Re: Space Nav

> [Tomb] Assuming that the US is not
> invoking the special protocol it has in place
> to introduce errors (either localized or
> system wide) in the location information.
>

Snip - bearing in mind that the "Dither Factor" was lifted in march 2000
-
most current civilian GPS units were able to defeat the protocols by
"positional averaging" and to a more limited method - DGPS beacons -
couldn't space nav assume similar "advances" by suitably motivated
people?

Brendan