PPRuNe Forums - View Single Post - Converting Mode C flight levels to altitudes
Thread: Converting Mode C flight levels to altitudes
View Single Post
Old 24th Jun 2009, 17:04
  #2 (permalink)  
criss
 
Join Date: Oct 2003
Location: Europe
Posts: 332
Likes: 0
Received 0 Likes on 0 Posts
You really need 3 variables - level sent by transponder, TA/TL, and current QNH. At my unit, approach controller updates the QNH in the radar system, and then computer uses it to calculate altitude for a/c below TA/TL.
criss is offline  
Reply