{
  "startDate": "2015-12-06T00:23:05Z",
  "stopDate": "2026-01-19T19:48:32Z",
  "sampleStartDate": "2026-01-19T19:43:33Z",
  "sampleStopDate": "2026-01-19T19:46:02Z",
  "cadence": "PT0.03S",
  "x_cadence_fraction": 1,
  "x_cadence_note": "Counts based on variable 'Epoch' in https://cdaweb.gsfc.nasa.gov/sp_phys/data/mms/mms4/mec/brst/l2/ephts04d/2015/12/mms4_mec_brst_l2_ephts04d_20151206002305_v2.2.0.cdf. The most common cadence, 30000000 [ns] = PT0.03S, occurred for all 4999 timesteps. ",
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  "resourceURL": "https://cdaweb.gsfc.nasa.gov/misc/NotesM.html#MMS4_MEC_BRST_L2_EPHTS04D",
  "contact": "M. G. Henderson, S. K. Morley @ Los Alamos National Laboratory (LANL)",
  "resourceID": "https://doi.org/10.48322/q52x-jp67",
  "additionalMetadata": {
    "name": "SPASE",
    "contentURL": "https://spase-metadata.org/NASA/NumericalData/MMS/4/Ephemeris/Burst/Level2/Tsyganenko_04_Dynamic/PT0.030S.html"
  },
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      "fill": null,
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      "units": "nT",
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    },
    {
      "name": "mms4_mec_r_sm",
      "type": "double",
      "x_cdf_DataType": "CDF_DOUBLE",
      "description": "Geocentric Solar Magnetic (SM) position vector of mms4 (km)",
      "fill": "-1.0E31",
      "units": "km",
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        "mms4_r_sm_y",
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    },
    {
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      "type": "double",
      "x_cdf_DataType": "CDF_DOUBLE",
      "description": "Velocity of mms4 spacecraft in SM coordinates (km/s)",
      "fill": "-1.0E31",
      "units": "km/s",
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        "mms4_v_sm_y",
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    },
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      "type": "double",
      "x_cdf_DataType": "CDF_DOUBLE",
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      "units": " ",
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  "x_cdaweb_hapi_version": "20260130.0606",
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  "x_LastUpdate": "2026-04-12T15:11:45Z"
}