September
2017
Sentinel V SC and RT Operation Manual
Page 238
EAR-Controlled Technology Subject to Restrictions Contained on the Cover Page.
Expert Water Profiling Commands
#WA – False Target Threshold
Purpose
Sets a false target (fish) filter.
Format
#WAnnn,x
Range
nnn = 0 to 255 counts (255 disables this filter)
x = Start bin 0 - 256
Default
#WA050,1
Recommended Setting. The default setting for this command is recommended for most applications.
Description The Sentinel V Real-Time ADCP uses the #WA-command to screen water-track data for
false targets (usually fish). #WA sets the maximum difference between echo intensity read-
ings among the four profiling beams. If the #WA threshold value is exceeded, the ADCP
rejects velocity data on a cell-by-cell basis for either the affected beam (fish detected in only
one beam) or for the affected cell in all four beams (fish detected in more than one beam).
This usually occurs when fish pass through one or more beams.
A #WA value of 255 turns off this feature.
#WE - Error Velocity Threshold
Purpose
Sets the maximum error velocity for good water-current data.
Format
WEnnnn
Range
nnnn = 0 to 9999 mm/s
Default
#WE2000
Recommended Setting. The default setting is set purposely high. We recommend extreme caution and
testing before changing this setting.
Data rejected by this command is lost and cannot be regained.
Description The #WE-command sets a threshold value used to flag water-current data as good or bad.
If the Sentinel V Real-Time ADCP’s error velocity value exceeds this threshold, it flags data
as bad for a given depth cell. The #WE command screens for error velocities in both beam
and transformed-coordinate data. Setting the #WE command to zero (#WE0) disables er-
ror velocity screening.
