Manual

June 2004 Isis® Sonar User's Manual, Volume 2
45
followed by a file name to be used for the file name switch.
{lom}
Serial template to parse fish longitude stored with separate
degrees and minutes. Example: S 44 38.231 W 121 17.455. The
template to parse this is {lam}N{lom}E, where E is the token for
the fish position.
{lp}
Power-bottle leak detector
{ms}
Ship speed in m/s. Converted to knots by multiplying by
1.9438445.
{m}
Conductivity in MMHO/cm. Converted to Siemens/meter by
dividing by 10.0.
{pattern=
input_string}
Isis finds any pattern of characters in
input_string. Processing
of the string proceeds from that point forward. Pattern matching
is case-sensitive. If a match is not found, processing stops. Any
processing that happened before the {pattern=
input_string}
token was encountered, still occurs. To specify a '}' character as
part of a pattern string, put a '\' character in front of it. For
example, {pattern=\}} will cause Isis to look for a closed-brace
character. To specify a '\' character as part of a pattern string,
use two backslashes (\\). See
‘Examples of Pattern Matching’.
{pf}
Pressure Frequency (CTD data)
{p}
{p} is pressure in psia. Fish depth is then computed from
pressure according to a standard UNESCO formula as
follows:
Z
s
(P,φ) = 9.72659x10sP – 2.512x10-1P2 + 2.279x10-4P3 –
1.82x10-7P4
[g(φ) + 1.092x10-4P]
Where g(φ), the international formula for gravity, is given by:
g(φ) = 9.780318 (1 + 5.2788 x 10
-3
sin
2
φ + 2.36 x 10
-5
sin
4
φ)
Z = depth in meters
P = pressure in MPa
φ = latitude
The above equation is true for oceanographers’ standard ocean,
defined as an ideal medium with a temperature of 0 C and
salinit
y
of 35
p
arts
p
er thousand. Other methods for calculatin
g
Appendix D: Serial Interfaces