Sentinel V SC and RT Operation Manual
September
2017
EAR-Controlled Technology Subject to Restrictions Contained on the Cover Page.
Page 243
#ZM – Vertical Beam Profile Mode
Purpose:
Selects the vertical beam profiling mode used by the Sentinel V Real-Time.
Format:
#ZMn
Range:
n = 2, -1 = same as WM command (see description)
Default:
#ZM-1
Recommended Setting. The default setting for this command is recommended for most applications.
Description: The #ZM command sets an application-dependent profiling mode. The chosen mode se-
lects the types of pings transmitted. The ping type depends on how much the water-current
is changing from ping-to-ping and from cell-to-cell.
#ZM2 refers to water mode 2 (WM2) pings for the vertical beam profile ping. WM2 pings
are very similar to TRDI’s traditional WM1 pings, except that they use 8-bit sampling in-
stead of 1-bit sampling. These pings use a relatively short lag (i.e. large ambiguity velocity),
and make the assumption that the velocities being measured will never rise above the am-
biguity velocity; i.e. there is no ambiguity resolving being done.
#ZN – Vertical Beam Number of Bins
Purpose:
Sets the number of vertical beam profile bins (depth cells) over which the Sentinel V Real-
Time collects data.
Format:
#ZNnnn
Range:
nnn = 1 to 200 bins, -1 = same as WN command
Default:
#ZN-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 range of the Sentinel V Real-Time vertical beam is set by the number of bins (#ZN)
times the size of each bin (#ZS). The backscatter level is also a factor in determining the
range that can be effectively measured by the vertical beam.
