Chapter 5 ________________________________________________________________ Operation
VAISALA _______________________________________________________________________ 55
Messages 5 and 6
Messages 5 and 6 are for message emulation of MITRAS
Transmissometer.
Message 7
Message 7 is for aviation-specific purposes. The message format is same
as in FD12P message 7.
Example for PWD22:
00 6839 7505 R 61 61 61 0.33 12.16 0 23.4 12345
-----
background
luminance,
cd/m²
------ Temp
----- cum. snow sum
------- cumulative water sum
------- prec. water intensity,mm/h
--- 1 hour pw code, 0... 99
--- 15 minute pw code, 0 ... 99
--- instant present weather code, 0 ... 99
---- instant present weather, NWS codes
------ visibility ten minute average, max 20000m
------ visibility one minute average, max 20000m
- 1=hardware error, 2= hardware warning,
3= backscatter alarm, 4= backscatter warning
- 1= visibility alarm 1, 2= visibility alarm 2,
3= visibility alarm 3
-RA , instant METAR weather codes
RERA , recent METAR weather (RE criteria used)
The following is an example with frames:
□PW 1□00 6839 7505 R 61 61 61 0.33 12.16 0 23.4 12345
-RA
RERA
□
S
H
PW 1
S
X
00 6839 7505 R 61 61 61 0.33 12.16 0 23.4 12345
C
R
L
F
-RA
C
R
L
F
RERA
C
R
L
F
E
X
C
R
L
F
1234567890123456789012345678901234567890123456789012345678901234567
Message 7 consists of three lines. METAR present weather codes are
output on the second and third lines. These lines are not of fixed length
because the METAR codes can be combined in many ways. The
METAR codes may be omitted, but the message lines are always
terminated by a carriage return and line feed characters.
s illustrate message 7 when using PWD22. The maximum
visibility varies according to the product
model. The messages are
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