{
  "cal_frequency": [
    {
      "url": "https://cdaweb.gsfc.nasa.gov/sp_phys/data/tracers/tracers1/msc_searchcoil/l2/bac/2025/ts1_l2_msc_bac_20250926_v1.2.0.cdf",
      "counts": [],
      "error": "DataType = CDF_FLOAT is not one of ['CDF_EPOCH', 'CDF_EPOCH16', 'CDF_TIME_TT2000']"
    },
    {
      "url": "https://cdaweb.gsfc.nasa.gov/sp_phys/data/tracers/tracers1/msc_searchcoil/l2/bac/2026/ts1_l2_msc_bac_20260531_v1.3.0.cdf",
      "counts": [],
      "error": "DataType = CDF_FLOAT is not one of ['CDF_EPOCH', 'CDF_EPOCH16', 'CDF_TIME_TT2000']"
    }
  ],
  "Epoch": [
    {
      "url": "https://cdaweb.gsfc.nasa.gov/sp_phys/data/tracers/tracers1/msc_searchcoil/l2/bac/2025/ts1_l2_msc_bac_20250926_v1.2.0.cdf",
      "start": "2025-09-26T01:54:01.298611000Z",
      "stop": "2025-09-26T02:13:00.798611000Z",
      "note": "Counts based on variable 'Epoch' in https://cdaweb.gsfc.nasa.gov/sp_phys/data/tracers/tracers1/msc_searchcoil/l2/bac/2025/ts1_l2_msc_bac_20250926_v1.2.0.cdf. The most common cadence, 500000000 [ns] = PT0.5S, occurred for 99.9559% of the 2268 timesteps.",
      "counts": [
        {
          "count": 2268,
          "duration": 500000000,
          "duration_unit": "ns",
          "duration_iso8601": "PT0.5S",
          "fraction": 0.999559277214632
        },
        {
          "count": 1,
          "duration": 5500000000,
          "duration_unit": "ns",
          "duration_iso8601": "PT5.5S",
          "fraction": 0.00044072278536800354
        }
      ]
    },
    {
      "url": "https://cdaweb.gsfc.nasa.gov/sp_phys/data/tracers/tracers1/msc_searchcoil/l2/bac/2026/ts1_l2_msc_bac_20260531_v1.3.0.cdf",
      "start": "2026-05-31T00:00:00.199490000Z",
      "stop": "2026-05-31T23:59:51.781033000Z",
      "note": "Counts based on variable 'Epoch' in https://cdaweb.gsfc.nasa.gov/sp_phys/data/tracers/tracers1/msc_searchcoil/l2/bac/2026/ts1_l2_msc_bac_20260531_v1.3.0.cdf. The most common cadence, 500000000 [ns] = PT0.5S, occurred for 95.8563% of the 11150 timesteps.",
      "counts": [
        {
          "count": 11150,
          "duration": 500000000,
          "duration_unit": "ns",
          "duration_iso8601": "PT0.5S",
          "fraction": 0.9585625859697386
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          "duration": 64000000000,
          "duration_unit": "ns",
          "duration_iso8601": "PT1M4S",
          "fraction": 0.03189477303988996
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          "duration": 501465000,
          "duration_unit": "ns",
          "duration_iso8601": "PT0.501465S",
          "fraction": 0.002579092159559835
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          "duration": 498047000,
          "duration_unit": "ns",
          "duration_iso8601": "PT0.498047S",
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          "duration": 501464000,
          "duration_unit": "ns",
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        {
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          "duration": 500488000,
          "duration_unit": "ns",
          "duration_iso8601": "PT0.500488S",
          "fraction": 0.00042984869325997247
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          "duration": 499512000,
          "duration_unit": "ns",
          "duration_iso8601": "PT0.499512S",
          "fraction": 0.00025790921595598347
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          "fraction": 0.00025790921595598347
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        {
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}