L 
ae 
35 
Tt 
Ty 
Ra(k AS ) 
on S 
Vaio) 
Ry(k O§ ) 
TR No. 22 
maximum lag at which a value of the autocovariance 
series is computed (cm) 
length of sample (cm) 
Nyquist wave number (cm=1} 
time from start of run to beginning of ith rotation of 
impeller (sec) 
period of rotation of the impeller (sec) 
period of ith rotation of impeller (sec) 
apparent autocovariance function (cm@=sec™*) 
hanning lag function (non-dimensional) 
hanning spectral function; the Fourier transform of 
fy( & ) (cm) 
=) 
aes ; : 2 = 
modified apparent autocovariance function (cm“=sec 
aliased, modified, one-dimensional energy spectrums the 
Fourier transform of the autocovariance series 
ee ASS) (om3-sec™-) 
velocity of water flowing through current meter 
(cm=sec=1} 
angular velocity of impeller (rad-sec71) 
diameter of impeller (cm) 
advance diameter ratio; J = u/(@) D) (non-dimensional) 
moment of inertia of impeller (gram-cm®) 
calibration coefficient of the current meter (cm) 
resultant driving torque on impeller (dyne=cm) 
angle between axis of current meter and the direction of 
towing (degrees) 
