Excellent discussion of TCAS here. Well worth reading.
http://en.m.wikipedia.org/wiki/Traffic_collision_avoidance_system
Yes, it is Wikipedia but most uncontroversial stuff is reasonably
accurate I've found. There is some discussion there as the why the US
has gone to UAT on 978 Mhz due to bandwidth limitations on the 1090
extended squitter transponder frequency. It isn't a future problem as
apparently traffic in the LA basin can overload the system already if
everyone is using 1090 ES. I guess there's no chance of that in
Australia as the authorities deliberately make light and sports
aviation more difficult and expensive than it has to be.
Also this
http://en.wikipedia.org/wiki/Aviation_transponder_interrogation_modes#Mode_S
although that article implies you need Mode S for TCAS to see you.
You only need Mode C. Note there is an encrypted Mode 5 used by the military.
Mike
Borgelt Instruments - design & manufacture of quality soaring
instrumentation since 1978
www.borgeltinstruments.com
tel: 07 4635 5784 overseas: int+61-7-4635 5784
mob: 042835 5784 : int+61-42835 5784
P O Box 4607, Toowoomba East, QLD 4350, Australia
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