-300 



200 



10= 



> 10- 



^ 103 ■ 



U lO-* ■ 



>- 

 u 



10' 



o 



I 



^ 10' ■ 



56 112 169 225 281 337 393 449 506 562 618 674 



CUMULATIVE DATA POINTS DOWNTRACK 



10-2-1 



10-3 10-2 10' 10° 



NORAAALIZED FREQUENCY (CYCLES/DATA INTERVAL) 



10' 



Figure 4-3 Illustration of a typical amplitude spectrum of sea floor 

 topography. A profile of the data, collected by SASS on 

 the Gorda Rise, is presented above. The spectrum shows 

 clearly the power law form as a linear fit on log-log plot. 

 Possible extrapolations of the trend are shown as dashed 

 lines beyond the fundamental and Nyquist frequencies. 



23 



