{
  "startDate": "2006-11-08T17:33:48Z",
  "stopDate": "2025-08-02T00:49:47Z",
  "sampleStartDate": "2025-08-01T19:55:34Z",
  "sampleStopDate": "2025-08-01T21:26:07Z",
  "cadence": "PT1S",
  "x_cadence_fraction": 0.9998321866084914,
  "x_cadence_note": "Counts based on variable 'Epoch' in https://cdaweb.gsfc.nasa.gov/sp_phys/data/dmsp/dmspf17/ssies/ssies-3rl/thermal-plasma-cdf/2006/dmsp-f17_ssies-3_thermal-plasma_200611081733_v01.cdf. The most common cadence, 1000 [ms] = PT1S, occurred for 99.9832% of the 5958 timesteps. ",
  "maxRequestDuration": "PT271650S",
  "resourceURL": "https://cdaweb.gsfc.nasa.gov/misc/NotesD.html#DMSP-F17_SSIES-3_THERMAL-PLASMA",
  "contact": "William Hanson, Rod Heelis, Marc Hairston @ University of Texas Dallas, Center for Space Sciences",
  "resourceID": "https://doi.org/10.48322/3skz-xt83",
  "additionalMetadata": {
    "name": "SPASE",
    "contentURL": "https://spase-metadata.org/NASA/NumericalData/DMSP_5D-3/F17/SESS/SSIES-3/ThermalPlasma/CDF/PT1S.html"
  },
  "parameters": [
    {
      "name": "Time",
      "type": "isotime",
      "units": "UTC",
      "length": 24,
      "fill": null,
      "x_description": "Default time",
      "x_cdf_NAME": "Epoch",
      "x_cdf_DataType": "CDF_EPOCH"
    },
    {
      "name": "vx",
      "type": "double",
      "x_cdf_DataType": "CDF_FLOAT",
      "description": "Vx - median filtered and smoothed ion flow in the ram direction",
      "fill": "-999999.0",
      "units": "m/s",
      "x_label": "vx",
      "x_format": ".0f",
      "x_fractionDigits": "0",
      "x_cdf_FORMAT": "F8.0",
      "x_cdf_FIELDNAM": "vx",
      "x_cdf_DEPEND_0": "Epoch"
    },
    {
      "name": "vxrms",
      "type": "double",
      "x_cdf_DataType": "CDF_FLOAT",
      "description": "----> Vx root mean square of the RPA fit",
      "fill": "-999999.0",
      "units": " ",
      "x_label": "vx rms",
      "x_format": ".2f",
      "x_fractionDigits": "2",
      "x_cdf_FORMAT": "F10.2",
      "x_cdf_FIELDNAM": "vx rms",
      "x_cdf_DEPEND_0": "Epoch"
    },
    {
      "name": "vxraw",
      "type": "double",
      "x_cdf_DataType": "CDF_FLOAT",
      "description": "Vx - original unfiltered Vx flow",
      "fill": "-999999.0",
      "units": "m/s",
      "x_label": "Vx flow",
      "x_format": ".0f",
      "x_fractionDigits": "0",
      "x_cdf_FORMAT": "F8.0",
      "x_cdf_FIELDNAM": "Vx flow",
      "x_cdf_DEPEND_0": "Epoch"
    },
    {
      "name": "vy",
      "type": "double",
      "x_cdf_DataType": "CDF_FLOAT",
      "description": "Vy - ion flow in the horizontal crosstrack direction",
      "fill": "-999999.0",
      "units": "m/s",
      "x_label": "vy",
      "x_format": ".0f",
      "x_fractionDigits": "0",
      "x_cdf_FORMAT": "F8.0",
      "x_cdf_FIELDNAM": "vy",
      "x_cdf_DEPEND_0": "Epoch"
    },
    {
      "name": "vyrms",
      "type": "double",
      "x_cdf_DataType": "CDF_FLOAT",
      "description": "----> standard deviation of the Vy flow",
      "fill": "-999999.0",
      "units": "m/s",
      "x_label": "vy rms",
      "x_format": ".2f",
      "x_fractionDigits": "2",
      "x_cdf_FORMAT": "F10.2",
      "x_cdf_FIELDNAM": "vy rms",
      "x_cdf_DEPEND_0": "Epoch"
    },
    {
      "name": "dmhrough",
      "type": "double",
      "x_cdf_DataType": "CDF_FLOAT",
      "description": "----> roughness parameter of Vy",
      "fill": "-999999.0",
      "units": " ",
      "x_label": "roughness Vy",
