17 Dec
2003
17 Dec
'03
11:17 p.m.
Paul_Koning/US/3Com%3COM@smtp1.isd.3com.com writes:
Suppose I want to pretend that I am 1000 feet closer to satellite 4 than I really am. Simple, I take the signals from all the other satellites and delay them by 1 microsecond. That looks like a 1 microsecond local timebase error together with a 1 microsecond delay reduction to satellite 4.
Aren't things even worse? Since the satelite signals are not authenticated with anything like public key methods, couldn't I just synthesize a signal appropriate to any spot on the planet, knowing the positions of the satelites relative to that spot? Perry