<< DEPTH, FT. 
30 
SiS) 
A ROTATED POLYNOMIAL FIT 
@ HARMONIC FIT 
O ORIGINAL DATA 
100.5 
OSES 
110.5] 
Ii S.8 
13 14 i) 
Tg AIFS RANT 0) 
‘a 
Figure 12. Fit of temperature data along strut 
signals in the record are not, in general, the frequencies of the 
internal waves in the earth's reference system; they are what 
naval architects call "frequency of encounter". There is a Doppler 
shift, depending on the relative bearing of the propagation vector. 
In fact, at certain narrow intervals of bearing, there is not even a 
one-to-one correspondence between the two kinds of frequencies 
throughout the spectrum. 
