01-18T23:59:59Z",
  "cadence": "PT2.4192S",
  "x_cadence_fraction": 0.09574063911520114,
  "x_cadence_note": "Counts based on variable 'epoch' in https://cdaweb.gsfc.nasa.gov/sp_phys/data/mms/mms3/feeps/srvy/l2/ion/2015/09/mms3_feeps_srvy_l2_ion_20150901000000_v7.1.1.cdf. The most common cadence, 2419200000 [ns] = PT2.4192S, occurred for 9.5741% of the 2268 timesteps. ",
  "maxRequestDuration": "PT4319950S",
  "resourceURL": "https://cdaweb.gsfc.nasa.gov/misc/NotesM.html#MMS3_FEEPS_SRVY_L2_ION",
  "contact": "STP @ LASP",
  "resourceID": "https://doi.org/10.48322/50ck-w733",
  "additionalMetadata": {
    "name": "SPASE",
    "contentURL": "https://spase-metadata.org/NASA/NumericalData/MMS/3/EnergeticParticleDetector/FEEPS/Survey/Level2/Ion/PT2.42S.html"
  },
  "parameters": [
    {
      "name": "Time",
      "type": "isotime",
      "units": "UTC",
      "length": 30,
      "fill": null,
      "x_description": "UTC timestamp at sector center",
      "x_cdf_NAME": "epoch",
      "x_cdf_DataType": "CDF_TIME_TT2000"
    },
    {
      "name": "mms3_epd_feeps_srvy_l2_ion_top_quality_indicator_sensorid_6",
      "type": "integer",
      "x_cdf_DataType": "CDF_INT4",
      "description": "Quality Indicator (0=VALID FOR SCIENCE, 1=CAUTION, 2=PROBLEMATIC, 3=NOT VALID FOR SCIENCE, 4=CALIBRATION) sensor 6",
      "fill": "-2147483648",
      "units": " ",
      "x_label": "TOP SIDE QUALITY INDICATOR sensor 6",
      "x_cdf_FORMAT": "I20",
      "x_cdf_FIELDNAM": "srvy_l2_ion_top_quality_indicator_sensorid_6 ",
      "x_cdf_DISPLAY_TYPE": "default_dimension",
      "x_cdf_DEPEND_0": "epoch"
    },
    {
      "name": "mms3_epd_feeps_srvy_l2_ion_top_quality_indicator_sensorid_7",
      "type": "integer",
      "x_cdf_DataType": "CDF_INT4",
      "description": "Quality Indicator (0=VALID FOR SCIENCE, 1=CAUTION, 2=PROBLEMATIC, 3=NOT VALID FOR SCIENCE, 4=CALIBRATION) sensor 7",
      "fill": "-2147483648",
      "units": " ",
      "x_label": "TOP SIDE QUALITY INDICATOR sensor 7",
      "x_cdf_FORMAT": "I20",
      "x_cdf_FIELDNAM": "srvy_l2_ion_top_quality_indicator_sensorid_7 ",
      "x_cdf_DISPLAY_TYPE": "default_dimension",
      "x_cdf_DEPEND_0": "epoch"
    },
    {
      "name": "mms3_epd_feeps_srvy_l2_ion_top_quality_indicator_sensorid_8",
      "type": "integer",
      "x_cdf_DataType": "CDF_INT4",
      "description": "Quality Indicator (0=VALID FOR SCIENCE, 1=CAUTION, 2=PROBLEMATIC, 3=NOT VALID FOR SCIENCE, 4=CALIBRATION) sensor 8",
      "fill": "-2147483648",
      "units": " ",
      "x_label": "TOP SIDE QUALITY INDICATOR sensor 8",
      "x_cdf_FORMAT": "I20",
      "x_cdf_FIELDNAM": "srvy_l2_ion_top_quality_indicator_sensorid_8 ",
      "x_cdf_DISPLAY_TYPE": "default_dimension",
      "x_cdf_DEPEND_0": "epoch"
    },
    {
      "name": "mms3_epd_feeps_srvy_l2_ion_bottom_quality_indicator_sensorid_6",
      "type": "integer",
      "x_cdf_DataType": "CDF_INT4",
      "description": "Quality Indicator (0=VALID FOR SCIENCE, 1=CAUTION, 2=PROBLEMATIC, 3=NOT VALID FOR SCIENCE, 4=CALIBRATION) sensor 6",
      "fill": "-2147483648",
      "units": " ",
      "x_label": "BOTTOM SIDE QUALITY INDICATOR sensor 6",
      "x_cdf_FORMAT": "I20",
      "x_cdf_FIELDNAM": "srvy_l2_ion_bottom_quality_indicator_sensorid_6 ",
      "x_cdf_DISPLAY_TYPE": "default_dimension",
      "x_cdf_DEPEND_0": "epoch"
    },
    {
      "name": "mms3_epd_feeps_srvy_l2_ion_bottom_quality_indicator_sensorid_7",
      "type": "integer",
      "x_cdf_DataType": "CDF_INT4",
      "description": "Quality Indicator (0=VALID FOR SCIENCE, 1=CAUTION, 2=PROBLEMATIC, 3=NOT VALID FOR SCIENCE, 4=CALIBRATION) sensor 7",
      "fill": "-2147483648",
      "units": " ",
      "x_label": "BOTTOM SIDE QUALITY INDICATOR sensor 7",
      "x_cdf_FORMAT": "I20",
      "x_cdf_FIELDNAM": "srvy_l2_ion_bottom_quality_indicator_sensorid_7 ",
      "x_cdf_DISPLAY_TYPE": "default_dimension",
      "x_cdf_DEPEND_0": "epoch"
    },
    {
      "name": "mms3_epd_feeps_srvy_l2_ion_bottom_quality_indicator_sensorid_8",
      "type": "integer",
      "x_cdf_DataType": "CDF_INT4",
      "description": "Quality Indicator (0=VALID FOR SCIENCE, 1=CAUTION, 2=PROBLEMATIC, 3=NOT VALID FOR SCIENCE, 4=CALIBRATION) sensor 8",
      "fill": "-2147483648",
      "units": " ",
      "x_label": "BOTTOM SIDE QUALITY INDICATOR sensor 8",
      "x_cdf_FORMAT": "I20",
      "x_cdf_FIELDNAM": "srvy_l2_ion_bottom_quality_indicator_sensorid_8 ",
      "x_cdf_DISPLAY_TYPE": "default_dimension",
      "x_cdf_DEPEND_0": "epoch"
    },
    {
      "name": "mms3_epd_feeps_srvy_l2_ion_top_count_rate_sensorid_6",
      "type": "double",
      "x_cdf_DataType": "CDF_DOUBLE",
      "description": "MMS3 FEEPS top side survey mode ion count rate sensor 6",
      "fill": "-1.0E31",
      "units": "counts/s",
      "x_label": "Count rate top sensor 6",
      "x_labelComponents": [
        [
          "CH_1",
          "CH_2",
          "CH_3",
          "CH_4",
          "CH_5",
          "CH_6",
          "CH_7",
          "CH_8",
          "CH_9",
          "CH_10",
          "CH_11",
          "CH_12",
          "CH_13",
          "CH_14",
          "CH_15",
          "CH_16"
        ]
      ],
      "x_format": ".3f",
      "x_fractionDigits": "3",
      "x_cdf_FORMAT": "F20.3",
      "x_cdf_FIELDNAM": "srvy_l2_ion_top_count_rate_sensorid_6 ",
      "x_cdf_DISPLAY_TYPE": "default_dimension",
      "x_cdf_DEPEND_0": "epoch",
      "size": [
        16
      ],
      "bins": [
        {
