Airmar LB150 - Manual (Page 28)

LB150 WeatherStation Technical Manual revision 0.013
Proprietary and Confidential
PRELIMINARY - DRAFT 25
NMEA 0183 TRANSMITTED SENTENCE
$YX
XDR
Summary
NMEA 0183 Transducer Measurements. Used in the LB150 WeatherStation to
provide wind chill, heat index, barometric station pressure, and vehicle attitude
(pitch and roll) data. For stationary instruments pitch and roll indicate the
orientation in which the instrument was mounted.
IMPORTANT NOTE: See the discussion in the Notes section below regarding
the behavior of the XDR sentence with regard to null fields and commas.
Syntax
$YXXDR,<1>, <2>, <3>, <4>,
<5>, <6>, <7>, <8>,
<9>, <10>,<11>,<12>,
<13>,<14>,<15>,<16>
*hh<CR><LF>
Fields
There are two versions of this sentence, the "A" version, and the "B" version.
The fields in the A version of the XDR sentence are as follows:
<1> C = temperature
<2> Calculated “relative” wind chill temperature, degrees Celsius, to the
nearest 0.1 degree
<3> C = degrees C
<4> WCHR (ID indicating relative wind chill)
<5> C = temperature
<6> Calculated “theoretical” wind chill temperature, degrees Celsius, to the
nearest 0.1 degree
<7> C = degrees C
<8> WCHT (ID indicating theoretical wind chill)
<9> C = temperature
<10> Calculated heat index, degrees Celsius, to the nearest 0.1 degree
<11> C = degrees C
<12> HINX (ID indicating heat index)