{
  "startDate": "2016-01-04T16:23:20Z",
  "stopDate": "2020-05-10T10:54:43Z",
  "sampleStartDate": "2020-05-09T10:14:33Z",
  "sampleStopDate": "2020-05-10T00:00:02Z",
  "cadence": "PT4.000052S",
  "x_cadence_fraction": 0.13233568075117372,
  "x_cadence_note": "Counts based on variable 'epoch_timetag' in https://cdaweb.gsfc.nasa.gov/sp_phys/data/mms/mms4/edi/srvy/l2/amb-pm2/2016/01/mms4_edi_srvy_l2_amb-pm2_20160104_v4.2.0.cdf. The most common cadence, 4000051904 [ns] = PT4.000052S, occurred for 13.2336% of the 902 timesteps. ",
  "maxRequestDuration": "PT2476450S",
  "resourceURL": "https://cdaweb.gsfc.nasa.gov/misc/NotesM.html#MMS4_EDI_SRVY_L2_AMB-PM2",
  "contact": "Roy Torbert, Hans Vaith @ UNH",
  "resourceID": "https://doi.org/10.48322/ryg0-nd63",
  "additionalMetadata": {
    "name": "SPASE",
    "contentURL": "https://spase-metadata.org/NASA/NumericalData/MMS/4/FIELDS/EDI/Survey/Level2/ElectronFluxAmbient/ProjectionMethod2/PT0.03125S.html"
  },
  "parameters": [
    {
      "name": "Time",
      "type": "isotime",
      "units": "UTC",
      "length": 30,
      "fill": null,
      "x_description": "TT2000 time tags for EDU support data.",
      "x_cdf_NAME": "epoch_timetag",
      "x_cdf_DataType": "CDF_TIME_TT2000"
    },
    {
      "name": "mms4_edi_optics_state_srvy_l2",
      "type": "integer",
      "x_cdf_DataType": "CDF_UINT2",
      "description": "Optics state",
      "fill": "255",
      "units": null,
      "x_label": "Optics State",
      "x_cdf_FORMAT": "I4",
      "x_cdf_FIELDNAM": "Optics state",
      "x_cdf_DEPEND_0": "epoch_timetag"
    },
    {
      "name": "mms4_edi_energy_gdu1_srvy_l2",
      "type": "integer",
      "x_cdf_DataType": "CDF_UINT2",
      "description": "---> GDU1 energy",
      "fill": "65535",
      "units": "eV",
      "x_label": "GDU1 Energy",
      "x_cdf_FORMAT": "I4",
      "x_cdf_FIELDNAM": "GDU1 Energy",
      "x_cdf_DEPEND_0": "epoch_timetag"
    },
    {
      "name": "mms4_edi_energy_gdu2_srvy_l2",
      "type": "integer",
      "x_cdf_DataType": "CDF_UINT2",
      "description": "---> GDU2 energy",
      "fill": "65535",
      "units": "eV",
      "x_label": "GDU2 Energy",
      "x_cdf_FORMAT": "I4",
      "x_cdf_FIELDNAM": "GDU2 Energy",
      "x_cdf_DEPEND_0": "epoch_timetag"
    }
  ],
  "x_info_author": "bw",
  "x_cdaweb_hapi_version": "20260130.0606",
  "x_info_caching": false,
  "status": {
    "code": 1200,
    "message": "OK"
  },
  "HAPI": "3.2",
  "x_LastUpdate": "2026-04-12T15:11:39Z"
}