This is an old revision of the document!
The transitionLevel.xml file is used to calculate the transition level (TRL) and the transition altitude (TA) for each airport.
The transition level.xml
file is located in the fir/
directory
Root Element | trl | |
---|---|---|
Element | airport | |
Attribute | Format | Remarks |
icao | string | airport icao code, selects every airport starting with this (partial) ICAO code |
default | boolean | the default transition level to use |
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> <!-- TA=6000 --> <airport icao="EKCH" default="true"> <qnh ta="6000" trl="55" min="1032" max="1060"/> <qnh ta="6000" trl="60" min="1014" max="1031"/> <qnh ta="6000" trl="65" min="996" max="1013"/> <qnh ta="6000" trl="70" min="978" max="995"/> </airport> <airport icao="EKRK"> <qnh ta="6000" trl="55" min="1032" max="1060"/> <qnh ta="6000" trl="60" min="1014" max="1031"/> <qnh ta="6000" trl="65" min="996" max="1013"/> <qnh ta="6000" trl="70" min="978" max="995"/> </airport> <!-- TA=3000 --> <airport icao="EKYT"> <qnh ta="4000" trl="35" min="1032" max="1060"/> <qnh ta="4000" trl="40" min="1014" max="1031"/> <qnh ta="4000" trl="45" min="996" max="1013"/> <qnh ta="4000" trl="50" min="978" max="995"/> </airport> </trl>