RAN Of 2i2 
where U5 and a were computed from 
£00 00 £00 S00 
Dy 
ne ‘ab a oo XU 
if, k=l _ke wer KEI 
D = i La a Oa 
au 
S00) A y x,| ie 
k=| k=) 
£00 
= k ax =\412) x ji Me Vegeee VANS SAS: 
The mean velocity and the trend in the data were eliminated: 
Cie ij, =(y Hak 2) 
{1 
A= (Dy, eigaial) , 
The apparent autocovariance series was computed at lags equally 
spaced at intervals of AS = Ax = 19.61 cm to a maximum lag of 
mAx = SOAx = (50) (19.61 ecm) = 980.5 cm using 
a0-k 
Ralkasy = == ou laax] u'[ (ark Jor] 
ul) 
; obs. 
= eos PGR  % (22) 
=f 
15 
