On Jan 29, 6:29 am, Bob Noel
wrote:
In article om,

"Kev" wrote:
It's not hard to imagine a fair number of dark / cloudy
accidents in mountainous areas if a GPS signal was mucked with..
either by changing the "altitude" or even just "moving" the plane over
a mile or so.
How do you change the altitude or location of GPS and not have
RAIM or FDE alarm?

For purposes of this speculation, by spoofing the satellite signals.
A GPS receiver's RAIM algorithms wouldn't know any difference as long
as the signals came with "correct" data.

It's not much different than the "evil twin" method of spoofing a
Starbuck's WiFi hotspot, and then capturing everyone's keystrokes as
they log into their bank account. That is, you simply provide a
stronger signal.

Granted, it seems like a lot of work just to try to down a few GA
planes in a small hilly area. Airliners don't use GPS that much, if
at all. So it's not worth the trouble.

Personally, I'm more worried that terrorists are renting homes near
airports, and one day they'll all pop up at the same time with a
shoulder-fired missile. You can just imagine the government deciding
to raze all houses for miles around major airports.

Regards, Kev