SPECTRAL ESTIAAATES FROM SEVERAL SOURCES 



10° I 



10-' '■, 

 a 10-2 . 



I— 

 Ul 



O 10-3 , 



uj 10-^ 1 



a 



< 10-4 



a 



Ul 

 M 



r: 10-7 J 



glO-3, 



z 



10-9 



10-10 



DEEP-TOW 



PHOTO 



10- 



I I Mi ll r 



10-2 



I iiiii| I I I iiMii I I I mill 

 10-' 10° 10 



I I I IIIMI 



10 = 



10' 



I I IIMII 



10" 



III III' IMI| 



10* 10* 



SPATIAL FREQUENCY (CYQES/KILOMETER) 



Figure 7-2 Composite amplitude spectrum of bathymetric profiles derived 

 at various scales by different survey Instruments. All data 

 were collected on the East Coast continental rise near 

 ^O'ZTH, ez'aO'W, proximal to the HEBBLE area. Regression 

 lines represent the mean bottom roughness model derived from 

 fourteen SASS profiles Illustrated In Figure 5-13. Model 

 predicts the deep-tow derived spectrum almost exactly over 

 ~1.5 decades of spatial frequency. The spectrum derived 

 from a stereo-pair bottom photograph Is predicted to within 

 0.5 orders of magnitude over ~5 decades of spatial frequency 

 (200 meters to 2 millimeters wavelength). 



115 



