When weather data is received, the airborne system will
display that data for 20 minutes, or until the power is
cycled. If no new data has been received for a given area,
the rainfall will be removed and the area will revert back
to the cyan checkerboard pattern.
The FIS Function is based on a ground-to-air data link
and requires that the appropriate ground systems are
broadcasting weather data and the aircraft is within
reception range of the Ground Broadcast Transceiver
(GBT).
If any weather data has been received in the previous two
minutes, the “Service” indicator in the lower left of the
screen will display “Available.” If no data has been
received in this time period, “Not Available” will be
shown. This indicator shows if the aircraft is currently
within reception coverage of a ground station with
weather broadcast capabilities.
The ground system determines the weather coverage area
and extent of data that is transmitted by each ground
station. The MX20 will display any weather received for
the entire world.
70
Detailed Operation