WindSonic Doc No 1405 PS 0019 Issue 25 February 2017
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9.4 NMEA Format (NMEA 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.
The Status codes are:
A Acceptable measurement
V Void measurement
A typical WindSonic configuration suitable for NMEA (See Section 10):
M5, U1, O1, L1, P1, B2, H1, NQ, F1, E2, T1, S4, C2, G0, K50
Consult specification NMEA 0183 version 3 (available on the web) for complete interface
details.
The WindSonic can also be set for the alternative start of string NMEA format WIMWV
(Mode 14, which is a Mnemonic for: -
Wind Instrument Mean Wind direction and Velocity.
The string format will appear as above but with WIMWV at the start of the string.
$ IIMWV, 120, R, 002.10, M, A*5D
WindSonic Doc No 1405 PS 0019 Issue 25 February 2017
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
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