4 
II. Data processing 
The Aandcraa RCM aw data arc converted to physical data using individual calibration: 
data for each current meter. The BSH calibrates its current meters regularly performing tests for 
rotor speed and compass deviation. 
Current statistics are calculated from data smoothed over 48 hours with a Gaussian low- 
pass lllter to remove tidal currents. The mean values of the zonal (a) and meridional (v) 
components of current vector V are given together with the 95% confidence interval assuming a 
Gaussian normal distribution: 
’iiiue ± 1.96 v . 1 r , n - number of cycles 
yn -l 
The Lagrangjan statistics were calculated according to Taylor (1921 ) 4 . 
Symbols and abbreviations used in the tables: 
dir 
mean current direction 
dir( u,v }= atan2( u,v jLt 
180 
n 
mean kinetic energy 
eddy kinetic energy 
eddy diffusivjty 
mag 
RCM 
magnitude of current vector V 
recording current meter 
Taylor, Q.I., 1921: Diffusion by continuous movements. 
Proc, London Math. Soc., A20, 196-211.