{
  "Epoch": [
    {
      "url": "https://cdaweb.gsfc.nasa.gov/sp_phys/data/mms/mms4/fpi/fast/l2/dis-momsaux/2015/09/mms4_fpi_fast_l2_dis-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/dis-momsaux/2015/09/mms4_fpi_fast_l2_dis-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/dis-momsaux/2025/12/mms4_fpi_fast_l2_dis-momsaux_20251227160000_v3.4.0.cdf",
      "start": "2025-12-27T16:00:04.239469000Z",
      "stop": "2025-12-27T17:59:59.778818000Z",
      "note": "Counts based on variable 'Epoch' in https://cdaweb.gsfc.nasa.gov/sp_phys/data/mms/mms4/fpi/fast/l2/dis-momsaux/2025/12/mms4_fpi_fast_l2_dis-momsaux_20251227160000_v3.4.0.cdf. The most common cadence, 4500022000 [ns] = PT4.500022S, occurred for 25.8286% of the 413 timesteps.",
      "counts": [
        {
          "count": 413,
          "duration": 4500022000,
          "duration_unit": "ns",
          "duration_iso8601": "PT4.500022S",
          "fraction": 0.2582864290181363
        },
        {
          "count": 382,
          "duration": 4500027000,
          "duration_unit": "ns",
          "duration_iso8601": "PT4.500027S",
          "fraction": 0.23889931207004378
        },
        {
          "count": 280,
          "duration": 4500028000,
          "duration_unit": "ns",
          "duration_iso8601": "PT4.500028S",
          "fraction": 0.17510944340212634
        },
        {
          "count": 227,
          "duration": 4500021000,
          "duration_unit": "ns",
          "duration_iso8601": "PT4.500021S",
          "fraction": 0.14196372732958099
        },
        {
          "count": 121,
          "duration": 4500023000,
          "duration_unit": "ns",
          "duration_iso8601": "PT4.500023S",
          "fraction": 0.07567229518449031
        },
        {
          "count": 77,
          "duration": 4500026000,
          "duration_unit": "ns",
          "duration_iso8601": "PT4.500026S",
          "fraction": 0.04815509693558474
        },
        {
          "count": 49,
          "duration": 4500029000,
          "duration_unit": "ns",
          "duration_iso8601": "PT4.500029S",
          "fraction": 0.030644152595372107
        },
        {
          "count": 18,
          "duration": 4500020000,
          "duration_unit": "ns",
          "duration_iso8601": "PT4.50002S",
          "fraction": 0.01125703564727955
        },
        {
          "count": 10,
          "duration": 4500024000,
          "duration_unit": "ns",
          "duration_iso8601": "PT4.500024S",
          "fraction": 0.006253908692933083
        },
        {
          "count": 3,
          "duration": 4500019000,
          "duration_unit": "ns",
          "duration_iso8601": "PT4.500019S",
          "fraction": 0.001876172607879925
        },
        {
          "count": 2,
          "duration": 4500006000,
          "duration_unit": "ns",
          "duration_iso8601": "PT4.500006S",
          "fraction": 0.0012507817385866166
        },
        {
          "count": 2,
          "duration": 4500042000,
          "duration_unit": "ns",
          "duration_iso8601": "PT4.500042S",
          "fraction": 0.0012507817385866166
        },
        {
          "count": 2,
          "duration": 4500003000,
          "duration_unit": "ns",
          "duration_iso8601": "PT4.500003S",
          "fraction": 0.0012507817385866166
        },
        {
          "count": 2,
          "duration": 4500011000,
          "duration_unit": "ns",
          "duration_iso8601": "PT4.500011S",
          "fraction": 0.0012507817385866166
        },
        {
          "count": 1,
          "duration": 4500017000,
          "duration_unit": "ns",
          "duration_iso8601": "PT4.500017S",
          "fraction": 0.0006253908692933083
        },
        {
          "count": 1,
          "duration": 4500033000,
          "duration_unit": "ns",
          "duration_iso8601": "PT4.500033S",
          "fraction": 0.0006253908692933083
        },
        {
          "count": 1,
          "duration": 4500030000,
          "duration_unit": "ns",
          "duration_iso8601": "PT4.50003S",
          "fraction": 0.0006253908692933083
        },
        {
          "count": 1,
          "duration": 4500046000,
          "duration_unit": "ns",
          "duration_iso8601": "PT4.500046S",
          "fraction": 0.0006253908692933083
        },
        {
          "count": 1,
          "duration": 4500037000,
          "duration_unit": "ns",
          "duration_iso8601": "PT4.500037S",
          "fraction": 0.0006253908692933083
        },
        {
          "count": 1,
          "duration": 4500002000,
          "duration_unit": "ns",
          "duration_iso8601": "PT4.500002S",
          "fraction": 0.0006253908692933083
        },
        {
          "count": 1,
          "duration": 4500048000,
          "duration_unit": "ns",
          "duration_iso8601": "PT4.500048S",
          "fraction": 0.0006253908692933083
        },
        {
          "count": 1,
          "duration": 4500025000,
          "duration_unit": "ns",
          "duration_iso8601": "PT4.500025S",
          "fraction": 0.0006253908692933083
        },
        {
          "count": 1,
          "duration": 4500047000,
          "duration_unit": "ns",
          "duration_iso8601": "PT4.500047S",
          "fraction": 0.0006253908692933083
        },
        {
          "count": 1,
          "duration": 4500031000,
          "duration_unit": "ns",
          "duration_iso8601": "PT4.500031S",
          "fraction": 0.0006253908692933083
        },
        {
          "count": 1,
          "duration": 4500039000,
          "duration_unit": "ns",
          "duration_iso8601": "PT4.500039S",
          "fraction": 0.0006253908692933083
        }
      ]
    }
  ]
}