{
  "startDate": "1981-08-06T17:07:01Z",
  "stopDate": "1983-02-16T13:04:19Z",
  "sampleStartDate": "1983-02-15T01:38:12Z",
  "sampleStopDate": "1983-02-15T22:55:47Z",
  "cadence": "PT4S",
  "x_cadence_fraction": 0.9657534246575342,
  "x_cadence_note": "Counts based on variable 'Epoch' in https://cdaweb.gsfc.nasa.gov/sp_phys/data/de/de2/plasma_rpa/ion2s_cdaweb/1981/de2_ion2s_rpa_19810806_v01.cdf. The most common cadence, 4000 [ms] = PT4S, occurred for 96.5753% of the 141 timesteps. ",
  "maxRequestDuration": "PT3832750S",
  "resourceURL": "https://cdaweb.gsfc.nasa.gov/misc/NotesD.html#DE2_ION2S_RPA",
  "contact": "Rod Heelis @ University of Texas, Dallas",
  "resourceID": "https://doi.org/10.48322/41b3-kz41",
  "additionalMetadata": {
    "name": "SPASE",
    "contentURL": "https://spase-metadata.org/NASA/NumericalData/DE2/RPA/PT2S.html"
  },
  "parameters": [
    {
      "name": "Time",
      "type": "isotime",
      "units": "UTC",
      "length": 24,
      "fill": null,
      "x_description": "NSSDC standard-reference time value. ",
      "x_cdf_NAME": "Epoch",
      "x_cdf_DataType": "CDF_EPOCH"
    },
    {
      "name": "x",
      "type": "double",
      "x_cdf_DataType": "CDF_REAL4",
      "description": "x component of ion velocity in s/c coordinates (vx) - vx is app. parallel to s/c direction of motion",
      "fill": "0.0",
      "units": "m/s",
      "x_label": "v_x s/c coord",
      "x_format": ".2f",
      "x_fractionDigits": "2",
      "x_cdf_FORMAT": "f7.2",
      "x_cdf_FIELDNAM": "x component of ion velocity",
      "x_cdf_DISPLAY_TYPE": "default_dimension",
      "x_cdf_DEPEND_0": "Epoch"
    },
    {
      "name": "y",
      "type": "double",
      "x_cdf_DataType": "CDF_REAL4",
      "description": "Y component of ion velocity in s/c coordinates (vy) - vy is app. vertical to s/c dir. of motion (>0 up)",
      "fill": "0.0",
      "units": "m/s",
      "x_label": "v_y s/c coord",
      "x_format": ".2f",
      "x_fractionDigits": "2",
      "x_cdf_FORMAT": "f7.2",
      "x_cdf_FIELDNAM": "y component of ion velocity",
      "x_cdf_DISPLAY_TYPE": "default_dimension",
      "x_cdf_DEPEND_0": "Epoch"
    },
    {
      "name": "z",
      "type": "double",
      "x_cdf_DataType": "CDF_REAL4",
      "description": "z component of ion velocity in s/c coordinates (vz) - vz is app. vertical to s/c dir. of motion (>0 right)",
      "fill": "0.0",
      "units": "m/s",
      "x_label": "v_z s/c coord",
      "x_format": ".2f",
      "x_fractionDigits": "2",
      "x_cdf_FORMAT": "f7.2",
      "x_cdf_FIELDNAM": "z component of ion velocity",
      "x_cdf_DISPLAY_TYPE": "default_dimension",
      "x_cdf_DEPEND_0": "Epoch"
    },
    {
      "name": "ionTemperature",
      "type": "double",
      "x_cdf_DataType": "CDF_REAL4",
      "description": "Ion temperature in degree Kelvin",
      "fill": "0.0",
      "units": "K",
      "x_label": "Ion temperature",
      "x_format": ".2f",
      "x_fractionDigits": "2",
      "x_cdf_FORMAT": "f9.2",
      "x_cdf_FIELDNAM": "Ion temperature",
      "x_cdf_DISPLAY_TYPE": "default_dimension",
      "x_cdf_DEPEND_0": "Epoch"
    },
    {
      "name": "ionDensity",
      "type": "double",
      "x_cdf_DataType": "CDF_REAL4",
      "description": "Total ion density (all ions) in ions per cm^3 ",
      "fill": "0.0",
      "units": "cm^-3",
      "x_label": "Total ion dens.",
      "x_format": ".2f",
      "x_fractionDigits": "2",
      "x_cdf_FORMAT": "f11.2",
      "x_cdf_FIELDNAM": "Ion density",
      "x_cdf_DISPLAY_TYPE": "default_dimension",
      "x_cdf_DEPEND_0": "Epoch"
    },
    {
      "name": "O",
      "type": "double",
      "x_cdf_DataType": "CDF_REAL4",
      "description": "O+ density in ions per cm^3",
      "fill": "0.0",
      "units": "cm^-3",
      "x_label": "O+ density",
      "x_format": ".2f",
      "x_fractionDigits": "2",
      "x_cdf_FORMAT": "f11.2",
      "x_cdf_FIELDNAM": "O+ density",
      "x_cdf_DISPLAY_TYPE": "default_dimension",
      "x_cdf_DEPEND_0": "Epoch"
    },
    {
      "name": "H",
      "type": "double",
      "x_cdf_DataType": "CDF_REAL4",
      "description": "H+ density in ions per cm^3",
      "fill": "0.0",
      "units": "cm^-3",
      "x_label": "H+ density",
      "x_format": ".2f",
      "x_fractionDigits": "2",
      "x_cdf_FORMAT": "f11.2",
      "x_cdf_FIELDNAM": "H+ density",
      "x_cdf_DISPLAY_TYPE": "default_dimension",
      "x_cdf_DEPEND_0": "Epoch"
    },
    {
      "name": "He",
      "type": "double",
      "x_cdf_DataType": "CDF_REAL4",
      "description": "He+ density in ions per cm^3",
