3.4.1. ACSS TCAS 2000 AND T2CAS
From ACSS, the TCAS 2000 and the T2CAS are available on AIRBUS aircraft to fulfill the traffic awareness function. The TCAS part of the T2CAS is almost identical to the ACSS TCAS 2000. The minor differences only affect the maintenance functions.
More information is available at http://www.acssonboard.com/.
3.4.2. TCAS PART OF ACSS T3CAS
The ACSS T3CAS is a further step of integration including:
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A Mode S transponder capable of ADS-B OUT as per DO-260A Change 2
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A TCAS II compliant with TCAS II Change 7.1
-An enhanced TAWS module derived from T2CAS TAWS module.
The advantages of this integration are the same as for T2CAS, a step further: reduced weight, volume, wiring, and power consumption.
The TCAS module and the Mode S transponder module share the same set of antennas, reducing weight and wirings.
The certification of the T3CAS is expected by end 2009. More information is available at http://www.acssonboard.com/media/brochures/T3CAS.pdf.
3.4.3. ROCKWELL COLLINS TTR 921
From Rockwell Collins, the TTR 921 is available on AIRBUS aircraft. It is a component of the Rockwell Collins ACAS 900 suite.
More information is available at
http://www.rockwellcollins.com/products/cs/at/avionics-systems/legacy-products/index.html.
3.4.4. HONEYWELL TPA 100A
From Honeywell, the TPA 100A is available on AIRBUS aircraft. The latest version of TPA 100A (P/N 940-0351-001) is compliant with TCAS II Change 7.1.
More information is available at http://www.honeywell.com/sites/aero/TCAS.htm.
3.5. FUTURE SYSTEMS
At the time of writing the brochure, no new TCAS is expected on a short term.
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The aim of ATSAW is to improve the traffic awareness of the flight crew thanks to ADS-B. ATSAW is one of those steps that implement new systems to improve the air traffic management. One of the long-term objectives would be the aircraft self-separation. As a first step, ATSAW is limited to the traffic awareness. In addition, it has to be noted that ATSAW is part of a new TCAS computer but it does not address the aircraft collision avoidance. The ACAS part of the TCAS computer still ensures the aircraft collision avoidance.
The concept of ATSAW includes several applications that are optimized for each flight phase (on ground or airborne). AIRBUS already proposes systems capable of airborne ATSAW applications (refer to 3.6.2 – ATSAW Applications) and plans to cover all applications. Manufacturers that propose TCAS computer capable of ATSAW are:
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