      "x_format": ".3f",
      "x_fractionDigits": "3",
      "x_cdf_FORMAT": "F11.3",
      "x_cdf_FIELDNAM": "roughness Vy",
      "x_cdf_DEPEND_0": "Epoch"
    },
    {
      "name": "vz",
      "type": "double",
      "x_cdf_DataType": "CDF_FLOAT",
      "description": "Vz - ion flow in the vertical crosstrack direction ",
      "fill": "-999999.0",
      "units": "m/s",
      "x_label": "vz",
      "x_format": ".0f",
      "x_fractionDigits": "0",
      "x_cdf_FORMAT": "F8.0",
      "x_cdf_FIELDNAM": "vz",
      "x_cdf_DEPEND_0": "Epoch"
    },
    {
      "name": "vzrms",
      "type": "double",
      "x_cdf_DataType": "CDF_FLOAT",
      "description": "----> standard deviation of the Vz flow",
      "fill": "-999999.0",
      "units": "m/s",
      "x_label": "stdev vz rms",
      "x_format": ".2f",
      "x_fractionDigits": "2",
      "x_cdf_FORMAT": "F10.2",
      "x_cdf_FIELDNAM": "stdev vz rms",
      "x_cdf_DEPEND_0": "Epoch"
    },
    {
      "name": "dmvrough",
      "type": "double",
      "x_cdf_DataType": "CDF_FLOAT",
      "description": "----> roughness parameter of Vz (delta Vz / averaged Vz)",
      "fill": "-999999.0",
      "units": " ",
      "x_label": "roughness Vz",
      "x_format": ".3f",
      "x_fractionDigits": "3",
      "x_cdf_FORMAT": "F11.3",
      "x_cdf_FIELDNAM": "roughness Vz",
      "x_cdf_DEPEND_0": "Epoch"
    },
    {
      "name": "temp",
      "type": "double",
      "x_cdf_DataType": "CDF_FLOAT",
      "description": "ion temperature",
      "fill": "-999999.0",
      "units": "deg k",
      "x_label": "ion temperature",
      "x_format": ".0f",
      "x_fractionDigits": "0",
      "x_cdf_FORMAT": "F8.0",
      "x_cdf_FIELDNAM": "ion temperature",
      "x_cdf_DEPEND_0": "Epoch"
    },
    {
      "name": "te",
      "type": "double",
      "x_cdf_DataType": "CDF_FLOAT",
      "description": "electron temperature",
      "fill": "-999999.0",
      "units": "deg k",
      "x_label": "electron temperature",
      "x_format": ".0f",
      "x_fractionDigits": "0",
      "x_cdf_FORMAT": "F8.0",
      "x_cdf_FIELDNAM": "electron temperature",
      "x_cdf_DEPEND_0": "Epoch"
    },
    {
      "name": "dens",
      "type": "double",
      "x_cdf_DataType": "CDF_FLOAT",
      "description": "Ni calculated from the RPA",
      "fill": "-999999.0",
      "units": "Ions/cc",
      "x_label": "ion density",
      "x_format": ".0f",
      "x_fractionDigits": "0",
      "x_cdf_FORMAT": "F8.0",
      "x_cdf_FIELDNAM": "ion density",
      "x_cdf_DEPEND_0": "Epoch"
    },
    {
      "name": "ductdens",
      "type": "double",
      "x_cdf_DataType": "CDF_FLOAT",
      "description": "Ni from scintillation meter",
      "fill": "-999999.0",
      "units": "ions/cc",
      "x_label": "ion density scint meter",
      "x_format": ".0f",
      "x_fractionDigits": "0",
      "x_cdf_FORMAT": "F8.0",
      "x_cdf_FIELDNAM": "ion density scint meter",
      "x_cdf_DEPEND_0": "Epoch"
    },
    {
      "name": "ductdensrough",
      "type": "double",
      "x_cdf_DataType": "CDF_FLOAT",
      "description": "----> roughness parameter of SM density",
      "fill": "-999999.0",
      "units": " ",
      "x_label": "roughness SM den",
      "x_format": ".3f",
      "x_fractionDigits": "3",
      "x_cdf_FORMAT": "F11.3",
      "x_cdf_FIELDNAM": "roughness SM den",
      "x_cdf_DEPEND_0": "Epoch"
    },
    {
      "name": "dens0v",
      "type": "double",
