On Sat, 20 Dec 2003 12:34:10 -0800, pervect wrote:
On Sat, 20 Dec 2003 18:15:56 +0000, ess (phil
hunt) wrote:

On Fri, 19 Dec 2003 13:43:49 -0500, Ray Drouillard wrote:

Also, since it's not encrypted, it can be spoofed using a local
transmitter

That doesn't logically follow; it's possible to make non-encrypted
data that can't be faked, you just use a digital signature.

If you don't go to spread-spectrum, your radio links will probably be
jammed. (Solution - go to spread spectrum).

Indeed.

I'd still rate a radio location system using spread spectrum
transmitters as rather vulnerable, because the transmitters have to
remain in a fixed location for the system to work, and would be prime
targets.

What if most of the transimtters are turned off most of the time? If
there are fake transmitters, there to soak up hits, and (hopefully)
entice enemy aircraft to put themselves in danger?

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