Wu - Ping Weight; Wv - Ambiguity Velocity; Table 29: Ping Weights - Teledyne WORKHORSE Operation Manual

WorkHorse H-ADCP Operation Manual

WU - Ping Weight

Purpose: Selects the weight of each ping in an ensemble.
Format WUn
n = 0 (Box weighting), 1 (Triangle weighting)
Range
Default WU0
Recommended Setting. The default setting for this command is recommended for most applications.
Description The WU command allows the user to choose the ensemble weighting method. WU0 se-
lects Box weighting which is a simple average of the velocities in each ensemble. WU1 se-
lects Triangle weighting, where the first and last velocities are weighted the least, and the
middle velocity is weighted the most.
Example For an ensemble of 5 pings, the weights would appear as below.
Table 29: Ping Weights
Ping 1
WU0 1
WU1 1/3
The velocity reported for each ensemble is calculated as the sum of the weighted velocities
divided by the sum of the weights.
The WL command
(WU1).
WV – Ambiguity Velocity
Purpose Sets the radial ambiguity velocity.
Format WVnnn
nnn = 2 to 700 cm/s
Range
Default WV185
Recommended Setting. It is strongly recommended that the WV command be left at its' default value
of 185.
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 H-ADCP speed.
The WV command (ambiguity velocity setting) sets the maximum velocity that can be
measured along the beam when operating in water mode 1 (default mode). 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 (ADCP motion plus water
speed). The following formula is used to determine the setting of the WV command: WV
= (Max. Apparent Vel. cm/s) * sin(beam angle) * 1.5
Ping 2 Ping 3
1 1
2/3 1
(Water reference layer) must be turned on when triangle weighting is used
EAR-Controlled Technology Subject to Restrictions Contained on the Cover Page.
Ping 4 Ping 5
1 1
2/3 1/3
May 2015
Page 179