80 
90 100 No 
FROM 2258 TO 2323 E.S.T. 
OFF LONG BRANCH, NJ. 
: rn ENS re 
22 re) 0 
=a 
ee 
8 
— 1,0 
° 10 20 30 40 50 60 70 
NON- NORMALIZED AUTO-CORRELATION FUNCTION 
REDUCED TO UNIT AMPLITUDE BY DIVISION BY Ep max 
FOR PRESSURE RECORD OF /0-18-2I 
Al A (DEPTH OF 32.5 FEET MS:b 
i Ane, 
5 
210 
= 
25 26 NA 
fe) i) 2 3 4 -) 6 7 8 9 10 Ww 12 3 14 15 16 17 1@ 19 20 21 22 23 24 
am) 7 T T T Tv T Ww T WT =: WT 7 WT Tr Tr us us Tr T Tr Tr Tr 7 T T us 
20° 60 30 20 15 i2 10 6675 67 6 55 5 4643 4 38 35 3332 3 29 27 26252423 
ad @ i120 60 40 30 24 20 I7) 15 13.3 12 109 10 92 866 8 75 71 67 63 6 57 55 5.2 5 48 46 T seconos 
BEST ESTIMATE OF THE PRESSURE POWER SPECTRUM 
OF ABOVE AUTO-CORRELATION FUNCTION IN TERMS OF 
FRACTION OF TOTAL POWER PER UNIT BAND OF THE 
yw AXIS. SUM OF VALUES AT: w= 222, h-0,1,2,...30 IS EQUAL TO 1.018 
Lp 
220 
a5 
20 
205 
° 
h oO ' 2 3 4 5 6 7 8 9 1o Wt 2 #1 4 18 16 17 #18 t9 20 2) 22 23 24 25 26 27 28 29 30h 
"RAW" OR UNFILTERED POWER SPECTRUM OF ABOVE 
Fig 38 The Analysis of a Pressure Record 
—s87— 
120 
30 
140 150 
LAG IN SECONDS 
160 
