September
2017
Sentinel V SC and RT Operation Manual
Page 244
EAR-Controlled Technology Subject to Restrictions Contained on the Cover Page.
#ZS – Vertical Beam Bin Size
Purpose:
Sets the vertical length of the bin, which indirectly sets the volume.
Format:
#ZSnnn
Range:
nnn = see Table 35, -1 = same as WS command
Default:
#ZS-1
Recommended Setting. The default setting for this command is recommended for most applications.
Software warning: Changing this command may cause problems with TRDI display and processing
software.
Description: The Sentinel V Real-Time collects data over a number of bins. #ZS sets the size of each bin
in vertical centimeters.
Table 35.
Vertical Beam Cell Size
System
Cell Size (Default
)
Minimum Cell size
Maximum Cell Size
Sentinel V 100m (307.2kHz)
-1 (same as WS command)
100 cm
600 cm
Sentinel V 50m (491.52kHz)
-1 (same as WS command)
60 cm
480 cm
Sentinel V 20m (983.04kHz)
-1 (same as WS command)
30 cm
240 cm
#ZV – Vertical Beam Ambiguity Velocity
Purpose:
Sets the vertical beam radial ambiguity velocity.
Format:
#ZVnnn
Range:
nnn = 2 to 700 cm/s, -1 = same as WC command/cos(angle)
Default:
#ZV -1
Recommended Setting. The default setting for this command is recommended for most applications.
Software warning:
Changing this command may cause problems with TRDI display and processing
software.
Description: Set #ZV as low as possible to attain maximum performance, but not too low or ambiguity
errors will occur. Rule of thumb: Set #ZV to the maximum relative horizontal velocity be-
tween water-current speed and Sentinel V Real-Time speed.
The #ZV command (ambiguity velocity setting) sets the maximum velocity that can be
measured along the beam when operating in water mode 2 (#ZM2). #ZV is used to improve
the single-ping standard deviation. The lower the value of the #ZV command, the lower the
single-ping standard deviation.
Set the #ZV command based on the maximum apparent velocity (Sentinel V Real-Time
motion plus water speed). The following formula is used to determine the setting of the
#ZV command: #ZV = (Max. Apparent Vel. cm/s) * sin(beam angle) * 1.5, where 1.5 is a
safety factor.
