INVERSE TRANSFORM NOISE 



-1500 



10' 1 



to 100 



Q 10-1 



S 10-' 



I 10-N 



o 



UJ 



?5 10-5 



10- 



10- 



8 10 12 14 16 18 



DISTANCE (KILOMETERS) 



10-' 10° 10' 



FREQUENCY (CYQES/KILOMETER) 



102 



Figure B-4 An example of random "white noise" generated using an 

 Inverse Fast Fourier Transform. The method of calculation 

 forces a perfectly constant amplitude spectrum. This "white 

 noise" generator was used for performance testing of the 

 province picker algorithm. 



142 



