Appendix A ________________________________________________________________ Glossary
VAISALA______________________________________________________________________ 131
Graphical
Windshear Display
Typically part of the Weather View application. Indicates the windshear
alerts in graphical format on the airport image.
invalid data status A data status displayed in the weather data fields in the Weather View
application. The background color of the field is red. This status
indicates that the data is not valid due to sensor or system problems. See
also data status.
IO Terminal A system maintenance application for connecting to field devices and
sending commands to them.
LAN Local Area Network. The AviMet system computers are connected via
LAN. In duplicated systems, the two CDUs communicate via LAN.
LLWAS algorithm The algorithm used in the AviMet LLWAS system for calculating the
windshear conditions. The LLWAS phase III windshear algorithm
developed by NCAR for the U.S. Federal Aviation Administration
(FAA).
LLWAS processing
status
The status text displayed in the LLWAS screen in the Weather View
application. Indicates the status of sensor network. See degraded
LLWAS processing status, normal LLWAS processing status, and
support LLWAS processing status.
LLWAS screen A screen in the Weather View application displaying wind data,
windshear alert data, and microburst alert data in text format for the
specified runways.
maintenance
applications
See system maintenance applications.
maintenance mode See command mode.
manual data status A data status shown in the Weather View application with a yellow
background color in data fields for other than LLWAS wind data.
Indicates that the data is not coming from a sensor, but is updated
manually by the user. See also data status.
measured data Weather parameters that the sensors measure directly, in contrast to
calculated data. Measured data can be used as the basis of producing
calculated data.
measurement site See site.
Message
Notification
An event type in the Diagnostics application (when the LLWAS system
is integrated with AviMet AWOS).
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