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The transitionLevel.xml file is used to calculate the transition level (TRL) and the transition altitude (TA) for each airport.
Root Element | trl | |
---|---|---|
Element | airport | |
Attribute | Format | Remarks |
icao | string | airport icao code |
selects every airport starting with this (partial) ICAO code |
The icao attribute can be a full 4 character ICAO airport designator or a partial code which will select multiple airports.
Element | qnh | |
---|---|---|
Attribute | Format | Remarks |
ta | integer | Transition Altitude (TA) |
trl | integer | Transition Level (TRL) in hundreds of feet |
min | float | minimum QNH value |
max | float | maximum QNH value |
The TRL (transition level) is choosen using the current QNH and comparing it with the minimum and maximum QNH values.
<trl> <airport icao="eb"> <qnh ta="4500" trl="45" min="1031.3" max="1049.3" /> <qnh ta="4500" trl="50" min="1013.2" max="1031.2" /> <qnh ta="4500" trl="55" min="995.1" max="1013.1" /> <qnh ta="4500" trl="60" min="977.0" max="995.0" /> <qnh ta="4500" trl="65" min="958.9" max="976.9" /> </airport> </trl>