      "x_cdf_DataType": "CDF_FLOAT",
      "description": "Ni measured from the RPA at 0 volts",
      "fill": "-999999.0",
      "units": "ions/cc",
      "x_label": "ion density RPA 0 volts",
      "x_format": ".0f",
      "x_fractionDigits": "0",
      "x_cdf_FORMAT": "F8.0",
      "x_cdf_FIELDNAM": "ion density RPA 0 volts",
      "x_cdf_DEPEND_0": "Epoch"
    },
    {
      "name": "dmdens",
      "type": "double",
      "x_cdf_DataType": "CDF_FLOAT",
      "description": "Ni from the IDM",
      "fill": "-999999.0",
      "units": "ions/cc",
      "x_label": "ion density IDM",
      "x_format": ".0f",
      "x_fractionDigits": "0",
      "x_cdf_FORMAT": "F8.0",
      "x_cdf_FIELDNAM": "ion density IDM",
      "x_cdf_DEPEND_0": "Epoch"
    },
    {
      "name": "frach",
      "type": "double",
      "x_cdf_DataType": "CDF_FLOAT",
      "description": "fractional amount of H+ ions in plasma",
      "fill": "-999999.0",
      "units": " ",
      "x_label": "frac H+ ions in plasma",
      "x_format": ".2f",
      "x_fractionDigits": "2",
      "x_cdf_FORMAT": "F10.2",
      "x_cdf_FIELDNAM": "frac H+ ions in plasma",
      "x_cdf_DEPEND_0": "Epoch"
    },
    {
      "name": "frache",
      "type": "double",
      "x_cdf_DataType": "CDF_FLOAT",
      "description": "fractional amount of He+ ions in plasma",
      "fill": "-999999.0",
      "units": " ",
      "x_label": "frac He+ ions in plasma",
      "x_format": ".2f",
      "x_fractionDigits": "2",
      "x_cdf_FORMAT": "F10.2",
      "x_cdf_FIELDNAM": "frac He+ ions in plasma",
      "x_cdf_DEPEND_0": "Epoch"
    },
    {
      "name": "fraco",
      "type": "double",
      "x_cdf_DataType": "CDF_FLOAT",
      "description": "fractional amount of O+ ions in plasma",
      "fill": "-999999.0",
      "units": " ",
      "x_label": "frac O+ ions in plasma",
      "x_format": ".2f",
      "x_fractionDigits": "2",
      "x_cdf_FORMAT": "F10.2",
      "x_cdf_FIELDNAM": "frac O+ ions in plasma",
      "x_cdf_DEPEND_0": "Epoch"
    },
    {
      "name": "ebm",
      "type": "double",
      "x_cdf_DataType": "CDF_FLOAT",
      "description": "electron background monitor - high energy particle currents detected by the RPA ",
      "fill": "-999999.0",
      "units": "Amps",
      "x_label": "high energy particles",
      "x_format": ".3f",
      "x_fractionDigits": "3",
      "x_cdf_FORMAT": "F11.3",
      "x_cdf_FIELDNAM": "high energy particles",
      "x_cdf_DEPEND_0": "Epoch"
    },
    {
      "name": "nmbot",
      "type": "double",
      "x_cdf_DataType": "CDF_FLOAT",
      "description": "number of data points in the Vy - Vz average",
      "fill": "-999999.0",
      "units": "1-slow mode,6-normal mode",
      "x_label": "#pts vy-vz",
      "x_format": ".0f",
      "x_fractionDigits": "0",
      "x_cdf_FORMAT": "F8.0",
      "x_cdf_FIELDNAM": "#pts vy-vz",
      "x_cdf_DEPEND_0": "Epoch"
    },
    {
      "name": "scvel",
      "type": "double",
      "x_cdf_DataType": "CDF_FLOAT",
      "description": "spacecraft velocity",
      "fill": "-999999.0",
      "units": "km/s",
      "x_label": "spacecraft velocity",
      "x_format": ".1f",
      "x_fractionDigits": "1",
      "x_cdf_FORMAT": "F9.1",
      "x_cdf_FIELDNAM": "spacecraft velocity",
      "x_cdf_DEPEND_0": "Epoch"
    },
    {
      "name": "rpaground",
      "type": "double",
      "x_cdf_DataType": "CDF_FLOAT",
