MELLEN: SOUND PROPAGATION IN A RANDOM MEDIUM 



'5,- 



— MARCH & SEPTEMBER 



— APRIL 



— JUNE 



— JULY 



I 5 10 



FKEOUENCV (Cycl«S/h) 



SO 100 



Figure 16. SPECTRUM OF TIME FLUCTUAT'IONS 



100- 

 90- 



z 



UJ 



o 70- 

 £ 



i 50- 



5 40- 



O 30- 



S 20- 

 o 



e 



o 10- 



\ ^ 



.\ 



\ 



\ 



\ 



2000 

 1000 ' 



600 



— ARRIVAL TIMES 



--RELATIVE AMPLITUDES 

 o ARRIVAL TIMES (FILTERED) 

 . ARRIVAL TIMES (NOT FILTEREDI 

 AMPLITUDES (NOT FILTEREDI 



\ 



\ 



X 100' 



1 1 1 1 1 1 '" «-! 1 ' — B ' 1 



100 200 ^ 3D0 



VERTICAL SENSOR SEWRATION IN FEET 



Fiaure 17. SPATIAL COHERENCE AT BERMUDA 



408 



