{
  "_id": "4.2.4.2",
  "name": "Code table 4.2 - Parameter number by product discipline and parameter category # Product discipline 4 - Space weather products, parameter category 2: charged particle mass and number",
  "values": [
    {
      "codeentry": "Particle number density",
      "codefigure": "0",
      "flag_value": "",
      "note": "",
      "status": "Operational",
      "unit": "m-3"
    },
    {
      "codeentry": "Electron density",
      "codefigure": "1",
      "flag_value": "",
      "note": "",
      "status": "Operational",
      "unit": "m-3"
    },
    {
      "codeentry": "Proton density",
      "codefigure": "2",
      "flag_value": "",
      "note": "",
      "status": "Operational",
      "unit": "m-3"
    },
    {
      "codeentry": "Ion density",
      "codefigure": "3",
      "flag_value": "",
      "note": "",
      "status": "Operational",
      "unit": "m-3"
    },
    {
      "codeentry": "Vertical total electron content",
      "codefigure": "4",
      "flag_value": "",
      "note": "",
      "status": "Operational",
      "unit": "TECU"
    },
    {
      "codeentry": "HF absorption frequency",
      "codefigure": "5",
      "flag_value": "",
      "note": "",
      "status": "Operational",
      "unit": "Hz"
    },
    {
      "codeentry": "HF absorption",
      "codefigure": "6",
      "flag_value": "",
      "note": "",
      "status": "Operational",
      "unit": "dB"
    },
    {
      "codeentry": "Spread F",
      "codefigure": "7",
      "flag_value": "",
      "note": "",
      "status": "Operational",
      "unit": "m"
    },
    {
      "codeentry": "h'F",
      "codefigure": "8",
      "flag_value": "",
      "note": "",
      "status": "Operational",
      "unit": "m"
    },
    {
      "codeentry": "Critical frequency",
      "codefigure": "9",
      "flag_value": "",
      "note": "",
      "status": "Operational",
      "unit": "Hz"
    },
    {
      "codeentry": "Maximal usable frequency (MUF)",
      "codefigure": "10",
      "flag_value": "",
      "note": "",
      "status": "Operational",
      "unit": "Hz"
    },
    {
      "codeentry": "Peak height (hm)",
      "codefigure": "11",
      "flag_value": "",
      "note": "",
      "status": "Operational",
      "unit": "m"
    },
    {
      "codeentry": "Peak density (Nm)",
      "codefigure": "12",
      "flag_value": "",
      "note": "",
      "status": "Operational",
      "unit": "m-3"
    },
    {
      "codeentry": "Equivalent slab thickness (tau)",
      "codefigure": "13",
      "flag_value": "",
      "note": "",
      "status": "Operational",
      "unit": "km"
    },
    {
      "codeentry": "Reserved",
      "codefigure": "14-191",
      "flag_value": "",
      "note": "",
      "status": "Operational",
      "unit": ""
    },
    {
      "codeentry": "Reserved for local use",
      "codefigure": "192-254",
      "flag_value": "",
      "note": "",
      "status": "Operational",
      "unit": ""
    },
    {
      "codeentry": "Missing",
      "codefigure": "255",
      "flag_value": "",
      "note": "",
      "status": "Operational",
      "unit": ""
    }
  ]
}