[quote=spdrun][quote=flyer]As an airline pilot, I’m extremely familiar with everything you’ve mentioned, but I’d still like to see a tracking system that could not be deactivated in flight, so, regardless of the scenario, we could get the last known position of the aircraft.[/quote]
It would have to not use GPS since GPS reception is easy to jam with jammers being easily available. Perhaps a combination of GPS data being sent to a satellite uplink (using a transponder with internal batteries charged independently of the aircraft electrics) and a simple radio signal that can be triangulated if GPS is jammed would work.[/quote]Actually, it is best to use GPS augmented by inertial. GPS has a ‘fast drift’ that is centered about the path, inertial has a ‘slow drift’ about the path. Jamming can be fixed by noticing lack of GPS reception and failing over to pure inertial until GPS returns (Over 100 miles, inertial and GPS tend to be close enough to not really matter – and you will get out of range of the jammer). GPS fudging or faking GPS position (as opposed to jamming) can be seen as a rapid divergence between GPS path and inertial path.
Note: If you are planning to jam GPS, might as well jam the uplink too.