          "name": "mms3_epd_feeps_srvy_l2_ion_top_energy_centroid_sensorid_6",
          "description": "Centroid of differential energy channels associated with each of 16 FEEPS channels sensor 6",
          "centers": [
            61.795,
            76.305,
            94.775,
            113.245,
            133.035,
            154.145,
            177.89,
            205.595,
            237.255,
            274.195,
            316.41,
            363.905,
            419.315,
            483.96,
            557.835,
            610.605
          ],
          "x_label": "Diffential energy channel centroid top sensor 6",
          "x_labelComponents": [
            [
              "CH_1",
              "CH_2",
              "CH_3",
              "CH_4",
              "CH_5",
              "CH_6",
              "CH_7",
              "CH_8",
              "CH_9",
              "CH_10",
              "CH_11",
              "CH_12",
              "CH_13",
              "CH_14",
              "CH_15",
              "CH_16"
            ]
          ],
          "units": "keV"
        }
      ]
    },
    {
      "name": "mms3_epd_feeps_srvy_l2_ion_top_count_rate_sensorid_7",
      "type": "double",
      "x_cdf_DataType": "CDF_DOUBLE",
      "description": "MMS3 FEEPS top side survey mode ion count rate sensor 7",
      "fill": "-1.0E31",
      "units": "counts/s",
      "x_label": "Count rate top sensor 7",
      "x_labelComponents": [
        [
          "CH_1",
          "CH_2",
          "CH_3",
          "CH_4",
          "CH_5",
          "CH_6",
          "CH_7",
          "CH_8",
          "CH_9",
          "CH_10",
          "CH_11",
          "CH_12",
          "CH_13",
          "CH_14",
          "CH_15",
          "CH_16"
        ]
      ],
      "x_format": ".3f",
      "x_fractionDigits": "3",
      "x_cdf_FORMAT": "F20.3",
      "x_cdf_FIELDNAM": "srvy_l2_ion_top_count_rate_sensorid_7 ",
      "x_cdf_DISPLAY_TYPE": "default_dimension",
      "x_cdf_DEPEND_0": "epoch",
      "size": [
        16
      ],
      "bins": [
        {
          "name": "mms3_epd_feeps_srvy_l2_ion_top_energy_centroid_sensorid_7",
          "description": "Centroid of differential energy channels associated with each of 16 FEEPS channels sensor 7",
          "centers": [
            62.18,
            76.925,
            95.705,
            114.475,
            133.245,
            153.355,
            177.495,
            205.65,
            236.49,
            272.69,
            315.6,
            363.865,
            420.185,
            484.55,
            558.295,
            606.565
          ],
          "x_label": "Diffential energy channel centroid top sensor 7",
          "x_labelComponents": [
            [
              "CH_1",
              "CH_2",
              "CH_3",
              "CH_4",
              "CH_5",
              "CH_6",
              "CH_7",
              "CH_8",
              "CH_9",
              "CH_10",
              "CH_11",
              "CH_12",
              "CH_13",
              "CH_14",
              "CH_15",
              "CH_16"
            ]
          ],
          "units": "keV"
        }
      ]
    },
    {
      "name": "mms3_epd_feeps_srvy_l2_ion_top_count_rate_sensorid_8",
      "type": "double",
      "x_cdf_DataType": "CDF_DOUBLE",
      "description": "MMS3 FEEPS top side survey mode ion count rate sensor 8",
      "fill": "-1.0E31",
      "units": "counts/s",
      "x_label": "Count rate top sensor 8",
      "x_labelComponents": [
        [
          "CH_1",
          "CH_2",
          "CH_3",
          "CH_4",
          "CH_5",
          "CH_6",
          "CH_7",
          "CH_8",
          "CH_9",
          "CH_10",
          "CH_11",
          "CH_12",
          "CH_13",
          "CH_14",
          "CH_15",
          "CH_16"
        ]
      ],
      "x_format": ".3f",
      "x_fractionDigits": "3",
      "x_cdf_FORMAT": "F20.3",
      "x_cdf_FIELDNAM": "srvy_l2_ion_top_count_rate_sensorid_8 ",
      "x_cdf_DISPLAY_TYPE": "default_dimension",
      "x_cdf_DEPEND_0": "epoch",
      "size": [
        16
      ],
      "bins": [
        {
          "name": "mms3_epd_feeps_srvy_l2_ion_top_energy_centroid_sensorid_8",
          "description": "Centroid of differential energy channels associated with each of 16 FEEPS channels sensor 8",
          "centers": [
            63.33,
            77.805,
            96.225,
            114.645,
            133.065,
            154.12,
            177.805,
            204.12,
            235.7,
            272.54,
            314.645,
            363.33,
            419.91,
            484.385,
            558.07,
            608.07
          ],
          "x_label": "Diffential energy channel centroid top sensor 8",
          "x_labelComponents": [
            [
              "CH_1",
              "CH_2",
              "CH_3",
              "CH_4",
              "CH_5",
              "CH_6",
              "CH_7",
              "CH_8",
              "CH_9",
              "CH_10",
              "CH_11",
              "CH_12",
              "CH_13",
              "CH_14",
              "CH_15",
              "CH_16"
            ]
          ],
          "units": "keV"
        }
      ]
    },
    {
      "name": "mms3_epd_feeps_srvy_l2_ion_bottom_count_rate_sensorid_6",
      "type": "double",
      "x_cdf_DataType": "CDF_DOUBLE",
      "description": "MMS3 FEEPS bottom side survey mode ion count rate sensor 6",
