TWO-DIMENSIONAL AMPLITUDE SPECTRUM 



2^122 



-2^122 



-3^157 .2.3438 -1.1719 0.0000 1.1719 



FREQUENCY (CYQES/KILOMETER) 



2.3438 



3.5157 



Figure 6-13 Two-dimensional amplitude spectrum from the Gorda Rise area 

 Illustrated in Figure 6-5. Log-transformed amplitude esti- 

 mates, computed via a two-dimensional Fourier transform, 

 are represented by light contours drawn every 0.5 order of 

 magnitude. The heayy lines represent amplitude estimates 

 predicted by the four- parameter, azimuthally dependent 

 model derived for the area. 



104 



