7.1.4.4. GROUND MAPPING

The AESS automatically generates the Ground Mapping view without any action from the flight crew (i.e. no tilt and gain settings required). A Ground Clutter Suppression continuously runs on data from the weather antenna. To identify ground returns, the Ground Clutter Suppression compares radar returns with the terrain and obstacle databases of the TAWS function. The AESS separates weather and ground returns in the 3D buffer to provide a weather image and a ground image.
Note: if terrain/obstacle elevation from the TAWS database is not valid, the Ground Clutter Suppression does not work properly. The weather image may contain ground returns, and the ground image may contain weather returns.
7.1.5. TCAS FUNCTION
The TCAS function of the AESS is compliant with TCAS II Change 7.0. The collision avoidance principle is not changed. For more details, refer to 3 – Traffic Surveillance.
7.1.6. TRANSPONDER FUNCTION
The transponder function of the AESS is able to:
-Reply to Mode A and C interrogations,
-
Operate in Mode S environments (ELS and EHS),

-
Operate with the TCAS function,

-Broadcast ADS-B messages (compliant with DO-260A3).
Refer to 2 – Aircraft identification and position reporting for more details on
transponder principles.
7.1.7. VERTICAL DISPLAY
The Vertical Display (VD) is one of the novelties introduced by the A380 cockpit. It provides the vertical view of:
-Safety altitudes, -Weather information, and
-Predicted trajectory, -Terrain information. The description of VD in this paragraph focuses on weather and terrain information. For more details, refer to your FCOM.
VD displays the aircraft symbol, the vertical flight plan, and horizontal and vertical scales. VD displays weather and terrain information as a background image. The horizontal scale equals the selected ND range up to 160 NM that is the maximum horizontal VD range (e.g. the horizontal VD range remains at 160 NM even if the ND range is greater than 160 NM in ARC mode). VD adapts the vertical scale to the horizontal scale in order to fit to the VD window. 
The VD background image runs along the lateral flight path defined by the active navigation mode or a manually selected azimuth.
3 The transponder function of the A380 AESS is compliant with DO-260A including the geographic filtering of Mode A code (refer to 2.2.7 – Geographical Filtering of SQWK Code).

.  VD Background Image on the lateral flight path defined by the active navigation  mode
The VD background image runs along:
- 
The FMS flight plan when the navigation mode is managed, or

- 
The XLS approach course, or

- 
The current track when:

.. The navigation mode is managed and the aircraft significantly deviates from the FMS flight plan (see below) or from the XLS approach course, or
　
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