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Length

Number of array elements

NA

Not applicable

Autospectra of pixel sensor pair at [*x*p, *y*p]

Autospectra of pixel sensor pair at [*x*q, *y*q]

PUV

Pressure and horizontal velocity components

Quad-spectrum of pixel sensor pair location in 3-D

coordinate system [*x*p, *y*p] and [*x*q, *y*q]

u-vector component of wave direction correlation

coefficient

v-vector component of wave direction correlation

coefficient

Wave direction vector correlation coefficient

u-vector component of wave direction root-mean-

square error

v-vector component of wave direction root-mean-

square error

Wave direction root-mean-square error

Mean spectral density as a function of frequency

presented in units of m2/Hz for ADV and *I*2/Hz for

CIIS

Normalized mean spectral density as a function of

Wave direction vector scatter index

Time

Peak wave period

Significant wave period, sec

Horizontal image coordinate

Vertical image coordinate

VITC

Vertical Interval Time Code

Distance offshore; X-coordinate of imaged object in 3-

D coordinate system

xc

X-coordinate of camera location in 3-D coordinate

system

Pixel sensor pair locations in 3-D coordinate system

A2

Appendix A Notation

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