directions) to represent the full 180 -deg looking window of the linear array. 

 The frequency- direction spectrum S(f„,5„) is then a matrix of 28 ( = N, the 

 number of frequencies) x 91 ( = M, the number of directions) elements. 



121. This matrix is the final discretized representation of a given 

 observed sea state. It can contain up to 2,548 (28 x 91) wave trains. Along 

 with the date, start time, gage pattern, and mean depth, this is a complete 

 set of information to characterize the desired energy distribution properties, 

 including the integrated frequency spectrum S(f„) from Equation 8 and the 

 integrated direction spectrum SC^^,) from Equation 9. 



46 



