Yes, nice link :-)
It’s easy to spoof GPS.
What is not easy is to somehow fool the redundant on-board positioning systems so that they do not catch the sudden change of location. A sudden shift of location from somewhere over Iran to somewhere over Afghanistan is pretty hard to miss..lol :-)
The instant such a sudden change in GPS takes place the system would know it was being attacked and would no longer rely on any GPS data. It would default to another system like inertial positioning or simply look at the terrain below or check the rf spectrum footprint....there are at least a half dozen ways a drone could get its location...some are non-intuitive and not widely understood.
The fact that GPS is so easy to manipulate is becoming a plus. Many who think they are sophisticated are relying on their ability to mess with GPS as a shield against US tech functioning properly. When the SHTF our stuff will indeed work just fine and they will be a laughingstock :-)
I think the idea was to incrementally change the data so as not to make the changes noticeable (i.e. nudge it, don’t teleport it) to the control s/w. I also would bet that our good personal friends from Russia and China would be helping out as much as possible - so it’s not just the Iranians doing the hacking. Too bad we didn’t leave a big crater and then blame it on them GPS spoofing our JDAM. Oops - sorry about that! ;-)
FRegards,
PrairieDawg