{
  "station": "Praha-Libuš",
  "nominalTimeUTC": "2025-01-01T12:00:00Z",
  "launchTimeUTC": "2025-01-01T11:15:10Z",
  "direction": "ascent",
  "retrieved": "2026-10-04",
  "sourceArchive": "https://opendata.chmi.cz/meteorology/weather/radiosounding/Praha/historical/ascent/202501_Praha_ascent_profil.zip",
  "archiveMember": "25010112_Praha_ascent_111510.csv",
  "archiveSha256": "16d729f2d3f605b3fa4e31d30ae05112fdf78f67b5ebd9dc8bf07d68b283dc8a",
  "fileSha256": "768e98bee90ac4ac304e07101014600a06808fe9d2397c96a2635872ad376621",
  "formatDocumentation": "https://opendata.chmi.cz/meteorology/weather/radiosounding/radiosondaz_popis_cz_1.0.pdf",
  "formatVersion": "1.0 (2025-04-01)",
  "dataProvenance": "Český hydrometeorologický ústav (ČHMÚ), opendata.chmi.cz",
  "licence": "CC BY 4.0",
  "licenceUrl": "https://creativecommons.org/licenses/by/4.0/",
  "reuseStatement": "https://www.chmi.cz/-/kde-najdu-otev%C5%99en%C3%A1-data-%C4%8Dhm%C3%BA-",
  "modifications": "Original CSV member reproduced byte-for-byte, including CR CR LF line endings and sep=, directive. Table and chart are our selections and visualisations of these data.",
  "columns": [
    "elapsedMinutes",
    "elapsedSecondsWithinMinute",
    "geopotentialHeightGpm",
    "pressureHpa",
    "temperatureC",
    "relativeHumidityPercent",
    "dewPointC",
    "windFromDegrees",
    "windSpeedMs",
    "latitudeDegrees",
    "longitudeDegrees"
  ],
  "recordCount": 5059,
  "selectedRows": [
    {
      "elapsedSeconds": 0,
      "heightGpm": 304.1,
      "pressureHpa": 984.28,
      "temperatureC": 7.8
    },
    {
      "elapsedSeconds": 600,
      "heightGpm": 4086.4,
      "pressureHpa": 613.84,
      "temperatureC": -10.1
    },
    {
      "elapsedSeconds": 1200,
      "heightGpm": 8224.2,
      "pressureHpa": 348.69,
      "temperatureC": -37.9
    },
    {
      "elapsedSeconds": 1800,
      "heightGpm": 12621.1,
      "pressureHpa": 173.77,
      "temperatureC": -76.2
    },
    {
      "elapsedSeconds": 2400,
      "heightGpm": 16553.7,
      "pressureHpa": 88.73,
      "temperatureC": -71.3
    },
    {
      "elapsedSeconds": 3600,
      "heightGpm": 24019.8,
      "pressureHpa": 25.02,
      "temperatureC": -72.1
    },
    {
      "elapsedSeconds": 4800,
      "heightGpm": 32174.7,
      "pressureHpa": 6.76,
      "temperatureC": -56.1
    },
    {
      "elapsedSeconds": 5254,
      "heightGpm": 34806.7,
      "pressureHpa": 4.6,
      "temperatureC": -35.5
    }
  ],
  "calculation": {
    "startElapsedSeconds": 600,
    "endElapsedSeconds": 1200,
    "temperatureDifferenceC": -27.799999999999997,
    "heightDifferenceGpm": 4137.800000000001,
    "temperatureGradientCPerGeopotentialKm": -6.718546087292761
  },
  "verificationLimit": "This public CSV already contains calibrated and processed quantities after CHMI monthly validation. It does not contain sensor electrical readings, serial number, model, calibration coefficients, processing software version or per-level measurement uncertainties. Our calculation reproduces a layer gradient from published values, not the upstream sensor processing or a climate trend."
}