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Length
N
Number of array elements
NA
Not applicable
Ppp
Autospectra of pixel sensor pair at [xp, yp]
pqq
Autospectra of pixel sensor pair at [xq, yq]
PUV
Pressure and horizontal velocity components
Qpq
Quad-spectrum of pixel sensor pair location in 3-D
coordinate system [xp, yp] and [xq, yq]
RU
u-vector component of wave direction correlation
coefficient
v-vector component of wave direction correlation
RV
coefficient
Wave direction vector correlation coefficient
Rθ
u-vector component of wave direction root-mean-
RMSEU
square error
v-vector component of wave direction root-mean-
RMSEV
square error
Wave direction root-mean-square error
RMSEθ
S(f)