Airmar LB150 - Manual (Page 7)

LB150 WeatherStation Technical Manual revision 0.013
Proprietary and Confidential
PRELIMINARY - DRAFT 4
Table 1: NMEA 0183 Regularly Transmitted Sentences
Sentence Description Enabled
by Default
Maximum
Length
(chars)
$GP DTM Datum Reference No 47
$GP GGA GPS Fix Data 82
$GP GLL Geographic Position – Latitude/Longitude No 48
$GP GSA GNSS DOP and Active Satellites No 66
$GP GSV GNSS Satellites in View No 70
$HC HDG Heading, Deviation and Variation No 33
$HC HDT Heading relative to True North 19
$WI MDA Meteorological Composite.
Barometric pressure, air temperature,
relative humidity, dew point, wind direction,
wind speed
81
$WI MWD Wind Direction and Speed, with respect to
north 1
No 41
$WI MWV
(relative)
Wind Speed and Angle, in relation to the
centerline of the front of the vehicle
(relative)
28
$WI MWV
(theoretical)
Wind Speed and Angle, in relation to the
centerline of the front of the vehicle
(theoretical) 1
No 28
$GP RMC Recommended Minimum Specific GNSS
Data
No 74
$GP VTG Course Over Ground and Ground Speed 42
$WI VWR Relative Wind Speed and Angle No 41
$WI VWT True Wind Speed and Angle No 2 41
$YX XDR
(type A)
Transducer Measurements: wind chill, heat
index, and station pressure
74
$YX XDR
(type B)
Transducer Measurements:
vehicle/instrument attitude (pitch and roll)
43
$GP ZDA Time and Date 38
1 True wind data is provided in the $WIMWD and $WIMWV (theoretical) sentences if SOG/COG,
heading, and magnetic variation data are available from the internal GPS and compass.
2 $WIVWT True Wind Speed and Angle referenced to water is provided only if water referenced speed is
available via the NMEA 0183 input from an Airmar® Smart™ speed sensor.