TR No. 22 
for k = 0, 1, 2, 3, e+, 50. The apparent autocovariance series was 
modified according to hannings 
5 (I+cos i ) : kK 250 
Ru lkos)< Ralkos) 
0, otherwise 
(23) 
The Fourier transform of the modified autocovariance series was 
computed at values of wave number K equally spaced at intervals of 
ZK = 17/50Dx = 0.00320 em? from 
24>, (Gok) =2@, & 
BL>X 
61 D kar 
lad 1 B[2) Balk os) Cos +@,,(0) +2, (PFE) es am | - 
ata i 
51 feo 
IL) paeierul< ; 
Values of the computed energy spectrum were obtained for wave 
numbers up to the Nyquist wave number ent = Ooalay/ emt, the values are 
referred to positive wave numbers only. The values of the computed 
energy spectrum function were divided by the sample variance: 
/ Fa, (Fok) 
Gea (72k) = ; 
Km CO) 
(24) 
Location of Samples 
From the original data and the computer printout of the digitized 
velocity data, the following were determined: 
(S = time from the start of the run to the instant the boat 
passed between the channel buoys (sec); 
16 