      "fill": "-1.0E31",
      "units": "counts/s",
      "x_label": "Count rate bottom sensor 6",
      "x_labelComponents": [
        [
          "CH_1",
          "CH_2",
          "CH_3",
          "CH_4",
          "CH_5",
          "CH_6",
          "CH_7",
          "CH_8",
          "CH_9",
          "CH_10",
          "CH_11",
          "CH_12",
          "CH_13",
          "CH_14",
          "CH_15",
          "CH_16"
        ]
      ],
      "x_format": ".3f",
      "x_fractionDigits": "3",
      "x_cdf_FORMAT": "F20.3",
      "x_cdf_FIELDNAM": "srvy_l2_ion_bottom_count_rate_sensorid_6 ",
      "x_cdf_DISPLAY_TYPE": "default_dimension",
      "x_cdf_DEPEND_0": "epoch",
      "size": [
        16
      ],
      "bins": [
        {
          "name": "mms3_epd_feeps_srvy_l2_ion_bottom_energy_centroid_sensorid_6",
          "description": "Centroid of differential energy channels associated with each of 16 FEEPS channels sensor 6",
          "centers": [
            58.105,
            77.915,
            96.415,
            114.905,
            133.4,
            153.215,
            176.99,
            204.73,
            236.44,
            273.425,
            315.695,
            364.58,
            420.06,
            483.465,
            558.76,
            608.965
          ],
          "x_label": "Diffential energy channel centroid bottom sensor 6",
          "x_labelComponents": [
            [
              "CH_1",
              "CH_2",
              "CH_3",
              "CH_4",
              "CH_5",
              "CH_6",
              "CH_7",
              "CH_8",
              "CH_9",
              "CH_10",
              "CH_11",
              "CH_12",
              "CH_13",
              "CH_14",
              "CH_15",
              "CH_16"
            ]
          ],
          "units": "keV"
        }
      ]
    },
    {
      "name": "mms3_epd_feeps_srvy_l2_ion_bottom_count_rate_sensorid_7",
      "type": "double",
      "x_cdf_DataType": "CDF_DOUBLE",
      "description": "MMS3 FEEPS bottom side survey mode ion count rate sensor 7",
      "fill": "-1.0E31",
      "units": "counts/s",
      "x_label": "Count rate bottom sensor 7",
      "x_labelComponents": [
        [
          "CH_1",
          "CH_2",
          "CH_3",
          "CH_4",
          "CH_5",
          "CH_6",
          "CH_7",
          "CH_8",
          "CH_9",
          "CH_10",
          "CH_11",
          "CH_12",
          "CH_13",
          "CH_14",
          "CH_15",
          "CH_16"
        ]
      ],
      "x_format": ".3f",
      "x_fractionDigits": "3",
      "x_cdf_FORMAT": "F20.3",
      "x_cdf_FIELDNAM": "srvy_l2_ion_bottom_count_rate_sensorid_7 ",
      "x_cdf_DISPLAY_TYPE": "default_dimension",
      "x_cdf_DEPEND_0": "epoch",
      "size": [
        16
      ],
      "bins": [
        {
          "name": "mms3_epd_feeps_srvy_l2_ion_bottom_energy_centroid_sensorid_7",
          "description": "Centroid of differential energy channels associated with each of 16 FEEPS channels sensor 7",
          "centers": [
            57.025,
            75.845,
            94.665,
            113.475,
            132.295,
            153.8,
            177.995,
            204.88,
            237.135,
            273.425,
            315.095,
            363.475,
            419.93,
            484.445,
            558.37,
            609.445
          ],
          "x_label": "Diffential energy channel centroid bottom sensor 7",
          "x_labelComponents": [
            [
              "CH_1",
              "CH_2",
              "CH_3",
              "CH_4",
              "CH_5",
              "CH_6",
              "CH_7",
              "CH_8",
              "CH_9",
              "CH_10",
              "CH_11",
              "CH_12",
              "CH_13",
              "CH_14",
              "CH_15",
              "CH_16"
            ]
          ],
          "units": "keV"
        }
      ]
    },
    {
      "name": "mms3_epd_feeps_srvy_l2_ion_bottom_count_rate_sensorid_8",
      "type": "double",
      "x_cdf_DataType": "CDF_DOUBLE",
      "description": "MMS3 FEEPS bottom side survey mode ion count rate sensor 8",
      "fill": "-1.0E31",
      "units": "counts/s",
      "x_label": "Count rate bottom sensor 8",
      "x_labelComponents": [
        [
          "CH_1",
          "CH_2",
          "CH_3",
          "CH_4",
          "CH_5",
          "CH_6",
          "CH_7",
          "CH_8",
          "CH_9",
          "CH_10",
          "CH_11",
          "CH_12",
          "CH_13",
          "CH_14",
          "CH_15",
          "CH_16"
        ]
      ],
      "x_format": ".3f",
      "x_fractionDigits": "3",
      "x_cdf_FORMAT": "F20.3",
      "x_cdf_FIELDNAM": "srvy_l2_ion_bottom_count_rate_sensorid_8 ",
      "x_cdf_DISPLAY_TYPE": "default_dimension",
      "x_cdf_DEPEND_0": "epoch",
      "size": [
        16
      ],
      "bins": [
        {
          "name": "mms3_epd_feeps_srvy_l2_ion_bottom_energy_centroid_sensorid_8",
          "description": "Centroid of differential energy channels associated with each of 16 FEEPS channels sensor 8",
          "centers": [
            58.72,
            77.4,
            96.085,
            114.765,
            133.445,
            153.46,
            177.48,
            205.505,
            237.53,
            273.555,
            314.92,
            364.295,
            420.34,
            484.39,
            559.12,
            601.82
          ],
