Airmar LB150 - Manual (Page 38)

LB150 WeatherStation Technical Manual revision 0.013
Proprietary and Confidential
PRELIMINARY - DRAFT 35
_ NMEA 0183 RECEIVED SENTENCE _
$PAMTC,
ALT
Summary
Settings related to the altitude of the LB150.
Syntax
One of the following forms:
$PAMTC,ALT,SET,<2>,<3>,<4>*hh
$PAMTC,ALT,Q*hh
Fields
<2> Fixed altitude, -999.9 meters to +40,000.0 meters, to the nearest 0.1
meter.
Default value = 0 meters
<3> 0 = Do not use fixed altitude for GPS 2D mode
1 = Use fixed altitude for GPS 2D mode
Default value = 0
<4> 0 = Do not use altitude for barometric pressure altimeter setting
($WIMDA, fields 1 and 3)
1 = Barometric pressure altimeter setting uses fixed altitude (field
<2>).
2 = Barometric pressure altimeter setting uses GPS altitude when
GPS has a 3D fix, or fixed altitude (field <2>) when GPS does
not have a 3D fix.
Default value = 2.
Notes
The $PAMTC,ALT,SET,<2>,<3>,<4> command is used to program the LB150
WeatherStation with a fixed altitude setting to be used in calculating a more
accurate GPS position when the GPS is operating in 2D mode, and in calculating