05 
  
  
+ 
60 %. 
+275 
, indicated in % of flying height, caused by the 
+ infra filter at forward overlap of 
lens distortion of the unit Aviogon camera 
-— 
oO. 
! ! 
a 
^ 
WA 
BM 
  
  
  
Fig. 6. The height correction 
16