          "x_label": "Diffential energy channel centroid bottom sensor 8",
          "x_labelComponents": [
            [
              "CH_1",
              "CH_2",
              "CH_3",
              "CH_4",
              "CH_5",
              "CH_6",
              "CH_7",
              "CH_8",
              "CH_9",
              "CH_10",
              "CH_11",
              "CH_12",
              "CH_13",
              "CH_14",
              "CH_15",
              "CH_16"
            ]
          ],
          "units": "keV"
        }
      ]
    },
    {
      "name": "mms3_epd_feeps_srvy_l2_ion_top_intensity_sensorid_6",
      "type": "double",
      "x_cdf_DataType": "CDF_DOUBLE",
      "description": "MMS3 FEEPS top side survey mode ion intensity sensor 6",
      "fill": "-1.0E31",
      "units": "1/(cm^2 s sr keV)",
      "x_label": "Unidirectional differential flux per spin sector top sensor 6",
      "x_labelComponents": [
        [
          "CH_1",
          "CH_2",
          "CH_3",
          "CH_4",
          "CH_5",
          "CH_6",
          "CH_7",
          "CH_8",
          "CH_9",
          "CH_10",
          "CH_11",
          "CH_12",
          "CH_13",
          "CH_14",
          "CH_15",
          "CH_16"
        ]
      ],
      "x_format": ".3f",
      "x_fractionDigits": "3",
      "x_cdf_FORMAT": "F20.3",
      "x_cdf_FIELDNAM": "srvy_l2_ion_top_intensity_sensorid_6 ",
      "x_cdf_DISPLAY_TYPE": "default_dimension",
      "x_cdf_DEPEND_0": "epoch",
      "size": [
        16
      ],
      "bins": [
        {
          "name": "mms3_epd_feeps_srvy_l2_ion_top_energy_centroid_sensorid_6",
          "description": "Centroid of differential energy channels associated with each of 16 FEEPS channels sensor 6",
          "centers": [
            61.795,
            76.305,
            94.775,
            113.245,
            133.035,
            154.145,
            177.89,
            205.595,
            237.255,
            274.195,
            316.41,
            363.905,
            419.315,
            483.96,
            557.835,
            610.605
          ],
          "x_label": "Diffential energy channel centroid top sensor 6",
          "x_labelComponents": [
            [
              "CH_1",
              "CH_2",
              "CH_3",
              "CH_4",
              "CH_5",
              "CH_6",
              "CH_7",
              "CH_8",
              "CH_9",
              "CH_10",
              "CH_11",
              "CH_12",
              "CH_13",
              "CH_14",
              "CH_15",
              "CH_16"
            ]
          ],
          "units": "keV"
        }
      ]
    },
    {
      "name": "mms3_epd_feeps_srvy_l2_ion_top_intensity_sensorid_7",
      "type": "double",
      "x_cdf_DataType": "CDF_DOUBLE",
      "description": "MMS3 FEEPS top side survey mode ion intensity sensor 7",
      "fill": "-1.0E31",
      "units": "1/(cm^2 s sr keV)",
      "x_label": "Unidirectional differential flux per spin sector top sensor 7",
      "x_labelComponents": [
        [
          "CH_1",
          "CH_2",
          "CH_3",
          "CH_4",
          "CH_5",
          "CH_6",
          "CH_7",
          "CH_8",
          "CH_9",
          "CH_10",
          "CH_11",
          "CH_12",
          "CH_13",
          "CH_14",
          "CH_15",
          "CH_16"
        ]
      ],
      "x_format": ".3f",
      "x_fractionDigits": "3",
      "x_cdf_FORMAT": "F20.3",
      "x_cdf_FIELDNAM": "srvy_l2_ion_top_intensity_sensorid_7 ",
      "x_cdf_DISPLAY_TYPE": "default_dimension",
      "x_cdf_DEPEND_0": "epoch",
      "size": [
        16
      ],
      "bins": [
        {
          "name": "mms3_epd_feeps_srvy_l2_ion_top_energy_centroid_sensorid_7",
          "description": "Centroid of differential energy channels associated with each of 16 FEEPS channels sensor 7",
          "centers": [
            62.18,
            76.925,
            95.705,
            114.475,
            133.245,
            153.355,
            177.495,
            205.65,
            236.49,
            272.69,
            315.6,
            363.865,
            420.185,
            484.55,
            558.295,
            606.565
          ],
          "x_label": "Diffential energy channel centroid top sensor 7",
          "x_labelComponents": [
            [
              "CH_1",
              "CH_2",
              "CH_3",
              "CH_4",
              "CH_5",
              "CH_6",
              "CH_7",
              "CH_8",
              "CH_9",
              "CH_10",
              "CH_11",
              "CH_12",
              "CH_13",
              "CH_14",
              "CH_15",
              "CH_16"
            ]
          ],
          "units": "keV"
        }
      ]
    },
    {
      "name": "mms3_epd_feeps_srvy_l2_ion_top_intensity_sensorid_8",
      "type": "double",
      "x_cdf_DataType": "CDF_DOUBLE",
      "description": "MMS3 FEEPS top side survey mode ion intensity sensor 8",
      "fill": "-1.0E31",
      "units": "1/(cm^2 s sr keV)",
      "x_label": "Unidirectional differential flux per spin sector top sensor 8",
      "x_labelComponents": [
        [
          "CH_1",
          "CH_2",
          "CH_3",
          "CH_4",
          "CH_5",
          "CH_6",
          "CH_7",
          "CH_8",
          "CH_9",
          "CH_10",
          "CH_11",
          "CH_12",
          "CH_13",
          "CH_14",
          "CH_15",
          "CH_16"
        ]
