are basically a direction finder technique, a least square single-wave 

 train fit, and a Fourier-Bessel expansion fit. In conclusion, a 

 generalized Fourier expansion method is suggested. Extensive results 

 of the application of the least square single -wave train fit are pre- 

 sented in Appendix A. Appendix B is a FORTRAN II listing of a program 

 for this analysis. 



WAVE MODELS 



In its simplest form an ocean wave can be thought of as a single 

 frequency, sinusoidal, infinitely long crested wave of length A, moving 

 in time over the ocean surface from a given direction 6 . Such a wave 

 is illustrated in Figure 1. 



Spatial Frequency 

 Along V axis is zero 



Tl(u,v,to) 



y 



Spatial Frequency Along 

 y axis is m = K sin 6 



Direction of 9 Wave 

 •^Travel in Time t 



u Spatial Frequency 

 along u axis K = l/X 



Spatial Frequency 

 along X axis is 

 X = K cos 



FIGURE 1. SIMPLE OCEAN WAVE 



