"Adrian Jansen" wrote in message
...
You might want to consider the implications of WAAS. I have no direct
experience, but the principle is that you take an external signal and use
it
to 'correct' the GPS location to another place - hopefully more accurate.
But what is to stop you sending bogus 'corrections' and making the GPS
think
its somewhere else entirely ? The WAAS signals are much easier to
generate
than the original GPS satellite signals. Sounds an easy way to cheat to
me.

--
Regards,

I do not believe it is at all easy to fake GPS WAAS and GPS is already
acceptable for position. But it is very easy to fake a barograph.

Ivan