Re: How does TCAS get range and bearing?

Dallas <Cybnorm@[EMAIL PROTECTED]
> wrote:
> I have never been able to find out how TCAS works and I've asked several
> people.  Today I tried Wikipedia and a couple of other websites, they
were
> no help on the subject.

> It's my belief that TCAS is not a radar system. 

> As I understand it, TCAS gets altitude information directly from the
> interrogated transponder on the target aircraft.   But how does TCAS
gets
> the range and bearing of targets?

Mode S transponders.

See http://www.arinc.com/downloads/tcas/tcas.pdf
for more than you
ever wanted to know.


-- 
Jim Pennino

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