10-"^ 



10- 



S 



^ 10*- 



10-7- 



10-8- 



10- 



T 1 — I I M I 11 



10" 



1 — I — I I I 1 1 ll 



10' 10" 10* 



SPATIAL FREQUENCY (CYQES/KILOMETER) 



T 1 — I I I I I l| 



10' 



T — 1 — r I I I 1 11 



10' 



Figure 5-5 Amplitude spectrum derived from profile A illustrated in 

 Figure 5-3. Regression lines represent model spectra from 

 profiles A, B.C. and D. Differences between these spectra 

 are within estimation error, indicating no significant 

 variation in time for the microtopography at this location 

 nor significant anisotropy within each sample. 



59 



