Teledyne RD Instruments SENTINEL V REAL-TIME, Руководство по эксплуатации

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Sentinel V SC and RT Operation Manual
September
2017
EAR-Controlled Technology Subject to Restrictions Contained on the Cover Page.
Page 253
Fixed Leader data refers to the non-dynamic Sentinel V ADCP data that only changes when you change
certain commands. Fixed Leader data also contain hardware information. The Sentinel V ADCP always
sends Fixed Leader data as output data (LSBs first).
Historically in the WorkHorse firmware, this part of the
PD0 data was called the “fixed” leader because it
stayed constant from one
PD0
ensemble to the next. For the Sentinel V, the fixed leader is not actually con-
stant from one PD0 ensemble to the next.
Table 37: Fixed Leader Data Format
Binary
Byte
Field Description
1,2
FID / Fixed
Leader ID
Stores the Fixed Leader identification word (00 00h).
3 fv / CPU F/W
Ver.
Contains the version number of the CPU firmware.
4 fr / CPU F/W
Rev.
Contains the revision number of the CPU firmware.
5,6 System
Configuration
This field defines the Sentinel V ADCP hardware configuration. Convert this field (2
bytes, LSB first) to binary and interpret as follows.
LSB
BITS 7 6 5 4 3 2 1 0
- - - - - 0 0 0 Not used
- - - - - 0 0 1 Not used
- - - - - 0 1 0 Sentinel V100 (300kHz)
- - - - - 0 1 1 Sentinel V50 (500kHz)
- - - - - 1 0 0 Sentinel V20 (1000kHz)
- - - - - 1 0 1 Not used
- - - - 0 - - - Not used
- - - - 1 - - - Not used
- - 0 0 - - - - Not used
- - 0 1 - - - - Not used
- - 1 0 - - - - Not used
- 0 - - - - - - Not used
- 1 - - - - - - Not used
0 - - - - - - - DOWN FACING BEAM
1 - - - - - - - UP-FACING BEAM
DOWN/UP FACING BEAM is dependent on the roll for the current ping.
MSB
BITS 7 6 5 4 3 2 1 0
- - - - - - 0 0 Not used
- - - - - - 0 1 Not used
- - - - - - 1 0 Not used
- - - - - - 1 1 Not used
- - - - - 1 1 1 25° BEAM ANGLE (always set)
- - - - 1 1 0 0 Not used
0 1 0 0 - - - - 4-BEAM JANUS CONFIG
0 1 0 1 - - - - 5-BEAM JANUS CONFIG
1 1 1 1 - - - - Not used
7 Real/Sim Flag This field is set by default as real data (0).
8 Lag Length Lag Length. The lag is the time period between sound pulses.
9 Number of
Beams
This field is always 4, even for 5 beam systems in case of combined mode ensem-
bles (i.e. ensembles with both vertical and slant beam data) and slant beam data
only ensembles. This is to ensure backward compatibility with legacy software.
10
Number of
Cells
Contains the number of depth cells over which the ADCP collects data.
Scaling: LSD = 1 depth cell; Range = 1 to 255 depth cells