Gill Instruments Ltd
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WindObserver II Pipe Mount
Page 27
Issue 04
Doc. No. 1390-PS-0009
August 2009
8.10. NMEA Format
Instrument
Identifier
Wind direction
Wind speed
Units
Checksum
delimiter
$ IIMWV, 120, R, 002.10, M, A* CC
Start of string
Instrument
type
Wind
measurement
Status
Check
sum
where
Wind direction
In degrees relative to N (DDD)
Wind speed
In increments of 0.01 units (
MMM.MM)
Units
M
Metres per second (m/s)
N
Knots (knots)
P
Miles per hour (MPH)
K
Kilometres per hour (kph)
F
Feet per minute (fpm)
Start of string
$
Instrument type
IIMWV
Wind measurement
R
Relative wind measurement
Status
A
A
cceptable measurement
V
V
oid measurement
Check sum
Exclusive OR of all characters between ‘$’ and ‘*’
reported as ASCII hex.
A typical WindObserver II (Pipe Mount) configuration suitable for NMEA would be:
B2, E1, F1, G0, K1, L1, M5, O1, P1, U1.
Consult specification NMEA 0183 version 3 (available on the web)
www.nmea.org
for
complete interface details.
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