{
  "HAPI": "3.2",
  "x_description": "The DWP particle correlator data sets provide the result of the onboard autocorrelation of the PEACE HEEA count rate. Due to telemetry restrictions, only two of the possible 16 correlator energy channels are returned. One data set, PCOR_FX provides ACFs at a fixed energy whilst the other PCOR_ST data set (this file) steps through the remaining energy steps at a rate of one step per spin. The 32 ACF lag values provide count rate information in the range 1.4-41.6kHz at a particular energy. In normal mode, one ACF is produced every spin where as in burst modes there may be either 4, 8, or 16 ACFs per spin depending upon the WEC operational mode implemented. In addition to the ACF and energy, this data set also contains the HEEA polar sensor from which the data were collected, the azimuth of observations (BM only), the maximum and minimum pitch angles of the electrons recorded and an estimate of the count rate based on the ACF. For further details, the user is referred to the DWP User Manual, available from CSA,  which contains a complete description of all parameters within the data set as well as a list of the general caveats that apply to this data set.",
  "cadence": "PT4.000000S",
  "parameters": [
    {
      "type": "isotime",
      "units": "UTC",
      "name": "Time",
      "description": "Interval centred time tag",
      "label": "Universal Time",
      "length": 27,
      "fill": null
    },
    {
      "type": "double",
      "name": "Half_Interval",
      "description": "Half interval for data accumulation",
      "label": "Half interval",
      "units": "s",
      "fill": "-1.0"
    },
    {
      "type": "double",
      "name": "Look_Angle_Azimuth",
      "description": "PEACE azimuthal look direction for which ACF has been calculated",
      "label": "PEACE aimuthal look direction for which ACF has been calculated",
      "units": "degree",
      "fill": "-1.0"
    },
    {
      "type": "double",
      "name": "Half_Azimuth",
      "description": "Half azimuth angle over which ACF accumulated",
      "label": "Half azimuth angle over which ACF accumulated",
      "units": "degree",
      "fill": "-1.0"
    },
    {
      "type": "double",
      "name": "Look_Angle_Polar",
      "description": "PEACE polar look direction for which ACF has been calculated",
      "label": "PEACE polar look direction for which ACF has been calculated",
      "units": "degree",
      "fill": "-99.9"
    },
    {
      "type": "integer",
      "name": "EnergyBinNumber",
      "description": "Energy band (number) in which the electrons are correlated",
      "label": "Energy band number",
      "units": null,
      "fill": "-1"
    },
    {
      "type": "double",
      "name": "Energy",
      "description": "PEACE energy for which ACF has been calculated",
      "label": "PEACE energy for which ACF has been calculated",
      "units": "eV",
      "fill": "-1.0"
    },
    {
      "type": "integer",
      "name": "MCP_level",
      "description": "The PEACE HEEA MCP high voltage level setting",
      "label": "MCP level",
      "units": null,
      "fill": "-1"
    },
    {
      "type": "integer",
      "name": "NumberACFsummed",
      "description": "Number of PEACE sweeps summed in this accummulation",
      "label": "Number of ACFs summed over",
      "units": null,
      "fill": "-1"
    },
    {
      "type": "double",
      "name": "ACF",
      "description": "Electron count auto-correlation function",
      "label": "Auto-correlation function (32 lags) of electron counts",
      "units": "counts^2 per 12 microsecond accumulation bin",
      "fill": "-1.0",
      "bins": [
        {
          "name": "Lag_Time__C2_CP_DWP_PCOR_ST",
          "centers": [
            0,
            12,
            24,
            36,
            48,
            60,
            72,
            84,
            96,
            108,
            120,
            132,
            144,
            156,
            168,
            180,
            192,
            204,
            216,
            228,
            240,
            252,
            264,
            276,
            288,
            300,
            312,
            324,
            336,
            348,
            360,
            372
          ],
          "units": null
        }
      ],
      "size": [
        32
      ]
    },
    {
      "type": "double",
      "name": "CntRateEst",
      "description": "Estimated electron count rate",
      "label": "estimated electron count rate",
      "units": "counts s^-1",
      "fill": "-1.0"
    },
    {
      "type": "integer",
      "name": "MinPitchAngle",
      "description": "minimum pitch angle",
      "label": "min pitch angle",
      "units": "degree",
      "fill": "-1"
    },
    {
      "type": "integer",
      "name": "MaxPitchAngle",
      "description": "maximum pitch angle",
      "label": "max pitch angle",
      "units": "degree",
      "fill": "-1"
    },
    {
      "type": "double",
      "name": "Correl_Fisher_T",
      "description": "Fisher T statistic - max(power)/sum(power)",
      "label": "Fisher T",
      "units": null,
      "fill": "-1.0"
    },
    {
      "type": "double",
      "name": "Correl_Frequency",
      "description": "Frequency of maximum power",
      "label": "Frequency",
      "units": "Hz",
      "fill": "-1.0"
    },
    {
      "type": "double",
      "name": "Correl_Fisher_Significance",
      "description": "Fisher significance of spectral peak",
      "label": "Significance",
      "units": "(%)",
      "fill": "-1.0"
    },
    {
      "type": "double",
      "name": "Correl_IVar",
      "description": "Index of variation - (ZL-<NZL>)/count rate estimate",
      "label": "Index of Variation",
      "units": null,
      "fill": "-1.0"
    },
    {
      "type": "integer",
      "name": "Peace_mode",
      "description": "PEACE Mode 0 - FIX, 1 - LAR, 2 - MAR, 3 - HAR",
      "label": "PEACE mode",
      "units": null,
      "fill": "-1"
    }
  ],
  "startDate": "2000-10-01T00:00Z",
  "stopDate": "2024-10-01T00:00Z",
  "x_tap_url": "https://csa.esac.esa.int/csa-sl-tap/data?retrieval_type=HEADER&DATASET_ID=C2_CP_DWP_PCOR_ST&FORCEPACK=false",
  "sampleStartDate": "2021-05-30T12:00Z",
  "sampleStopDate": "2021-05-31T19:00Z",
  "x_tap_data_url": "https://csa.esac.esa.int/csa-sl-tap/data?RETRIEVAL_TYPE=product&RETRIEVAL_ACCESS=streamed&DATASET_ID=C2_CP_DWP_PCOR_ST&START_DATE=2021-05-30T12:00:00.000Z&END_DATE=2021-05-31T19:00:00.000Z",
  "status": {
    "code": 1200,
    "message": "OK"
  },
  "x_LastUpdate": "2026-04-12T15:14:07Z"
}