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WorkHorse H-ADCP Operation Manual
May
2015
EAR-Controlled Technology Subject to Restrictions Contained on the Cover Page.
Page 229
Table 47:
DVL Output Data Format (PD4/PD5) Details
Hex Digit
Binary Byte Field
Description
11-14
15-18
19-22
23-26
6,7
8,9
10,11
12,13
X-Vel Btm
Y-Vel Btm
Z-Vel Btm
E-Vel Btm
These fields contain the velocity of the vessel in relation to the bottom in mm/s. Positive
values indicate vessel motion to east (X), north (Y), and up (Z). LSD = 1 mm/s (see NOTES at
end of this table).
27-30
31-34
35-38
39-42
14,15
16,17
18,19
20,21
Bm1
Bm2 Rng to
Bm3 Bottom
Bm4
These fields contain the vertical range from the H-ADCP to the bottom as determined by
each beam. This vertical range does not compensate for the effects of pitch and roll. When
a bottom detection is bad, the field is set to zero.
Scaling: LSD = 1 centimeter; Range = 0 to 65535 cm
43,44
22
Bottom Status
This field shows the status of bottom-referenced correlation and echo amplitude data.
Convert to binary and interpret as follows. A zero code indicates status is OK.
BIT 76543210
1xxxxxxx BEAM 4 LOW ECHO AMPLITUDE
x1xxxxxx BEAM 4 LOW CORRELATION
xx1xxxxx BEAM 3 LOW ECHO AMPLITUDE
xxx1xxxx BEAM 3 LOW CORRELATION
xxxx1xxx BEAM 2 LOW ECHO AMPLITUDE
xxxxx1xx BEAM 2 LOW CORRELATION
xxxxxx1x BEAM 1 LOW ECHO AMPLITUDE
xxxxxxx1 BEAM 1 LOW CORRELATION
45-48
49-52
53-56
57-60
23,24
25,26
27,28
29,30
Velocity 1
Velocity 2
Velocity 3
Velocity 4
These fields contain the velocity of the vessel in relation to the water-mass reference layer
in mm/s. The setting of the
(Coordinate Transformation) determines how the
H-ADCP references the
EX-CMD
COORD SYS
Velocity 1
Velocity 2
Velocity 3
Velocity 4
xxx00xxx
Beam
To Beam 1
To Beam 2
To Beam 3
To Beam 4
xxx01xxx
Instrument
Bm1-Bm2
Bm4-Bm3
To Xducer
Err Vel
xxx10xxx
Ship
Port-Stbd
Aft-Fwd
To Surface
Err Vel
xxx11xxx
Earth
To East
To North
To Surface
Err Vel
Positive values indicate water movement (see notes at end of this table).
61-64
65-68
31,32
33,34
Ref Layer Start
Ref Layer End
These fields contain the starting boundary (near surface) and the ending boundary (near
bottom) of the water-mass reference layer (BL-command). If the minimum size field is
zero, the H-ADCP does not calculate reference-layer data.
Scaling: LSD = 1 dm; Range = 0-9999 dm
69,70
35
Ref Layer Status
This field shows the status of reference layer depth and correlation data. Convert to binary
and interpret as follows. A zero code indicates status is OK.
BIT 76543210
xxx1xxxx ALTITUDE IS TOO SHALLOW
xxxx1xxx BEAM 4 LOW CORRELATION
xxxxx1xx BEAM 3 LOW CORRELATION
xxxxxx1x BEAM 2 LOW CORRELATION
xxxxxxx1 BEAM 1 LOW CORRELATION
71,72
73,74
75,76
77,78
36
37
38
39
TOFP Hour
TOFP Minute
TOFP Second
TOFP Hundredth
These fields contain the time of the first ping of the current ensemble.