WindSonic Doc No 1405 PS 0019 Issue 28 November 2019
33
9.5 NMEA Format (Gill status Codes)
The
Wind Direction, Wind Speed,
and
Units
are as described in Section 9.1.
The
Instrument Type
– IIMWV - is a mnemonic for Integrated Instrument Mean Wind
direction & Velocity (alternative start of string format WIMWV can be selected).
The
Gill
Status
codes are as described in Para 11.5.
A typical WindSonic configuration suitable for NMEA (See Section 10):
M16, U1, O1, L1, P1, B3, H1, NQ, F1, E2, T1, S4, C2, G0, K50
Consult specification NMEA 0183 version 3 (available on the web) for complete interface
details.
9.6 Gill format
– Tunnel Mode (UU, Continuous)
In this mode, the output is given as a signed figure (i.e. positive or negative) along the
‘U’ (= South – North) axis.
Direction is indicated by a 0 or 1.
Where:
<STX>
=
Start of string character (ASCII value 2)
WindSonic node address
=
Unit identifier
U axis
=
U axis Wind Speed
U axis
U axis Wind Direction Polarity where: -
0 (–U vector) is a wind from the North direction or
1 (+U vector) is a wind from the South direction.
See Section 9.1 for other string information.
$ IIMWV, 120, R, 002.10, M, 00*5D
Wind direction
Wind speed
Units
Status
Start of
string
Instrument
type
Relative wind measurement
Check sum
STX> Q, 001.59, 1, 00, M, <ETX> 2D
WindSonic
node
address
U axis
speed
U axis
polarity
Status
Units
Check
sum
