{
  "HAPI": "3.2",
  "x_description": "For DSDS, FGM provides a status word, the three averaged components of the magnetic field\nvector in the GSE coordinate system and 2 variances (summed and magnitude). The averaging\nperiods for FGM vectors always conform with DSDS conventions. This applies in particular for\nthe timing of spin periods. The variances are calculated for each averaging period.",
  "cadence": "PT4.000000S",
  "parameters": [
    {
      "type": "isotime",
      "units": "UTC",
      "name": "time_tags",
      "description": "Interval centred time tag rounded to nearest msecond",
      "label": "Time tags",
      "length": 24,
      "fill": null
    },
    {
      "type": "double",
      "name": "Half_interval",
      "description": "Half width of measurement interval",
      "label": "Half interval",
      "units": "ms",
      "x_constant": "30",
      "fill": "-1e+31"
    },
    {
      "type": "integer",
      "name": "Status",
      "description": "FGM status",
      "label": "FGM status",
      "units": null,
      "fill": "65535",
      "size": [
        4
      ]
    },
    {
      "type": "double",
      "name": "B_xyz_gse",
      "description": "FGM DC magnetic field, interval centred data from primary sensor",
      "label": "FGM DC magnetic field",
      "units": "nT",
      "fill": "-1e+31",
      "size": [
        3
      ]
    },
    {
      "type": "double",
      "name": "B_nsigma_t",
      "description": "Normalised magnetic variance: summed component variances",
      "label": "Magnetic variance: summed",
      "units": null,
      "fill": "-1e+31"
    },
    {
      "type": "double",
      "name": "B_nsigma_b",
      "description": "Normalised magnetic variance: magnitude",
      "label": "Magnetic variance: magnitude",
      "units": null,
      "fill": "-1e+31"
    }
  ],
  "startDate": "2004-01-08T00:00Z",
  "stopDate": "2007-09-20T00:00Z",
  "x_tap_url": "https://csa.esac.esa.int/csa-sl-tap/data?retrieval_type=HEADER&DATASET_ID=D1_SP_FGM&FORCEPACK=false",
  "sampleStartDate": "2007-09-19T21:00Z",
  "sampleStopDate": "2007-09-19T23:00Z",
  "x_tap_data_url": "https://csa.esac.esa.int/csa-sl-tap/data?RETRIEVAL_TYPE=product&RETRIEVAL_ACCESS=streamed&DATASET_ID=D1_SP_FGM&START_DATE=2007-09-19T21:00:00.000Z&END_DATE=2007-09-19T23:00:00.000Z",
  "status": {
    "code": 1200,
    "message": "OK"
  },
  "x_LastUpdate": "2026-04-12T15:13:21Z"
}