October 2017 RiverPro and RioPro ADCP Guide
Page 128
EAR-Controlled Technology Subject to Restrictions Contained on the Cover Page.
WV – Ambiguity Velocity
Purpose Sets the radial ambiguity velocity.
Format WVnnnn
Range nnnn = 5 to 999 cm/s
Default WV0250
Recommended Setting. Set using the WinRiver II wizard.
Description Set WV as low as possible to attain maximum performance, but not too low or ambiguity
errors will occur. Rule of thumb: Set WV to the maximum relative horizontal velocity be-
tween water-current speed and RiverPro/RioPro speed.
The WV command (ambiguity velocity setting) sets the maximum velocity that can be
measured along the beam when operating in water mode 1 (WM1). WV is used to improve
the single-ping standard deviation. The lower the value of the WV command, the lower
the single-ping standard deviation.
Set the WV command based on the maximum apparent velocity (RiverPro/RioPro motion
plus water speed). The following formula is used to determine the setting of the WV com-
mand: WV = (Max. Apparent Vel. cm/s) * sin(beam angle) * 1.5, where 1.5 is a safety fac-
tor.
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