What if GPS outage? (Score 0)

Ok so if the computer crash was caused by crossing the timeline, what happens if the jets cannot communicate with the GPS satellite network to figure out where the timeline is? What if some country knocks out the GPS network with a bunch of ASATs? Will that disable the entire USAF (once they're mothballed all their F-16s etc)?

Stand-alone systems FTW - distributed architecture just ain't reliable.