TM No. 377 



Z Line of axes separation 



I lu Velocity vector in X direction 



M Total number of units on frequency scale (maximum lag) 



N Number of turns in coil (chapter 2) 



N Number of interpolated data points 



Pr^or P(f| ) Gaussian time probability distribution 



Q, Dimensionless constant 



Quw(^) Qua-spectrum of the functions u(t) and w(t) 



R Radius 



R^ Coherence (dimensionless quantity) 



Rg Ratio of flow velocity to towing speed 



R(0) Off -angle response in horizontal plane 



R(0) Off -angle response in vertical plane 



Rg Ratio of virtual velocity to true velocity 



r Radius of the impeller (chapter 2) 



r Linear correlation coefficient 



r(h) Linear correlation coefficient between fluctuations at 

 points separated by a distance h 



T Duration of record 



T Period of rotation (chapter 2) 



T 1 ,T 2 ---T n Time intervals 



T^ Time constant in air 



Tl Period of swing (wave meter considered as a pendulum) 



T Q Period of forced oscillation 



Tp or T^ Response time 



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