Maintenance Manual________________________________________________________________
132 _________________________________________________________________ M210886EN-G
microburst
A small, very intense downdraft that descends to the ground, resulting in
a strong wind divergence. The size of the event is typically less than 4
kilometers across. Microbursts are capable of producing winds of more
than 100 mph, causing significant damage. The life span of a microburst
is around 5-15 minutes. See also
microburst alert
and
microburst
conditions
.
microburst alert
An alert generated in the
Weather View
application when the calculated
microburst conditions exist. See also
microburst
and
microburst
conditions
.
microburst
conditions
Based on horizontal wind speed and wind direction measurements, the
AviMet LLWAS system uses the LLWAS phase III algorithm to
compare the current wind situation differences to airport-specific
threshold values to determine if possible windshear conditions exist.
These calculated conditions are referred to as windshear conditions.
When the values exceed a specific microburst limit, the conditions are
referred to as microburst conditions. See also
microburst alert,
microburst
, and
LLWAS algorithm
.
missing data status A
data status
displayed in the weather data fields in the
Weather View
application with slashes in the data fields. Indicates that there is no data
coming from the sensor due to sensor or system problems. See also
data
status
.
normal data status
A
data status
displayed in the weather data fields in the
Weather View
application. The background color of the field is gray. Indicates that the
data is valid and the system is functioning normally. See also
data
status
.
normal LLWAS
processing status
A data status displayed in the LLWAS screen in the Weather View
application. This status indicates that all LLWAS sensors are operating
and reporting normally. See also
degraded LLWAS processing status
and
support LLWAS processing status
.
obligatory end-user
application
An end-user application that must remain open at all times. If an
obligatory end-user application is closed, the system interprets this as an
error, which is displayed in the
Diagnostics
application.
old data status
A
data status
displayed in the weather data fields in the
Weather View
application. The background color of the field is white. This status
indicates problems in sensor communication. See also
data status
.
Operational event A message type in the
Diagnostics
application.
optional application An optional application or function in the AviMet system that is not
included in the standard configuration.
OWS
Observer
workstation
in the AviMet system.