Vaisala WMT700 - Manual (Page 160)

User's Guide ______________________________________________________________________
WS425 A/B NMEA Extended Data
Message
WS425 A/B NMEA Extended data message is as follows:
$PMWV,
where
$P
= Fixed text
= Data ID; A … Z
MWV = Fixed text
= Wind angle: 0 to 359 degrees
= Reference:
R = relative
= Wind speed
= Wind speed unit:
K = Kilometers per hour
M = Meters per second
N = Knots
= Status:
A = Valid data
V = Invalid data
* = Fixed text
= Checksum (8-bit XOR, excluding $ and *)
= Carriage return code, ASCII 0DH
= Line feed code, ASCII 0AH
Missing Readings
If data is missing due to a measurement problem, the NMEA
messages show "V" in the status field. Wind speed and wind
direction fields are left empty.
158 __________________________________________________________________ M211095EN-E