On 10/8/2010 10:44 AM, J. Forster wrote:
KISS. This seems like a lot of work for not particularily good results.
I think the point is that the results are amazingly better than the alternative if the medium-orbit GPS sats are all destroyed and/or there's jamming coming from all over the sky.
What bothers me is that I haven't figured out yet how the WAAS satellite configuration itself isn't usable as a wide-area GPS jammer. It is just a bent-pipe transponder down from 6 GHz or so to L1, so if you can overpower the uplink with spoofed data that interferes with reception of the other satellites *and* jam the C&C channels that would be used to shut the transponder off, you're able to jam a whole continent at once.
I'm sure this must have been considered before deployment, but I can't find any references to the countermeasure(s).
Matthew Kaufman _______________________________________________ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.
