X-axis, real-world 3-D coordinate system (cross-

shore)

ADV observation for statistical analysis

Y-coordinate of imaged object in 3-D coordinate

system

yc

Y-coordinate of camera location in 3-D coordinate

system

Y-axis, real-world 3-D coordinate system (alongshore)

CIIS observation for statistical analysis

Z-coordinate of imaged object in 3-D coordinate

system

Z-coordinate of camera location in 3-D coordinate

zc

system

Z-axis, real-world 3-D coordinate system

α

Phillips constant

αpq

Wave number coefficient

γ

Enhancement factor

η

Water-surface elevation

θm

Vector-mean wave direction

θm(*f*)

Vector-mean wave direction as function of frequency

presented in units of deg relative to model coordinate

system

θm(*f*)c

Vector-mean wave direction as a function of

frequency presented in units of deg relative to model

coordinate system following application of coherence

cutoff criteria

<∆θ>

Wave direction mean angular difference

σ

Camera roll rotation angle

σα

Low-frequency peak decay factor

σb

High-frequency peak decay factor

σθ

Standard deviation of wave direction mean angular

difference

τ

Camera tilt rotation angle

φ

Camera pan rotation angle

A3

Appendix A Notation

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