      ],
      "x_format": ".3f",
      "x_fractionDigits": "3",
      "x_cdf_FORMAT": "F20.3",
      "x_cdf_FIELDNAM": "srvy_l2_ion_top_intensity_sensorid_8 ",
      "x_cdf_DISPLAY_TYPE": "default_dimension",
      "x_cdf_DEPEND_0": "epoch",
      "size": [
        16
      ],
      "bins": [
        {
          "name": "mms3_epd_feeps_srvy_l2_ion_top_energy_centroid_sensorid_8",
          "description": "Centroid of differential energy channels associated with each of 16 FEEPS channels sensor 8",
          "centers": [
            63.33,
            77.805,
            96.225,
            114.645,
            133.065,
            154.12,
            177.805,
            204.12,
            235.7,
            272.54,
            314.645,
            363.33,
            419.91,
            484.385,
            558.07,
            608.07
          ],
          "x_label": "Diffential energy channel centroid top sensor 8",
          "x_labelComponents": [
            [
              "CH_1",
              "CH_2",
              "CH_3",
              "CH_4",
              "CH_5",
              "CH_6",
              "CH_7",
              "CH_8",
              "CH_9",
              "CH_10",
              "CH_11",
              "CH_12",
              "CH_13",
              "CH_14",
              "CH_15",
              "CH_16"
            ]
          ],
          "units": "keV"
        }
      ]
    },
    {
      "name": "mms3_epd_feeps_srvy_l2_ion_bottom_intensity_sensorid_6",
      "type": "double",
      "x_cdf_DataType": "CDF_DOUBLE",
      "description": "MMS3 FEEPS bottom side survey mode ion intensity sensor 6",
      "fill": "-1.0E31",
      "units": "1/(cm^2 s sr keV)",
      "x_label": "Unidirectional differential flux per spin sector bottom sensor 6",
      "x_labelComponents": [
        [
          "CH_1",
          "CH_2",
          "CH_3",
          "CH_4",
          "CH_5",
          "CH_6",
          "CH_7",
          "CH_8",
          "CH_9",
          "CH_10",
          "CH_11",
          "CH_12",
          "CH_13",
          "CH_14",
          "CH_15",
          "CH_16"
        ]
      ],
      "x_format": ".3f",
      "x_fractionDigits": "3",
      "x_cdf_FORMAT": "F20.3",
      "x_cdf_FIELDNAM": "srvy_l2_ion_bottom_intensity_sensorid_6 ",
      "x_cdf_DISPLAY_TYPE": "default_dimension",
      "x_cdf_DEPEND_0": "epoch",
      "size": [
        16
      ],
      "bins": [
        {
          "name": "mms3_epd_feeps_srvy_l2_ion_bottom_energy_centroid_sensorid_6",
          "description": "Centroid of differential energy channels associated with each of 16 FEEPS channels sensor 6",
          "centers": [
            58.105,
            77.915,
            96.415,
            114.905,
            133.4,
            153.215,
            176.99,
            204.73,
            236.44,
            273.425,
            315.695,
            364.58,
            420.06,
            483.465,
            558.76,
            608.965
          ],
          "x_label": "Diffential energy channel centroid bottom sensor 6",
          "x_labelComponents": [
            [
              "CH_1",
              "CH_2",
              "CH_3",
              "CH_4",
              "CH_5",
              "CH_6",
              "CH_7",
              "CH_8",
              "CH_9",
              "CH_10",
              "CH_11",
              "CH_12",
              "CH_13",
              "CH_14",
              "CH_15",
              "CH_16"
            ]
          ],
          "units": "keV"
        }
      ]
    },
    {
      "name": "mms3_epd_feeps_srvy_l2_ion_bottom_intensity_sensorid_7",
      "type": "double",
      "x_cdf_DataType": "CDF_DOUBLE",
      "description": "MMS3 FEEPS bottom side survey mode ion intensity sensor 7",
      "fill": "-1.0E31",
      "units": "1/(cm^2 s sr keV)",
      "x_label": "Unidirectional differential flux per spin sector bottom sensor 7",
      "x_labelComponents": [
        [
          "CH_1",
          "CH_2",
          "CH_3",
          "CH_4",
          "CH_5",
          "CH_6",
          "CH_7",
          "CH_8",
          "CH_9",
          "CH_10",
          "CH_11",
          "CH_12",
          "CH_13",
          "CH_14",
          "CH_15",
          "CH_16"
        ]
      ],
      "x_format": ".3f",
      "x_fractionDigits": "3",
      "x_cdf_FORMAT": "F20.3",
      "x_cdf_FIELDNAM": "srvy_l2_ion_bottom_intensity_sensorid_7 ",
      "x_cdf_DISPLAY_TYPE": "default_dimension",
      "x_cdf_DEPEND_0": "epoch",
      "size": [
        16
      ],
      "bins": [
        {
          "name": "mms3_epd_feeps_srvy_l2_ion_bottom_energy_centroid_sensorid_7",
          "description": "Centroid of differential energy channels associated with each of 16 FEEPS channels sensor 7",
          "centers": [
            57.025,
            75.845,
            94.665,
            113.475,
            132.295,
            153.8,
            177.995,
            204.88,
            237.135,
            273.425,
            315.095,
            363.475,
            419.93,
            484.445,
            558.37,
            609.445
          ],
          "x_label": "Diffential energy channel centroid bottom sensor 7",
          "x_labelComponents": [
            [
              "CH_1",
              "CH_2",
              "CH_3",
              "CH_4",
              "CH_5",
              "CH_6",
              "CH_7",
              "CH_8",
              "CH_9",
              "CH_10",
              "CH_11",
