!
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)
presented in units of m2/Hz for ADV and I2/Hz for
CIIS
Normalized mean spectral density as a function of
S(f)n
I2/Hz for CIIS. Normalized by maximum S(f)
Wave direction vector scatter index
SIθ
t
Time
Tp
Peak wave period
Ts
Significant wave period, sec
u
Horizontal image coordinate
v
Vertical image coordinate
VITC
Vertical Interval Time Code
x
Distance offshore; X-coordinate of imaged object in 3-
D coordinate system
xc
X-coordinate of camera location in 3-D coordinate
system
(xp,yp), (xq,yq)
Pixel sensor pair locations in 3-D coordinate system
A2
Appendix A Notation
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