Whether it's spoofing or jamming, domestic drones are becoming ubiquitous, because they are just so tempting, and sooner or later one is gonna crash onto a populated area, either by accident or deliberate mischief.
A piloted aircraft may be able to avoid hitting a school; a drone may not. -John ================== > On 6/25/12 7:11 PM, Chris Albertson wrote: >> On Mon, Jun 25, 2012 at 6:43 PM,<[email protected]> wrote: >> >>> Yeah, I read it. Typical Fox. The headline isn't accurate since they >>> spoofed the civilian GPS system, not the military GPS. >>> >> >> I think it is. Currently the military uses GPS guided drones put the >> article says they will see more and more used, even by companies like >> Fed >> Ex. I don't think I deliver this will happen soon but it might. The >> article says that these new drones will be susceptible to GPS spoofing. >> >> But there is a simple "fix" that to me seem obvious. When you design a >> nab system for a drone they should use inertial nav. You can't spoof an >> IMU. But the cheap IMUs drift and need GPS updates. So each time you >> update the INU to do a sanity check on the GPS and see if it is within >> the >> drift range of the IMU. If not you assume the GPS is being spoofed and >> continue using the INU data. >> > > > > And of course, this *is* the way almost every autopilot/nav system out > there works.. > > You use IMU+GPS... GPS is long term, but crummy in the short term; IMU > is good short term (e.g. to stabilize flight path), but crummy long term. > > > Not to mention that spoofing GPS is actually fairly hard to do, > reliably.. you have to have an internally consistent set of signals and > observables that seamlessly connects to the original natural set and > then walks off. > > > jamming is easy, spoofing is hard. > > > I would also expect that these things will very quickly go to L1/L5 for > "safety of life" applications, and spoofing 2 frequencies is just that > much harder. >> > > > _______________________________________________ > time-nuts mailing list -- [email protected] > To unsubscribe, go to > https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts > and follow the instructions there. > > _______________________________________________ time-nuts mailing list -- [email protected] To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.