              "CH_12",
              "CH_13",
              "CH_14",
              "CH_15",
              "CH_16"
            ]
          ],
          "units": "keV"
        }
      ]
    },
    {
      "name": "mms3_epd_feeps_srvy_l2_ion_bottom_intensity_sensorid_8",
      "type": "double",
      "x_cdf_DataType": "CDF_DOUBLE",
      "description": "MMS3 FEEPS bottom side survey mode ion intensity sensor 8",
      "fill": "-1.0E31",
      "units": "1/(cm^2 s sr keV)",
      "x_label": "Unidirectional differential flux per spin sector bottom sensor 8",
      "x_labelComponents": [
        [
          "CH_1",
          "CH_2",
          "CH_3",
          "CH_4",
          "CH_5",
          "CH_6",
          "CH_7",
          "CH_8",
          "CH_9",
          "CH_10",
          "CH_11",
          "CH_12",
          "CH_13",
          "CH_14",
          "CH_15",
          "CH_16"
        ]
      ],
      "x_format": ".3f",
      "x_fractionDigits": "3",
      "x_cdf_FORMAT": "F20.3",
      "x_cdf_FIELDNAM": "srvy_l2_ion_bottom_intensity_sensorid_8 ",
      "x_cdf_DISPLAY_TYPE": "default_dimension",
      "x_cdf_DEPEND_0": "epoch",
      "size": [
        16
      ],
      "bins": [
        {
          "name": "mms3_epd_feeps_srvy_l2_ion_bottom_energy_centroid_sensorid_8",
          "description": "Centroid of differential energy channels associated with each of 16 FEEPS channels sensor 8",
          "centers": [
            58.72,
            77.4,
            96.085,
            114.765,
            133.445,
            153.46,
            177.48,
            205.505,
            237.53,
            273.555,
            314.92,
            364.295,
            420.34,
            484.39,
            559.12,
            601.82
          ],
          "x_label": "Diffential energy channel centroid bottom sensor 8",
          "x_labelComponents": [
            [
              "CH_1",
              "CH_2",
              "CH_3",
              "CH_4",
              "CH_5",
              "CH_6",
              "CH_7",
              "CH_8",
              "CH_9",
              "CH_10",
              "CH_11",
              "CH_12",
              "CH_13",
              "CH_14",
              "CH_15",
              "CH_16"
            ]
          ],
          "units": "keV"
        }
      ]
    },
    {
      "name": "mms3_epd_feeps_srvy_l2_ion_top_percent_error_sensorid_6",
      "type": "double",
      "x_cdf_DataType": "CDF_DOUBLE",
      "description": "MMS3 FEEPS top side survey mode ion count error statistics sensor 6",
      "fill": "-1.0E31",
      "units": " ",
      "x_label": "Percent Error top sensor 6",
      "x_labelComponents": [
        [
          "CH_1",
          "CH_2",
          "CH_3",
          "CH_4",
          "CH_5",
          "CH_6",
          "CH_7",
          "CH_8",
          "CH_9",
          "CH_10",
          "CH_11",
          "CH_12",
          "CH_13",
          "CH_14",
          "CH_15",
          "CH_16"
        ]
      ],
      "x_format": ".3f",
      "x_fractionDigits": "3",
      "x_cdf_FORMAT": "F20.3",
      "x_cdf_FIELDNAM": "srvy_l2_ion_top_percent_error_sensorid_6 ",
      "x_cdf_DISPLAY_TYPE": "default_dimension",
      "x_cdf_DEPEND_0": "epoch",
      "size": [
        16
      ],
      "bins": [
        {
          "name": "mms3_epd_feeps_srvy_l2_ion_top_energy_centroid_sensorid_6",
          "description": "Centroid of differential energy channels associated with each of 16 FEEPS channels sensor 6",
          "centers": [
            61.795,
            76.305,
            94.775,
            113.245,
            133.035,
            154.145,
            177.89,
            205.595,
            237.255,
            274.195,
            316.41,
            363.905,
            419.315,
            483.96,
            557.835,
            610.605
          ],
          "x_label": "Diffential energy channel centroid top sensor 6",
          "x_labelComponents": [
            [
              "CH_1",
              "CH_2",
              "CH_3",
              "CH_4",
              "CH_5",
              "CH_6",
              "CH_7",
              "CH_8",
              "CH_9",
              "CH_10",
              "CH_11",
              "CH_12",
              "CH_13",
              "CH_14",
              "CH_15",
              "CH_16"
            ]
          ],
          "units": "keV"
        }
      ]
    },
    {
      "name": "mms3_epd_feeps_srvy_l2_ion_top_percent_error_sensorid_7",
      "type": "double",
      "x_cdf_DataType": "CDF_DOUBLE",
      "description": "MMS3 FEEPS top side survey mode ion count error statistics sensor 7",
      "fill": "-1.0E31",
      "units": " ",
      "x_label": "Percent Error top sensor 7",
      "x_labelComponents": [
        [
          "CH_1",
          "CH_2",
          "CH_3",
          "CH_4",
          "CH_5",
          "CH_6",
          "CH_7",
          "CH_8",
          "CH_9",
          "CH_10",
          "CH_11",
          "CH_12",
          "CH_13",
          "CH_14",
          "CH_15",
          "CH_16"
        ]
      ],
      "x_format": ".3f",
      "x_fractionDigits": "3",
      "x_cdf_FORMAT": "F20.3",
      "x_cdf_FIELDNAM": "srvy_l2_ion_top_percent_error_sensorid_7 ",
      "x_cdf_DISPLAY_TYPE": "default_dimension",
      "x_cdf_DEPEND_0": "epoch",
      "size": [
        16
      ],
      "bins": [
        {
          "name": "mms3_epd_feeps_srvy_l2_ion_top_energy_centroid_sensorid_7",
