angle approximation trapezoidal projections of the 
etector arrays can be accurately approximated by 
grams, with the center, located at the intersection of 
ezoids diagonals. Extraction of the parallelogram 
fr the TM scene can then be done rather efficiently. 
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parallelo 
the trap 
subimage 
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The pixel values for equally spaced nodes of the parallelogram 
grid can be computed by the bi-linear interpolation of the four 
adjacent pixel values of the TM image. The time-sequence 
extracted in such a way is presented on Figure 5. 
  
etector #6. 
  
      
    
      
    
    
   
     
   
  
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B. PP tS Cmm. MMe