April 2018 Pathfinder DVL Guide
Page 210
EAR-Controlled Technology Subject to Restrictions Contained on the Cover Page.
Table 48: Pathfinder Output Data Format (PD4/PD5) Details
Hex Digit Binary
Byte
Field Description
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 EX-command (Coordi-
nate Transformation) determines how the Pathfinder references the
velocity data.
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 ta-
ble).
61-64
65-68
31,32
33,34
Ref Layer Start
Ref Layer End
These fields contain the starting boundary (near surface) and the end-
ing boundary (near bottom) of the water-mass layer (BL-command). If
the minimum size field is zero, the Pathfinder does not calculate water
mass data.
Scaling: LSD = 1 dm; Range = 0-9999 dm
69,70 35 Ref Layer Status This field shows the status of water mass 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 Hun-
dredth
These fields contain the time of the first ping of the current ensemble.
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