x,y,z Right-handed rectangular coordinate system, z pointing 



downward 



a Angle between the ship's direction and the direction of wave 



travel 



Viz) \_ jll 



p dz 



8 Delta function 



e Eigenvalue 



^ w/oj = amplitude of the displacement 



Potential temperature 



K,r] Wave number in x, y direction 



A Wavelength 



fjL Weighting factor in the eigenfunction expansion for 



unequally spaced data 



^ A transformation (see equation 76) 



p Density 



p(z) Mean density distribution 



(Tj p [(S,T,p = 0)] • 10^ 



T Period 



r' Doppler-shifted period 



T A transformation (see equation 79) 



9S Phase of a wave, gravitational potential or geographical 



latitude 



t/f A wave function of ix,y,z,t) 



o 



if/ Space-dependent part of the wave function 



277 



^ ~J'= angular frequency 



