I«'j) 



I(fn.^m) 



I^'^'Cfn.^j) 



k 



k 



K 



K 



K 



K 



L 



Lp,IFS 



g Gravitational acceleration 



G(s) Coefficient in an analytic model of directional 

 distribution which has s as a parameter 



Hn,o A characteristic wave height 



1 y^ , indicates complex notation 



Cumulative distribution function of integrated direction 

 spectrum at direction 8^ 



Cumulative distribution function at frequency f„ and 

 direction $^ 



Cumulative distribution function for mode k at direction 

 6^ from a directional distribution at frequency f„ 



Wave number vector; components (k^.ky) 



Magnitude of wave number vector; 

 counting index of modes in a distribution 



Magnitude of wave number corresponding to n'^*' frequency 



Cross shore component of wave number 



Longshore component of wave number 



Number of modes in a directional distribution 



Wavelength 



Wavelength associated with the peak frequency of the 

 integrated frequency spectrum 



Ly Longshore wavelength 



m Index associated with discrete direction 



M Integer number of discrete directions 



n Index associated with discrete frequency 



N Integer number of discrete frequencies 



pU) Fraction of total energy at frequency f^ contained in 

 mode k of a directional distribution 



Quad Quadrature or out-of-phase part of product of Fourier 

 coefficients of two signals 



r Index of a discrete direction bounding a mode on the left 

 (counter-clockwise) side 



B2 



