{
  "HAPI": "3.3.1",
  "status": {
    "code": 1200,
    "message": "OK"
  },
  "startDate": "1978-01-01T00:00:00Z",
  "stopDate": "1994-01-01T00:00:00Z",
  "cadence": "PT1S",
  "timeStampLocation": "center",
  "modificationDate": "2026-08-29T16:27:02Z",
  "maxRequestDuration": "P3D",
  "title": "Port Aux Francais Observatory (Definitive, 1-second)",
  "description": "Port Aux Francais (PAF) 1-second geomagnetic field, served as the components natively reported in the source. Timestamps are bin centers (timeStampLocation=center). Definitive version.",
  "licenseURL": "https://wdc.kugi.kyoto-u.ac.jp/wdc/Sec3.html",
  "x_observatory": {
    "name": "Port Aux Francais",
    "iagaCode": "PAF",
    "latitude": -49.35,
    "longitude": 70.26,
    "elevation": 35,
    "country": "France"
  },
  "x_sourceMetadata": [
    {
      "startDate": "1978-01-01T00:00:00Z",
      "stopDate": "1994-01-01T00:00:00Z",
      "sourceOfData": "EOST",
      "sensorOrientation": "HDZ",
      "digitalSampling": "2-seconds",
      "dataIntervalType": "1-second",
      "dataType": "Definitive"
    }
  ],
  "x_sourceComments": [
    {
      "startDate": "1978-01-01T00:00:00Z",
      "stopDate": "1989-12-31T00:00:00Z",
      "comments": [
        " By the courtesy of EOST (Ecole et Observatoire des Sciences de la",
        " Terre) and Drs. J. Bitterly and M. Bitterly, 2 sec sampled",
        " geomagnetic data observed at Crozet and Port Aux Francais with",
        " fluxgate magnetometers having the resolution of 0.1 nT are",
        " provided to WDC for Geomagnetism, Kyoto. Please make an",
        " acknowledgment to the EOST when you use the data for any",
        " publication.",
        " To utilize the software for other high-time resolution data of",
        " 1 sec resolution, we modified the data format and made the data",
        " with apparently 1 sec resolution by duplicating each data point.",
        " The fluxgate magnetometer data have no base-line values and are",
        " recorded in sensor coordinates (HEZ). Then the data are processed",
        " as follows.",
        " (1) In a given year, we calculate mean value of each component",
        "     during 60 quiet days (5 quietest days in 12 months), which is",
        "     designated to be Hm, Em, or Zm.",
        " (2) Deviation from the mean value is calculated, that is, dH=H-Hm,",
        "     dE=E-Em, and dZ=Z-Zm.",
        " (3) The annual mean value of the year (Ha, Da, and Za) is used in",
        "     conversion to XYZ coordinates by the following equation.",
        "     X=(dH+Ha)cos(Da)-dEsin(Da)",
        "     Y=(dH+Ha)sin(Da)+dEcos(Da)",
        "     Z=dZ+Za",
        " Therefore, if exact absolute values are necessary, please use the",
        " one minute or hourly values. For more detailed information, please",
        " look at the original document at",
        " http://wdc.kugi.kyoto-u.ac.jp/shplt/cat2sec.pdf.",
        "",
        " We noticed that variations at PAF seem larger by a factor of >2",
        " than what are expected. Users should be careful in interpretation",
        " of the variations at PAF."
      ]
    },
    {
      "startDate": "1990-01-01T00:00:00Z",
      "stopDate": "1994-01-01T00:00:00Z",
      "comments": [
        " By the courtesy of EOST (Ecole et Observatoire des Sciences de la",
        " Terre) and Drs. J. Bitterly and M. Bitterly, 2 sec sampled",
        " geomagnetic data observed at Crozet (CZT) and Port Aux Francais",
        " (PAF) with fluxgate magnetometers having the resolution of 0.1 nT",
        " are provided to WDC for Geomagnetism, Kyoto. Please make an",
        " acknowledgment to the EOST when you use the data for any",
        " publication.",
        " To utilize softwares for other high-time resolution data of",
        " 1 sec resolution, we modified the data format and made the data",
        " with apparently 1 sec resolution by duplicating each data point.",
        " The fluxgate magnetometer data have no base-line values and are",
        " recorded in sensor coordinates (HEZ). Then we simply added the",
        " annual mean values of the year at each station and converted into",
        " XYZ coordinates.",
        " Therefore, if exact absolute values are necessary, please use the",
        " one minute or hourly values. For more detailed information, please",
        " look at the original document at",
        " http://wdc.kugi.kyoto-u.ac.jp/shplt/cat2sec.pdf.",
        "",
        " We noticed that variations at PAF seem larger by a factor of >2",
        " than what are expected. Users should be careful in interpretation",
        " of the variations at PAF."
      ]
    }
  ],
  "parameters": [
    {
      "name": "Time",
      "type": "isotime",
      "units": "UTC",
      "fill": null,
      "length": 24,
      "label": "Time"
    },
    {
      "name": "geomagneticFieldD",
      "type": "double",
      "units": "arcmin",
      "fill": "99999.0",
      "label": "D",
      "description": "Geomagnetic declination (eastward+), minutes of arc. Native when reported (horizontal reported as D,H); else fill.",
      "x_digits": 3
    },
    {
      "name": "geomagneticFieldH",
      "type": "double",
      "units": "nT",
      "fill": "99999.0",
      "label": "H",
      "description": "Geomagnetic horizontal intensity. Native when reported; else fill."
    },
    {
      "name": "geomagneticFieldX",
      "type": "double",
      "units": "nT",
      "fill": "99999.0",
      "label": "X",
      "description": "Geomagnetic north component. Native when reported (horizontal reported as X,Y); else fill. Not derived from H,D."
    },
    {
      "name": "geomagneticFieldY",
      "type": "double",
      "units": "nT",
      "fill": "99999.0",
      "label": "Y",
      "description": "Geomagnetic east component. Native when reported; else fill. Not derived from H,D."
    },
    {
      "name": "geomagneticFieldZ",
      "type": "double",
      "units": "nT",
      "fill": "99999.0",
      "label": "Z",
      "description": "Geomagnetic vertical (downward+) component."
    },
    {
      "name": "geomagneticFieldF",
      "type": "double",
      "units": "nT",
      "fill": "99999.0",
      "label": "F",
      "description": "Total field intensity, measured by an instrument independent of the vector components. Element letter F in the IAGA2002/WDC native output. Fill when the source reports no total field. Note that fill covers two distinct cases the source writes differently (99999 = measured but missing, 88888 = not observed at all); see x_unreportedElements for the periods in which an element was not observed."
    },
    {
      "name": "geomagneticFieldI",
      "type": "double",
      "units": "arcmin",
      "fill": "99999.0",
      "label": "I",
      "description": "Geomagnetic inclination, minutes of arc. Reserved column: native only when reported; otherwise fill.",
      "x_digits": 3
    },
    {
      "name": "versionCode",
      "type": "integer",
      "units": null,
      "fill": null,
      "label": "Version Code",
      "description": "Processing status code Mm following IAGA2002 Data Type (M: 0=variation, 1=provisional, 2=quasi-definitive, 3=definitive; m=minor, the recalculation generation within the same major: 0=first conversion, 1 and above=reconverted after the source changed)."
    }
  ],
  "x_LastUpdate": "2026-09-23T15:15:13Z"
}