      "description": "potential difference between SSIES instruments and spacecraft ground",
      "fill": "-999999.0",
      "units": "deg k",
      "x_label": "rpaground",
      "x_format": ".0f",
      "x_fractionDigits": "0",
      "x_cdf_FORMAT": "F8.0",
      "x_cdf_FIELDNAM": "rpaground",
      "x_cdf_DEPEND_0": "Epoch"
    },
    {
      "name": "pot",
      "type": "double",
      "x_cdf_DataType": "CDF_FLOAT",
      "description": "potential of the SSIES instruments relative to the plasma ground",
      "fill": "-999999.0",
      "units": "volts",
      "x_label": "potential",
      "x_format": ".2f",
      "x_fractionDigits": "2",
      "x_cdf_FORMAT": "F10.2",
      "x_cdf_FIELDNAM": "potential",
      "x_cdf_DEPEND_0": "Epoch"
    },
    {
      "name": "bx",
      "type": "double",
      "x_cdf_DataType": "CDF_FLOAT",
      "description": "north component of Earths magnetic field (IGRF)",
      "fill": "-999999.0",
      "units": "nT",
      "x_label": "bx",
      "x_format": ".1f",
      "x_fractionDigits": "1",
      "x_cdf_FORMAT": "F9.1",
      "x_cdf_FIELDNAM": "bx",
      "x_cdf_DEPEND_0": "Epoch"
    },
    {
      "name": "by",
      "type": "double",
      "x_cdf_DataType": "CDF_FLOAT",
      "description": "east component of Earths magnetic field (IGRF)",
      "fill": "-999999.0",
      "units": "nT",
      "x_label": "by",
      "x_format": ".1f",
      "x_fractionDigits": "1",
      "x_cdf_FORMAT": "F9.1",
      "x_cdf_FIELDNAM": "by",
      "x_cdf_DEPEND_0": "Epoch"
    },
    {
      "name": "bz",
      "type": "double",
      "x_cdf_DataType": "CDF_FLOAT",
      "description": "vertical downward component of Earths magnetic field (IGRF)",
      "fill": "-999999.0",
      "units": "nT",
      "x_label": "bz",
      "x_format": ".1f",
      "x_fractionDigits": "1",
      "x_cdf_FORMAT": "F9.1",
      "x_cdf_FIELDNAM": "bz",
      "x_cdf_DEPEND_0": "Epoch"
    },
    {
      "name": "corvelx",
      "type": "double",
      "x_cdf_DataType": "CDF_FLOAT",
      "description": "corotation velocity of ionosphere in the ram direction ",
      "fill": "-999999.0",
      "units": "m/s",
      "x_label": "corotation vel ram",
      "x_format": ".1f",
      "x_fractionDigits": "1",
      "x_cdf_FORMAT": "F9.1",
      "x_cdf_FIELDNAM": "corotation vel ram",
      "x_cdf_DEPEND_0": "Epoch"
    },
    {
      "name": "corvely",
      "type": "double",
      "x_cdf_DataType": "CDF_FLOAT",
      "description": "corotation velocity of ionosphere in the horizontal crosstrack direction ",
      "fill": "-999999.0",
      "units": "m/s",
      "x_label": "corotation vel crosstrack",
      "x_format": ".1f",
      "x_fractionDigits": "1",
      "x_cdf_FORMAT": "F9.1",
      "x_cdf_FIELDNAM": "corotation vel crosstrack",
      "x_cdf_DEPEND_0": "Epoch"
    },
    {
      "name": "corvelz",
      "type": "double",
      "x_cdf_DataType": "CDF_FLOAT",
      "description": "corotation velocity of ionosphere in the vertical direction ",
      "fill": "-999999.0",
      "units": "m/s",
      "x_label": "corotation vel vertical",
      "x_format": ".1f",
      "x_fractionDigits": "1",
      "x_cdf_FORMAT": "F9.1",
      "x_cdf_FIELDNAM": "corotation vel vertical",
      "x_cdf_DEPEND_0": "Epoch"
    }
  ],
  "x_info_author": "bw",
  "x_cdaweb_hapi_version": "20260130.0606",
  "x_info_caching": false,
  "status": {
    "code": 1200,
    "message": "OK"
  },
  "HAPI": "3.2",
  "x_LastUpdate": "2026-04-14T15:09:49Z"
}