          "description": "Centroid of differential energy channels associated with each of 16 FEEPS channels sensor 7",
          "centers": [
            62.18,
            76.925,
            95.705,
            114.475,
            133.245,
            153.355,
            177.495,
            205.65,
            236.49,
            272.69,
            315.6,
            363.865,
            420.185,
            484.55,
            558.295,
            606.565
          ],
          "x_label": "Diffential energy channel centroid top sensor 7",
          "x_labelComponents": [
            [
              "CH_1",
              "CH_2",
              "CH_3",
              "CH_4",
              "CH_5",
              "CH_6",
              "CH_7",
              "CH_8",
              "CH_9",
              "CH_10",
              "CH_11",
              "CH_12",
              "CH_13",
              "CH_14",
              "CH_15",
              "CH_16"
            ]
          ],
          "units": "keV"
        }
      ]
    },
    {
      "name": "mms3_epd_feeps_srvy_l2_ion_top_percent_error_sensorid_8",
      "type": "double",
      "x_cdf_DataType": "CDF_DOUBLE",
      "description": "MMS3 FEEPS top side survey mode ion count error statistics sensor 8",
      "fill": "-1.0E31",
      "units": " ",
      "x_label": "Percent Error top sensor 8",
      "x_labelComponents": [
        [
          "CH_1",
          "CH_2",
          "CH_3",
          "CH_4",
          "CH_5",
          "CH_6",
          "CH_7",
          "CH_8",
          "CH_9",
          "CH_10",
          "CH_11",
          "CH_12",
          "CH_13",
          "CH_14",
          "CH_15",
          "CH_16"
        ]
      ],
      "x_format": ".3f",
      "x_fractionDigits": "3",
      "x_cdf_FORMAT": "F20.3",
      "x_cdf_FIELDNAM": "srvy_l2_ion_top_percent_error_sensorid_8 ",
      "x_cdf_DISPLAY_TYPE": "default_dimension",
      "x_cdf_DEPEND_0": "epoch",
      "size": [
        16
      ],
      "bins": [
        {
          "name": "mms3_epd_feeps_srvy_l2_ion_top_energy_centroid_sensorid_8",
          "description": "Centroid of differential energy channels associated with each of 16 FEEPS channels sensor 8",
          "centers": [
            63.33,
            77.805,
            96.225,
            114.645,
            133.065,
            154.12,
            177.805,
            204.12,
            235.7,
            272.54,
            314.645,
            363.33,
            419.91,
            484.385,
            558.07,
            608.07
          ],
          "x_label": "Diffential energy channel centroid top sensor 8",
          "x_labelComponents": [
            [
              "CH_1",
              "CH_2",
              "CH_3",
              "CH_4",
              "CH_5",
              "CH_6",
              "CH_7",
              "CH_8",
              "CH_9",
              "CH_10",
              "CH_11",
              "CH_12",
              "CH_13",
              "CH_14",
              "CH_15",
              "CH_16"
            ]
          ],
          "units": "keV"
        }
      ]
    },
    {
      "name": "mms3_epd_feeps_srvy_l2_ion_bottom_percent_error_sensorid_6",
      "type": "double",
      "x_cdf_DataType": "CDF_DOUBLE",
      "description": "MMS3 FEEPS bottom side survey mode ion count error statistics sensor 6",
      "fill": "-1.0E31",
      "units": " ",
      "x_label": "Percent Error bottom sensor 6",
      "x_labelComponents": [
        [
          "CH_1",
          "CH_2",
          "CH_3",
          "CH_4",
          "CH_5",
          "CH_6",
          "CH_7",
          "CH_8",
          "CH_9",
          "CH_10",
          "CH_11",
          "CH_12",
          "CH_13",
          "CH_14",
          "CH_15",
          "CH_16"
        ]
      ],
      "x_format": ".3f",
      "x_fractionDigits": "3",
      "x_cdf_FORMAT": "F20.3",
      "x_cdf_FIELDNAM": "srvy_l2_ion_bottom_percent_error_sensorid_6 ",
      "x_cdf_DISPLAY_TYPE": "default_dimension",
      "x_cdf_DEPEND_0": "epoch",
      "size": [
        16
      ],
      "bins": [
        {
          "name": "mms3_epd_feeps_srvy_l2_ion_bottom_energy_centroid_sensorid_6",
          "description": "Centroid of differential energy channels associated with each of 16 FEEPS channels sensor 6",
          "centers": [
            58.105,
            77.915,
            96.415,
            114.905,
            133.4,
            153.215,
            176.99,
            204.73,
            236.44,
            273.425,
            315.695,
            364.58,
            420.06,
            483.465,
            558.76,
            608.965
          ],
          "x_label": "Diffential energy channel centroid bottom sensor 6",
          "x_labelComponents": [
            [
              "CH_1",
              "CH_2",
              "CH_3",
              "CH_4",
              "CH_5",
              "CH_6",
              "CH_7",
              "CH_8",
              "CH_9",
              "CH_10",
              "CH_11",
              "CH_12",
              "CH_13",
              "CH_14",
              "CH_15",
              "CH_16"
            ]
          ],
          "units": "keV"
        }
      ]
    },
    {
      "name": "mms3_epd_feeps_srvy_l2_ion_bottom_percent_error_sensorid_7",
      "type": "double",
      "x_cdf_DataType": "CDF_DOUBLE",
      "description": "MMS3 FEEPS bottom side survey mode ion count error statistics sensor 7",
      "fill": "-1.0E31",
      "units": " ",
