Gill Instruments WindObserver II, User Manual

Page: 20 / 33

Gill Instruments Ltd
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WindObserver II (WindObserver FC)
Page 20 Issue 2
Doc. No. 1390-PS-0011 June 2007
7.8. 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 Valid measurement
V Invalid measurement
Check sum Exclusive OR of all characters between ‘$’ and ‘*’
reported as ASCII hex.
The default WindObserver II (WindObserver FC) configuration suitable for NMEA is:
B3, 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.