What is qfe

In aviation, the station pressure is reduced independently of the current weather conditions at sea-level. The vertical distribution is uniform according to the ICAO standard atmosphere and the resulting atmospheric pressure value adjusted to sea-level is called the QNH.

The atmospheric pressure is measured using a digital pressure measuring device produced by Vaisala. The devices stand out thanks to their high level of stability and precision.

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Hazards This content is currently available only in German, French and Italian. Hazards Recommendations for action Explanation of the danger levels Natural hazard bulletin Kantone. Current weather The map shows the current weather and temperature. If you know the height of the airfield above sea-level, you can calculate the QNH. Here on the ground , the altimeter was set to QFE reading 0 feet.

This was the pressure for that day. QNE is different to the other altimetry Q codes in that it is an altitude not a pressure although it is commonly incorrectly described as such. With Standard Pressure Pressure to height conversions in altimetry are based on ISA. In non-ISA conditions, altimeter readout may be significantly different than the true altitude of said altimeter.

Since cold air is denser than warm air, isobaric surfaces are vertically more constrained towards the ground. It is for flight in colder-than-ISA that particular attention must be paid to true altitude. Paste as plain text instead. Only 75 emoji are allowed. Display as a link instead. Clear editor. Upload or insert images from URL. Share More sharing options Followers 1. Reply to this topic Start new topic.

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