Table 1 
Spectral Band and Peak Period Specifications 
Period 
Upper Limit Corresponding Associated with 
Band of Frequency Period, Lower Center Frequency Periods Not 
Number Band, Hz Limit of Band, sec of Band, sec Reported, sec 
6 0.064 15052 Ve 15h 
7 0.075 13.30 14 13 
8 0.086 11.64 12 
9 0.097 10.34 11 
10 0.107 9531 10 
11 0.118 8.46 9 
12 0.129 7.76 8 
13 0.140 eak© 1 
14 0.150 6.65 U 
15) 0.161 6.21 6 
16 0.172 5.82 6 
17 0.183 5.48 6 
18 0.193 6 We 5 
19 0.204 4.90 5) 
The wave periods used in this report have been rounded to the nearest second 
before summarization. Certain period values do not occur in the results, 
i.e., 13, 15, and 16 sec. During October through December 1980, a different 
analysis program was used which utilized the same FFT analysis technique but 
allowed all periods to be reported. This was accomplished by searching for 
the band (still 11/1,024 Hz wide) with the maximum energy by letting the band 
occur anywhere in frequency instead of rigidly partitioning the spectrum, 
sometimes referred to as a "floating" frequency band search. 
41, Summarizing, only a discrete set of period values is possible with 
the standard analysis. When the data are summarized into equal width period 
intervals, the results show a false absence of wave periods of 13, 15, and 
16 sec. However, some of these values were reported for data between October 
and December 1980. Complete information about the energy contained in all 
frequency bands can best be obtained by inspecting the full spectrum, examples 
of which are included in this report for all storm wave conditions during 
1982. 
23 