      "fill": "0.0",
      "units": "cm^-3",
      "x_label": "He+ density",
      "x_format": ".2f",
      "x_fractionDigits": "2",
      "x_cdf_FORMAT": "f11.2",
      "x_cdf_FIELDNAM": "He+ density",
      "x_cdf_DISPLAY_TYPE": "default_dimension",
      "x_cdf_DEPEND_0": "Epoch"
    },
    {
      "name": "molecularIons",
      "type": "double",
      "x_cdf_DataType": "CDF_REAL4",
      "description": "Molecular ion density in ions per cm^3",
      "fill": "0.0",
      "units": "cm^-3",
      "x_label": "Molec. ions dens.",
      "x_format": ".2f",
      "x_fractionDigits": "2",
      "x_cdf_FORMAT": "f11.2",
      "x_cdf_FIELDNAM": "molecular ion density",
      "x_cdf_DISPLAY_TYPE": "default_dimension",
      "x_cdf_DEPEND_0": "Epoch"
    },
    {
      "name": "highMass",
      "type": "double",
      "x_cdf_DataType": "CDF_REAL4",
      "description": "High mass ion density in ions per cm^3",
      "fill": "0.0",
      "units": "cm^-3",
      "x_label": "High mass ion den",
      "x_format": ".2f",
      "x_fractionDigits": "2",
      "x_cdf_FORMAT": "f11.2",
      "x_cdf_FIELDNAM": "high mass ion density",
      "x_cdf_DISPLAY_TYPE": "default_dimension",
      "x_cdf_DEPEND_0": "Epoch"
    },
    {
      "name": "sigma",
      "type": "double",
      "x_cdf_DataType": "CDF_REAL4",
      "description": "Sigma - RMS error of RPA analysis in percent",
      "fill": "0.0",
      "units": "%",
      "x_label": "Sigma RMS-RPA",
      "x_format": ".0f",
      "x_fractionDigits": "0",
      "x_cdf_FORMAT": "f4.0",
      "x_cdf_FIELDNAM": "sigma -RMS error of RPA analysis",
      "x_cdf_DISPLAY_TYPE": "default_dimension",
      "x_cdf_DEPEND_0": "Epoch"
    },
    {
      "name": "scPotential",
      "type": "double",
      "x_cdf_DataType": "CDF_REAL4",
      "description": "Spacecraft potential in Volts",
      "fill": "0.0",
      "units": "Volts",
      "x_label": "s/c potential",
      "x_format": ".2f",
      "x_fractionDigits": "2",
      "x_cdf_FORMAT": "f9.2",
      "x_cdf_FIELDNAM": "Spacecraft potential",
      "x_cdf_DISPLAY_TYPE": "default_dimension",
      "x_cdf_DEPEND_0": "Epoch"
    },
    {
      "name": "dataQuality",
      "type": "integer",
      "x_cdf_DataType": "CDF_INT4",
      "description": "Data quality flag (<0 untrustworthy, see https://spdf.gsfc.nasa.gov/pub/data/de/de2/plasma_rpa/",
      "fill": "-1",
      "units": "( < 0 fails)",
      "x_label": "Quality Flag",
      "x_cdf_FORMAT": "i3",
      "x_cdf_FIELDNAM": "Quality Flag",
      "x_cdf_DISPLAY_TYPE": "default_dimension",
      "x_cdf_DEPEND_0": "Epoch"
    },
    {
      "name": "sweepType",
      "type": "double",
      "x_cdf_DataType": "CDF_REAL4",
      "description": "Sweep type (1: 0->10Volt, 2: 0-10V, 3: 0-8V Integral, 4: 0-8V Electronic",
      "fill": "0.0",
      "units": "(1-4)",
      "x_label": "Sweep type",
      "x_format": ".0f",
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      "name": "glat",
      "type": "double",
      "x_cdf_DataType": "CDF_REAL4",
      "description": "Geographic Latitude in degrees",
      "fill": "0.0",
      "units": "deg",
      "x_label": "Geog Latitude",
      "x_format": ".2f",
      "x_fractionDigits": "2",
      "x_cdf_FORMAT": "f6.2",
      "x_cdf_FIELDNAM": "Geographic Latitude",
      "x_cdf_DISPLAY_TYPE": "default_dimension",
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    {
      "name": "glon",
      "type": "double",
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      "description": "Geographic Longitude in degrees",
      "fill": "0.0",
      "units": "deg",
      "x_label": "Geog Longitude",
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      "name": "ilat",
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      "description": "Invariant Latitude in degrees",
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      "fill": "0.0",
      "units": "hr",
      "x_label": "MLT",
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    {
      "name": "alt",
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      "description": "Altitude in km",
      "fill": "0.0",
      "units": "km",
      "x_label": "Altitude",
      "x_format": ".2f",
      "x_fractionDigits": "2",
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  ],
  "x_info_author": "bw",
  "x_cdaweb_hapi_version": "20260130.0606",
  "x_info_caching": false,
  "status": {
    "code": 1200,
    "message": "OK"
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  "HAPI": "3.2",
  "x_LastUpdate": "2026-04-12T15:09:46Z"
}