{
  "Epoch": [
    {
      "url": "https://cdaweb.gsfc.nasa.gov/sp_phys/data/mms/mms4/fpi/fast/l2/des-momsaux/2015/09/mms4_fpi_fast_l2_des-momsaux_20150901080000_v3.4.0.cdf",
      "start": "2015-09-01T09:46:45.112763000Z",
      "stop": "2015-09-01T09:59:57.113062000Z",
      "note": "Counts based on variable 'Epoch' in https://cdaweb.gsfc.nasa.gov/sp_phys/data/mms/mms4/fpi/fast/l2/des-momsaux/2015/09/mms4_fpi_fast_l2_des-momsaux_20150901080000_v3.4.0.cdf. The most common cadence, 4500002000 [ns] = PT4.500002S, occurred for 39.2045% of the 69 timesteps.",
      "counts": [
        {
          "count": 69,
          "duration": 4500002000,
          "duration_unit": "ns",
          "duration_iso8601": "PT4.500002S",
          "fraction": 0.39204545454545453
        },
        {
          "count": 61,
          "duration": 4500001000,
          "duration_unit": "ns",
          "duration_iso8601": "PT4.500001S",
          "fraction": 0.3465909090909091
        },
        {
          "count": 28,
          "duration": 4500003000,
          "duration_unit": "ns",
          "duration_iso8601": "PT4.500003S",
          "fraction": 0.1590909090909091
        },
        {
          "count": 14,
          "duration": 4500000000,
          "duration_unit": "ns",
          "duration_iso8601": "PT4.5S",
          "fraction": 0.07954545454545454
        },
        {
          "count": 4,
          "duration": 4500004000,
          "duration_unit": "ns",
          "duration_iso8601": "PT4.500004S",
          "fraction": 0.022727272727272728
        }
      ]
    },
    {
      "url": "https://cdaweb.gsfc.nasa.gov/sp_phys/data/mms/mms4/fpi/fast/l2/des-momsaux/2017/10/mms4_fpi_fast_l2_des-momsaux_20171031000000_v3.4.0.cdf",
      "start": "2017-10-31T00:00:01.208061000Z",
      "stop": "2017-10-31T01:53:52.232258000Z",
      "note": "Counts based on variable 'Epoch' in https://cdaweb.gsfc.nasa.gov/sp_phys/data/mms/mms4/fpi/fast/l2/des-momsaux/2017/10/mms4_fpi_fast_l2_des-momsaux_20171031000000_v3.4.0.cdf. The most common cadence, 4500014000 [ns] = PT4.500014S, occurred for 27.0092% of the 410 timesteps.",
      "counts": [
        {
          "count": 410,
          "duration": 4500014000,
          "duration_unit": "ns",
          "duration_iso8601": "PT4.500014S",
          "fraction": 0.27009222661396576
        },
        {
          "count": 391,
          "duration": 4500018000,
          "duration_unit": "ns",
          "duration_iso8601": "PT4.500018S",
          "fraction": 0.25757575757575757
        },
        {
          "count": 235,
          "duration": 4500017000,
          "duration_unit": "ns",
          "duration_iso8601": "PT4.500017S",
          "fraction": 0.15480895915678525
        },
        {
          "count": 211,
          "duration": 4500015000,
          "duration_unit": "ns",
          "duration_iso8601": "PT4.500015S",
          "fraction": 0.13899868247694336
        },
        {
          "count": 117,
          "duration": 4500013000,
          "duration_unit": "ns",
          "duration_iso8601": "PT4.500013S",
          "fraction": 0.07707509881422925
        },
        {
          "count": 99,
          "duration": 4500019000,
          "duration_unit": "ns",
          "duration_iso8601": "PT4.500019S",
          "fraction": 0.06521739130434782
        },
        {
          "count": 36,
          "duration": 4500016000,
          "duration_unit": "ns",
          "duration_iso8601": "PT4.500016S",
          "fraction": 0.023715415019762844
        },
        {
          "count": 5,
          "duration": 4500012000,
          "duration_unit": "ns",
          "duration_iso8601": "PT4.500012S",
          "fraction": 0.0032938076416337285
        },
        {
          "count": 2,
          "duration": 4500010000,
          "duration_unit": "ns",
          "duration_iso8601": "PT4.50001S",
          "fraction": 0.0013175230566534915
        },
        {
          "count": 1,
          "duration": 4500003000,
          "duration_unit": "ns",
          "duration_iso8601": "PT4.500003S",
          "fraction": 0.0006587615283267457
        },
        {
          "count": 1,
          "duration": 4500029000,
          "duration_unit": "ns",
          "duration_iso8601": "PT4.500029S",
          "fraction": 0.0006587615283267457
        },
        {
          "count": 1,
          "duration": 4500022000,
          "duration_unit": "ns",
          "duration_iso8601": "PT4.500022S",
          "fraction": 0.0006587615283267457
        },
        {
          "count": 1,
          "duration": 4500001000,
          "duration_unit": "ns",
          "duration_iso8601": "PT4.500001S",
          "fraction": 0.0006587615283267457
        },
        {
          "count": 1,
          "duration": 4500030000,
          "duration_unit": "ns",
          "duration_iso8601": "PT4.50003S",
          "fraction": 0.0006587615283267457
        },
        {
          "count": 1,
          "duration": 4500006000,
          "duration_unit": "ns",
          "duration_iso8601": "PT4.500006S",
          "fraction": 0.0006587615283267457
        },
        {
          "count": 1,
          "duration": 4500026000,
          "duration_unit": "ns",
          "duration_iso8601": "PT4.500026S",
          "fraction": 0.0006587615283267457
        },
        {
          "count": 1,
          "duration": 4500023000,
          "duration_unit": "ns",
          "duration_iso8601": "PT4.500023S",
          "fraction": 0.0006587615283267457
        },
        {
          "count": 1,
          "duration": 4500011000,
          "duration_unit": "ns",
          "duration_iso8601": "PT4.500011S",
          "fraction": 0.0006587615283267457
        },
        {
          "count": 1,
          "duration": 4500020000,
          "duration_unit": "ns",
          "duration_iso8601": "PT4.50002S",
          "fraction": 0.0006587615283267457
        },
        {
          "count": 1,
          "duration": 4500009000,
          "duration_unit": "ns",
          "duration_iso8601": "PT4.500009S",
          "fraction": 0.0006587615283267457
        },
        {
          "count": 1,
          "duration": 4500021000,
          "duration_unit": "ns",
          "duration_iso8601": "PT4.500021S",
          "fraction": 0.0006587615283267457
        }
      ]
    }
  ]
}