with the eigenvalues 



(7) 



The vertical dependency of the observed fluctuations in the ocean are then 

 described by 



ivfe;=y A^w„ (2) 



(8) 



The phase velocity of these waves, c^ is given by 



'n\l- — - ) 



(9) 



if f«ci> , equation 9 reduces to 



(10) 



Therefore, the phase velocity can be computed simply by measuring the mean 

 density piz) and computing the eigenvalues e^ from (6). Viz) is generally 

 computed from the formula 



rfej=— ajz + ^z) -ajz) (11) 



l+10~'^af ^z 



Analysis of Data from Anchor Stations 



Knowledge of the internal wave structure of an area is best obtained at 

 anchor stations, where doppler shifting will not affect the frequencies and 

 where observations can extend to the bottom. The thermistor chain is ideally 

 suited for observations from an anchored ship in shallow water because its 

 temperature sensors are equally spaced. Equal spacing of transducers is 

 essential because description of observations by internal waves requires 



