Data Acquisition and Reduction Methodology

• For the phase-averaged flowfield tests, carriage speed U_c, ship model motions (x, y, z, f, q, y), PMM sway and yaw, and instantaneous flowfield velocities (U, V, W) are measured. 
• Data reduction equations for the SPIV system are taken from Willert (1997) for expression of the 3D displacement field from the two, projected, planar displacement fields. 
• Casting these equations into a final form that accounts for the stereo calibration is ongoing and will eventually enable a formal uncertainty assessment of the phase-averaged flowfield results.