Manual

June 2004 Isis® Sonar User's Manual, Volume 2
43
S
Seconds. This can be a decimal number to include a fraction of a
second.
T
Velocity East
Note: If speed (V) is not specified, and velocity North
and East
are specified, then speed is computed from the
velocity north and east.
U
Velocity North. Fish Speed = sqrt(T*T+U*U) * 1.9438445
Note: If speed (V) is not specified, and velocity North
and East
are specified, then speed is computed from the
velocity north and east.
V
Fish Speed (knots) — main speed used for image correction
W
Fish Depth in feet (if no manual depth is set)
Y
Year
Z
Benthos flag is set TRUE. Characters 121 132 (inclusive, zero-
based indexing) in the receive string are stored as downlink and
saturation information. The characters are then blanked-out to
prevent parsing errors.
a
Auxiliary Altitude (meters)
b
Temperature Frequency (CTD data)
e
Magnetometer X
g
Channel 1 Gain Code (0 255)
h
Fish Heading (degrees)
i
Current Line ID
j
Channel 2 Gain Code (0 255)
k
Channel 3 Gain Code (0 255)
l
[small letter “ell”] Layback (in meters)
m
Fish Speed. (m/s) (This value is multiplied by 1.9438445 to
become knots.)
n
Channel 4 Gain Code (0 255)
o
[small letter “oh”] Cable Out (in meters)
q
Channel 1 Initial Gain Code (0 255)
r
Channel 2 Initial Gain Code (0 255)
s
Speed log (knots) from impeller or other such sensor; stored only
t
Channel 3 Initial Gain Code (0 255)
u
Channel 4 Initial Gain Code (0 255)
v
Ship Speed (in knots; stored only)
w
Magnetometer Y
x
Shi
p
Lon
g
itude
(
decimal de
g
rees
)
or eastin
g
(
meters
)
; stored
Appendix D: Serial Interfaces