- XIV - 



LIST OF SYMBOLS (Continued) 



Ptf sensor back-fill pressure 



Pdyn dynamic pressure 



Pmean mean pressure of record 



Px pressirre differential in x direction 



Py pressure differential in y direction 



Q difference in water column height above sensors; 

 volumetric flow rate in sensor line 



q' normalized quad-spectra 



R rated capacity of transducer 



s sensor height above bottom 



S(^) imidirectional spectral density 



S(^ ,9) directional energy spectrum 



S*{6 ,9) measured directional energy spectrum 



t time 



U current 



X X-axis location 



y y-axis location 



Zg water column height above sensor ' 



0^ instrument tilt; transducer diaphragm volumetric 



change proportionality constant to pressure differential 



/b angle between gauges 



/3n' apparent heading of DPG airm n 



pn actual heading of DPG axm n 



APf frictional pressure drop along circular pipe 



At data sampling interval 



aVq volume displaced by transducer diaphragm 



AX gage length 



6 phase angle 



€^ error in compass measurement of DPG arm n 



1^ water surface displacement 



'^ X water surface slope in x direction 



