Vaisala TACMET MAWS201MP, User Manual

Page: 75 / 135

Chapter 3 ________________________________________________________________ Operation
VAISALA _______________________________________________________________________ 73
To be able to notice a problem situation in the system, it is important
to understand which fields are automatic and which are manual. Table
28 below lists automatic and manual fields and the special conditions
related to them.
Table 28 Data Fields in METAR/SPECI Template
Parameter Automatic/
Manual Comment
WIND, 1st field Automatic Wind direction in degrees.
WIND, 2nd field Automatic Wind speed in m/s or knots.
GUST Automatic Maximum wind speed during the last 10 minutes.
VRB, 1st field Automatic Lower limit of wind direction variation in degrees
during the last 10 minutes
VRB, 2nd field Automatic Upper limit of wind direction variation in degrees
during the last 10 minutes
VIS, value Automatic Visibility, 10-minute average from the selected site
VIS,
direction code Manual Direction of visibility (N, NE, E, SE, S, SW, W, NW,
or /)
VIS 2,
value Manual Visibility, 10-minute average from the selected site
VIS 2, direction code Manual Direction of visibility (N, NE, E, SE, S, SW, W, NW,
or /)
RVR fields Manual Runway Visual Range: minimum, average,
maximum, tendency.
RVR 2 fields Manual Runway Visual Range: minimum, average,
maximum, tendency.
PRESENT WEATHER,
1st field Automatic Automatic value from PWD11A.
PRESENT WEATHER,
2nd field Manual Second present weather code
PRESENT WEATHER,
3rd field Manual Third present weather code
CLOUDS , 1
st
row, 1
st
field
SKC and VV
automatic, other
values manual. Cloud amount (VV, SKC, FEW, SCT, BKN, OVC).
CLOUDS, 1
st
row, 2
nd
field
Automatic Cloud height in meters, feet, or hundreds of feet.
CLOUDS, 1
st
row, 3
rd
field
Manual Cloud type (CB, TCU)
CLOUDS, all other rows Manual Like the fields in the first row of the Clouds group,
except the cloud amount options are: FEW, SCT,
BKN, OVC. The 1
st
row is for the lowest cloud layer,
the last row for the highest layer.
T Automatic Temperature in Celsius degrees.
DP Automatic Dew point in Celsius degrees.
QNH Automatic Pressure reduced to the mean sea level in
hectopascals or inHg.
REWX Manual Recent weather code.
WIND SHEAR Manual Wind shear alerting system is not a standard part of
the system, so this is a manual field.
TREND Automatic The field is a special data field.
REMARK Manual The field is for additional information.
CODE Automatic Shows the data to be sent