43
Cell Position
Distance from sensor to centre
of the cell[m]
dd.dd
Velocity East
[m/s]
dd.ddd
Velocity North
[m/s]
dd.ddd
Velocity Up
[m/s]
dd.ddd
Amplitude Beam 1
[dB]
ddd.d
Amplitude Beam 2
[dB]
ddd.d
Amplitude Beam 3
[dB]
ddd.d
Amplitude Beam 4
[dB]
ddd.d
Correlation Beam 1
[%]
dd
Correlation Beam 2
[%]
dd
Correlation Beam 3
[%]
dd
Correlation Beam 4
[%]
dd
Example (DF101, 4 beams)
$PNORC1,083013,132455,3,11.0,0.332,0.332,0.332,0.332,78,78.9,78.9,78.9,78,76,72,76*46
7.1.8 $PNORBT4
– Speed over ground and depth
Field
Description
DataFormat
DT1
Time from trigger to bottom
echo (NOT USED)
d.ddd
DT2
NOT USED
d.ddd
Speed Over Ground
[m/s]
d.ddd
Direction
[degrees true North]]
d.d
Figure Of Merit
#
dd.ddddd
Distance to Bottom
[m]
dd.d
Example:
$PNORBT4,0,0,1.234,23.4,12.34567,12.3*09
7.1.9 $VDVDR
– Current Speed and Direction
The VDR sentence contains the corrected current speed and direction. These are the same values as shown as current
sticks in the Track plot, i.e. averaged over time and profile.
Field
Description
DataFormat
Direction
[degrees true North]
ddd.d
“T”
Marker for True North
T
Direction Magnetic
<empty>
“M”
Marker for Magnetic heading
M
Speed
Current Speed in knots
dd.dd
“N”
Marker for Knots
N
