\ ,.. 



\\ IrA \ 95% CONFIDENCE | 

 '■|y \ \ LIMITS f 



v^ 





5 JULY 1961 

 1745-1830 i 

 1830-1915 H 



V-A^ 



100 



-«_ PERIOD 

 50 40 30 



(SEC) 



20 15 1 



-<— PERIOD (SEC) 

 100 50 40 30 20 15 



.04 .05 .06 .07 .08 .09 

 CPS^*- 



.04 .05 .06 .07 .08 .09 

 CPS— *- 



1000 



100 



3AL )' 

 PS 



10 

 1.0 



1 1 1 1 1 1 1 





95% 



CONFIDENCE i 

 LIMITS 





6 JULY 1961 

 _ 0345-0430 Z 

 .... 0430-0515 Z 



-(—PERIOD (SEC) 

 100 50 40 30 20 



■=, , . ■! 





.01 .02 .03 .04 .05 .06 



.07 .08 .09 .1 



( MGAL ) 

 CPS 





^ 



...•yV 



^\ 95% 



CONFIDENCE I 

 LIMITS \ 





Iv-.-- 



r 1 



''^•^ 



'X^/V 







6 JULY 1961 

 0845-0930 Z 

 0930-1015 Z 





^ s 





100 



-♦—PERIOD (SEC) 

 50 40 30 20 



15 



1 



.04 .05 

 CPS— *- 



.06 .07 .08 .09 



6 JULY 1961 

 _ 1350-1435 Z 

 .... 1435-1520 Z 



95% CONFIDENCE 

 LIMITS 



100 50 40 30 



-PERIOD (SEC) 



.04„.05 .06 .07 



FIGURE 6 Power spectra of 5 water wove records token during 5 and 6 July 1961 — Spectra are computed separately for each 

 half of the 90-minute records. Spectra are not corrected for instrument response. 



19 



