Vaisala WINDCAP WS425 User's Guide Page 160

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User's Guide ______________________________________________________________________
WS425 A/B NMEA Extended Data
Message
WS425 A/B NMEA Extended data message is as follows:
$P<id>MWV,<dir>,<ref>,<spd>,<uni>,<sta>*<chk><CR><LF>
where
$P
=
Fixed text
<id>
=
Data ID; A … Z
MWV
=
Fixed text
<dir>
=
Wind angle: 0 to 359 degrees
<ref>
=
Reference:
R = relative
<spd>
=
Wind speed
<uni>
=
Wind speed unit:
K = K
ilometers per hour
M = M
eters per second
N = Knots
<sta>
=
Status:
A = V
alid data
V = Invalid data
*
=
Fixed text
<chk>
=
Checksum (8-bit XOR, excluding $ and *)
<CR>
=
Carriage return code, ASCII 0DH
<LF>
=
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
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