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FIGS 6-10: EXPERIENCE WITH HYBRID IR-VISIBLE VIEWING FROM LOW FLYING AIRCRAFT | FI 
   
  
  
  
  
  
  
   
   
  
  
  
  
  
  
  
  
  
   
  
  
  
  
  
  
   
  
  
  
  
  
  
  
   
  
  
  
  
  
  
  
   
  
  
  
FIG 6. 
The preflight checkout procedure | 
for the airborne instrument assembly | 
involves both coincidence and virtual 
image plane adjustment, to correspond 
with a convenient object chosen at 
the distance to be flown from the 
patrol objects. White = warm in the 
hybrid view shown here. 
hybrid view with black = warm. Since 
'black' becomes transparent in the 
Superviewer, this is an excellent 
mode for airborne alignment should 
this be necessary, since objects 
are seen through their transparent 
image positions only when properly 
aligned. 
FIG 8. 
With isothermal contours replacing 
the gray tones in the hybrid view, 
remote temperature measurements 
can be made in realtime, while air- 
borne, or offline from the VTR play- 
back, after landing. 
FIG 9. 
The observer, sitting up front beside 
the pilot, uses the CCTV monitor to 
follow what the IR operator is seeing. 
The monitor's light shade and separate 
brightness and contrast controls enable 
the black-and-white TV imagery to be 
seen even in the highest ambient light. 
FIG 7. 
Continuing the preflight checkout: 
FIG 10. 
A portable video tape cassette recorder 
(VTR) is used to register the hybrid view 
of airborne detection events, together 
with simultaneous sound recordings from 
the aircraft intercom system, relating 
the circumstances of each event.