Specifications

AIRMAR
®
PB100 WeatherStation Technical Manual revision 1.007
22
Default State
Disabled. Transmitted once per second when enabled.
Notes
The $WIXDR sentence is provided for backward compatibility. It is
recommended to use the newer $YXXDR(A) and $YXXDR(B) sentences,
instead, which provide more information.
The fields in the $WIXDR sentence are grouped in sets of four. There may be up
to four sets, with four fields per set, in a single transmitted $WIXDR sentence.
Each set contains, in order, the four fields <Type>, <Data>, <Units>, and <ID>.
If for some reason the contents of a given set are not available, then the entire set
(including commas) may be omitted. It is necessary when parsing any XDR
sentence to examine the <ID> field in each set of four fields in order to identify
the meaning of the data in that set.
The $WIXDR sentence may be enabled via the $PAMTC,EN,XDR command.
The wind chill temperature is the perceived temperature on a person’s face at the
current wind speed. The calculation assumes that the wind speed measured by the
sensor is the same as the wind speed at the face of an observer. The “relative”
wind chill uses the measured apparent wind speed for this calculation, and the
“theoretical” wind chill uses the calculated true wind speed.
The reported pitch and roll values are adjusted by the azimuth, pitch, and roll
offsets established with the $PAMTC,ATTOFF command.
At this writing, the pitch and roll features are only provided in PB100 units with
hardware version 3. Model LB100 does not provide pitch and roll. The
$PAMTC,QV query can be used to determine the hardware version for a given
unit.
See also the $YXXDR(A) and $YXXDR(B) sentences, on the next page.