{
  "HAPI": "3.1",
  "status": {
    "code": 1200,
    "message": "OK request successful"
  },
  "parameters": [
    {
      "length": 24,
      "name": "Time",
      "type": "isotime",
      "units": "UTC"
    },
    {
      "name": "Field_Vector",
      "type": "double",
      "units": "nT",
      "size": [
        3
      ],
      "desc": "N_geo, E_geo, Z_geo aka the N, E, A vector components in geographic mapping"
    },
    {
      "name": "mlt",
      "type": "double",
      "units": [
        "hours",
        "degrees"
      ],
      "fill": [
        "0",
        "0"
      ],
      "size": [
        2
      ],
      "desc": "The Magnetic local time and colatitude, mlt, mcolat, in hours, degrees"
    },
    {
      "name": "sza",
      "type": "double",
      "units": "degrees",
      "fill": "0",
      "desc": "The solar zenith angle, in degrees"
    },
    {
      "name": "decl",
      "type": "double",
      "units": "degrees",
      "fill": "0",
      "desc": "The Declination from IGRF Model, in degrees"
    },
    {
      "name": "N_geo",
      "type": "double",
      "units": "nT",
      "fill": "0",
      "desc": "N_geo, the N vector component in geographic mapping."
    },
    {
      "name": "E_geo",
      "type": "double",
      "units": "nT",
      "fill": "0",
      "desc": "E_geo, the E vector component in geographic mapping."
    },
    {
      "name": "Z_geo",
      "type": "double",
      "units": "nT",
      "fill": "0",
      "desc": "Z_geo, the A vector component in geographic mapping."
    }
  ],
  "startDate": "2000-01-01T00:00Z",
  "stopDate": "2002-01-01T00:00Z",
  "sampleStartDate": "2000-12-01T00:00Z",
  "sampleStopDate": "2000-12-02T00:00Z",
  "maxRequestDuration": "P1Y",
  "cadence": "PT1M",
  "citation": "https://supermag.jhuapl.edu/info/?page=rulesoftheroad",
  "description": "The SuperMAG data processing technique, J. W. Gjerloev, https://doi.org/10.1029/2012JA017683\n\n    Baseline Determination\nSuperMAG HAPI provides three options for the user:\n\n1. Subtract the daily variations and yearly trend (using Gjerloev, 2012)\n2. Subtract only the yearly trend (using Gjerloev, 2012)\n3. Do not subtract any baseline\n\nSuperMAG thus provides 3 different solutions. The user should use the appropriate dataset for the study. As an example a study of the Sq current or the equatorial electrojet should not subtract the daily variations since this will remove part of this signal.For more details, see https://supermag.jhuapl.edu/mag/?fidelity=low&tab=description",
  "additionalMetadata": [
    {
      "name": "iaga",
      "content": "LEK"
    },
    {
      "name": "x_latitude",
      "content": "68.13"
    },
    {
      "name": "x_longitude",
      "content": "13.54"
    },
    {
      "name": "baselines",
      "contentURL": "https://supermag.jhuapl.edu/mag/?fidelity=low&tab=description",
      "content": "Subtract only the yearly trend (using Gjerloev, 2012)"
    }
  ],
  "x_LastUpdate": "2025-08-10T15:10:23Z"
}