      "x_label": "Percent Error bottom sensor 7",
      "x_labelComponents": [
        [
          "CH_1",
          "CH_2",
          "CH_3",
          "CH_4",
          "CH_5",
          "CH_6",
          "CH_7",
          "CH_8",
          "CH_9",
          "CH_10",
          "CH_11",
          "CH_12",
          "CH_13",
          "CH_14",
          "CH_15",
          "CH_16"
        ]
      ],
      "x_format": ".3f",
      "x_fractionDigits": "3",
      "x_cdf_FORMAT": "F20.3",
      "x_cdf_FIELDNAM": "srvy_l2_ion_bottom_percent_error_sensorid_7 ",
      "x_cdf_DISPLAY_TYPE": "default_dimension",
      "x_cdf_DEPEND_0": "epoch",
      "size": [
        16
      ],
      "bins": [
        {
          "name": "mms3_epd_feeps_srvy_l2_ion_bottom_energy_centroid_sensorid_7",
          "description": "Centroid of differential energy channels associated with each of 16 FEEPS channels sensor 7",
          "centers": [
            57.025,
            75.845,
            94.665,
            113.475,
            132.295,
            153.8,
            177.995,
            204.88,
            237.135,
            273.425,
            315.095,
            363.475,
            419.93,
            484.445,
            558.37,
            609.445
          ],
          "x_label": "Diffential energy channel centroid bottom sensor 7",
          "x_labelComponents": [
            [
              "CH_1",
              "CH_2",
              "CH_3",
              "CH_4",
              "CH_5",
              "CH_6",
              "CH_7",
              "CH_8",
              "CH_9",
              "CH_10",
              "CH_11",
              "CH_12",
              "CH_13",
              "CH_14",
              "CH_15",
              "CH_16"
            ]
          ],
          "units": "keV"
        }
      ]
    },
    {
      "name": "mms3_epd_feeps_srvy_l2_ion_bottom_percent_error_sensorid_8",
      "type": "double",
      "x_cdf_DataType": "CDF_DOUBLE",
      "description": "MMS3 FEEPS bottom side survey mode ion count error statistics sensor 8",
      "fill": "-1.0E31",
      "units": " ",
      "x_label": "Percent Error bottom sensor 8",
      "x_labelComponents": [
        [
          "CH_1",
          "CH_2",
          "CH_3",
          "CH_4",
          "CH_5",
          "CH_6",
          "CH_7",
          "CH_8",
          "CH_9",
          "CH_10",
          "CH_11",
          "CH_12",
          "CH_13",
          "CH_14",
          "CH_15",
          "CH_16"
        ]
      ],
      "x_format": ".3f",
      "x_fractionDigits": "3",
      "x_cdf_FORMAT": "F20.3",
      "x_cdf_FIELDNAM": "srvy_l2_ion_bottom_percent_error_sensorid_8 ",
      "x_cdf_DISPLAY_TYPE": "default_dimension",
      "x_cdf_DEPEND_0": "epoch",
      "size": [
        16
      ],
      "bins": [
        {
          "name": "mms3_epd_feeps_srvy_l2_ion_bottom_energy_centroid_sensorid_8",
          "description": "Centroid of differential energy channels associated with each of 16 FEEPS channels sensor 8",
          "centers": [
            58.72,
            77.4,
            96.085,
            114.765,
            133.445,
            153.46,
            177.48,
            205.505,
            237.53,
            273.555,
            314.92,
            364.295,
            420.34,
            484.39,
            559.12,
            601.82
          ],
          "x_label": "Diffential energy channel centroid bottom sensor 8",
          "x_labelComponents": [
            [
              "CH_1",
              "CH_2",
              "CH_3",
              "CH_4",
              "CH_5",
              "CH_6",
              "CH_7",
              "CH_8",
              "CH_9",
              "CH_10",
              "CH_11",
              "CH_12",
              "CH_13",
              "CH_14",
              "CH_15",
              "CH_16"
            ]
          ],
          "units": "keV"
        }
      ]
    },
    {
      "name": "mms3_epd_feeps_srvy_l2_ion_pitch_angle",
      "type": "double",
      "x_cdf_DataType": "CDF_FLOAT",
      "description": "The angle formed by the normal vector of the sensor plane and the magnetic field (BField)",
      "fill": "-1.0E31",
      "units": "deg",
      "x_label": "Pitch Angle",
      "x_labelComponents": [
        [
          "TOP_SENSOR_6",
          "TOP_SENSOR_7",
          "TOP_SENSOR_8",
          "BOT_SENSOR_6",
          "BOT_SENSOR_7",
          "BOT_SENSOR_8"
        ]
      ],
      "x_format": ".3f",
      "x_fractionDigits": "3",
      "x_cdf_FORMAT": "F20.3",
      "x_cdf_FIELDNAM": "srvy_l2_ion_pitch_angle ",
      "x_cdf_DISPLAY_TYPE": "default_dimension",
      "x_cdf_DEPEND_0": "epoch",
      "size": [
        6
      ],
      "bins": [
        {
          "name": "pitch_angle_indices",
          "description": "INTEGERS USED TO INDEX THE TOP AND BOTTOM ION SENSORS",
          "centers": [
            6,
            7,
            8,
            -6,
            -7,
            -8
          ],
          "units": null
        }
      ]
    },
    {
      "name": "mms3_epd_feeps_srvy_l2_ion_lat_gse",
      "type": "double",
      "x_cdf_DataType": "CDF_DOUBLE",
      "description": "Latitude",
      "fill": "-1.0E31",
      "units": "deg",
      "x_label": "Latitude",
      "x_format": ".3f",
      "x_fractionDigits": "3",
      "x_cdf_FORMAT": "F20.3",
      "x_cdf_FIELDNAM": "srvy_l2_ion_lat_gse ",
      "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": "2026-04-12T15:11:34Z"
}