Gill Instruments Ltd
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MaxiMet
Page 51
Issue 1
Doc. No. 1957-PS-000x
March 2015
GMX600
GMX600 NMEA data strings comprise of: -
$WIMWV,049,R,000.03,N,A*03<CR><LF>. Where:-
$WIMWV
Wind Instrument Mean Wind direction and Velocity.
049
Wind Direction.
R
Relative Wind measurement, wind speed and/or direction information,
reported with respect to the MaxiMet North marker.
000.03
Wind Speed.
N
Knots (NMEA output fixed to Knots measurement only).
A
Acceptable measurement (V is a void fail measurement).
O3
Hex Check Sum.
Immediately followed by:-
$WIMWV,049,T,,N,A*18<CR><LF>.
$WIMWV
Wind Instrument Mean Wind direction and Velocity.
049
Wind Direction.
T
T
rue Wind measurement, wind speed and/or direction information,
corrected by a compass and GPS (option) to give accurate data
regardless of where north marker is aligned.
,,
Wind Speed only available if a GPS option is fitted.
N
Knots (NMEA output fixed to Knots measurement only).
A
Acceptable measurement (V is a void fail measurement).
OC
Hex Check Sum.
Immediately followed by:-
$WIXDR,
C,+023.9,C,TEMP
,P,1.0243,B,PRESS,
H,039,P,RH
,
Y,000.0,M,PRECIP
*
01
<CR><LF>.
Where: -
$WIXDR
Wind Instrument Cross track error Dead Reckoning
C
Type of Sensor (Temperature)
+023.9
Temperature Reading
C
Temperature Reading in Degrees Centigrade
TEMP
Name of Temperature Sensor
P
Type of Sensor (Pressure)
1.0243
Pressure Reading in Bars.
B
Pressure Units of Measure (Bars)
PRESS
Name of Pressure Sensor
H
Type of Sensor (Humidity)
039
Humidity Reading in Percent
P
Humidity Units of Measure (Percent)
RH
Name of Relative Humidity Sensor
Y
Type of Sensor (Precipitation)
000.0
Millimetres per hour of Precipitation
M
Precipitation Units of Measure (Millimetres)
PRECIP
Name of Precipitation Sensor
*01
Hex CheckSum
<CR> is a Carriage return character (ASCII hex value d)
<LF> is a Line Feed Character (ASCII hex value a)
Checksum, the 2 digit Hex Checksum sum figure is calculated from the Exclusive OR of
the bytes between (and not including) the $ and * characters.
