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  2. Altimeter setting - Wikipedia

    en.wikipedia.org/wiki/Altimeter_setting

    The QNH altimeter setting is one of the data included in METAR messages. An alternative setting is QFE or SPS/STD: An alternative setting is QFE or SPS/STD: QNH - is the barometric altimeter setting that causes an altimeter to read aircraft elevation above mean sea level - altitude ( AMSL - above mean sea level) in ISA temperature conditions in ...

  3. Pressure altitude - Wikipedia

    en.wikipedia.org/wiki/Pressure_altitude

    QNE is an aeronautical code Q code.The term refers to the indicated altitude at the landing runway threshold when or is set in the altimeter's Kollsman window. It is the pressure altitude at the landing runway threshold.

  4. Density altitude - Wikipedia

    en.wikipedia.org/wiki/Density_altitude

    Density Altitude Computation Chart [1]. The density altitude is the altitude relative to standard atmospheric conditions at which the air density would be equal to the indicated air density at the place of observation.

  5. Altimeter - Wikipedia

    en.wikipedia.org/wiki/Altimeter

    Digital barometric pressure sensor for altitude measurement in consumer electronic applications Altitude can be determined based on the measurement of atmospheric pressure.

  6. Flight level - Wikipedia

    en.wikipedia.org/wiki/Flight_level

    However, in some countries, such as Norway for example, [9] the transition level is determined by adding a buffer of minimum 1,000 ft (300 m) (depending on QNH) to the transition altitude. Therefore, aircraft may be flying at both transition level and transition altitude, and still be vertically separated by at least 1,000 ft (300 m).

  7. Aeronautical Code signals - Wikipedia

    en.wikipedia.org/wiki/Aeronautical_Code_signals

    QFE: The pressure set on the subscale of the altimeter so that the instrument indicates its height above the reference elevation being used [e.g. aerodrome elevation] [1] Runway in use 22 Left, QFE 990 hectopascals QFF: Atmospheric pressure at a place, reduced to MSL using the actual temperature at the time of observation as the mean ...