{
  "startDate": "2015-09-02T00:28:46Z",
  "stopDate": "2025-08-26T07:14:40Z",
  "sampleStartDate": "2025-08-22T03:51:40Z",
  "sampleStopDate": "2025-08-22T20:50:35Z",
  "cadence": "PT58.084161S",
  "x_cadence_fraction": 0.01834862385321101,
  "x_cadence_note": "Counts based on variable 'Epoch' in https://cdaweb.gsfc.nasa.gov/sp_phys/data/mms/mms4/fpi/slow/l2/des-dist/2015/09/mms4_fpi_slow_l2_des-dist_20150902002846_v3.4.0.cdf. The most common cadence, 58084161000 [ns] = PT58.084161S, occurred for 1.8349% of the 2 timesteps.",
  "maxRequestDuration": "PT3056750S",
  "resourceURL": "https://cdaweb.gsfc.nasa.gov/misc/NotesM.html#MMS4_FPI_SLOW_L2_DES-DIST",
  "contact": "J. Burch, D. Gershman @ SwRI, GSFC",
  "parameters": [
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      "units": "UTC",
      "length": 30,
      "fill": null,
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      "x_cdf_NAME": "Epoch",
      "x_cdf_DataType": "CDF_TIME_TT2000"
    },
    {
      "name": "mms4_des_errorflags_slow",
      "type": "double",
      "x_cdf_DataType": "CDF_UINT4",
      "description": "MMS4 FPI/DES vector of data-quality indicators at survey-start time. Note: CDF_UINT4 data was converted to HAPI double.",
      "fill": "4.294967295E9",
      "units": "32-bit error flags",
      "x_label": "errFlags",
      "x_cdf_FORMAT": "I10",
      "x_cdf_FIELDNAM": "MMS4 FPI/DES quality error flag",
      "x_cdf_DISPLAY_TYPE": "default_dimension",
      "x_cdf_DEPEND_0": "Epoch"
    },
    {
      "name": "mms4_des_startdelphi_count_slow",
      "type": "integer",
      "x_cdf_DataType": "CDF_UINT2",
      "description": "MMS4 FPI/DES Del-Phi (obs spin-phase) count at survey-start time",
      "fill": "65535",
      "units": "del-phi counts",
      "x_label": "DelPhi_cnt",
      "x_cdf_FORMAT": "I4.4",
      "x_cdf_FIELDNAM": "MMS4 FPI/DES start Del-Phi count",
      "x_cdf_DISPLAY_TYPE": "default_dimension",
      "x_cdf_DEPEND_0": "Epoch"
    },
    {
      "name": "mms4_des_startdelphi_angle_slow",
      "type": "double",
      "x_cdf_DataType": "CDF_REAL4",
      "description": "MMS4 FPI/DES Del-Phi (obs spin-phase) angle at survey-start time",
      "fill": "-1.0E31",
      "units": "deg",
      "x_label": "DelPhi_ang",
      "x_format": ".2e",
      "x_fractionDigits": "2",
      "x_cdf_FORMAT": "E12.2",
      "x_cdf_FIELDNAM": "MMS4 FPI/DES start Del-Phi angle",
      "x_cdf_DISPLAY_TYPE": "default_dimension",
      "x_cdf_DEPEND_0": "Epoch"
    },
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      "name": "mms4_des_dist_slow",
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      "x_cdf_DataType": "CDF_REAL4",
      "description": "MMS4 FPI/DES Slow Survey sky-map instrument distribution",
      "fill": "-1.0E31",
      "units": "s^3/cm^6",
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        [
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          "36.5 deg",
          "59.0 deg",
          "81.5 deg",
          "104.0 deg",
          "126.5 deg",
          "149.0 deg",
          "171.5 deg",
          "194.0 deg",
          "216.5 deg",
          "239.0 deg",
          "261.5 deg",
          "284.0 deg",
          "306.5 deg",
          "329.0 deg",
          "351.5 deg"
        ],
        [
          "5.6250 deg",
          "16.875 deg",
          "28.125 deg",
          "39.375 deg",
          "50.625 deg",
          "61.875 deg",
          "73.125 deg",
          "84.375 deg",
          "95.625 deg",
          "106.88 deg",
          "118.13 deg",
          "129.38 deg",
          "140.63 deg",
          "151.88 deg",
          "163.13 deg",
          "174.38 deg"
        ],
        [
          "energy00",
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          "energy03",
          "energy04",
          "energy05",
          "energy07",
          "energy07",
          "energy08",
          "energy09",
          "energy10",
          "energy11",
          "energy12",
          "energy13",
          "energy14",
          "energy15",
          "energy16",
          "energy17",
          "energy18",
          "energy19",
          "energy20",
          "energy21",
          "energy22",
          "energy23",
          "energy24",
          "energy25",
          "energy26",
          "energy27",
          "energy28",
          "energy29",
          "energy30",
          "energy31"
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      ],
      "x_format": ".2e",
      "x_fractionDigits": "2",
      "x_cdf_FORMAT": "E12.2",
      "x_cdf_FIELDNAM": "MMS4 FPI/DES slowSkyMap dist",
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    {
      "name": "mms4_des_disterr_slow",
      "type": "double",
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      "fill": "-1.0E31",
      "units": "s^3/cm^6",
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          "36.5 deg",
          "59.0 deg",
          "81.5 deg",
          "104.0 deg",
          "126.5 deg",
          "149.0 deg",
          "171.5 deg",
          "194.0 deg",
          "216.5 deg",
          "239.0 deg",
          "261.5 deg",
          "284.0 deg",
          "306.5 deg",
          "329.0 deg",
          "351.5 deg"
        ],
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          "5.6250 deg",
          "16.875 deg",
          "28.125 deg",
          "39.375 deg",
          "50.625 deg",
          "61.875 deg",
          "73.125 deg",
          "84.375 deg",
          "95.625 deg",
          "106.88 deg",
          "118.13 deg",
          "129.38 deg",
          "140.63 deg",
          "151.88 deg",
          "163.13 deg",
          "174.38 deg"
        ],
        [
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          "energy01",
          "energy02",
          "energy03",
          "energy04",
          "energy05",
          "energy07",
          "energy07",
          "energy08",
          "energy09",
          "energy10",
          "energy11",
          "energy12",
          "energy13",
          "energy14",
          "energy15",
          "energy16",
          "energy17",
          "energy18",
          "energy19",
          "energy20",
          "energy21",
          "energy22",
          "energy23",
          "energy24",
          "energy25",
          "energy26",
          "energy27",
          "energy28",
          "energy29",
          "energy30",
          "energy31"
        ]
      ],
      "x_format": ".2e",
      "x_fractionDigits": "2",
      "x_cdf_FORMAT": "E12.2",
      "x_cdf_FIELDNAM": "MMS4 FPI/DES slowSkyMap distErr",
      "x_cdf_DISPLAY_TYPE": "default_dimension",
      "x_cdf_DEPEND_0": "Epoch",
      "size": [
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        32
      ]
    },
    {
      "name": "mms4_des_avgf1counts_slow",
      "type": "double",
      "x_cdf_DataType": "CDF_REAL4",
      "description": "MMS4 FPI/DES slow survey average f1 count values",
      "fill": "-1.0E31",
      "units": "s^3/cm^6",
      "x_label": "avg 1-count level",
      "x_format": ".2e",
      "x_fractionDigits": "2",
      "x_cdf_FORMAT": "E12.2",
      "x_cdf_FIELDNAM": "MMS4 FPI/DES avgf1counts",
      "x_cdf_DEPEND_0": "Epoch",
      "size": [
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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": "2026-05-12T15:24:25Z"
}