{
  "startDate": "1969-02-01T15:50:12Z",
  "stopDate": "1980-05-30T02:41:08Z",
  "sampleStartDate": "1979-01-19T19:50:50Z",
  "sampleStopDate": "1979-01-19T19:58:43Z",
  "cadence": "PT29S",
  "x_cadence_fraction": 0.36204651162790696,
  "x_cadence_note": "Counts based on variable 'Epoch' in https://cdaweb.gsfc.nasa.gov/sp_phys/data/isis/crc_ne_profile_cdf/isis1/1969/i1_neprof_tops_19690201_v01.cdf. The most common cadence, 29000 [ms] = PT29S, occurred for 36.2047% of the 1946 timesteps. ",
  "maxRequestDuration": "PT23650S",
  "resourceURL": "https://cdaweb.gsfc.nasa.gov/misc/NotesI.html#I1_NEPROF_TOPS",
  "contact": "J. E. Jackson @ Communication Research Centre (CRC), Ottawa",
  "resourceID": " ",
  "additionalMetadata": {
    "name": "SPASE",
    "contentURL": "https://spase-metadata.org/NASA/NumericalData/ISIS1/SFS/TOPS.html"
  },
  "parameters": [
    {
      "name": "Time",
      "type": "isotime",
      "units": "UTC",
      "length": 24,
      "fill": null,
      "x_description": "Time",
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      "x_cdf_DataType": "CDF_EPOCH"
    },
    {
      "name": "density",
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      "x_cdf_DataType": "CDF_REAL4",
      "description": "Topside electon density in cm-3 from F peak to orbit altitude",
      "fill": "-9999.0",
      "units": "cm-3",
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      "x_format": ".2f",
      "x_fractionDigits": "2",
      "x_cdf_FORMAT": "f11.2",
      "x_cdf_FIELDNAM": "Topside Ne in cm-3",
      "x_cdf_DISPLAY_TYPE": "default_dimension",
      "x_cdf_DEPEND_0": "Epoch",
      "size": [
        42
      ]
    },
    {
      "name": "log_density",
      "type": "double",
      "x_cdf_DataType": "CDF_REAL4",
      "description": "Logarithm (base 10) of topside Ne in cm-3",
      "fill": "-9.0",
      "units": " ",
      "x_label": "log(Ne/cm-3)",
      "x_format": ".4f",
      "x_fractionDigits": "4",
      "x_cdf_FORMAT": "f7.4",
      "x_cdf_FIELDNAM": "log(Ne/cm-3)",
      "x_cdf_DISPLAY_TYPE": "default_dimension",
      "x_cdf_DEPEND_0": "Epoch",
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      ]
    },
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      "name": "tec",
      "type": "double",
      "x_cdf_DataType": "CDF_REAL4",
      "description": "Total Electron Content in TECU (=1E16 m-2)",
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      "units": "1E16 m-2 ",
      "x_label": "TEC",
      "x_format": ".2f",
      "x_fractionDigits": "2",
      "x_cdf_FORMAT": "f6.2",
      "x_cdf_FIELDNAM": "TEC",
      "x_cdf_DEPEND_0": "Epoch"
    },
    {
      "name": "tec_iri",
      "type": "double",
      "x_cdf_DataType": "CDF_REAL4",
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      "fill": "-1.0E31",
      "units": "1.E16 m-2",
      "x_label": "TEC_IRI95",
      "x_format": ".2f",
      "x_fractionDigits": "2",
      "x_cdf_FORMAT": "f6.2",
      "x_cdf_FIELDNAM": "TEC_IRI95",
      "x_cdf_DEPEND_0": "Epoch"
    },
    {
      "name": "IRI_F2peak",
      "type": "double",
      "x_cdf_DataType": "CDF_REAL4",
      "description": "IRI-95 value for the natural logarithm of the F2 peak density in cm-3",
      "fill": "-1.0E31",
      "units": "IRI-95",
      "x_label": "ln(NmF2/cm-3)",
      "x_format": ".4f",
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      "x_cdf_FIELDNAM": "ln(NmF2_IRI/cm-3)",
      "x_cdf_DEPEND_0": "Epoch"
    },
    {
      "name": "IRI_F2peakHeight",
      "type": "double",
      "x_cdf_DataType": "CDF_REAL4",
      "description": "IRI-95 value for F2 peak height in km",
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    {
      "name": "qualityIndex",
      "type": "integer",
      "x_cdf_DataType": "CDF_INT2",
      "description": "Quality Index ( 0-best, 10-worst)",
      "fill": "-1",
      "units": " ",
      "x_label": "Quality Index",
      "x_cdf_FORMAT": "I2",
      "x_cdf_FIELDNAM": "Quality Index",
      "x_cdf_DEPEND_0": "Epoch"
    },
    {
      "name": "lon",
      "type": "double",
      "x_cdf_DataType": "CDF_REAL4",
      "description": "Longitude in degree (-180 to 180)",
      "fill": "-1.0E31",
      "units": "degree",
      "x_label": "Longitude",
      "x_format": ".1f",
      "x_fractionDigits": "1",
      "x_cdf_FORMAT": "f7.1",
      "x_cdf_FIELDNAM": "Longitude",
      "x_cdf_DEPEND_0": "Epoch"
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    {
      "name": "lat",
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      "description": "Latitude in degree",
      "fill": "-1.0E31",
      "units": "degree",
      "x_label": "Latitude",
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      "x_cdf_FIELDNAM": "Latitude",
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      "name": "dip",
      "type": "double",
      "x_cdf_DataType": "CDF_REAL4",
      "description": "Magnetic Inclination in degree",
      "fill": "-1.0E31",
      "units": "degree",
      "x_label": "Dip",
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      "type": "double",
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      "units": " ",
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    },
    {
      "name": "sza",
      "type": "double",
      "x_cdf_DataType": "CDF_REAL4",
      "description": "Solar zenith angle at 100 km",
      "fill": "-1.0E31",
      "units": "degree",
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      "x_cdf_FORMAT": "f7.2",
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    },
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      "name": "sunspotNumber",
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      "x_cdf_DataType": "CDF_INT2",
      "description": "12-month-running mean of sunspot number",
      "fill": "-1",
      "units": " ",
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      "x_cdf_FORMAT": "I3",
      "x_cdf_FIELDNAM": "Rz12",
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    },
    {
      "name": "IGindex",
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      "x_cdf_DataType": "CDF_INT2",
      "description": "12-month-running mean of IG ionosonde index",
      "fill": "-1",
      "units": " ",
      "x_label": "IG-12",
      "x_cdf_FORMAT": "I3",
      "x_cdf_FIELDNAM": "IG-12 index",
      "x_cdf_DEPEND_0": "Epoch"
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  ],
  "x_info_author": "bw",
  "x_cdaweb_hapi_version": "20260130.0606",
  "x_info_caching": false,
  "status": {
    "code": 1200,
    "message": "OK"
  },
  "HAPI": "3.2",
  "x_LastUpdate": "2026-04-12T15:10:18Z"
}