{
  "HAPI": "2.0",
  "resourceURL": "https://cdaweb.gsfc.nasa.gov/misc/NotesI.html#IMAP_SWAPI_L3A_ALPHA-SW",
  "contact": "Prof. David J. McComas @ Princeton University",
  "parameters": [
    {
      "name": "Time",
      "length": 30,
      "units": "UTC",
      "type": "isotime",
      "fill": null
    },
    {
      "name": "alpha_sw_speed",
      "description": "Magnitude of the bulk velocity vector of the solar wind alpha-particle population (spacecraft frame)",
      "units": "km/s",
      "type": "double",
      "fill": "-1.0E31"
    },
    {
      "name": "alpha_sw_speed_sun",
      "description": "Magnitude of the bulk velocity vector of the solar wind alpha-particle population (Sun frame)",
      "units": "km/s",
      "type": "double",
      "fill": "-1.0E31"
    },
    {
      "name": "alpha_sw_density",
      "description": "Number density of the solar wind alpha-particle population",
      "units": "cm^-3",
      "type": "double",
      "fill": "-1.0E31"
    },
    {
      "name": "alpha_sw_temperature",
      "description": "Scalar temperature of the solar wind alpha-particle population",
      "units": "K",
      "type": "double",
      "fill": "-1.0E31"
    },
    {
      "size": [
        3
      ],
      "name": "alpha_sw_velocity_rtn_sun",
      "description": "Solar wind alpha-particle bulk velocity vector in RTN coordinates (Sun frame)",
      "units": "km/s",
      "type": "double",
      "fill": "-1.0E31"
    },
    {
      "size": [
        3
      ],
      "name": "alpha_sw_velocity_rtn",
      "description": "Solar wind alpha-particle bulk velocity vector in RTN coordinates (spacecraft frame)",
      "units": "km/s",
      "type": "double",
      "fill": "-1.0E31"
    },
    {
      "name": "swp_flags",
      "description": "Quality flags for SWAPI L3a (caution required if nonzero)",
      "units": "0: okay; nonzero: caution",
      "type": "integer",
      "fill": "65535"
    }
  ],
  "startDate": "2025-11-08T16:44:03Z",
  "stopDate": "2026-04-30T23:59:25Z",
  "status": {
    "code": 1200,
    "message": "OK"
  },
  "x_LastUpdate": "2026-08-03T15:10:29Z"
}