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Troubleshooting WeatherView (page 40)
4.2.4 Weather Data Fields
Depending on the workstation type and installation, typically when the LLWAS system is
integrated with an AWOS system, the WeatherView application can include other data, in
addition to the LLWAS data presented above. Some typical optional features are presented
below.
Depending on the workstation type and installation, the WeatherView application can also
include data fields for other weather parameters, for example, visibility, cloud, or pressure
data. The location and amount of the data fields depend on the system configuration.
Figure 4 WeatherView: Data Field Example
The data on WeatherView screens come from the sensors that are located along the runway,
and it is updated automatically several times a minute. Some of the values are instant, which
means that they come from a sensor without delay. Some are average values, which means
that the system first collects data (typically for a 2- or 10
‑
minute period) and then calculates
the average value from that data.
The data is processed data, not raw sensor data. This means that when values come from
sensors to the CDU, the system checks that values fall within the specified range for that
sensor. Values are also rounded and displayed according to ICAO specifications and
recommended practices (SARP) and converted to appropriate measurement units.
4.2.4.1 Data Status Indication
The color of the data values indicates the data status. Depending on the configuration, the
data status indication may be disabled (for each user/user group) or different colors may be
used. For an explanation on the standard colors used, see the following table.
Table 8 WeatherView: Data Field Status Colors
Data Color
(Day) Data Color
(Night) Status Description
Black White Normal The data is OK.
Red Modified red Invalid The data is not valid, or it is out of the preset
validation limits.
Brownish yellow Modified
brownish yellow
Old The latest expected data update(s) have not arrived,
but data is still valid for use.
Chapter 4 – WeatherView
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