-1000 



% 



a 



^ m-'^-^ 



i."'-^" 



^ 2.0- 



£1.0-1 



0.0 - 



-0—0 5 — ■" ° 



U-20 



"1 — I — I — i — I 1 — I 1 — I — I 1 — I — I 1 — I 1 r 



20 la 60 80 100 120 140 160 180 



AZIMUTH (degrees) 



Figure E-3 Artificially generated surface composed of two orthogonal 

 trends with identical intercepts of a= 1.0, but spectral 

 slopes of b= -1.5 in the N-S direction and b= -1.0 in the 

 E-W direction. Azimuthally dependent spectral parameters 

 are plotted below. 



208 



