> Doesn't some of the surveyor gear try to lock onto the frequency to > improve accuracy, even if they can't decrypt the signal?
Yes although P-Code is encrypted, it is usable in some form to improve positional accuracy with some civilian receivers. http://en.wikipedia.org/wiki/GPS_signals > > Also if you know where the source of the jamming is coming from would > it be possible to use that information to over come some of the > degradation? Nope, not if the jamming is any good. Simon _______________________________________________ talk mailing list talk@openstreetmap.org http://lists.openstreetmap.org/listinfo/talk