[{
  "dir": "Processing Direction: FWD: Forward  - BWD: Backward smoothed",
  "doy": "DAY of YEAR",
  "epoch": "Observation Date Time",
  "sat": [
    {
      "az": "Azimuth",
      "el": "Elevation",
      "prn": "Satellite PRN",
      "sig": [
        {
          "amb": "Ambiguity (for phase signal only)",
          "ar": "Ambiguity status 0:float 1:datum 2:fixed (for phase signal only)",
          "ini": "Initialisation (for phase signal only)",
          "res": "Residuals (m)",
          "samb": "Standard deviation of ambiguity (for phase signal only)",
          "type": "Signal type"
        }
      ]
    }
  ],
  "sta": "Station name"
}]